Daewoo K-MECHA DECK, Technical & Service Manual

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Page 2: ...ENTS 1 MECHANISM DESCRIPTION 2 2 ASSEMBLY DIAGRAM MAJOR PARTS CHECK 5 3 DISASSEMBLY AND REPLACEMENT 12 4 MECHANICAL ADJUSTMENT 22 5 ADJUSTMENT OF TAPE TRANSPORTING SYSTEM 27 6 EXPLODED VIEW AND PARTS LIST 37 ...

Page 3: ... K MECHA DECK is operated by 7 MODES EJECT INITIAL REV IDLE PLAY STOP SLOW BRAKE FF REW 6 K MECHA DECK reduces the mode shifting time that is picture playing time by using the FULL LOADING SYSTEM that has the DRUM wrapped by the tape 7 K MECHA DECK is seperated from the Main PCB When assembling it is connected by B B TYPE CONNECTOR The CAPSTAN MOTOR and DRUM MOTOR of K MECHA DECK and the MAIN PCB ...

Page 4: ...3 1 2 1 WIRE DIAGRAM 1 2 WIRE DIAGRAM ...

Page 5: ...A 4 HEAD HI FI 1 SP L 2 COMMON 3 SP R 4 GND 5 EP R LP R 6 COMMON 7 EP L LP L 8 A R 9 COMMON 10 A L CN D 1 CTL 2 CTL 3 AUDIO 4 AUDIO 5 ERASE 6 GND CN 2 1 EVER 5V 2 CAPSTAN F R 3 CAPSTAN FG 4 CTL REF 5 CTL 6 I LIMIT 7 CAPSTAN M T 12V 8 GND 9 IC GND 10 NON CONTACT CN B 1 FE HEAD 2 GND CN 1 1 DRUM M T 12V 2 DRUM SPP CTL 3 DRUM PG 4 NON CONTACT 5 GND 6 DRUM FG CN A 2 HEAD Hi Fi 1 A R 2 COMMON 3 A L 4 G...

Page 6: ... S SLANT POLE ASS Y 4 TENSION BAND ASS Y 5 REEL TABLE 6 MAIN BASE ASS Y 7 S SUB BRAKE ASS Y 8 S MAIN BRAKE ASS Y 9 IDLER PLATE TOTAL ASS Y 10 T MAIN BRAKE ASS Y 11 T SUB BRAKE ASS Y 12 RELAY LEVER 13 CAPSTAN MOTOR 14 PINCH LEVER TOTAL ASS Y 15 L C BRKT TOTAL ASS Y 16 CAM GEAR 17 A C HEAD TOTAL ASS Y 18 T SLANT POLE ASS Y 19 DRUM TOTAL ASS Y 20 RECORD SAFETY LEVER ...

Page 7: ...6 B BOTTOM VIEW 1 CAPSTAN MOTOR 2 F L RACK 3 CONNECT PLATE 4 REEL BELT 5 REEL GEAR TOTAL ASS Y 6 RECORD SAFETY LEVER 7 L LOADING ASS Y 8 R LOADING ASS Y 9 DRUM TOTAL ASS Y 10 LOADING RACK ASS Y ...

Page 8: ...7 2 1 2 PARTS LOCATION OF FRONT LOADING ASS Y A TOP VIEW B FRONT VIEW ...

Page 9: ...h soaked in alcohol E Routine inspection ƒ Perform maintenance and inspection as separately described depending on the period of time in use ƒ Refer to the table of 2 2 3 2 2 2 CLEANING AND LUBRICATION A Cleaning of Tape Transporting section and Driving section a Cleaning of Tape Transporting section ƒ The following parts should be cleaned after every 500 hours of use ƒUTENSION POLE ƒUS SLANT POLE...

Page 10: ... 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 T SUB BRAKE ASS Y TENSION BAND ASS Y S MAIN BRAKE ASS Y T MAIN 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 undertaken every 2 years ...

Page 11: ...HECKING OF THE TAPE DAEWOO TRANSPORTING SYSTEM 3 CASSETTE TAPE KT 300NV Ø MEASUREMENT OF KOKUSAI KT 300RV REEL TORQUE 4 VHS SPINDLE TSH V4 Œ MEASUREMENT OF HEIGHT GAUGE REEL HEIGHT 5 TENTELO METER T2 H7 UM º 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 DRIVE...

Page 12: ...11 2 3 2 SKETCH OF JIGS AND TOOLS ALIGNMENT TAPE Ø º CLEANING TAPE Ł 3 0 20 10 0 10 2 0 3 0 3 0 20 10 0 10 2 0 3 0 VHS SPINDLE HEIGHT GAUGE Œ 8 1 8 2 8 3 ...

Page 13: ...PLACEMENT 3 1 FRONT LOADING ASS Y REMOVAL SeeFig 3 1 a Remove 2 screws fixing THE FRONT LOADING ASS Y NOTE The FRONT LOADING ASSEMBLY can be removed only in the eject position 12 A0400 Fig 3 1 FRONT LOADING ASS Y SEPARATION ...

Page 14: ...CKET R in the direction of arrow to separate it from the TOP PLATE and CASSETTE HOLDER ASSEMBLY b Remove the CASSETTE HOLDER ASSEMBLY Fig 3 2 c Remove one screw holding the PRISM LINK R and remove the PRISM LINK R from the F L BRACKET R Fig 3 3 Fig 3 2 DISASSEMBLY OF THE FRONT LOADING ASS Y Fig 3 3 DISASSEMBLY OF THE F L BRKT R ...

Page 15: ...EVER ASSEMBLY by pressing the connected section of the loading lever assembly in the directions of the arrows Fig 3 5 g Remove the SAFETY SPRING between the SAFETY LEVER and the CASSETTE HOLDER PLATE Fig 3 5 h Remove the RELEASE SPRING between the RELEASE LEVER and the SAFETY LEVER R Fig 3 5 Fig 3 4 DISASSEMBLY OF THE TOP PLATE Fig 3 5 DISASSEMBLY OF THE CASSETTE HOLDER ASS Y ...

Page 16: ...M ASS Y EARTH BRACKET ASS Y REMOVAL See Fig 3 7 a Remove three screws fixing the DRUM TOTAL ASSEMBLY b Remove the EARTH BRACKET ASSEMBLY Ł c Carefully lift the DRUM TOTAL ASSEMBLY Ø from the DECK MECHANISM taking care not to damage or touch the VIDEO HEAD NOTE ƒUAfter assembling the DRUM TOTAL ASSEMBLY confirm that the TAPE runs smooth and refer to chapter 5 ADJUSTMENT OF THE TAPE TRANSPORTING SYS...

Page 17: ...and by pulling them in the directions of the arrows CAUTION ƒUTake care not to get the GUIDE ROLLERS of the S T SLANT POLES stained with GREASE ƒUWhen reassembling refer to Fig 3 9 Fig 3 8 REEL BELT LOADING RACK ASS Y R L LOADING ASS YS S T SLANT POLE ASS Y REMOVAL LOADING GEAR R LOADING GEAR L LOADING RACK CIRCULAR MARK ON LOADING GEAR R NOTCH IN LOADING GEAR R HOLE OF LOADING RACK TRIANGLE MARK ...

Page 18: ...UTH SCREW and TILT SCREW with LOCKING PAINT Fig 3 10 DISASSEMBLY OF THE AC HEAD ASS Y 3 6 L C BRACKET ASS Y REMOVAL See Fig 3 11 a Remove one screw from the L C BRACKET ASSEMBLY Ł b Remove the L C BRACKET ASSEMBLY Ł from the MAINBASE 3 7 PINCH LEVER TOTAL ASS Y REMOVAL See Fig 3 11 a Remove one POLY WASHER Øfrom the PINCH LEVER POST of the MAINBASE b Unhook the PINCH LEVER SPRING Œfrom the hook of...

Page 19: ... MAIN SUB BRAKE ASS Y REMOVAL See Fig 3 14 a Unhook the MAIN BRAKE SPRING from the T MAIN BRAKE LEVER Øand remove the T MAIN BRAKE ASSEMBLY Ø b Remove the S MAIN BRAKE ASSEMBLY Ł from the MAINBASE c Unhook the S SUB BRAKE SPRING Œfrom the MAINBASE and remove the S SUB BRAKE LEVER ASSEMBLY ºfrom the MAIN BASE d Unhook the T SUB BRAKE SPRING from the MAINBASE and remove the T SUB BRAKE LEVER ASSEMBL...

Page 20: ... 3 16 NOTE ƒUAfter assembling the TENSION BAND ASSEMBLY on the MAINBASE adjust the position of TENSION POLE as shown Fig 3 17 ƒUAvoid getting GREASE OIL or foreign substance on the FELT of the BAND BRAKE ƒUTake care not to deform tab A when separating it Fig 3 15 TENSION BAND ASS Y REMOVAL DATUM HOLE OF MAINBASE DATUM HOLE OF TENSION LEVER Fig 3 17 ADJUSTMENT OF THE TENSION POLE POSITION Fig 3 16 ...

Page 21: ...TOR a Remove one POLY WASHER from the REEL GEAR POST Łand remove the IDLER PLATE TOTAL ASSEMBLY Øfrom the MAIN BASE b Remove the S T REEL TABLES Œand two POLY SLIDERS ºfrom the DECK MECHANISM Fig 3 18 CAPSTAN MOTOR REMOVAL Fig 3 19 IDLER PLATE TOTAL ASS Y S T REEL TABLES REMOVAL CAUTION ƒU When disassembling or assembling the IDLER PLATE TOTAL ASSEMBLY take care not to bend it ...

Page 22: ... it in the direction of the arrow Fig 3 20 FE HEAD REMOVAL Fig 3 21 REEL GEAR TOTAL ASS Y CONNECT PLATE REMOVAL NOTE ƒUWhen removing the CONNECT PLATE with the F L RACK installed take care not to damage or bend the CONNECT PLATE ƒUAfter assembling or disassembling the REEL GEAR TOTAL ASSEMBLY take care not to get OIL GREASE or other substances on the REEL BELT ƒUTake care not to deform or break ta...

Page 23: ... aligned with the DATUM HOLE in the MAINBASE in the EJECT mode as shown in Fig 4 1 b Make sure that part A of the RELAY LEVER when assembled in the CONNECT PLATE is fully rotated to the left side of B of the MAINBASE and is touching boss C of the MAINBASE as shown in Fig 4 2 CAM GEAR F L RACK DATUM HOLE OF CAM GEAR DATUM HOLE OF MAIN BASE Fig 4 1 DATUM POSITION OF F L RACK CAM GEAR Fig 4 2 DATUM P...

Page 24: ...ITCH are aligned with each other as shown in Fig 4 3 d Make sure that boss A of the PINCH LEVER TOTAL ASSEMBLY is positioned at point B of the CAM GEAR as shown in Fig 4 4 TRIANGLE MARKS MUST MEET EACH OTHER Fig 4 3 DATUM POSITION OF CAM SWITCH TRIANGULAR MARKS Fig 4 4 DATUM POSITION OF PINCH LEVER TOTAL ASS Y CAM GEAR ...

Page 25: ...ligned with those of the R LOADING ASSEMBLY so that the hole of the LOADING RACK ASSEMBLY aligns with the circular mark on the R LOADING ASSEMBLY as shown in Fig 4 5 R LOADING ASS Y B L LOADING ASS Y LOADING RACK ASS Y NOTCH IN R LOADING ASS Y CIRCULAR MARK OF R LOADING ASS Y HOLE OF LOADING RACK TRIANGULAR MARK ON L LOADING ASS Y A Fig 4 5 DATUM POSITION OF LOADING RACK ASS Y R L LOADING LEVER AS...

Page 26: ... between 25 and 33 grams d If the measuring result is not within this specification refer to the NOTE below or repeat 4 4 TENSION POLE POSITION ADJUSMENT Fig 4 7 DATUM HOLE TAPE Fig 4 6 BACK TENSION MEASUREMENT NOTE ƒU If the measuring result is not within the specification change the TENSION SPRING position To decrease the result choose hook A Otherwise choose hook B ƒUConfirm that all of the thr...

Page 27: ...esired position a MAKE MECHANICAL MODE be PLAY MODE Refer to 4 3 MECHANICAL MODE b Confirm that the datum hole of TENSION LEVER is aligned with the datum hole of the MAIN BASE c If requirement b is not satisfied turn the BAND BRAKE ADJUST CAP clockwise or counter clockwise until the two datum hole are aligned with each other 4 4 TENSION POLE POSITION ADJUSTMENT DATUM HOLE OF MAIN BASE DATUM HOLE O...

Page 28: ...TRANSPORTING SYSTEM S T GUIDE ROLLER HEIGHT ADJUSTMENT DRUM TOTAL ASS Y A C HEAD ASS Y PINCH LEVER TOTAL ASS Y S T GUIDE POST FLANGE A C HEAD AS ADJUSTMENT TILT ADJUSTMENT CLEANING AUDIO AZIMUTH ADJUSTMENT A C HEAD ADJUSTMENT X POSITION ADJUSTMENT PLAYBACK PHASE ADJUSTMENT LINEARITY ADJUSTMENT DRUM ENTRANCE EXIT ENVELOPE FINE TUNING REVIEW APLAY CHANGING OPERATION CHECK AUDIO AZIMUTH ADJUSTMENT AU...

Page 29: ...M has changed To prevent this it is essential to know thoroughly and observe the following INSTRUCTIONS A ADJUSTMENT OF THE S T GUIDE ROLLER a Play back a T 120 TAPE b Make sure that excessive TAPE wrinkle does not occur at each S T GUIDE ROLLER c If TAPE wrinkle is observed at the S T GUIDE ROLLER adjust them so that no wrinkle occurs ...

Page 30: ...EAD AZIMUTH SCREW to obtain the maximum audio output signal 9 3dBm D THE HEIGHT ADJUSTMENT OF A C HEAD a Play back a T 120 TAPE b Make sure that the gap is 0 25mm between the lower end of TAPE and that of A C HEAD c When the gap is longer than 0 25mm turn the A C HEAD HEIGHT ADJUST NUT counter clockwise When the gap is shorter than 0 25mm turn it clockwise Repeat this procedure untill 0 25mm is ob...

Page 31: ...n the VR CONTROL to the center point If the VR CONTROL is completly turned counter clockwise it is positioned on another tracking center f With the VR CONTROL in the center state turn the ADJUST BOSS by using FLAT TYPE SCREW DRIVER and adjust the X POSITION to obtain the maximum envelope waveform TEST POINTS S W PULSE TEST PIN PATH ADJ FIXTURE ENVELOPE TEST PIN PATH ADJ FIXTURE MEASURING EQUIPMENT...

Page 32: ...T TAPE COLOR BAR SIGNAL OR MONOSCOPE SIGNAL c Connect the channel 1 scope probe to the S W PULSE TEST PIN of the PATH ADJ FIXTURE d Connect the channel 2 scope probe 1V div to the VIDEO OUT of the MAIN CIRCUIT BOARD e Play back the ALIGNMENT TAPE f Adjust the PG volume for time interval of 6 5H 0 5H between switching pulse and V sync signal TEST POINTS S W PULSE TEST PIN PATH ADJ FIXTURE VIDEO OUT...

Page 33: ...T PIN of the PATH ADJ FIXTURE e Adjust the VR CONTROL of the PATH ADJ FIXTURE for maximum envelope signal output of the alignment tape f Adjust the S T GUIDE ROLLER until the envelope signal waveforms of the entrance and exit sides are as shown in Fig 5 7 TEST POINTS S W PULSE TEST PIN PATH ADJ FIXTURE ENVELOPE TEST PIN PATH ADJ FIXTURE MEASURING EQUIPMENT OSCILLOSCOPE ADJUSTMENT VR CONTROL PATH A...

Page 34: ... the S T GUIDE ROLLER TEST POINTS S W PULSE TEST PIN PATH ADJ FIXTURE ENVELOPE TEST PIN PATH ADJ FIXTURE MEASURING EQUIPMENT OSCILLOSCOPE ADJUSTMENT VR CONTROL PATH ADJ FIXTURE S T GUIDE ROLLER TAPE TRANSPORTING SYSTEM DRUM ENTRANCE DRUM EXIT QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ QQ...

Page 35: ...he REVIEW MODE about 15 secs change the REVIEW MODE to the PLAY BACK MODE g Change operation mode from REVIEW MODE to PLAY MODE and then make sure that the envelope waveform is restored to the maximum condition within 3 seconds h If the requirement is not satisfied make sure that the TAPE runs normal at the lower part of the T GUIDE POST Then adjust the S T GUIDE ROLLER precisely TEST POINTS S W P...

Page 36: ...d A C HEAD HEIGHT NUT to obtain the maximum audio output Fig 5 3 K A C HEAD AZIMUTH ADJUSTMENT a Connect the OSCILLOSCOPE to the AUDIO OUTPUT JACK b Play back the ALIGNMENT TAPE NTSC DN2 SP 7KHz PAL DP2 SP 6KHz c Adjust the A C HEAD AZIMUTH SCREW to obtain the audio output 9 3dBm Fig 5 3 d Repeat the process H DRUM ENTRANCE EXIT TEST POINTS AUDIO OUTPUT AUDIO OUTPUT JACK MEASURING EQUIPMENT OSCILL...

Page 37: ...r position When the VR CONTROL is completely turned counter clockwise it is set at another tracking center position f When the VR CONTROL is fully rotated clockwise or counter clockwise turn the ADJUST BOSS of the MAINBASE and adjust the X POSITION for the envelope waveform to be as shown in Fig 5 11 g Repeat the process F PLAYBACK PHASE ADJUSTMENT TEST POINTS S W PULSE TEST PIN PATH ADJ FIXTURE E...

Page 38: ...37 6 EXPLODED VIEW AND PA RTS LIST 6 1 EXPLODED VIEW OF DECK ASS Y TOP VIEW AC001 ...

Page 39: ...38 6 2 EXPLODED VIEW OF DECK ASS Y BOTTOM VIEW ...

Page 40: ...39 6 3 EXPLODED VIEW OF F L ASS Y ...

Page 41: ...40 ...

Page 42: ...DRN 7400 4 HD MONO NON DLC M1000 97PC0108D DECK TOTAL AS DRN 7401 4 HD MONO NON DLC HEAD CLNR M1000 97PB0892D DECK TOTAL AS DRN 7420 4 HD MONO DLC M1000 97PC0109D DECK TOTAL AS DRN 7421 4 HD MONO DLC HEAD CLNR M1000 97PC0063D DECK TOTAL AS DRN 7430 4 HD MONO DLC BK M1000 97PB0887D DECK TOTAL AS DRN 7600 4 HD HI FI NON DLC M1000 97PC0050D DECK TOTAL AS DRN 7603 HT 4 HD HI FI NON DLC M1000 97PC0110D...

Page 43: ... SP LP MONO DLC M1000 97PC0058D DECK TOTAL AS DRP 7321 2 HD HI FI DLC HEAD CLNR M1000 97PC0183D DECK TOTAL AS DRP 7322 2 HD HI FI DLC M1000 97PC0086D DECK TOTAL AS DRP7301 2 HD HI FI NON DLC HEAD CLNR M1000 97PC0072D DECK TOTAL AS DRP 7400 4 HD MONO NON DLC M1000 97PC0192D DECK TOTAL AS DRP 7401 4 HD MONO NON DLC HEAD CLNR M1000 97PC0073D DECK TOTAL AS DRP 7420 4 HD MONO DLC M1000 97PC0130D DECK T...

Page 44: ... DRUM PRICE AS CYN K210SQ 2 HD EP NON DLC SQPB AD001 97PA258971 DRUM PRICE AS CYN K212H HT 2 HD EP DLC AD001 97PA259041 DRUM PRICE AS CYN K213H HT 2 HD EP DLC BK AD001 97PA251801 DRUM PRICE AS CYN K410 4 HD MONO NON DLC AD001 97PA252471 DRUM PRICE AS CYN K412 4 HD MONO DLC AD001 97PA258541 DRUM PRICE AS CYN K413 4 HD MONO DLC BK AD001 97PA251701 DRUM PRICE AS CYN K610 4 HD HI FI NON DLC AD001 97PA...

Page 45: ...HD HI FI DLC AD001 97PA260501 DRUM PRICE AS CYP K310 2 HD HI FI NON DLC AD001 97PA253101 DRUM PRICE AS CYP K410 4 HD MONO NON DLC AD001 97PA253271 DRUM PRICE AS CYP K412 4 HD MONO DLC AD001 97PA253301 DRUM PRICE AS CYP K610H HT 4 HD HI FI NON DLC AD001 97PA253471 DRUM PRICE AS CYP K612H HT 4 HD HI FI DLC SECAM AD001 97PA253501 DRUM PRICE AS CYS K410 4 HD MONO NON DLC AD001 97PA253671 DRUM PRICE AS...

Page 46: ... A0100 97SA309700 MAIN BASE AS K MECHA A0200 97S0901400 PLATE CONNECY SECC T1 0 A0300 97S2701800 RACK F L PBT KP213G30 NATURAL A0400 97SA310900 S SLANT POLE AS K MECHA A0500 97SA311000 T SLANT POLE AS K MECHA A0600 97SA308500 L LOADING AS K MECHA A0700 97SA308600 R LOADING AS K MECHA A0800 97SA308400 LOADING RACK AS K MECHA A0900 97S3101800 WASHER POLY D3 1XD8XT0 5 A1000 97S8100700 MOTOR CAPSTAN F...

Page 47: ...2510 97SA409700 BAND BRAKE AS K MECHA B2520 97S0400700 BAND BRAKE CAP DURACON M90 02 NATURAL A2600 97S3003500 SPG TENSIION SWPB D0 4 A2700 97SA309300 S SUB BRAKE AS K MECHA A2800 97SA309400 T SUB BRAKE AS K MECHA A2900 97SA309110 MAIN BRAKE AS K MECHA A3100 97S8012900 HEAD FE HVFHF0004AK 97S8004500 HEAD FE MH 132D A3200 97S3102100 SCREW TAPTITE TT2 BIN P 2 6X10 MFZN A3300 97SA309000 REEL GEAR TOT ...

Page 48: ...S022GBB ...