IBM 5256-1, Maintenance Information Manual

Page 1: ... SY31 0462 0 _ ...

Page 2: ... IBM 5256 Printer Models 1 2 and 3 SY31 0462 0 Maintenance Information Manual ...

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Page 4: ...nance Information Manual SY31 0461 IBM 5256 Printer Maintenance Analysis Procedures MAPs SY31 0572 IBM 5251 Display Station Operator s Guide GA21 9248 IBM 5256 Printer Operator s Guide GA21 9260 IBM 5256 Printer Setup Procedures GA21 9290 IBM 5256 Printer IR Unit and Cause Code Guide ZY31 0505 Note The following pages of the MIM have danger and caution notices If desired translate these notices an...

Page 5: ...print head becomes very hot during printing Primary power is present at the power supply and the Power switch High voltage and current are present at the ferroresonant transformer Resistor 1 in front under the safety cover is very hot while power is on vi Safety ...

Page 6: ...nce restore all safety devices such as guards shields signs and grounding wires 12 Each Customer Engineer is responsible to be certain that no action on his part renders products unsafe or exposes customer personnel to hazards 13 Place removed machine covers in a safe out of the way place where no one can trip over them 14 Ensure that all machine covers are in place before returning machine to cus...

Page 7: ...and Springs 1 18 Adjustment 1 18 122 Platen Gears and Bushing 1 18 Removal Replacement and Adjustment 1 18 123 Platen Pressure Rolls Adjustment 124 Platen Gear Backlash Play Adjustment 125 Forms Motor Gear Backlash Play Adjustment 126 Forms Motor and Emitter Removal and Replacement Disassembly Assembly 127 Forms Feed Emitter Disk Adjustment 128 Forms Motor to Emitter Timing Service Check Adjustmen...

Page 8: ...acitor C3 1 63 C12 Removal and Replacement 1 63 C3 Removal and Replacement 1 63 186 Power Supply Board A1 and Cable 1 64 Removal and Replacement 1 64 187 Transistor Q1 1 65 Service Check 1 65 Removal and Replacement 188 Planar Board B1 Removal and Replacement 189 Printer Wiring Diagram 1 65 1 67 1 67 1 68 DIAGNOSTIC AIDS 1 70 190 Power on Diagnostic 1 70 191 Offline Tests 1 74 Print Test PRT04 1 7...

Page 9: ...and CE Lights Sense Latches Print Emitter Control and Print Timings Power and Signal Distribution Power On and Power Off Timings Print Timings Printer to Adapter Interface Functional Parts Motors Print Head Carrier Print Emiiter and Print Emitter Pickup Ribbon Drive Forms Feed 4 5 4 6 4 6 4 7 4 8 4 9 4 10 4 11 4 12 4 12 4 13 4 13 4 13 4 13 4 14 4 15 4 15 4 15 4 17 4 17 4 18 4 20 4 20 4 19 4 22 4 2...

Page 10: ...Glossary Seq Affected 0 Locations Remove Replace Adjust Wiring Diagram Diagnostic Aids Preventive Maintenance Tools and Test Equipment PM Tools o Theory Features Appendix Index xi ...

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Page 12: ...pring that is pressed into a small space so that it can supply force CR Diode crooked Skewed not straight sloping Glossary Seq Affected Loc Glossary of Tenns and Abbreviations deflector A part that moves something away detenting Locking dr Drive EBCDIC Extended binary coded decimal interchange code EC Engineering change emitter A device that generates pulses of electricity EOM End of message EOQ E...

Page 13: ...ts on the general logic probe pwr Power Q A symbol for transistor r Reset reg Register xiv reinstall Put back the part that was removed remove Take a part off the printer replace replaced Put a new part back in place of one that was removed retract ramp The metal blade that moves the print head away from the platen when the carrier is moved as far as possible to the left in the printer ribbon driv...

Page 14: ...hrough the forms transition Changing from active to inactive or from inactive to active twinaxial A cable made of two twisted wires inside a shield Vac Volts alternating current Vdc Volts direct current Glossary Seq Affected Loc Glossary of Terms and Abbreviations 5256 MIM xv ...

Page 15: ...Legend o Decision Block Information Block Note Block On Page Connector Off Page Connector Start or End of Flowchart Display Screen xvi ...

Page 16: ...cific number or name of the part Glossary of Terms and Abbreviations This section contains definitions of terms and abbreviations that are not common but are used in the M IM and MAPs Glossary Seq Affected Loc Maintenance This section contains location drawings and maintenance procedures for repairing or installing FRUs that the MAPs diagnosed as failing The location drawings are of 2 types a refe...

Page 17: ...features section describes the operation of features for the printer Appendix A Appendix A contains the setup procedures Index The index is a detailed list of all material in the maintenance information manual xviii ...

Page 18: ...nt or 129 A frame Alignment see preceding list also 130 End Of Forms Switch Adjustment Glossary Seq Affected Lac End Maintenance 140 Print Emitter Board and Print Emitter Board to Pickup and Amplifier Card Removal and Replacement or 141 Print Emitter Board Removal and Replacement or 152 Carrier and Main Shaft Removal and Replacement 151 Carrier Support Shaft Removal and Replacement or 162 Print He...

Page 19: ...ctor Release Knobs 1 Carrier Motor and Pulley II Address Switches II Safety Lable II Cable Connectors III Safety Cover II Audible Alarm m Guide ribbon box II Paper Advance Knob II Print Head Retract Lever B Forms Tractor Drive Gear fI1 Paper Advance Knob m TPB2 fIl Ribbon Advance Knob III TPB1 til Ribbon Release Lever in operate position III Horizontal Fine Adjustment Knob m Left Tractor II P3 ...

Page 20: ...bbon Box IE Print Head Cover III Control Panel End of Forms Switch COMO N O N C III IE m II lID III m II til til fI m m Copy Control Dial Connector EC3 under the cover Oil Felt Carrier Ribbon Drive Lines 2 Print Emitter Board Assembly Hold Down Bracket Retract Ramp Drive Belt Carrier Main Shaft Platen Pressure Rolls Connector J 1 Connector P1 m im Top 802 002 EC3 100 101 Glossary Seq Affected Loc ...

Page 21: ...ne filter on some world trade machines II Line Cord II Terminal Block TB1 IE Transformer T1 III Power Adapter Board C1 II Capacitor C5 8 5V II Capacitor C12 AC III Capacitor C4 5V II Terminator Switch m Cable Connectors II Address Switches shown in the 0 position IE Audible Alarm Volume Lever DDII II ...

Page 22: ... Clutches and Gears II Carrier Drive Belt II Print Emitter Board II Carrier Motor 102 103 Glossary Seq Affected Lac III J3 See reference 100 III P3 See reference 100 III Screw to clamp printer in service position III Print Emitter Flat Springs II Belt Clamp IE Print Head Cable EC1 m Compression Spring II Forms Feed Motor III Forms Feed Emitter Maintenance 5256 MIM 1 5 ...

Page 23: ...IONS Power Supply Board A1 See reference 105 III Capacitor C1 10 8V II J4 See reference 105 III TB3 II A1Al II A1A4 II A1Bl II A183 II Capacitor C3 24V IE A1A3 II Capacitor C2 30V II Resistor Rl II Fan Bl II Transistor Ql lID Resistor R2 ...

Page 24: ...5 Vdc 5 Vdc 4 6 Vdc 5 5 Vdc 5 Vdc 4 6 Vdc 5 5 Vdc Wire on Sets wire check to adapter Left margin Left margin to adapter A forms drive A carrier drive Ground from A1A3 and A1A4 Ground from A1A4 21 Wire Check Jumper normal position S V3 V4 1 V5 J4 white dot G6 indicates G7 position 1 GS 22 Left Margin Jumper 15 normal position 23 R3 40 cps has resistor R3 SO and 120 cps have jumper 23 14 80ard Al CR...

Page 25: ...rnal system cable Notes 1 8 1 Plugged only if the Cable Thru feature is not installed 2 II and II are part of the planar interface cable 3 This cable is polarity sensitive Language Group Bit 01234 Country 00000 U S and Canada 00001 ASCII international 00010 Austria and Germany 00011 Belgium 00100 Brazil 00101 Denmark and Norway 001 10 Finland and Sweden 001 1 1 France 01000 Italy 01001 Japan 01010...

Page 26: ...ower good B03 Power on reset 003 5V B04 Ground 004 5V B05 Ground 005 5V B06 Ground 006 5V B07 Ground 007 5V BOB Ground OOB 5V B09 Ground 009 5V Bl0 Ground 010 5V Bll Ground 011 B 5V B12 Unused 012 B SV B13 SV 013 Unused Board C1 Connections Transformer T1 Wires C1 60 Hz U S El E2 E3 E4 10 E5 11 E6 9 E7 19 EB 20 E9 lB El0 16 Ell I 17 E12 15 E13 7 E14 13 E15 E16 106 107 Glossary Seq Affected Lac 60 ...

Page 27: ...internal system cable and the Cable Thru feature wiring Always connect the black striped wire to the socket terminal beside the black dot to the right hand side of the Terminator switch and to position 6 of the connector that attaches to the planar Note For cable quality checks refer to the controller documentation AC Cable Assembly Part of Secondary AC Cable power to 1O 8V and 30V supplies Addres...

Page 28: ...le cables or connectors during an electrical storm Typical Installation System Controller Building 1 Work Station Station Protector Board Outdoor Cable Station Protector 1 I I I Cathode __ An0 de I L_____ 108 Glossary Seq Affected Loc Only use CE meter part 1749231 Use the R x 100 scale 1 2 Check each diode with the black lead connected to the anode and the red lead connected to the cathode The re...

Page 29: ...the machine base Top Cover Removal and Replacement 1 For ribbon changing and observation slide the top cover II forward 2 To remove the top cover D slide it forward lift it up and remove it to the front Back Cover Removal and Replacement 1 Loosen the faste ners II and pull the back cover II back to free the front cover II 2 Lift the cover up and remove it to the rear Front Cover Removal and Replac...

Page 30: ... screws Reinstall the control panel by reversing the procedure 110 111 Remove Replace Adjust AC Cable Assembly Removal and Replacement The AC cable assembly includes the Power switch and the fuse 1 Power off 2 Disconnect the line cord from the wall outlet 3 4 5 Remove the printer covers 110 At the control panel looserr the lower screw and remove the upper screw at each end of the panel support bra...

Page 31: ...the left end of the printer 8 Lift the right end of the printer slightly and slide the printer to the right to clear the screws II 9 Lift the printer from the power supply If the bottom of the printer is to be serviced remove the paper deflector and set the printer into the service position II on the base so that the print emitter IIpoints upward Hold the printer in this position with a base screw...

Page 32: ...1m Service Position Power Supply 115 Remove Replace Adjust Left End View Maintenance 5256 MIM 1 15 ...

Page 33: ... CARDS INTERPOSERS AND JUMPERS Boards Part Planar Board B1 See Gi the caution Power Adapter Board C1 4176517 Power Supply Board A1 1638818 Print Emitter 1638711 Cards A1A1 5863340 A1B1 5863342 A1B3 5863341 Print Emitter pickup 843202 Interposer 2731011 Jumper 1794401 CAUTION 1 16 The logic on planar board B1 can be damaged by electrostatic discharge Do not touch any conducting metal parts Hold the...

Page 34: ...locating arms lID both ends Bend the tabs II to engage the locating arms a if needed c Center the print head on the platen d Align the groove a in the gear end of the platen shaft with the side plate Then press down on both ends of the platen Ensure that the gears engage correctly e Ensure that the Platen Release levers are completely seated f Turn the platen to check for binds Close the front cov...

Page 35: ...the locking screw Check the platen gear backlash play adjustment 124 Reinstall the printer cover 110 Reinstall the forms tractor 131 Left Side Right Side Lever Spring small Make sure that the print head forms guide does not strike the paper release lever here when the head moves to the extreme left Lever Spring large 1 18 122 PLATEN GEARS AND BUSHING Removal Replacement and Adjustment 1 Power off ...

Page 36: ...uge on the cam II and hold it there by pressing the cam follower B on the gauge d Pivot the clamp collars so that the bell cranks II seat on the bottom of the 4 openings then tighten the 4 clamp collars II e Remove the gauge check the adjustment and adjust again if needed Install the platen and paper deflector print head centered on the platen Adjust the pressure roll arms a Loosen the 2 nuts D th...

Page 37: ...ect backlash play at other locations 1 Power off 2 Remove the printer covers 110 3 Loosen the 3 forms motor and emitter mounting screws II 4 Turn the gears so that a hole II in the idler gear is aligned with the gear shafts as shown II 5 Position the motor up and back so that the gears engage tightly 6 Tighten the mounting screws 7 Check for no binds and adjust again if needed 8 Reinstall the prin...

Page 38: ...the emitter base B on the motor 5 Turn the gears as needed so that a hole II in the idler gear is aligned with the gear shafts as shown II 6 Turn the emitter base B on the motor so that the gears engage tightly 7 Tighten the 2 screws and the nut II 8 Check for binds and adjust again if needed 9 Reinstall the forms motor and emitter assembly 10 Adjust the platen gear backlash play 124 11 Assemble t...

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Page 40: ...and place the printer in the service position 115 126 Blue 1 Frame I I I I 0 0 0 8 CBA Remove Replace Adjust 6 7 For installation only adjust the platen gear backlash play 124 and return here While holding the forms motor and emitter assembly remove the 3 mounting screws from the right side frame II 8 Remove the motor and emitter assembly To remove any parts from the motor and emitter assembly dis...

Page 41: ... II that fasten the base II to the motor II Do not tighten the screws and bolt now Install the idler gear II with the longest hub toward the motor and install the clip 3 Install the inner cover lEI with the 2 adjusting screws D finger tight 4 Place the photocell assembly III on the disk and gear assembly II and slide them on the motor shaft 5 Fasten the photocell assembly with its mounting screw 6...

Page 42: ... opening Do not scratch the black paint from around the disk holes A 0 76 mm 0 030 inch thickness gauge should slide freely on the upper si e of the disk Check the gap at several points on the disk Forms Feed Motor rotated 90 0 clockwise 126 127 Remove Replace Adjust 4 Tighten the clamp collar and check the gap 5 Reinstall the outer cover 6 Reinstall the motor and emitter assembly 126 0 63 mm to 0...

Page 43: ...I 6 Power on 7 Verify the adjustment as follows 8 a At a Platen knob use a small amount of force in the direction to move the forms up The probe should remain at the up level when you remove your hand from the Platen knob b At a Platen knob use a small amount of force in the direction to move the forms down The probe should remain at a down level when you remove your hand from the Platen knob If t...

Page 44: ...f and then comes back on a Hold the photocell assembly tightly in place and tighten the 2 screws II b Verify the adjustment as follows At a Platen knob use a small amount of force in the direction to move the forms up The probe should remain at the up level when you remove your hand from the Platen knob At a Platen knob use a small amount of force in the direction to move the forms down The probe ...

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Page 46: ... a brass punch and a hammer tap on the A frame left side plate to obtain the specified gap 7 Tightly fasten the A frame mounting screws Loctite is not needed check the gap and adjust again if needed 8 9 Check the gap at the right end of the platen If the gap is not correct continue on to the next step If the gap is correct install the printer cover 110 power on and set the Copy Control dial for co...

Page 47: ... front of the printer 1 30 10 Insert a 0 076 mm 0 030 inch thickness gauge between the top of the actuator lever and the bottom of the platen groove Slowly push the switch mount toward the rear until the meter indicates that the switch has operated Note The gauge must be held horizontal and not inserted too far or the adjustment will not be correct 11 Tighten the screws 0 and check the adjustment ...

Page 48: ... D C N O N C o Top View f emove Replace Adjust l Maintenance 5256 MIM 1 31 ...

Page 49: ...eat the rear legs on the pins Then seat the front legs over the platen shaft Note When reinstalling ensure that the gears 0 engage correctly and that the platen and the forms tractors turn D 1 32 Disassembly and Assembly 1 Disassemble as needed as shown in the figure The end covers are removed by just pulling them off 2 When the chain gears are installed slide the gears together and ensure that th...

Page 50: ... UNIT CHAIN COVER Service Check Check for 0 63 mm to 1 13 mm 0 025 inch to 0 045 inch between the chain guide II and the cover Adjust if needed Adjustment Bend the cover stops so that the gap between the chain guide II and cover II is 0 63 mm to 1 13 mm 0 025 inch to 0 045 inch It might be necessary to put the hinge brackets II in another position to obtain this gap o a 0 63 mm tq 1 13 mm 0 025 in...

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Page 52: ...e back side and remove the clip 3 Slide the removable pin from the chain The chain tensioner and spring might fall out 4 To reinstall a chain reverse the procedure 133 134 Remove Replace Adjust Left Tractor Assembly 134 FORMS GUIDE RACK STATIC ELIMINATOR REPLACEMENT Install the static eliminator as shown in the front view below I D Maintenance 5256 MIM 1 35 ...

Page 53: ...ligning tools through the emitter pickup and board II e Perform the adjustment if the 2 aligning tools cannot be inserted 1 36 Adjustment 1 2 Adjust the print emitter board as follows a Separate the printer from power supply board A1 115 b Turn the Horizontal Fine Adjustment knob IE fully counterclockwise emitter in the leftmost position c Loosen the 2 setscrews II d Slide the emitter board as far...

Page 54: ... the safetY cover label if they are not record the way they are connected 4 Disconnect P2A and P28 5 For installation adjust the print emitter pickup and amplifier card 140 6 CAUTION The coil spring B is released when the pickup mounting screws are removed Remove 2 screws II that hold the pickup to the carrier 7 Reinstall the pickup by reversing this procedure 140 Remove Replace Adjust DO Undersid...

Page 55: ...times a 1 or a 3 appear on the left side of the form Adjustment This adjustment is to ensure that the fall of the left margin signal is centered between 2 print emitter 3 signals 1 Power off 2 Remove the printer covers 110 3 4 5 6 7 B Turn the Horizontal Fine Adjustment knob II to the center of its movement Push the carrier against the left side frame Using the CE probe observe the left margin sig...

Page 56: ...141 143 Dc Jc JCJD J2 0 Bottom View The white dot indicates Position 1 Remove Replace Adjust II Connect Position 3 See the location below Maintenance 5256 MIM 1 39 ...

Page 57: ... of the bearing eccentric D Remove the ribbon drive clutches for access 171 c Turn the eccentric to obtain 0 025 mm to 0 076 mm 0 001 inch to 0 003 inch gap between the bearing and shaft while pushing on the bottom of the carrier as shown in the figure d Tighten the socket screw on the end of the bearing eccentric e Check the gap again and adjust if needed f Assemble the printer and power supply 3...

Page 58: ...0 3 Remove the print emitter 141 4 Remove the print head 160 5 Separate the printer from power supply board A1 115 6 Loosen the belt clamp IE and remove the belt from the motor For installation ensure the belt alignment is correct 153 7 8 9 Remove the print emitter pickup 140 Remove the ribbon drive lines 173 Remove the screw from each end of the carrier main shaft II 10 Pivot the carrier and main...

Page 59: ...nd the screw D 4 Remove the belt from the motor pulley 5 6 Remove the screw D Then remove the tensioner assembly When reinstalling do not tighten the screw until alignment is completed To reinstall reverse this procedure Carrier Bracket Belt Clamp 80 cps and 120 cps Belt Tensioner Assembly D Move the belt tensioner assembly to get proper belt alignment as shown at e Underside View of Printer in Se...

Page 60: ...in Service Position 153 155 Remove Replace Adjust 155 CARRIER LEAF SPRING AND BEARING Removal and Replacement 1 2 3 4 Power off Separate the printer from power supply board A1 and place the printer in the service position 115 Remove the 2 screws from the leaf spring and bearing II Then remove the assembly Reinstall the assembly by reversing this procedure Ensure the bearing sides are parallel to t...

Page 61: ... Removal and Replacement DANGER The print head may be very hot after continued use Always let the head cool before removing it 1 Power off 2 Remove the printer cover 110 3 For new print head installation put IBM No 6 oil on the 2 felt washers on the right bar the bronze block and rear slide points on the left bar 4 Push the print head to the ramp position far left 5 For installation push the print...

Page 62: ...crews II and remove the guide 5 Install the new guide with the screws loose 6 Center the guide in the mounting holes press it toward the print head and tighten the screws 7 Complete the operation by reversing the first 4 steps o fl 160 161 Remove Replace Adjust 0 30 mm to 0 35 mm 0 012 inch to 0 014 inch II I l T lo II 40 cps and 80 cps mOil Wick Installation Print Head Print Wires The oil wick mu...

Page 63: ...g screws for the print emitter pickup the coil spring II is released Loosen the print emitter pickup cable clamp II Remove the clamp screw on the left side and remove the wires from under the clamp fI D 7 Loosen the belt clamp II Remove the cable clamp bracket II 2 screws 1 46 8 Work the cable out of the holes in the casting II and push the connector through the hole 9 Remove the 2 screws from the...

Page 64: ... the locking arms IE are at the left 7 Place the 2 small cables under the clamp for the print emitter pickup and install the screws loosely 8 Form the cable to the flat spring 9 Form a loop in the cable II at the end of the flat spring 10 Form the print head cable around the head mounting pin II before connecting the cable to EC3 The loop must be large enough here so the cable causes no interferen...

Page 65: ...versing the first 5 steps 164 PRINT HEAD RIBBON LIFTER Removal and Replacement 1 Power off and remove the top cover 110 2 Remove the print head 160 Adjust the print head during installation 3 Remove the screw B and the ribbon lifter II 4 When installing adjust the tip of the lifter 0 00 mm to 0 05 mm 0 000 inch to 0 002 inch II behind the tip of the print head II when the Copy Control dial II is s...

Page 66: ...en return to step 2 of this procedure 2 Remove the 2 screws II and replace the ribbon shield For adjustment only loosen but do not remove the screws 3 Install the platen without the paper deflector 4 Set the Copy Control dial II to O 5 Place 0 30 mm to 0 50 mm 0 012 inch to 0 020 inch of paper or cards 2 or 3 cards between the ribbon shield and the platen 6 Push the print head tightly against the ...

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Page 68: ...carrier against the left side frame 5 Set the Copy Control dial II to O 6 Position the retrad ramp II so that the Copy Control dial is 2 41 mm 0 13 mm 0 095 inch 0 005 inch from the print head housing Use a code plate alignment tool part 460028 as shown II to measure this setting Tighten the 2 screws 7 Complete the procedure by reversing steps 1 and 2 o Print Head Retract Ramp Underside View of Pr...

Page 69: ...ling the clutches 1 52 172 RIBBON DRIVE SHAFT Removal and Replacement 1 Power off and remove the printer covers 110 2 Remove the ribbon 177 3 Remove the clip at the Ribbon Advance knob II 4 Separate the printer from power supply board A1 and place the printer in the service position 115 5 Remove the ribbon drive lines 173 and take the drive belt off the motor pulley 6 7 Remove the shaft II with th...

Page 70: ...170 173 Remove Replace Adjust Underside View of Printer in the Service Position Upper Clutch Lower Clutch I Clip Maintenance 5256 MIM 1 53 ...

Page 71: ...ed rolls are in place hold the Iat spring II to the right and turn the left feed rolls toward the platen 4 To reinstall the feed rolls reverse this procedure Align the right feed rolls vertically to the left rolls II 1 54 175 RIBBON DRIVE GEARS Removal and Replacement 1 Power off 2 Separate the printer from power supply board A1 115 3 Remove the clips III and remove the gears from the feed roll sh...

Page 72: ... and form a loop 7 Thread the side of the loop nearest the platen as shown on the ribbon box label Thread this end just past the print head Close the feed rolls 8 9 Thread the other end of the ribbon as shown The half twist should now be beside the horizontal guides Tighten the ribbon by turning the knob 11 Guide the ribbon between the horizontal guides so that 1 4 turn counterclockwise is on each...

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Page 74: ...ct Jl fJ 8 Remove the TBl wiresEJ 9 Disconnect C1A1D 10 Remove the line cord from the terminal blockD if a line filter is present remove phase A from A neutral from B 189 11 Support the power supply and remove it from the printer by pulling as shown in the drawing 12 Reinstall the power supply by reversing this procedure Ripple Level Check The peak to peak output ripple level should be less than 3...

Page 75: ...s E4 through E14 of board C1 D II 7 Disconnect J 1 on the right side of the printer II 8 Remove the transformer grounding lead if one is present Do not remove the wire from E15 on board C1 to the power supply base 9 Remove the 4 transformer mounting screws A grounding washer is under the left rear leg II 10 Lift the transformer from the power supply 11 Reinstall the transformer by reversing this p...

Page 76: ...0 2 230 1 181 7 4 7 7 7 7 5 and 8 2 and 3 5 and 8 5 and 8 5 and 8 5 and 8 0 2 Leg Grounding Washer Remove Replace Adjust 50 Hertz 189 Input Phase A Vac From F1 Neutral Fans 100 7 9 5 and 8 110 6 9 5 and 8 123 5 4 9 5 and 8 200 3 9 5 and 8 220 2 9 5 and 8 235 1 9 5 and 8 Maintenance 5256 MIM 1 59 ...

Page 77: ... reinstalling the fan ensure that the air flow direction mark points away from the bracket 5 Reinstall the fan by reversing this procedure 183 TB2 AND LINE FILTER The line filter is not used on all machines TB2 Removal and Replacement 1 2 3 4 Power off Remove the printer back cover 110 Remove the shield from TB2 II Remove the line cord wires from TB2 phase A from 2 and neutral from 1 III 189 1 60 ...

Page 78: ...Line Filter used on World Trade some machines ACB Brown Blue l a 182 183 Remove Replace Adjust Position 1 of TB1 Maintenance 5256 MIM 1 61 ...

Page 79: ...ly toward 0 ohms and then slowly toward infinity 00 each time the meter is connected or the wires are reversed the capacitor is OK If not the capacitor should be replaced 1 62 Removal and Replacement 1 Power off 2 Remove the printer back cover 110 3 Disconnect C1 A1 II 4 Disconnect the wires from E3 through E1611 5 Loosen the clamp II that holds capacitors C4 and C511 6 Lift the board and capacito...

Page 80: ... to the case D 4 After discharging the capacitor remove the leads 5 Loosen the capacitor clamp II and remove the capacitor 6 Reinstall the capacitor by reversing this procedure 184 185 Remove Replace Adjust C3 Removal and Replacement See 184 for a capacitor check 1 Remove the power supply board A1 186 2 3 Note the polarity connections Then remove the 2 capacitor connecting screws II on the bottom ...

Page 81: ...onnect and label the capacitor cable leads II as shown 6 Disconnect the cables from A1A3 and A1A411 Power Supply Board A1 D D Fan B1 _ m R1 C2 TOP1m 1 64 7 Remove the screw and stud from capacitor C3 II 8 Remove the 2 screws III and move the fan to the side 9 Remove the 2 screws and II and lift the board out 1O For installation locate C3 as far to the rear of the board as possible and locate the b...

Page 82: ...er direction for all 3 pairs of leads Change the resistance scale if needed to verify the readings 8 Reconnect the transistor leads to the pins on board A1 189 9 Complete the procedure by replacing the transistor see below or by reversing this procedure 186 187 Remove Replace Adjust Removal and Replacement 1 2 3 4 5 Separate the printer from power supply board A1 115 Remove the gray safety cover R...

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Page 84: ...hen you put the planar on any surface 188 Remove Replace Adjust 1 2 3 4 5 6 Power off Remove the rear cover 110 Disconnect the cables II Remove the interposers Slide the power supply to the service position 116 Remove the planar and Its frame D from the power supply 7 Remove the plastic pins fJ that hold the planar board to its frame 8 Remove the planar boardll 9 Ensure that jumpers for language g...

Page 85: ...below AI Bl 005 006 007 OS J05 J06 J07 JOS A1A1J03 A183 DOS 006 007 P03 J05 J06 J07 JOB Al l3A TP V5 i5Vdc Print Emitter Pickup B05 P J P 33 EC2 4 t 004 t 31 Al 15B TP G8 Print Emitter Board AR J2 3 P2A4 P ECI J Z2 Left Margin 0 t B04 E 4cr u A TP LMI Tp LM2 AlAI DOS J24 P2B l J 5 J2 6 J2 8 P2A2 J2 1 ____ P2 A 3 J 2 2____ TPB2 Comm TPBl __I A __l ________ r TN C 8 8 11 P ECI J Print Emitter 1 J A1...

Page 86: ...w C1BI2 Cancel Sw CI813 StartSw CID04 5 Vdc ClD03 Ground Cl00S Twinaxial Signal wh blue J5 3 wh red JS 6 Twinaxial Ground JS I 189 Planar Board BI A1812 A1A3 B12 Wire On B1B09 A1A4 B09 A1D02 A1A3 002 B1Bl0 A1A4 Bl0 Print Wire Drive Card A1A3 J A1B03 B03 Print Wire 1 B07 A1D04 004 Print Wire 2 BOS A1B04 B04 Print Wire 3 B09 AIDOS DOS Print Wire 4 Bl0 AIBOS BOS Print Wire S G07 AI 006 006 Print Wire...

Page 87: ...nce of events that occur when the Power switch is pressed POR is not part of the diagnostic but results from turning on power to the printer Press the Power switch 8 Page 1 71 Turns on all lights Degates the driver and receiver Initializes all logic hard ware and sets the IAR to 0000 __1 __T_es_t_a_ _L_E_D_S_____ __ 1 _E_x_ce_ p _t_p_o_we_r_o_n ____ 1 70 ...

Page 88: ...or data paths registers in the MPU read write storage and read only storage Checks read write storage with patterns If the Cable Thru feature is installed and the address switches are set to 7 the cable adapter test fails because of an invalid address Wiring Diagram Diagnostic Aids Maintenance 5256 MIM 1 71 ...

Page 89: ...ention lights are on the printer hardware failed If the 2 lights are off the planar failed Sends poll response frame 1 basic status to the controller Controller and System Power on diagnostics will end here if the con troller is not polling or if the printer is not connected to the controller Indicates line activity Indicates that the printer is being polled 1 72 ...

Page 90: ...ition status response to a poll command Acknowledgement is in the next poll command Successful host system communications is established The 5256 Printer is now online and is available for printing Wiring Diagram Diagnostic Aids Maintenance 5256 MIM 1 73 ...

Page 91: ...ng chart shows the switch combinations for selecting the tests Test Number PRT04 PRT05 PRT06 PRT07 PRTOS PRT09 PRT10 PRT11 PRT12 PRT13 PRT14 PRT15 Name Print Carrier motor Forms motor Alignment Print character set Print receive buffers Left margin recognition Printer characteristics display Data storage Address switches Set transparent mode Print wire tab Switch SP FF ST ST SP FF ST FF ST SP FF ST...

Page 92: ...phases move the motor in steps that are not equal The motor might also move backward It is normal for the motor to step backward for the first step to locate correct position Too much platen or motor gear backlash play might cause steps that are not equal 124 125 The low speed test continues until you press the Start switch Pressing the Start switch causes the forms motor and emitter operation to ...

Page 93: ...oABCDEFGHI JKLMNOPQR STUVWXYZ 0123456789 Denmark and Norway A A X_ abcdefghi jkLMnop r I ijstuvwXyZ ABCDEFGHI JKLMNOPQR STUVWXYZ 0123456789 Finland and Sweden C UA A I ti X_ O abcdefghi jkLMnop r I listuvwxyZ aABCDEFGHI JKLMNOPQR t STUVWXYZ 0123456789 France o S A I b X_ t abcdefghi jkLMnop r I stuvWXyZ ABCDEFGHI eJKLMNOPQR STUVWXYZ 0123456789 Italy o L 6S A I b I_ b I abcdefghi jkLffinop r I lstu...

Page 94: ...ween E1 and E2 Between E2 and E3 The best position is indicated by a count of 2 or a combination of 2 with sometimes a 1 or a 3 This shows that the left margin pulse is active as far as possible from the print emitter 3 pulses between emitter pulses 1 and 2 is best during a 1 or 2 pulse is acceptable 191 Wiring Diagram Dia nostic Aids To obtain the best location move plug P2B and repeat this test ...

Page 95: ...lems or debug application programs When operating in this mode all data characters and formatting control codes is printed in hexadecimal code with the character repre senting the code printed below To aid counting and identification a hexadecimal count is printed above every 16th character and a vertical bar above every 8th character starting from the 2nd character on the left The 2nd digit on th...

Page 96: ... for 15 spaces and then prints 15 alignment characters to the left ____ Left Margin I I 15 Spaces 15 Characters t I I I I B B B B I tltH I tl 113 rJ The print wire drivers are off during the line spacing and tabbing operations This allows the probe to be used in checking for correct print wire operation 1The 120 cps printer does not tab at high speed 191 Wiring Diagram Diagnostic Aids Maintenance ...

Page 97: ...job Not a methods wi be described here because they are system operating procedures If you do not under stand the system use the procedure in the flowchart below If the test is to be printed set up the printer for normal operation Ensure that the Status switch is in the Normal position No Contact the system operator for assistance MSIPL msg waiting etc Prime option menu displayed If any message or...

Page 98: ...Option 1 Prime Option 2 ERAP Option 7 Prime Option 3 See the maintenance documentation for the controller Wiring Diagram Diagnostic Aids ERAP Option 8 Prime Option 4 See the IBM 5251 Model 11 Display Station Maintenance Information Manual SY31 0461 Prime Option 5 See the maintenance documentation for the controller ERAP Option 9 Maintenance 5256 MIM 1 81 ...

Page 99: ...ters in a ripple pattern Suppression of nulls Automatic new line Formatting Setting horizontal format Setting vertical format Absolute horizontal position Absolute vertical position Relative horizontal position Relative vertical position New line Interchange record separator IRS Carrier return Line feed ForlT s feed Graphic error option A sample printout of the test is at the end of the flowchart ...

Page 100: ...192 Wiring Diagram Diagnostic Aids To select Configuration Data 1 Press the 3 key 2 Press the Enter key The descriptions for configuration data are 1 Device Addr is the address of the controller 2 Unit Addr is the address of station s assigned to the controller The first digit is the port number and the second digit is the station address 3 Logical ID is the name the system uses to address this st...

Page 101: ...does not appear if only one matrix printer is attached to the system If you only want to look at the error tables on the display screen a Press the 1 key b Press the Enter key If you want a printout of the error tables a Press the 2 key b Press the Enter key Line 2 does not appear if only one matrix printer is attached to the system 1 84 1 Key the ID a letter and a number of the printer that will ...

Page 102: ...ed by pressing the Enter key after each one has been displayed or printed If you are printing the tables all 3 will print one after the other You do not have to press the Enter key The tables can be reprinted by pressing the Enter key when the display screen shows that the printing is completed For printer problem identification see the error history table printout at the end of this diagram Press...

Page 103: ...klmnoP rstuvwxyz abcdefghijklmnop rstuvwxyz 1 I X_I 1 I X_ O I I X_I O I I X_I I I I X_I I 1 X_ I 1 1 I Y _ 1 1 IOf X_I I 1 e I 1 1 _ I I I l X_I I I 1 i X_ I 1 1 j X_ I 1 1 1 3 4 5 6 7 B 9 0 1 2 3 123456789012345678901234567890123456709012345678901234567B901234567B901234567B9012345678901234567B9012345678901234567B901234567B9012 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 33 XXXXXXXX 33 34...

Page 104: ...FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF 901234567890123456789012345678901234567890123456789012345678901234567890123456789012 901234567890123456789012345678901234567890123456789012345678901234567890123456789012 01 I 1 I 2 I 3 I 4 I 5 I 6 I 7 I 4444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444...

Page 105: ...0 0000 0000 0000 0000 0000 0000 0000 0000 0001 0000 0000 0000 0000 0000 0000 TABLE o 1 DATE YY MM DD 77 10 12 77 10 12 77 10 j 2 77 10 12 77 j O 12 77 10 12 77 10 12 77 10 11 77 10 11 77 10 11 77 j O 11 77 10 10 77 j O 10 77 10 10 77 10 10 77 10 10 77 10 10 77 10 10 TIME HH MM SS 09 35 11 09 34 31 09 34 18 09 34 11 09 34 04 09 02 04 08 56 47 06 46 46 04 26 25 03 25 27 01 j 7 25 21 52 49 20 45 44 2...

Page 106: ...in session 0220 6 Invalid command or device 10 0221 10 Undefined exception status 110 See note 3 0222 7 Input queue or storage overrUn 0223 12 Activate lost controller problem should have been reported as 0204 See note 3 0224 8 Invalid activate 0225 11 Undefined exception status 011 See note 3 0226 27 Graphic check See note 1 0228 25 I nvalid SCS control character See note 1 0229 26 Invalid SCS pa...

Page 107: ...nar Internal Check 5 Used only during power on sequen ce and when checking status in test mode Graphic Check 6 lndicates that an unprintable character has been detected by the printer and the printer is set up to stop on this condition by the host program The Attention light will be on and the Ready light will be off 1 90 Data Cleared 7 lndicates that a clear command to reset the input buffers has...

Page 108: ...e controller Test mode also changes the meaning of the lights from that described under Lights preceding to the following Error Status Switch Set to Test Code Wire Check A print wire was turned on too long 31 41 Slow Speed Check The print head moved too 42 slowly Fast Speed Check The print head moved too 33 43 quickly Emitter Sequence Check Emitter pulses were 34 44 missing or occurred in the wron...

Page 109: ...er pulse was missed because the pickup failed or the pulse came on too soon after the previous pulse 1 92 3 All 3 emitter pulses were on or off at the same time This kind of emitter sequence error is the only one that can occur during the stop time turnaround If lights 3 and 4 are both on the emitter pulse probably was early and so short that it was gone before the fast speed check minimum spacing...

Page 110: ...ssed first if the Stop switch was not pressed no action results Test mode This switch is used with the Form Feed and Start switches in selecting offline tests The line feed action is not done when the printer is in test mode Wiring Diagram Diagnostic Aids Form Feed switch A momentary contact switch that operates in 2 different machine modes Normal mode This switch causes a series of line feeds to ...

Page 111: ...ing row of dots II Random missing dots single characters have missing dots Check the platen surface Check the print head for binds Check the ribbon for damage a Extra dots all char cters have extra dots II Dots not al igned vertically Check the carrier and ribbon for binds II Character cannot be recognized IJ Character width incorrect 1 94 II IJ ...

Page 112: ...emitter adjustment 140 Wiring Diagram Diagnostic Aids R I t fJf J I II I f Jf I I 1I 1 Bf I f I f I t I F J I J B f4 t4 f lfJl J 1 13fJ f lf I OO I3 I J F I II f lf lt l f lL f F I I t I3f 1 l3 l l f I m f I II II II IJ Vertical registration variable line spacing Vertical registration characters above and or below the normal line Check the carrier adjustment 150 Horizontal registration variable co...

Page 113: ...E17 bl D me ern c c C c 1Can be ordered from Mechanicsburg E18 If fJ J 1 96 Probe Test Ground the probe at B1 D1 D08 on the planar board Probe B1 D1 B02 on the planar board Both lights should be on Probe Light Conditions Two lights are used to indicate status The 2 lights indicate 4 conditions Condition Lights Up Down Up light on continuously Down light on continuously Pulsing Invalid signal or no...

Page 114: ...erposers Remove the interpose and make continuity check as chart below indicates J Removing Wire From Plugs P2 P3 P4 and P5 Lift the plastic tab slightly with a very small screwdriver or knife until the wire can be pulled out 196 Wiring Diagram Diagnostic Aids Maintenance 5256 MIM 1 97 ...

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Page 116: ...ack cover Change or clean the filter in the right rear corner as viewed from the front Print emitter Lubricate Pickup pads Contact points 7 between the emitter board and the side frame Horizontal fine adjustment threads and shaft sides Carrier drive Lubricate the belt tensioner shaft Forms feed drive Lubricate the idler gear stud Platen Lubricate the bushings Power supply Check the fan operation 2...

Page 117: ...t Points 3 between the Emitter Board and the Right Side of the Frame Horizontal Fine Adjustment Threads II Pickup Pads 4 between the Emitter Board and the Pickup Card II Contact Points 4 between the Emitter Board and the Left Side of the Frame II Belt Tensioner Guide Shaft 2 2 ...

Page 118: ... Use IBM No 23 grease for Bottom Forms Tractor Shaft light film II Top Forms Tractor Shaft light film Preventive Maintenance 5256 MIM 2 3 PM Tools ...

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Page 120: ...e of this probe on the printer is in 196 Refer to the instruction book shipped with the probe for a description of the probe and its operation Standard CE Tool Kit Tools normally used by the CE are in this kit Metric Tool Kit A kit of metric tools is available from Mechanicsburg by ordering bill of material 1749235 Note In the 5256 all metric screws are blue PM Tools Tools and Test Equipment UP DO...

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Page 122: ...second 4 inches second Model 2 prints at 80 characters per second 203 2 mm second 8 inches second Model 3 prints at 120 characters per second 304 8 mm second 12 inches second Models 1 and 2 tab at high speed Theory The print line is up to 132 characters long As many as 96 different characters can be printed 128 for Katakana Verticalspacing is 6 or 8 lines per 25 4 mm 1 inch selected by a switch Hi...

Page 123: ...inter Motion and Timing AC Source U II I I r1 g c J g go CJ r Printer Power Supply It r yStatus 9 0oI 01171 _ Wire Check 1r I End of v n em l I l Forms n j Control Panel f r V Lights and I I I I I Switches Print Wire Drivers See the note Print Emitter Amplifiers and Left Margin Amplifier Carrier Stepper Motor Drivers See the note Forms Feed Stepper Motor Drivers See the note Forms Feed Emitter Amp...

Page 124: ...ion The maximum misalignment of a vertical print emitter pickup land pattern and the vertical part of the print emitter board land pattern occurs every 0 76 mm 0 030 inch Because each vertical print emitter pickup land pattern is displaced by 0 25 mm 0 010 inch a print emitter pulse occurs every 0 25 mm 0 010 inch When the horizontal land pattern of the print emitter pickup is aligned with the hor...

Page 125: ...nter operation the MPU services the printer interface registers as needed to keep the printer operating A print routine contains microcode that handles the recognition of print buffer contents determines in which direction and how far the print head is to move and controls line feeding print head motion starting and stopping 4 4 The M PU uses the print routine to recognize the starting point of th...

Page 126: ...sed to a display station or to another printer The following figure shows the possible arrangements System f I I I I I Data is sent to the 5256 for printing IBM 5256 Printer IBM 5251 Display Stations or Printers with Cable Thru Feature Theory Features series must not exceed 1 524 meters 5000 feet Theory 5256 MIM 4 5 ...

Page 127: ...at a transition occurs during each bit time a 0 to 1 transition for a 0 and a 1 to 0 transition for a 1 If no transition occurs during a bit time a code violation has occurred Because the transition divides the bit into 2 parts the term half bit will be used in the explanation that follows The data sent on the system cable is a 4 level signal Refer to the system documentation for a further explana...

Page 128: ...01112131415 Bit Synchro nization 1000lpI1 11x x x x x x x xl11 100 olpl lx x x x x x x xl1100011111 1 1 11 ______________ ______________ L J _ _I w Last Frame Additional First Frame Frame Bit Synchro nization Frames Synchro Note For scope procedures and pictures refer to the controller documentation The 16 bit frame carries 13 bits of information in each direction The fill bits always 000 serve as...

Page 129: ...ed from the printer 9 Acknowledges the last status transmission to allow new status to be sent If bit 9 is a 1 updated responses are made when they are available If bit 9 is a 0 the former response frames are resent except for real time status which is always at the latest level Read Status 1000 1000 initiates the transfer from the printer of one status word that contains information about the con...

Page 130: ...ing the read status command Bits 11 12 and 13 Bits 11 12 and 13 indicate exception status as follows Bit 11 12 13 Meaning 0 0 0 No exception status 0 0 1 Activate lost parity 0 1 0 Invalid activate command 24 0 1 1 Not used 1 0 0 Invalid command or device ID 20 1 0 1 Input queue or storage overrun 22 0 Not used Power on transition 08 Bit 14 By analyzing bit 14 the controller determines whether the...

Page 131: ... lo 1 21314 5 617 8 9 r II Fill Parity I Printer Address or EOM Wire Check 31 41 Slow Speed Check 42 Fast Speed J Check 33 43 4 10 Emitter Pulse Sequence Check 34 44 5 11 6 12 7 8 13 14 151 11 Syn Bit Forms Position Che ck 38 48 Forms Stopped 37 47 Overrun Error 36 46 No Emitter Pulses 35 45 1 Displayed when the Status switch is set to the Test position Refer to 193 for more information about stat...

Page 132: ...e print position to the first position on the line and moves the form to the next line same as NL Logically moves the form to the next line Does not move the print head Moves the forms to the first line of the next page and the print head to the first print position A no operation No character is printed and no function is performed in the printer Turns the Ready light off and the Attention light ...

Page 133: ...raphic Option 2BCB 00 01 2BC8 01 1 2BCB 02 GG GG I 01 2BCB 03 GG 01 or 00 GG I 01 2BC8 03 GG 03 GG I 03 2BC8 03 GG 05 FF GG I 01 2BC8 04 GG 01 Error Status Invalid SCS parameter Invalid SCS parameter Invalid SCS parameter llf GG is unprintable including characters in the EBCDIC control code quadrant a hyphen H is printed Set Horizontal Format Summary Set horizontal format defines the line length w...

Page 134: ...ormation about the printer adapter cable adapter commands and parameters are returned to the controller Before a set mode command is received after a power on reset only poll response frame 1 is returned Write Data Controller Poll Response Frames 1 and 21 I I I Poll2 Printer Poll Response Frames 1 and 2 with not busy and no exception bits active Active Write Data A write operation is initiated by ...

Page 135: ...e is installed addresses ranging from 000 through 110 are set by the customer When the address is received recognized and a response is returned polling is complete An address of 111 is invalid Data to be transmitted to the controller is moved from read write storage through a serializer deserializer serdes register and onto the cable under control of the cable adapter Data that is received is mov...

Page 136: ...ed into 2 major parts a data buffer area and an I O device control area The data buffer area is composed of two 256 byte receive buffers and two 132 byte print buffers The receive buffers are used by the cable adapter for storing up to 1 complete block of input data from the controller One buffer holds data being formatted for printing while the other receive buffer is accepting data from the cont...

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Page 138: ... I ROS for __ J controls I Micropro I cessing Unit I I I I Address I Decode I I O Control and Register I 2 Receive Select I Buffers I 2 Print I Buffers 1 _ _ _ _ _ J Timing Circuits momentary contact switches However the Status switch positions are stored in latches The Line Spacing switch position is not stored in a latch Latching is required for the Status switch positions to determine if the sw...

Page 139: ...rint emitter 2 as the first active pulse it could be any of the 3 pulses depending on where the print emitter pickup is aligned with the print emitter Print emitter pulses are sent to the adpater to indicate 0 25 mm 0 010 inch of print head travel along the print line 4 18 Objective To start print head motion from the left margin print an A in character position 1 and print a 8 in character positi...

Page 140: ...I Print Wires I I I I I I 1 These lines are shown for reference only Timing relationship among their active and inactive states and all other signals in this chart will vary What is important however is 1 this chart show that print head motion is co ntinuous throughout printing and 2 timing relationship among left margin print emitter pulses and print wire magnet pulses does not vary Theory Featur...

Page 141: ...r is on too long The left margin and print emitter 1 2 and 3 signals so the adapter can determine the position of the print head and the direction it is moving A signal forms emitter A and 8 that determines how far the forms have moved A signal end of forms that forms are not present 4 20 POWER ON AND POWER OFF TIMINGS The figure below shows the power on and power off timings The printer ready lin...

Page 142: ... at I I I It least 1 microsecond after the I I I I I printer ready line is active I Reset If I I I I I I I r Printer Ready __ I _ I 200 ms or Less Less Than I 2 Seconds I I Wire Check l End of Forms I Jl 1 These voltages are developed within printer power supply board A1 2 These voltages are developed on power adapter board C1 Theory Features Theory 5256 MIM 4 21 ...

Page 143: ...at plug into a printed circuit board located at the rear of the printer Print Emitter Print Wire Amplifiers and Drivers Left Margin See the note Amplifier Pulse Counter Print and Matrix Logic Generator Common Control Logic J I 0 c I c Forms Feed Stepper Motor i 1 l I 0 1 Jl V I U U Lr 4 Carrier Stepper Motor Drivers See the note Carrier Stepper Motor Logic I 4 Forms Feed Forms Feed Stepper Motor E...

Page 144: ...l lines The direction the motor turns is determined by the sequence of the control pulses each time the phases are shifted the motor shaft rotates 2 degrees The timing chart shows the sequence of pulses to step the motor counterclockwise The combination of the not A line and not B line at the end of the sequence holds the motor detented during settle time in the example below Note that the motor c...

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Page 146: ...gibility and reducing ribbon smudging when using multiple part forms As required by the character pattern each wire can strike the ribbon up to 4 times per character for example print wire 5 when printing the character A Note that the character pattern is determined by the bits that are on in the character generator Print wires are not fired at successive emitter pulses because time is required to...

Page 147: ...n on any of the 4 active carrier driver conditions A and 8 not A and 8 not A and not 8 A and not 8 but the active start condition must be the same as the previous settling time 4 26 To advance the stepper motor clockwise and move the print head left to right the carrier predrivers are turned on and off in sequence as shown Up to speed motor advance pulses are 3 27 ms apart at 40 and 80 cps At this...

Page 148: ...equence can start on any of the four conditions I I I Settle time for I the next opera tion can start herel 1Start and stop sequence Settle time after power on and before power off is 50 ms minimum Settle time after a print operation with drivers still active can be 35 ms minimum if the next operation follows immediately Settle time during forms movement is 50 ms to 100 ms normally 150 ms maximum ...

Page 149: ...0ms I I I I I I I 2 8 ms I I I I AI I I I I l I I Be l Bl l l 1 Start and stop sequence Printing must be completed by this time _ I r Settle time for the next Settle time after power on and before power off is 50 ms minimum This sequence can start on any of the four conditions I Settle time after a print operation is 50 ms minimum Settle time during forms movement is 50 ms to 100 ms normally 150 m...

Page 150: ... motor advance to the left of left margin ________ The left margin could become active I at any time I Moving Right to Left If the print head is to be retracted vhe normal stop sequence begins here I To retract the print head the IfooII t I normal stop sequence begins i Normal Stop Sequence I I I after 40 emitter pulses I I I I 1 I I 14 0 mS 1 17 0 ms 1 50 ms to 100 ms 1 settle time 2 1 1___ _____...

Page 151: ...arts A normal start sequence begins the operation Then the carrier stepper motor advance pulses are gradually increased to a 2 15 ms rate High Speed Movement from Stop Tab or Skip Operation for 40 cps and 80 cps Printers Start sequence begins here MOVing Right to Left Start of high speed return sequence begins here I up to speed advances There are five I J 2 15 ms I 3 27 ms steps I 12 6 1 1 J 3 0 ...

Page 152: ... t I I 3 27ms 1 I 1 1 I I I I I I I I A l L I J Carrier A 1 Drivers l B B Print Wire Timing The figure shows dots being printed from right to left and left to right at 40 cps 80 cps and 120 cps If the print head is moving to the right the dots will be printed to the right of the position where the print emitter pulse occurred To print to the left on the next line and align the dots vertically or t...

Page 153: ...art when ptinting and are active for of print head travel approximately 0 76 mm regardless of time 0 003 inch of print head 1 2 3 2 3 travel Print Emitter Pulses r J L ____ L _ _ _ ___ L _ _ _ J ___ J ___ I _ J I I I I I Solenoid fires here r i Solenoid fires here Printing Left to Right 0It0 Printing Right to Left Print wire strikes hV V t wire strikes here Printing at 120 Characters per Second F ...

Page 154: ...nd ribbon box II horizontally along the print line The print head carrier is moved by the drive belt II coupled to the print head motor II Print head movement slides the print emitter pickup along the print emitter II to produce print emitter pulses Theory Features Theory 5256 MIM 4 33 ...

Page 155: ... emitter winding The null position occurs at the maximum misalignment of the land patterns of the print emitter and land patterns of the print emitter pickup When the print emitter pickup is moved left or right land patterns II and II each produce an output pulse every 0 762 mm 0 030 inch of print head travel When the pulses from the 3 circuits are ORed a pulse is produced 4 34 every 0 254 mm 0 01...

Page 156: ...cuits Moving Left to Right The number of print emitter 1 2 and 3 pulses depends on how far the print head is into left marg Printing starts in character pOSition 1 on the next print emitter 3 pulse after the left margin line goes inactive I 0 76mm I 0 030 inch Print Emitter 1 I Print Emitter 2 Print Emitter 3 1 I I 1 ___ 0 25 mm t T L L l __ J 0 010 inch I I I 0 25mm t l J L JL I il 1 J 0 010 inch...

Page 157: ...print head ribbon box and ribbon drive mechanism are mounted on the carrier and move left to right under control of the carrier motor The ribbon feed rolls are driven by 2 lines II through a series of idler gears The lines are looped around a double clutch D located underneath the carrier that drives the ribbon feed rolls The clutches drive in 1 direction and free wheel in the other The lines are ...

Page 158: ...ted on the right end of the platen When the end of the form is 50 8 mm 25 4 mm 2 inches 1 inch from the line being printed the End of Forms switch II closes and signals the adapter The switch operates only when the Paper Release lever II is in the forward position The switch is used when feeding continuous forms Theory Features Theory 5256 MIM 4 37 L ...

Page 159: ...e photocells to a TTL logic level The signals from the printer to the adpater are forms emitter A and forms emitter B k 4 I I I I 4 38 As the forms motor rotates the forms feed emitter produces 1 pulse for each 2 degrees of rotation For every 16 pulses the paper advances 1 line at 6 lines per 25 4 mm 1 inch For every 12 pulses the paper advances 1 line at 8 lines per 25 4 mm 1 inch These pulses si...

Page 160: ...lue previously stored These matches are counted and the count is used for stopping the motor for 6 or 8 lines per inch spacing Stopping after a count of 4 produces the 6 line spacing Stopping after a count of 3 produces the 8 line spacing The MPU sets up the forms control logic so that if the motor has been moved 2 or more motor phases by paper tension or the operator a forms check is signaled and...

Page 161: ...ng for 1 forward space at 6 lines per 25 4 mm 1 inch 1 1 16 phase shifts 1 space at 6 lines per inch I Timing for space operation begins here For multiple line spacing I sequence continues from here I 1 1 0 ms Pre stop Time A B A A Forms Drivers 8 I I I I A print operation can start here see the note I I 1 50 ms Settle Time for Stop Power Off I I l l I 1 l l t l l i i B l Note Printing starts with...

Page 162: ...n top of the printer frame and can be removed to use cut forms The right tractor is adjustable to handle forms from 76 20 mm to 381 00 mm 3 inches to 15 inches wide the left tractor is adjustable to position the forms Adjusting the Right Tractor Installing the Forms Tractor Unit Theory Features Theory 5256 MIM 4 41 ...

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Page 164: ...asic printer has planar board jumpers that connect terminating resistors into the circuit The basic printer a ways has an address of 000 whether it is connected to a port or is the last device in a Cable Thru series The Cable Thru feature is available only with twinaxial cable Up to seven work stations can be connected in a series Addresses range from 000 to 110 Address 111 is invalid and will cau...

Page 165: ...ide of the switch Address Switch Setting O Invalid 7 5 2 AUDIBLE ALARM This feature is connected in parallel with the Attention light The alarm produces a tone that alerts the operator to conditions requiring operator intervention The alarm is located on the right rear or the printer viewed from the front and is supplied with a volume regulator ...

Page 166: ...s approximately 35 kilograms 78 pounds NEVER LIFT IT BY YOURSELF This setup procedure is written in two sections The steps in Section 1 can be completed without connecting your printer to the system The steps explain how to set up the forms feeding equipment how to use printer controls and how to do a print test The steps in Section 2 explain how to connect the printer to the system and how to use...

Page 167: ...lose the top cover A 2 o 4 Remove and untape the power cord DO NOT plug the power cord into a power outlet o 5 Open the small carton Remove and save the documentation and any additional items included Place the documentation that is enclosed in a plastic envelope in the slot at the rear of the machine Remove the end pieces packing material and remove the forms tractor from the box I I I I I I I ...

Page 168: ...ms tractor toward the front of the printer until the front legs move into locking position 07 d Check the final placement by making sure the Paper Advance knobs turn freely and the tractor pins move To insert forms into the printer use the following steps a If your printer has a forms stand place the stand on the floor behind the printer A box of forms can be placed under the forms stand shelf For...

Page 169: ...nS Soac n SI us 8 8Cancel ounl Normal Chrck hu A 4 o 10 Remove the wax string seal from the plug and plug the power cord into a grounded outlet o 11 Set the Power switch to the On position If you have trouble with the lights switches or the print test in Section 1 do not go to Section 2 Instead refer to Chapter 5 Problem Determination in the IBM 5256 Printer Operator s Guide GA21 9260 The Power On...

Page 170: ...n when the switch is pressed Stop The Ready light should go off and the print head should move to the left margin area when the switch is pressed The Power On light remains on o 13 To perform a print test make sure you have paper loaded in the printer a Set the Status switch to the Test position the Data Cleared and Transparent Mode lights go off 4 OSlorage Check 5 Olntern 1 Check oAnention oForms...

Page 171: ...VWXYZ 0123456789 I S X_ 7 I abcdefghi jkLffinoP r I stuvwXyZ ABCDEFGHI JKLMNOPQR STUVWXYZ 0123456789 I I X_ I abcdefghi jkLffinoP r I stuvwxyZ ABCDEFGHI JKLHNOPQR STUVWXYZ 0123456789 I S I X_ I abcdefghi jkLffinoP r I stuvWXyZ ABCDEFGHI JKLMNOPQR STUVWXYZ 0123456789 I S I X_ I abcdefghi jkLffinoP r I stuvwxyZ ABCDEFGHI JKLMNOPQR STUVWXYZ 0123456789 e Press the Stop switch to stop printing and to t...

Page 172: ...to station The switch has two positions Position 2 allows communications signals to flow through the station to the next station Position 1 stops the communications signal and completes the electrical circuit Position 1 is the required position when the station is the last one on the line station C in the example Rear Access Panel Station C Audible Alarm Volume Control 1h rf5 Group of Three t Addr...

Page 173: ...erminator switch on the other station is set to position 2 o 16 Set the Power switch to the Off position o 17 To connect the system cable to the printer Note When you connect cables be sure to line up the slot inside the cable connector with the key in the socket A a The system cable connects to a socket on the rear access panel on the back of the printer The rear access panel resembles either ill...

Page 174: ...ht find the eraser end of a pencil convenient to use when setting these switch s b Set the Terminator switch to position 1 I o Terminator Switch o 19 The following checkout procedure ensures that the 5256 Printer is properly set up and communicating with the system a Make sure the Status switch is set to the Normal position 4 5 O stor Olntemel eck Check oAttention oForms O Unit Check Un Spacing 8 ...

Page 175: ...wer on UOff power On Ready 1 eLine sYnc Line Stop Start Feed B B B 2 System Available Form Feed B When step 19 is completed successfully your printer is properly set up and communicating with the system Refer to Chapter 1 Introduction in the IBM 5256 Printer Operator s Guide GA21 9260 for further information If step 19 is not successful refer to Problem Check List on the next page A 10 ...

Page 176: ...f your printer is connected to a preceding station not connected directly to the system make sure the blue Terminator switch on the preceding station is set to position 2 4 If your printer is not connected to a following station no cable in socket 2 be sure the Terminator switch if there is one is set to position 1 Stations without a Terminator switch can only be used as the last station on the li...

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Page 178: ...r C1A1 1 9 control panel cable 1 10 external system cable 1 10 front and right side 1 2 internal system cable 1 10 planar board B1 locations and jumpers 1 8 planar interface cable 1 10 power adapter board C1 locations 1 9 power supply board A 1 locations and jumpers 1 7 printer mechanism base locations 1 6 printer mechanism bottom locations 1 5 secondary AC cable 1 10 cabling locations and station...

Page 179: ... 2 electronics and power 1 57 emitter forms feed 4 38 in left margin 4 35 pickup 4 22 4 34 print 4 22 4 34 emitter and forms motor removal and replacement 1 23 emitter forms feed emitter disk adjustment 1 25 emitter print emitter board removal and replacement 1 38 emitter printer emitter pickup amplifier removal and replacement 1 37 end of forms switch 4 37 end of forms switch adjustment 1 30 end ...

Page 180: ...stment 1 18 platen latches release eccentrics and springs adjustment 1 18 platen pressure rolls adjustment 1 19 removal and replacement 1 17 forms thickness control see copy control dial forms tractor unit chain cover service check 1 33 forms tractor unit chain removal and replacement 1 35 forms tractor unit disassembly and assembly 1 32 forms tractor unit removal and replacement 1 32 forms tracto...

Page 181: ...ing analysis procedure ERAP 1 83 field definition of error history table sample printout 1 88 matrix printer verification test online exerciser 1 82 X 4 online tests continued matrix printer verification test printout online exerciser 1 86 online exerciser matrix printer verification test printer 1 86 overview 1 81 operation command 4 8 reset 4 21 overview of printer operation data flow 4 2 panel ...

Page 182: ...tor gear backlash play adjustment 1 21 print head adjustment continued forms motor to emitter timing adjustment 1 27 left margin service check 1 38 left tractor 1 33 platen gear backlash play adjustment 1 20 platen gears and bushing removal replacement adjustment 1 18 platen latches release eccentrics and springs adjustment 1 18 platen pressure rolls adjustment 1 19 print emitter board to pickup a...

Page 183: ...plugs P2 P3 P4 and P5 1 97 reset operation 4 21 response frame read status response frame 4 10 X 6 response frames poll 4 9 4 9 read status 4 1 0 responses 4 13 poll 4 13 retract print head 4 29 retract ramp adjustment 1 51 ribbon box and cover removal and replacement 1 54 ribbon changing 1 55 ribbon drive 4 36 ribbon drive clutches removal and replacement 1 52 ribbon drive gears removal and repla...

Page 184: ...ilter continued control panel 1 13 copy control dial removal and replacement 1 51 end of forms switch 1 30 fan B1 removal and replacement 1 60 fan B2 removal and replacement 1 60 fan removal and replacement 1 60 forms guide rack static eliminator replacement 1 35 forms motor and emitter removal and replacement 1 23 forms tractor unit 1 32 forms tractor unit chain removal and replacement 1 35 front...

Page 185: ...nd of forms switch 1 30 fan Bl removal and replacement 1 60 X 8 transistor Q1 service check continued fan B2 removal and replacement 1 60 forms motor and emitter removal and replacement 1 23 forms tractor unit 1 32 forms tractor unit chain removal and replacement 1 35 front cover 1 12 paper deflector and platen removal and replacement 1 17 planar board Bl removal and replacement 1 67 platen and pa...

Page 186: ...ntout in transaction 1 87 verification test printout matrix printer online exercise 1 86 vertical format 4 13 wire check in read status response 4 10 wiring diagram for printer 1 68 work register 4 15 work station attachment 4 7 write activate command 4 8 write control data command 4 8 write data 4 13 write data command 4 8 Index X 9 ...

Page 187: ...X 10 ...

Page 188: ...graphical illustration and so on No reply Page Number Error Note A comments and suggestions become the property of IBM No postage necessary if mailed in the U S A Inaccurate or misleading information in this publication Please tell us about it by using this postage paid form We wi correct or clarify the publication or tell you why a change is not being made provided you include your name and addre...

Page 189: ...tions Dept 245 Rochester Minnesota 55901 International Business Machines Corporation General Systems Division 4111 Northside Parkway N W P O Box 2150 Atlanta Georgia 30301 U S A only General Business Group International 44 South Broadway White Plains New York 10601 U S A International Fold FIRST CLASS PERMIT NO 40 ARMONK N Y Fold o c l o J CCI r 5 CD II CD J II J n CD CD a 5 c en l en J 6 m I J 6 ...

Page 190: ...on General Systems Division 4111 Northside Parkway N W P O Box 2150 Atlanta Georgia 30301 U S A only General Business Group International 44 South Broadway White Plains New York 10601 U S A International SY31 0462 0 0 CD 0 CD 0 3 0 o 0 c a C I ...