OKIDATA OKIMATE 20, Technical Service Data

Page 1: ...15 COMPUTERFACTS Technical Service Data OKIDATA OKIMATE 20 MODEL EN3211 PRINTER FEATURES COMPLETE SCHEMATICS PRELIMINARY SERVICE CHECKS TROUBLESHOOTING TIPS EASY READ WAVEFORMS REPLACEMENT PARTS LISTS...

Page 2: ...Equipment REPLACEMENT PARTS AND DESCRIPTION F Fuse 2 Q1 Transistor Power Supply Board S i Br i dge Rect i f i er SW 0n 0ff Switch LI Coil R1 Resistor 5 1 Ohms 3W M7 Print Head 01 ROM IC Ml Line Feed M...

Page 3: ...holding motor assembly and remove assembly PAPER FEED MOTOR REMOVAL Remove Printer mechanism Disconnect Connec tor CN8 from Driver Board Remove two screws holding Paper Feed Motor and remove Motor BEL...

Page 4: ...6 and T PRINTER WILL NOT PRINT BY COMPUTER COMMAND A Check Connector CN2 on Interface Board B Check settings of DIP Switches SW1 and SW2 on Interface Board See Switch Settings for a list of the variou...

Page 5: ...PRELIMINARY SERVICE CHECKS Continued POWER SUPPLY BOARD Q1 SW2 8W1 CN2 x INTERFACE BOARD IV...

Page 6: ...PRELIMINARY SERVICE CHECKS Continued N f Mi II I t I m mmBmu 7 f CN3 CNS CN5 CN5 v 7 4 5V 0V SB 0 1NFSNITY 5 5V 0V PIN 1 CN7 CN7 CN9 14 6V D m ZO w t L m DRIVER BOARD...

Page 7: ...U2 Spanish Characters 1 2 ASCI I Characters 1 17 1 CP1 Characters per inch 2 10 CPI Auto LF linefeed On 3 4 Auto LF Off 3 4 IBM Character Set 1 IBM Character Set 2 4 5 Draft Quality 6 6 Correspondenc...

Page 8: ...ft sn en r s a V V V V V V ImAmj Mill K8 li a t i _i o cc 1 7 o o g si sTTT C r a o vHEIl J zi 5 5 01 UJ o fcl X fe D S DD D CD r Vn s 5 1 ill is o m z o i O I g Q CC o CD UJ o u_ a UJ s 0000flB p I H...

Page 9: ...nnectors and contacts DISK DRIVES Clean the read write heads of the Disk Drives about once a month or after 100 hours usage Use only an approved head cleaning kit Handle carefully to preserve proper d...

Page 10: ...z O to 1 OH 7s m to o SAMS Howard W Sams Co fr i 4300 West 62nd Street P O Box 7092 Indianapolis Indiana 46206 U S A The listing of any available replacement part herein does not constitute in any cas...

Page 11: ...A PHOTOFACT STANDARD NOTATION SCHEMATIC withhehubhi Howard W Sams Co 1987 OKIDATA MODEL EN3211 OKIMATE 20...

Page 12: ...S OVCB A PHOTOFACT STANDARD NOTATION SCHEMATIC with HEHffiEEBl Howard W Sams Co 1987 26 o D CO J s o D m m O 3 H m N5 O O 2 o...

Page 13: ...HIC R5 R3 R2 DRIVER BOARD 4 B C A Howard W Sams WrwmrEKHI Phoio 14 4V 9 0V 5 0V A O D m i m 2 O 1 OH m 8 DRIVER BOARD 25...

Page 14: ...0 GO o m m iV5 Q Pi m JO u A PHOTOFACT STANDARD NOTATION SCHEMATIC with QBHOoai Howard W Sams Co 1987 POWER SUPPLY...

Page 15: ...c M OU 8 Ji IT W J i S 5 r 0 M g frnvmrnmnrnrmi tn 6 Wr B V V 1 fs X d s fe I rwrwwwTT D o t CS Q I f ALTERNATE POWER SUPPLY A PHOTOFACT STANDARD NOTATION SCHEMATIC with NIMIIiimil Howard W Sams Cc 1...

Page 16: ...A PHOTOFACT STANDARD NOTATION SCHEMATIC with S0335E 59 Howard W Sams Co 1987 ALTERNATE POWER SUPPLY...

Page 17: ...nnnnnrinnn 34 C t 22 35 C a 21 36 a 3 20 37C 119 38 C 118 39d 3 17 40 C 116 41 1 pis 42 a 14 43 d o 13 44 C 12 uuuuuuuuuuu 2 3 4 5 6 7 8 910 11 Q3 Q4 TOP VIEW IC 323 2C 327 EC 330 It 25 Si CJ30 6C 223...

Page 18: ...to pin 5 of Connector CN9 Also connect a 30 ohms 10W load Resistor from pin 1 to pin 6 and a 10 ohms 10W load Resistor from pin 5 to pin 6 of Connector CN9 POWER SUPPLY DEAD Check Fuse F If fuse is o...

Page 19: ...4V is present check waveforms at pins B4 B8 B9 B10 A6 and A9 of Connector CN3 on Driver Board If waveforms are missing check inter face IC Q3 on Interface Board are present check waveform at Module H...

Page 20: ...ood check CPU IC Q6 and Interface IC Q4 LINE DEFINITIONS AOTHRU A15 Address BitsOThru 15 ACK Acknowledge Input Data Received ALE Address Latch Enable BUSY Busy Off Line Data Entry Paper Feed Printing...

Page 21: ...D CD CD CD O O O O O UJ UJ LU UJ UJ in CD CD O O LU LU ECG7 ECG2 ECG8 ECG9 ECG1 ECG5 ECG5 ECG3 d oo 00 00 1 NO W0 CN NO NO On On i o o in on on on z a Olf k i in on in NO CN Q in in t in P CN 00 on v...

Page 22: ...O K i 1_ o 4 K c U 3 a c CD c JD o D ra O _ 03 10 o c _ u 0 CO 3 a a c CD o CN V D C Id ai o S_ 2 L 1 co in _ CD O CM O O CM OJ T CM in m CD CO CD CD z z z z UJ UJ c a _i _i U UJ CD CO CD in L0 5 o o...

Page 23: ...KV 470 1KV ITEM RATING MFGR No PART No C 1 1000 25V 100 10V 330 25V C12 1000 25V 4 7 50V 10 50V CI 3 100 10V 47 35V 220 16V C14 330 25V 100 25y C15 47 10V C16 47 35V 100 25V i ITEM RATING MFGR No PART...

Page 24: ...4W Carbon Film 250 1 4W Carbon Fi Im 150 1 4W Carbon Film 1000 5 1 4W Carbon Fi Im 240 1 4W Carbon Film 2200 5 1 4W Carbon Film 10 5 1 4W Carbon Fi Im 39 5 1 4W Carbon Fi Im 51 5 1 4W Carbon Film 100...

Page 25: ...t Act ing POWER SUPPLY 2 Amp 9 125VAC Fast Acti ng MISCELLANEOUS ITEM No PART NAME MFG8 PART No NOTES CHASSIS Ml M2 M3 M4 M5 M6 M7 Motor Motor Solenoid Sensor Sensor Sensor Print Head Line Feed Carri...

Page 26: ...5 P 15 L 35 P 3 16 P 16 P 16 P 36 L 17 P P 17 H 37 H 18 P 18 P 18 P 38 L 19 P 19 P 19 L 39 H 20 L 20 P 20 40 H PIN IC PIN IC PIN IC PIN IC PIN IC PIN IC NO 04 NO Q4 NO 04 NO 05 NO 08 NO 06 1 H 21 P 41...

Page 27: ...I 1 Characters i 2 1 17 1 CPI Characters per inch 2 1 2 10 CPI 2 3 4 Auto LF linefeed On 3 3 4 Auto LF Off 3 3 4 IBM Character Set 1 4 5 IBM Character Set 2 4 5 Draft Quality 6 6 Correspondence Qualit...

Page 28: ...uctions Supply voltage maintained as shown at input Controls adjusted for normal operation Terminal identification may not be found on unit Capacitors are 50 volts or less noted unless Electrolytic ca...

Page 29: ...i i i I l T i l l I I i i i T i i i i i I r i i i i i I ElilOC0CSLJ Oli iO i yHQQlilOIB O Q O lU o o cMro mvoc o cN m oj 58QS8858855o5ooo558lj ji 8 5S8S 16 SS5K5555wU JSP59 c j cr oo to ur CM w 4 c so...

Page 30: ...i_5 O o rn r m ZO w ro 5 2 H m a o ui A Howard W Sams MhWIIIttMHa Photo POWER SUPPLY BOARD 21...

Page 31: ...i I i I I I I 1 i i O OO CQ L_ CO CQ 3CQU_U_Obu Q Q X CO li_ Q O 3 CO O CN N o _ SlM r iv ooooooooooooooQQljo So G O O SirtrcrQiceSarE toi h h S3 CJ j c en o 3 L S 3 00 m ft CM i V r l ftift r H V CD...

Page 32: ...A Howard W Sam HIWUIIttMa Photo INTERFACE BOARD 23...

Page 33: ...S CHASSIS OVERALL VSEW 24...

Page 34: ...HIC R5 R3 R2 DRIVER BOARD 4 B C A Howard W Sams WrwmrEKHI Phoio 14 4V 9 0V 5 0V A O D m i m 2 O 1 OH m 8 DRIVER BOARD 25...

Page 35: ...S OVCB A PHOTOFACT STANDARD NOTATION SCHEMATIC with HEHffiEEBl Howard W Sams Co 1987 26 o D CO J s o D m m O 3 H m N5 O O 2 o...

Page 36: ...ove two screws holding motor assembly and remove assembly PAPER FEED MOTOR REMOVAL Remove Printer mechanism Disconnect Connec tor CN8 from Driver Board Remove two screws holding Paper Feed Motor and r...

Page 37: ...ItJ II i i t 5 2 P o a o z CC u a BLOCK DIAGRAM 28...

Page 38: ...to damage semiconductor devices 9 This Computer is equipped with a grounded three pronged AC plug This plug must fit in to a grounded AC power outlet Do not defeat the AC plug safety feature 10 Perio...

Page 39: ...e _o cd 8 D 5 H oo I N O O oo tS D C T3 O D H2 o o o I O CO I 5 i c d S v Q s I o a r i On 1 5 Q o a Si 2 S g J S 5 Ja s S a a 5 r o o eg 5 3 3 a i r u H a w Sa o w 5 S I E e r 5 cu BE 0B a t 3 H O s...