Daewoo VCR MECHANISM UNIT, Service Manual

Page 1: ...S M No TMECHA Feb 2000 DAEWOO ELECTRONICS CO LTD http svc dwe co kr Service Manual VCR MECHANISM UNIT T MECHA DECK ...

Page 2: ...GRAM 5 3 PERIODIC MAINTENANCE AND SERVICE SCHEDULE 6 4 SERVICE SCHEDULE FOR THE MAJOR PARTS 7 5 JIGS AND TOOLS 8 6 DEASSEMBLY AND REPLACEMENT 10 7 MECHANICAL ADJUSTMENT 16 8 ADJUSTMENT OF THE TAPE TRANSPORTING SECTION 19 9 EXPLODED VIEW AND PARTLIST 25 ...

Page 3: ...S Y 3 FE HEAD 4 S SLANT POLE ASS Y 5 TENSION BAND ASS Y 6 S BRAKE ASS Y 7 S REEL TABLE 8 REEL BRKT TOTAL ASS Y 9 IDLER PLATE TOTAL ASS Y 10 T BRAKE ASS Y 11 FL RACK 12 RELAY LEVER 13 CAPSTAN MOTOR 14 LC BRKT ASS Y 15 PINCH LEVER TOTAL ASS Y 16 CAM GEAR 17 AC HEAD ASS Y 18 T SLANT POLE ASS Y 19 HEAD CLEANER fig1 1 ...

Page 4: ...3 ASSEMBLY DIAGRAM AND A S CONTINUED B Lower View 20 L LOADING ASS Y 21 R LOADING ASS Y 22 CONNECT PLATE 23 REEL BELT 24 LOADING RACK fig1 2 ...

Page 5: ...4 ASSEMBLY DIAGRAM AND A S CONTINUED 1 2 FRONT LOADING Assembly diagram 1 FL BRKT L 2 TOP PLATE 3 SAFETY LEVER 4 LOADING LEVER AS4 5 CST HOLDER AS 6 DOOR OPENER 7 SAFETY LEVER R 8 FL BRKT R fig2 ...

Page 6: ...5 2 Connector Pin Arrangement 1 Wire Diagram WIRE DIAGRAM ...

Page 7: ...ing section with a cloth soaked in alcohol E Routine inspection Perform maintenance and inspection as separately described depending on the period of time in use Refer to the table of 2 2 3 2 CLEANING AND LUBRICATION A Cleaning of Tape Transporting section and Driving section a Cleaning of Tape Transporting section The following parts should be cleaned after every 500 hours of use TENSION POLE S S...

Page 8: ...ssary Replace PERIODIC SERVICE TIME NAME 1000 2000 3000 4000 5000 DRUM TOTAL ASS Y CAPSTAN MOTOR L C BRKT TOTAL ASS Y REEL BELT IDLER PLATE TOTAL ASS Y REEL TABLE TENSION BAND ASS Y S T BRAKE ASS Y PINCH ROLLER ASS Y AC HEAD ASS Y FE HEAD REEL GEAR TOTAL ASS Y Note Even though the unit is not used frequently cleaning lubrication and replacement of the belt should be under taken every 2 years ...

Page 9: ...602V CHECKING OF THE TAPE DAEWOO TRANSPORTING SYSTEM 3 CASSETTE TAPE KT 300NV MEASUREMENT OF KOKUSAI KT 300RV REEL TORQUE 4 VHS SPINDLE TSH V4 MEASUREMENT OF HEIGHT GAUGE REEL HEIGHT 5 TENTELO METER T2 H7 UM MEASUREMENT OF TENTELO THE BACK TENSION FAN TYPE MEASUREMENT OF THE 6 TENSION METER BELOW 3KG PRESSING FORCE FOR THE PINCH ROLLER 7 DENTAL MIRROR CHECKING OF THE TAPE TRANSPORTING SYSTEM 8 DRI...

Page 10: ...9 JIGS AND TOOLS CONTINUED 2 Sketch of Jigs and Tools ALIGNMENT TAPE CLEANING TAPE 3 0 20 10 0 10 2 0 3 0 3 0 20 10 0 10 2 0 3 0 VHS SPINDLE HEIGHT GAUGE ...

Page 11: ... F L Assembly by moving the DOOR OPENER in the direction of arrow b Remove the 2 screw holding the TOP PLATE and sepa rate the CASSETTE HOLDER Ass y by moving the FL BRKT L and FL BRKT R in the direction of arrow Fig 3 2 c Separate the FL LIFT SPRING by twisting and dragging from FL BRKT R Fig 3 3 DEASSEMBLY AND REPLACEMENT NOTE Remove the FRONT LOADING Ass y in eject mode Fig 3 1 Removal of the F...

Page 12: ...ere is no damage on the surface of VIDEO HEAD and DRUM c Assembly step is the reverse way of deassembly DEASSEMBLY AND REPLACEMENT CONTINUED CAUTION Assemble the FRONT LOADING Ass y in the reverse step of deassembly Confirm that 2 bosses on the left side of the CASSETTE HOLDER Ass y are inserted in the groove on the left side of the top plate Insert 2 bosses on the right side of the CASSETTE HOLDE...

Page 13: ...n the HEAD connecting PIN b Separate the AC HEAD Ass y after unscrewing the screw DEASSEMBLY AND REPLACEMENT CONTINUED CAUTION Take care GUIDE ROLLER of S T SLANT POLE AS and SLANT POLE not to be stained with grease during assembly Refer to Fig 3 8 in assembly FIg 3 7 Deassembly of the LOADING RACK LOADING ASS Y and the SLANT POLE ASS Y FIg 3 8 Assembly of the L R LOADING AS and the LOADING RACK C...

Page 14: ...direction DEASSEMBLY AND REPLACEMENT CONTINUED CAUTION After the assembly of the PINCH LEVER TOTAL Ass y adjust the tape transmission section by refering to the chapter 5 There should be no pollution on the surface of PINCH ROLLER with grease or other foreign material Make sure if the end of the PINCH SPRING PINCH A is located at the end of trajectory of CAM GEAR B in assembly Refer to Fig 4 3 CAU...

Page 15: ...te the CAPSTAN MOTOR after the removal of 3 screw holding the capstan motor 11 Deassembly of the FE HEAD Fig 3 14 a Unscrew the screw and separate the FE HEAD from the MAINBASE DEASSEMBLY AND REPLACEMENT CONTINUED CAUTION After the assembly of TENSION BAND Ass y on the mainbase adjust the TENSION POLE location as shown in Fig 3 15 Avoid getting Grease Oil or Foreign substance on the FELT of the BA...

Page 16: ...w DEASSEMBLY AND REPLACEMENT CONTINUED CAUTION Take care not to deform the IDLER PLATE TOTAL Ass y when assembling and deassembling CAUTION In deassembly of the REEL BRKT TOTAL Ass y take care REEL BELT and REEL FELT not to be stained with Grease Oil or Foreign substance Deassembly of the IDLER Ass y should be precede the deassembly of the REEL BRKT TOTAL Ass y Check the operation of the REEL BRKT...

Page 17: ...e ending part A of the RELAY LEVER assembled on the CONNECT PLATE is aligned with the reference hole B of the MAINBASE as shown in Fig 4 2 c The end point A of PINCH SPRINGPING of the LEVER TOTAL Ass y should be located within the tra jectory B of the CAM GEAR Fig 4 3 MECHANICAL ADJUSTMENT FIg 4 1 Assembly reference between the FL RACK and the CAM GEAR FIg 4 2 Assembly reference between the RELAY ...

Page 18: ...wn in 20 seconds c Measure the BACK TENSION by using the TENTELO METER Refer to Fig 4 5 The result should be within the range of 20g 30g d If the BACK TENSION is out of the range change the position of the TENSION SPRING of repeat the process of 4 Adjustment of the position of the TENSION POLE Fig 4 6 MECHANICAL ADJUSTMENT CONTINUED FIg 4 4 Assembly reference between the LOADING RACK and the LOADI...

Page 19: ...ing button d Turn off the poser when the Mechanism is in the desired position 4 Adjustment of the position of the TENSION POLE Fig 4 6 a Place the Mechanical mode in the play mode Refer to the above section 3 Mechanical mode b Confirm that the TENSION LEVER is aligned with the datum hole of the MAINBASE c If the requirement b is not satisfied turn the BAND BRAKE ADJUST CAP clockwise or countercloc...

Page 20: ...oise or impact on the deck mechanise tape transporting section readjustment is required in adjustment of the tape tranmission section consut the following flow chart If any components shown in Fig 5 1 tape transporting section will be changed To readjust the change of tape transporting sec tion keep in mind and follow the following check points FIg 5 1 A schematic diagram of the tape transporting ...

Page 21: ...TOTAL ASS Y A C HEAD ASS Y PINCH LEVER TOTAL ASS Y S TGUIDEPOSTFLANGE A C HEAD AS ADJUSTMENT TILT ADJUSTMENT CLEANING AUDIOAZIMUTHADJUSTMENT A CHEADADJUSTMENT X POSITIONADJUSTMENT PLAYBACKPHASEADJUSTMENT LINEARITY ADJUSTMENT DRUM ENTRANCE EXIT ENVELOPE FINE TUNING REVIEW PLAY CHANGING OPERATION CHECK AUDIO AZIMUTH ADJUSTMENT AUDIOOUTPUTCHECK A CHEADTILT HEIGHTADJUSTMENT X POSITIONADJUSTMENT TRACKI...

Page 22: ... AZIMUTH SCREW until the maximum AUDIO output 9dBm 3dBm is obtained E Adjustment of the X POSITION Fig 5 4 5 5 a Connect the PATH ADJ FIXTURE to the PT01 on the MAIN CIRCUIT BOARD b Play back theALIGNMENT TAPE DN2 SP MONOSCOPE c Connect the S W pin and ENVE pin of the PATH ADJ FIXTURE with the SCOPE PROBE d Insert the adjustment bar in the AC HEAD ADJUST hole and adjust the X POSITION of the AC HE...

Page 23: ...TY Fig 5 7 a Connect the PT01 on the MAIN CIRCUIT BOARD with a PATH ADJ FIXTURE b Play back an ALIGNMENT TAPE DN 2 MONOSCOPE Signal c Connect the FIXTURE S W PULSE TEST PIN on the PATH ADJ CHANNEL 1 SCOPE PROBE d Connect the VIDEO OUT on the MAIN CIRCUIT BOARD with a CHANNEL 2 SCOPE PROBE 1V div e Adjust the VR CONTROL on the ADJ FIXTURE until the ENVELOPE signal is maximum while play back the ALI...

Page 24: ...heck whether the ENVELOPE waveform restore to its original form within 3 second when the REVIEW mode is changed to PLAY mode h If the requirement of g is not satisfied Check the run ning status of tape on the lower part of T GUIDE POST and adjust the S T GUIDE ROLLER precisely J Checking for the J AUDIO output waveform Adjustment of AC HEAD TILT Height a Connect the AUDIO output jack with an AUDIO...

Page 25: ...onnect theS W PULSE TEST PIN on the PATH ADJ FIXTURE with a CHANNEL 1 SCOPE PROBE d Connect the VIDEO OUT on the MAIN CIRCUIT BOARD with a CHANNEL 2 SCOPE PROBE 1V div e Check if the ENVELOPE is maximum when the VR CONTROL on the PATH ADJ FIXTURE is in CEN TER f If the requirement e is not satisfied readjust the X POSITION by referring to subitem E Adjustment of the X POSITION g Repeat the process...

Page 26: ...25 1 Exploded view of DECK Ass y Top View EXPLODED VIEW AND PARTS LIST fig1 2 fig6 1 ...

Page 27: ...26 2 Exploded view of DECK Ass y Bottom View EXPLODED VIEW AND PARTS LIST CONTINUED fig6 1 fig6 2 ...

Page 28: ...27 3 Exploded view of FL Ass y EXPLODED VIEW AND PARTS LIST CONTINUED fig6 3 ...

Page 29: ...28 D0040 D0020 D0050 D0010 D0060 D0070 D0040 fig6 4 EXPLODED VIEW AND PARTS LIST CONTINUED 4 Exploded view Drum Total Ass y ...

Page 30: ...D MONO NON HEADCLNER M1OOO 97PC0353D DECK TOTALAS DRN 8420 4HD MONO DLC M1OOO 97PC0361D DECK TOTALAS DRN 8421 4HD MONO DLC HEADCLNER M1OOO 97PC0299D DECK TOTALAS DRN 8600 4HD HI FI NON M1OOO 97PC0330D DECK TOTALAS DRN 8601 4HD HI FI NON HEADCLNER M1OOO 97PC0354D DECK TOTALAS DRN 8620 4HD HI FI DLC M1OOO 97PC0360D DECK TOTALAS DRN 8621 4HD HI FI DLC HEADCLNER M1OOO 97PC0365D DECK TOTALAS DRN 8230 H...

Page 31: ...FERRINGTOLISTOFDECKTOTALASS Y A0100 97SA318100 MAIN BASE AS T MECHA A0200 97SA316500 S SLANT POLE AS T MECHA A0300 97SA316600 T SLANT POLE AS T MECHA A0400 97S8101600 MOTOR CAPSTAN DMVCMC07DR A0400 97S8101600 MOTOR CAPSTAN NEW SANVIC A0500 97S3102000 SCREW TAPPTITE TT2 BIN P 2 6X7 MFZN A0600 97SA320500 AC HEAD AS HVMXB1000AK A0600 97SA326800 AC HEAD AS HVMXA1101A A0700 7051300611 SCREW MACHINE PAN...

Page 32: ... 7274300811 SCREW TAPPTITE TT3 RND 3X8 MFZN F L AS AF001 97SA261010 F LOADING AS T MECHA AF002 7274300611 SCREW TAPPTITE TT3 RND 3X6 MFZN A3000 97S0903910 PLATE TOP SECC T1 0 A3100 97S2401400 BRKT FL L SECC T1 0 A3200 97S2401500 BRKT FL R SECC T1 0 A3300 7274300611 SCREW TAPPTITE TT3 RND 3X6 MFZN A3400 97S3008800 SPRING FL LIFT SWPB D0 8 A3500 97S2622700 LEVER DOOR OPENER POM F20 03 BLACK A3600 97...

Page 33: ...K AD001 97PA272071 DRUM PRICE AS CYN T312 4HD HI FI NON PAL AD001 97PA265871 DRUM PRICE AS CYP KT112 2HD SP ONLY DLC AD001 97PA269901 DRUM PRICE AS CYP KT110 2HD SP ONLY NON AD001 97PA265971 DRUM PRICE AS CYP KT212 2HD SP LP DLC AD001 97PA270001 DRUM PRICE AS CYP KT210 2HD SP LP NON AD001 97PA266071 DRUM PRICE AS CYP KT412 4HD MONO DLC AD001 97PA270101 DRUM PRICE AS CYP KT410 4HD MONO NON AD001 97...

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