Daewoo K50, Service Manual

Page 1: ...S M No K3050MECHA March 2000 DAEWOO ELECTRONICS CO LTD http svc dwe co kr Service Manual VCR MECHANISM UNIT K50 K30 MECHA DECK...

Page 2: ...NTS 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 L...

Page 3: ...5 K30 MECHA DECK is operated by 7 MODES EJECT INITIAL REV IDLE PLAY STOP SLOW BRAKE FF REW 6 K30 MECHA DECK reduces the mode shifting time that is picture playing time by using the FULL LOADING SYSTE...

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

Page 5: ...I FI 1 A L 2 COMMON 3 A R 4 SP L 5 COMMON 6 SP R 7 GND 8 EP R 9 COMMON 10 EP 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 CAPS...

Page 6: ...ASS Y 3 TENSION BAND ASS Y 4 REEL TABLE 5 MAIN BASE ASS Y 6 RECORD SAFETY LEVER 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 L...

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: ...ng 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 2 2 CLEAN...

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...

Page 11: ...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...

Page 12: ...11 2 3 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 8 1 8 2 8 3...

Page 13: ...See Fig 3 1 a Remove 2 screws fixing the Front Loading ASS Y b Lift the rear of the front loading assembly to separate it from the Main Base NOTE The FRONT LOADING ASSEMBLY can be removed only in the...

Page 14: ...the F L BRACKET R and move the F L BRACKET 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...

Page 15: ...DOOR OPENER Fig 3 4 f Remove the LOADING LEVER 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 S...

Page 16: ...e F L BRAKCET R Fig 3 6 3 3 DRUMASS Y EARTHBRACKETASS YREMOVAL See Fig 3 7 a Remove three screws fixing the DRUM TOTAL ASSEMBLY b Carefully lift the DRUM TOTAL ASSEMBLY from the DECK MECHANISM taking...

Page 17: ...remove the REEL BELT b Remove one POLY WASHER c Remove the LOADING RACK ASS Y d Remove R L LOADING ASS YS and e Remove the S and T SLANT POLES and by pulling them in the directions of the arrows CAUTI...

Page 18: ...TAPE TRANSPORTING SYSTEM spread the A C HEAD NUT AZIMUTH SCREW and TILT SCREW with LOCKING PAINT 3 6 L CBRACKETASS YREMOVAL See Fig 3 11 a Remove one screw from the L C BRACKET ASSEMBLY b Remove the...

Page 19: ...E by pulling it in the direction of the arrow NOTE When reassembling refer to Fig 3 12 13 3 9 S TMAIN SUBBRAKEASS YREMOVAL See Fig 3 14 a Remove the S T MAIN BRAKE Assembly from the MAIN VASE b Unhook...

Page 20: ...ting the tab of hook A remove the TENSION BAND ASSEMBLY Fig 3 16 NOTE After assembling the TENSION BAND ASSEMBLY on the MAINBASE adjust the position of TENSION POLE as shown Fig 3 17 Avoid getting GRE...

Page 21: ...CAPSTAN MOTOR and separate the CAPSTAN MOTOR a Remove one POLY WASHER from the REEL GEAR POST and remove the IDLER PLATE TOTAL ASSEMBLY from the MAIN BASE b Remove the S T REEL TABLES and two POLY SL...

Page 22: ...CT PLATE from the MAINBASE by pushing it in the direction of the arrow NOTE When removing the CONNECT PLATE with the F L RACK installed take care not to damage or bend the CONNECT PLATE After assembli...

Page 23: ...sure that the DATUM HOLE of the CAM GEAR is 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 P...

Page 24: ...INBASE make sure that the two triangular marks of CAM SWITCH 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 C...

Page 25: ...the notch B on the R LOADING ASSEMBLY as shown in Fig 4 5 f Make sure that the teeth of the LOADING RACK ASSEMBLY are aligned with those of the R LOADING ASSEMBLY so that the hole of the LOADING RACK...

Page 26: ...g result should be 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 NOTE...

Page 27: ...ff the power when the MECHANISM is in the desired 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 hol...

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 TGUIDEPOSTFLANGE A C HEAD AS ADJUSTMENT TILT ADJUSTMENT CLEANING AUDIOAZIMUTHADJUSTMENT...

Page 29: ...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 wri...

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 tha...

Page 31: ...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 b...

Page 32: ...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...

Page 33: ...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...

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 TR...

Page 35: ...e 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...

Page 36: ...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 DP...

Page 37: ...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...

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

Page 39: ...38 6 2 EXPLODEDVIEWOFDECKASS Y BOTTOMVIEW...

Page 40: ...39 6 3 EXPLODEDVIEWOFF LASS Y...

Page 41: ...40 D0040 D0020 D0050 D0010 D0080 D0090 D0060 D0070 D0040...

Page 42: ...AS DRP 9401 4HD MONO NON HEAD CLNER K30 M1OOO 97PC0339D DECK TOTAL AS DRP 9400 4HD MONO NON K30 M1OOO 97PC0340D DECK TOTAL AS DRP 9420 4HD MONO DLC K30 M1OOO 97PC0341D DECK TOTAL AS DRP 9421 4HD MONO...

Page 43: ...AS DRS 9600 4HD HI FI NON K30 97PC0254D DECK TOTAL AS DRS 9620 4HD HI FI DLC K30 SECAM 97PC0327D DECK TOTAL AS DRS 9400N 4HD MONO NON K50 97PC0325D DECK TOTAL AS DRS 9420N 4HD MONO DLC K50 97PC0326D...

Page 44: ...D 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 97PA27000...

Page 45: ...CHA K30 K50 A0600 97SA308510 L LOADING AS K30 MECHA K30 K50 A0700 97SA308600 R LOADING AS K MECHA K30 K50 A0800 97SA308400 LODING RACK AS K MECHA K30 K50 A0900 97S3101800 WASHER POLY D3 1XD8XT0 5 K30...

Page 46: ...9004 OIL LUBRICANT OA 305P K30 K50 A3800 2291131304 GREASE DELUXE 5221G NAM YOUNG K30 K50 AD002 7274301011 SCREW TAPPTITE TT3RND3X10MFZN SCREWFORASSEMLINGDRUM K30 K50 AF002 7274300611 SCREW TAPPTITE T...

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