Daewoo Electronics K3050MECHA User's Manual
Contents
1. CIRCULAR MARK ON LOADING GEAR R NOTCH IN LOADING GEAR R Fig 39 ASSEMBLY OF the RL LOADING ASSY amp LOADING RACK ASE 16 3 5 HEAD ASS Y REMOVAL See Fig 3 10 a Remove one nut hex i from the A C HEAD POST of the MAINBASE b Remove the A C HEAD ASSEMBLY 2 from the MAINBASE c Remove the A C HEAD SPRING 3 from the A C HEAD ASSEMBLY NOTE After reassembling adjust the TAPE TRANSPORTING SYSTEM refering to chapter 5 ADJ USTMENT OF THE TAPE TRANSPORTING SYSTEM After adjusting the TAPE TRANSPORTING SYSTEM spread the A C HEAD NUT AZIMUTH SCREW and TILT SCREW with LOCKING PAINT Fig 3 10 DISASSEMBLY OF THE AC HEAD 65 3 6 L C BRACKET ASS Y REMOVAL See Fig 3 11 a Remove one screw from the BRACKET ASSEMBLY 3 b Remove the L C BRACKET ASSEMBLY 2 from the MAINBASE 3 7 PINCH LEVER TOTAL ASS Y REMOVAL See Fig 3 11 a Remove one POLY WASHER 3 from the PINCH LEVER POST ofthe MAINBASE b Unhook the PINCH LEVER SPRING 4 from the hook of MAINBASE amp and remove the PINCH LEVER TOTAL ASSEMBLY 5h CAUTION Take care not to coat GREASE OIL or other substances on the surface of the PINCH Fig 3 11 LAS BRKT PINCH LEVER CAM GEAR ROLLER ith RELAY LEVER F L RACK REMOVAL 17 3 8 GEAR RELAY LEVER AND RACK REMOVAL Gee Fig 3 11 a Remove the CAM GEAR 5 from the MAINBASE Fig 3 11 b Remove the RELAY LEVE2. DRP 9201N 2HD SP LP MONO NON HEAD CLNER K50 97PC0314D DECK TOTAL AS DRP 9220N 2HD SP LP MONO DLC K50 M1000 97PC0320D DECKTOTAL AS DRP 9221N 2HD SP LP MONO DLC HEAD CLNER K50 M1000 97PC0316D DECKTOTAL 5 DRP 9400N 4HD MONO NON K50 97PC0322D DECK TOTAL AS DRP 9401N 4HD MONO NON HEAD CLNER K50 97PC0313D DECK TOTAL AS DRP 9420N 4HD MONO DLC K50 M1000 97PC0319D DECK TOTAL AS DRP 9421N 4HD MONO DLC HEAD CLNER K50 M1000 97PC0315D DECK TOTAL AS DRP 9600N 4HD HI FI NON K50 97PC0321D DECK TOTAL AS DRP 9601N 4HD HI FI NON HEAD CLNER K50 M1000 97PC0312D DECK TOTAL AS DRP 9620N 4HD HI FI DLC K50 M1000 97PC0318D DECK TOTAL AS DRP 9621N 4HD HI FI DLC HEAD CLNER K50 41 LOC STOCK NO PART NAME DESCRIPTION SECAM 97PC0345D DECK TOTAL 5 DRS 9400 4HD NON K30 97PC0346D DECK TOTAL 5 DRS 9420 4HD DLC K30 97PC0347D DECK TOTAL 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 5 DRS 9420N 4HD DLC K50 97PC0326D DECK TOTAL AS DRS 9600N 4HD HI FI NON K50 97PC0324D DECK TOTAL AS DRS 9620N 4HD HI FI DLC K50 42 6 4 2 PARTS LIST OF DRUM PRICE ASS Y LOC srockwo PART NAME DESCRIPTION
3. DOOR OPENER B FRONT VIEW RELEASE LEVER UPPER SPRING F L BRKT R CST HOLDER PLATE LOADING LEVER L LOADING LEVER R LOADING SHAFT 2 2 PERIODIC MAINTENANCE AND SERVICE SCHEDULE 2 2 1 PERIODIC MAINTENANCE AND SERVICE SCHEDULE A In order to effectively maintain the excellent performance and fully utilize the features of this apparatus and to lengthen the life of the mechanism and tapes we strongly urge you to perform periodic maintenance and inspection as described below After repairing do the maintenance described below irrespective of the length of time in use B Cleaning of the Head Drum Ass y Clean the Drum assembly with a cleaning cloth soaked in liquid cleaner alcohol by placing lightly against the Drum and slowly revolving the rotating HEAD DRUM Ass y by hand Do not rotate the upper Drum by applying electric power to the motor when cleaning Do not move the cleaning cloth in the vertical direction against the heat tip C Cleaning the tape transporting section Clean the tape transporting parts with a cleaning cloth soaked in alcohol D Cleaning of driving section Clean the driving section with a cloth soaked in alcohol 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 m 2 2 2 CLEANING AND LUBRICATION A Cleaning of Tape Transporting section and Driving se
4. MEASURING EQUIPMENT OSCILLOSCOPE a Connectthe OSCILLOSCOPE to the AUDIO OUTPUT J ACK b Play back the ALIGNMENT TAPE NTSC DN1 SP 1KHz PAL DP1 SP 2 c Check the AUDIO OUTPUT SIGNAL is 9 3dBm d If the requirement c is not satisfied adjust the A C HEAD TILT SCREW and A C HEAD HEIGHT NUT to obtain the maximum audio output Fig 5 3 K A C HEAD AZIMUTH ADJ USTMENT a Connect the OSCILLOSCOPE to the AUDIO OUTPUT J ACK 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 DRUM ENTRANCE EXIT TEST POINTS AUDIO OUTPUT AUDIO OUTPUT JACK MEASURING EQUIPMENT OSCILLOSCOPE 35 L X POSITION See Fig 5 11 S W PULSE TEST PIN PATH ADJ FIXTURE TEST POINTS ENVELOPE TEST PIN PATH ADJ FIXTURE MEASURING EQUIPMENT OSCILLOSCOPE VR CONTROL PATH ADJ FIXTURE ADJUSTMENT ADJUST BOSS MAIN BASE a Connectthe PATH ADJ FIXTURE to PTO1 ofthe MAIN CIRCUIT BOARD b Play back the ALIGNMENT TAPE COLOR SIGNAL BAR Connect the channel 1 scope probe to the S W PULSE TEST PIN of the of the PATH AD FIXTURE d Connect the channel 2 scope probe to the ENVELOPE TEST PIN of the PATH ADJ FIXTURE e Adjust the VR CONTROL to the center position When the VA CONTROL is completely turned counter Clockwise it is set at another tracking cent
5. i i MINIE ammm Fig 5 9 FINE TUNING OF THE ENVELOPE AT THE DRUM ENTRANCE EXIT Il I REVIEW xAPLAY See Fig 5 10 S W PULSE TEST PIN PATH ADJ FIXTURE TEST POINTS ENVELOPE TEST PIN PATH ADJ FIXTURE MEASURING EQUIPMENT OSCILLOSCOPE VR CONTROL PATH ADJ FIXTURE ADJUSTMENT S T GUIDE ROLLER TAPE TRANSPORTIN SYSTEM a Connect the PATH FIXTURE to PTO1 of the MAIN CIRCUIT BOARD b Play back the ALIGNMENT TAPE SP COLOR BAR SIGNAL Connect the channel 1 scope probe to the S W PULSE TEST PIN of the PATH AD FIXTURE d Connectthe channel 2 scope probe to the ENVELOPE TEST PIN ofthe PATH ADJ FIXTURE e Adjust the VR CONTROL of the PATH AD FIXTURE to the center to obtain the maximum envelope signal of the ALIGNMENT TAPE f After operating the VCR in the 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 ENVELOPE PICTURE n m C J REVIEW PLAY Fig 5 10 CHECK OF TRANSITIONAL OPERATION FROM REVIEW WAVEFORM TO PLAY WAVEFORM 34 J AUDIO OUTPUT HEAD TILT amp HEIGHT USTMENT TEST POINTS AUDIO OUTPUT AUDIO OUTPUT JACK
6. 5 5 X POSITION ADJUSTMENT 30 F PLAYBACK PHASE ADJ USTMENT SeeFig 5 6 S W PULSE TEST PIN PATH ADJ FIXTURE TEST POINTS VIDEO OUT MAIN CIRCUIT BOARD MEASURING EQUIPMENT OSCILLOSCOPE ADJUSTMENT VR595 PG SHIFTER MAIN CIRCUIT BOARD Phase generator PG shifter decides the VIDEO HEAD switching point when a TAPE is played back In case the Phase generator PG shifter isn t correctly tuned HEAD switching noise or vertical jitter may occur a Connect the PATH FIXTURE to PTO1 of the MAIN CIRCUIT BOARD b Play the ALIGNMENT TAPE COLOR BAR SIGNAL OR MONOSCOPE SIGNAL c Connect the channel 1 scope probe to the S W PULSE TEST PIN of the PATH AD 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 SWITCHING SW PULSE V SYNC VIDEO WIN 1 a 6 5 0 Fig 5 6 PLAYBACK PHASE ADJUSTMENT 31 G LINEARITY ADJ USTMENT S W PULSE TEST PIN PATH ADJ FIXTURE TEST POINTS ENVELOPE TEST PIN PATH ADJ FIXTURE MEASURING EQUIPMENT OSCILLOSCOPE VR CONTROL PATH ADJ FIXTURE ADJUSTMENT S T GUIDE ROLLER TAPE TRANSPORTING SYSTEM a Connect the PATH FIXTURE to PTO1 ofthe MAIN CIRCUIT BOARD b Play back the ALIGNMENT TAPE COLOR BAR SIGNAL c Connect the channel 1 scope probe to the S W PULSE T
7. DRUM 10 T GUIDE POST HEAD 7 SLANT POLE 11 CAPSTAN SHAFT 455 GUIDE ROLLER 8 1 GUIDE ROLLER 2 PINCH ROLLER S VERTICAL POST Fig 5 1 THE SCHEMATIC DIAGRAM OF TAPE TRANSPORTING SYSTEM When the parts as shown in Fig 5 1 are replaced the TAPE TRANSPORTING SYSTEM has changed To prevent this it is essential to know thoroughly and observe the following INSTRUCTIONS A ADJ USTMENT 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 IFTAPE wrinkle is observed at the S T GUIDE ROLLER adjust them so that no wrinkle occurs 28 B ADJ USTMENT A C HEAD ASS Y TILT ADJ USTMENT TURN THE A C HEAD TILT SCREW TO THE DIRECTION a Play back a T 120 Tape and check the running condition of SPON the TAPE at the lower flanges of the T GUIDE POST X e ASS Y nein Fig 5 1 b Adjustthe A C HEAD TILT SCREW untill the TAPE runs O stable as shown in Fig 5 2 eG TURN THE A C HEAD TILT SCREW TO THE DIRECTION OF x CCW Fig 5 2 A C HEAD ASS Y ADJUSTMENT TILT ADJUSTMENT C ADJ USTMENT OF THE AUDIO AZIMUTH See Fig 5 3 a Play back the ALIGNMENT CASSETTE TAPE NTSC DN2 SP 7 2 PAL DP2 SP 6 2 b Observe audio signals on an OSCILLOSCOPE c Tum the A C HEAD AZIMUTH SCREW to obtain the maximum audio output signal 9 3dBm D ADJUST BOSS FIXING SCREW AC HEAD AZIMUTH SCR
8. M1000 97 02700 DECKTOTAL AS DRN 9420 4HD DLC K50 97PCO268D DECK TOTAL AS DRN 9429A 4HD MONO DLC HEAD CLNER TIMELAPSE M1000 97PC0349D DECK TOTAL AS DRN 9409A 4HD MONO NON HEAD CLNER nmMELAPSE 97PC0265D DECK TOTAL AS DRN 9600 4HD HI FI NON K50 97PC0248D DECK TOTAL AS DRN 9601 4HD HI FI NON HEAD CLNER K50 M1000 97PC0271D DECK TOTAL AS DRN 9620 4HD HI FI DLC K50 PAL M1000 97PC0332D DECK TOTAL AS DRP 9100 2HD SP MONO NON K30 M1000 97PC0333D DECK TOTAL AS DRP 9120 2HD SP MONO DLC K30 DECK TOTAL AS DRP 9121 2HD SP MONO DLC HEAD CLNER K30 DECK TOTAL AS DRP 9200 2HD SP LP MONO NON K30 M1000 97PC0336D DECK TOTAL AS DRP 9201 2HD SP LP NON HEAD CLNER K30 M1000 97PC0337D DECK TOTAL 5 DRP 9220 2HD SP LP MONO DLC K30 DECK TOTAL AS DRP 9401 4HD MONO NON HEAD CLNER K30 DECK TOTAL AS DRP 9400 4HD MONO NON K30 M1000 97PC0340D DECK TOTAL AS DRP 9420 4HD MONO DLC K30 M1000 97PC0341D DECK TOTAL AS DRP 9421 4HD MONO DLC HEAD CLNER K30 DECK TOTAL AS DRP 9600 4HD HI FI NON K30 97PC0343D DECK TOTAL AS DRP 9601 4HD HI FI NON HEAD CLNER K30 M1000 97PC0253D DECK TOTAL AS DRP 9620 4HD HI FI DLC K30 DECK TOTAL AS DRP 9621 4HD HI FI DLC HEAD K30 M1000 97PC0348D DECK TOTAL AS DRP 9429A 4HD DLC HEAD CLNER TIMELAPSE PAL M1000 97PC0317D DECKTOTAL AS DRP 9200N 2HD SP LP MONO NON K50 97PC0323D DECK TOTAL AS
9. O 1 FE HEAD 11 T SUB BRAKE ASS Y 2 5 SLANT POLE ASS Y 12 RELAY LEVER 3 TENSION BAND ASS Y 13 CAPSTAN MOTOR 4 REEL TABLE 14 PINCH LEVER TOTAL ASS Y 5 MAIN BASE ASS Y 15 L C BRKT TOTAL ASS Y 6 RECORD SAFETY LEVER 16 CAM GEAR 7 95 SUB BRAKE ASS Y 17 HEAD TOTAL ASS Y 8 5 MAIN BRAKE ASS Y 18 T SLANT POLE ASS Y 9 IDLER PLATE TOTAL ASS Y 19 DRUM TOTAL ASS Y 10 T MAIN BRAKE ASS Y B BOTTOM VIEW gt D 0 lt E 5 q zj 1 CAPSTAN MOTOR 2 F LRACK 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 2 1 2 PARTS LOCATION OF FRONT LOADING ASS Y A TOP VIEW PRISM LINK L CST HOLDER PLATE PRISM LINK R TOP PLATE SAFETY LEVER SAFETY LEVER R
10. 0 L C MOTOR AS K MECHA K30 K50 B1920 97P6538222 PCB L C MOTOR PHENOL T1 6 K30 K50 B1930 97P6271500 CONN WAFER ANGLE 00 8283 0711 00000 K30 K50 B1940 5SSF1DKM10 SW CAM MMS00320ZMBO K30 K50 B1960 9792901500 WHEEL WORM DERLIN 100 NATURAL K30 K50 LOC STOCK NO PART NAME DESCRIPTION A2000 7274300611 SCREW TAPPTITE TT3 RND 3X6 MFZN K30 K50 A2100 97SA311620 IDLER PLATE AS K30 MECHA HI REW K30 A2100 97SA311600 IDLER PLATE AS K50 MECHA NORMAL K50 A2200 9783108200 POLYWASHER D2 6XD6 0XT0 5 K30 K50 A2300 9752901600 TABLE REEL F20 BLACK K30 K50 A2400 9753903600 POLY SLIDER D3 1XD6XT0 5 K30 K50 A2500 97SA310800 TENSION BAND AS K MECHA K30 K50 A2600 9753003500 SPG TENSION SWPB D0 4 K30 K50 A2700 975 309300 S SUB BRAKE AS K MECHA K30 K50 A2800 975 309400 SUB BRAKE AS K MECHA K30 K50 A2900 97SA309120 MAIN BRAKE AS K30 MECHA HI REW K30 A2900 97SA309110 MAIN BRAKE AS K50 MECHA NORMAL K50 A3100 9758012900 HEAD FE HVFHFO004AK LG K30 K50 A3200 9783102100 SCREW TAPPTITE TT2 BIN P 2 6X10 K30 K50 A3300 975 309020 REEL GEAR AS K30 MECHA HI REW K30 A3300 975 309000 REEL GEAR AS K50 MECHA NORMAL K50 A3400 9783108200 POLYWASHER D2 6XD6 0XT0 5 K30 K50 A3500 9785500400 BELT REEL CR68 K30 K50 A3600 9782625500 LEVER REC SAFETY F20 03 SKY BLUE K30 K50 A3700 2291129004 OIL LUBRICANT OA 305P K30 K50 A3800 2291131304 GREASE DELUXE 5221G NAM YOUNG K30 K
11. 50 AD002 7274301011 SCREW TAPPTITE TT3RND3X10MFZN SCREW FOR ASSEMLING DRUM K30 K50 AF002 7274300611 SCREW TAPPTITE TT3 RND 3X6 MFZN SCREW FOR ASSEMLING F L K30 K50 F L AS AF001 97SA251400 F L AS K MECHA K30 K50 A5000 9750902000 SECC T1 0 K30 K50 A5100 9752400900 BRKT F L R SECC T1 0 K30 K50 A5200 97SA311400 CST HOLDER AS K MECHA K30 K50 B5200 97SA410100 HOLDER AS K MECHA K30 K50 B5230 97S2605400 LEVER RELEASE DURACON M90 02 NATURAL K30 K50 B5240 9783004700 SPG RELEASE SUS304WPB D0 23 K30 K50 B5250 9752605500 LEVER SAFETYR SUS304CSP T0 5 K30 K50 B5260 9783101600 WASHER POLY D6 5XD3 6XT0 5 K30 K50 A5300 97SA311500 LOADING LEVER AS K MECHA K30 K50 B5330 9753004800 SPG FL LEVER SWPB D1 0 K30 K50 A5400 9752602210 LINK PRISM L PMMA HI 855M NATURAL K30 K50 A5500 9752602110 LINK PRISM R PMMA HI 855M NATURAL K30 K50 A5700 9751800400 OPENER DOOR DURACON M90 02 BLACK K30 K50 A5800 7278260611 SCREW TAPPTITE TT3 WAS 2 6 6 MFZN K30 K50 A5900 7278300611 SCREW TAPPTITE TT3 WAS 3X6 MFZN K30 K50 HEAD CLEANER AS 001 975 381500 HEAD CLEANER AS FM K MECHA K30 K50 45 DAEWOO DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P 0 BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC E mail G7F 00E web dwe co kr TEL 82 2 360 7802 FAX 822 360 7877
12. E DATUM HOLE OF TENSION LEVER BAND BRAKE ADJUST CAP Fig TENSION POLE POSTION ADJUSTMENT 26 5 ADJ USTMENT OF TAPE TRANSPORTING SYSTEM Generally the TAPE TRANSPORTING SYSTEM has been precisely adjusted in the factory and does not ordinarily require readjustment But when noise and tape damage take place and part assemblies that compose the TAPE TRANSPORTING SYSTEM are replaced check and readjust the TAPE TRANSPORTING SYSTEM Refer to the following FLOW CHART in orderto adjustthe TAPE TRANSPORTING SYSTEM DRUM TOTAL ASS Y HEAD ASS Y PINCH LEVER TOTAL ASS Y 1 S POLE BASE ASS Y T POLE BASE ASS Y TENSION LEVER ASS Y S T GUIDE ROLLER HEIGHT j AUDIO AZIMUTH ADJUSTMENT Y A C HEAD ADJUSTMENT X POSITION ADJUSTMENT I PLAYBACKPHASEADJUSTMENT LINEARITY USTMENT een ADJUSTMENT S T GUIDE POST FLANGE A C HEAD AS ADJUSTMENT TILT ADJUSTMENT ME ae DRUM ENTRANCE EXIT ENVELOPE FINE TUNING i REVIEW xa PLAY CHANGING OPERATION CHECK N AUDIO OUTPUT CHECK A C HEAD TILT amp HEIGHT ADJ USTMENT AUDIO AZIMUTH ADJUSTMENT X POSITION ADJUSTMENT N TRACKING Table 1 ADJUSTMENT FLOW DIAGRAM OF THE TAPE TRANSPORTING SYSTEM 27 0 POLE 5 5 SLANT POLE Q A C HEAD 2 5 GUIDE POST 6
13. EST PIN of the PATH AD FIXTURE d Connect the channel 2 scope probe to the ENVELOPE TEST PIN of the PATH ADJ FIXTURE e Adjust the VR CONTROL of the PATH 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 a Max Output of Envelope b Min Output of Envelope bla20 5 Fig 5 7 LINEARITY ADJUSTMENT 32 H DRUM ENTRANCE EXIT See Fig 5 8 5 9 S W PULSE TEST PIN PATH ADJ FIXTURE TEST POINTS ENVELOPE TEST PIN PATH ADJ FIXTURE MEASURING EQUIPMENT OSCILLOSCOPE VR CONTROL PATH ADJ FIXTURE ADJUSTMENT S T GUIDE ROLLER TAPE TRANSPORTING SYSTEM a Connect the PATH ADJ FIXTURE to PTO1 the MAIN CIRCUIT BOARD b Play back the ALIGNMENT TAPE COLOR BAR SIGNAL Connect the channel 1 scope probe to the S W PULSE TEST PIN ofthe PATH FIXTURE d Connect the channel 2 scope probe to the ENVELOPE TEST PIN of the PATH ADJ FIXTURE e When turning the VR CONTROL of the PATH ADJ FIXTURE clockwise or counter clockwisw affirm that the envelope thickness changes uniformly f If the envelope is not uniform and regular adjust the S T GUIDE ROLLER E WANE ENTRANCE gt DZ DRUM EXIT Fig 5 8 FINE TUNING OF THE ENVELOPE AT THE DRUM ENTRANCE EXIT 1 33 I lm
14. EW amp AC HEAD SPRING AC HEAD TILT SCREW AC HEAD NUT Fig 5 3 A C HEAD ASSY D THE HEIGHT ADJ USTMENT 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 ADJ UST NUT counter clockwise When the gap is shorterthan 0 25mm tum it clockwise Repeat this procedure untill 0 25mm is obtained TAPE GAP 0 25mm Fig 5 4 A C HEAD ASS Y ADJUSTMENT HEIGHT ADJUSTMENT 29 E X POSITION ADJ USTMENT S W PULSE TEST PIN PATH ADJ FIXTURE TEST POINTS ENVELOPE TEST PIN PATH ADJ FIXTURE MEASURING EQUIPMENT OSCILLOSCOPE VR CONTROL PATH ADJ FIXTURE ADJUSTMENT ADJUST BOSS MAIN BASE a Connect the path adjustment fixture to PTO1 of the MAIN CIRCUIT BOARD b Play back the ALIGNMENT TAPE COLOR BAR ALIGNMENT c Connect channel 1 scope probe to S W PULSE TEST PIN of PATH ADJ FIXTURE d Connect channel 2 scope probe to ENVELOPE TEST PIN of PATH FIXTURE e Tum 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 ADJ UST BOSS by using FLAT TYPE SCREW DRIVER and adjust the X POSITION to obtain the maximum envelope waveform CENTER CW 1 CW FIN CENTER TRACKING TRACKING TRACKING Ban CENTER CCW CENTER CCW LIMIT Fig
15. EW MACHINE PAN 2 6X7 MFZN K30 K50 D0050 97SA320400 EARTH GROUND AS T DRUM K30 K50 D0060 9782303600 HOLDER MAIN POM KEPITAL F20 K30 K50 D0070 9752303700 HOLDER CAP A POM 2CH K30 K50 D0070 9752303800 HOLDER CAP B POM 4CH K30 K50 D0070 9752303900 HOLDER CAP C POM 6CH K30 K50 D0080 9751401700 BASE DRUM FM M NON MACHINING ADC K30 K50 D0090 7051300611 SCREW MACHINE PAN 3X6 SW MFZN K30 K50 DECK AS 001 DECK AS REFERRING TO LIST OF DECK TOTAL ASS Y A0100 975 309700 MAIN BASE AS K MECHA K30 K50 A0200 9750901400 PLATE CONNECT SECC T1 0 K30 K50 A0300 9752701800 RACK F L PBT KP213G30 NATURAL K30 K50 97SA310900 S SLANT POLE AS G FM K MECHA K30 K50 97SA311000 T SLANT POLE AS G FM K MECHA K30 K50 97SA308510 L LOADING AS K30 MECHA K30 K50 97SA308600 R LOADING AS K MECHA K30 K50 97SA308400 LODING RACK AS K MECHA K30 K50 9783101800 WASHER POLY D3 1XD8XT0 5 K30 K50 9798101700 MOTOR CAPSTAN F2QTB44 K30 K50 A1100 9753102000 SCREW TT2 BIN P 2 6X7 K30 K50 A1200 9753004000 SPG AC HEAD SUS304WPB D1 2 K30 K50 97SA311200 AC HEAD AS HVMZA1900AK LG RECORD K30 K50 7391300211 NUT HEX 6N 1 5 MFZN K30 K50 A1500 9792604100 LEVER RELAY ZDC 2 K30 K50 A1600 97S2701400 GEAR CAM DELIN 500 NATURAL K30 K50 97SA310700 PINCH LEVER TOT AS K MECHA K30 K50 9783117300 WASHER POLY D3 6XD8XT0 5 K30 K50 975 310400 L C BRKT TOT AS K MECHAK K30 K50 B1900 97SA414100 L C BRKT AS K MECHA K30 K50 B1910 97SA40920
16. H are aligned with each other as shown in Fig 4 3 TRIANGLE MARKS MUST MEET EACH OTHER Fig 4 5 DATUM POSITION OF CAM SWITCH TRIANGULAR MARES 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 Fig DATUM POSITION OF PINCH LEVER TOTAL ASSY CAM GEAR 23 e Make sure that the triangular mark A on the L LOADING ASSEMBLY is aligned with 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 ASSEMBLY aligns with the circular mark on the R LOADING ASSEMBLY as shown in Fig 4 5 R LOADING ASS Y B TRIANGULAR MARK ON L LOADING ASS Y CIRCULAR MARK OF R LOADING ASS Y NOTCH IN R LOADING ASS Y Fia 4 5 DATUM FOSITION OF LOADING RACK ASSY RL LOADING LEVER 24 4 2 BACK TENSION MEASUREMENT Gee Fig 4 6 4 7 a Confirm that the position of the TENSION POLE is correctly POSITIONED Refer to the 4 4 TENSION POLE POSITION ADJ USTMENT b Play back a T 120 TAPE at its center position without assemblying F L ASSEMBLY and wait until the TAPE running is stabilized about 5 10 seconds c Bring the TENTELOMETER into contact with the TAPE Fig 4 6 and measure the BACK TENSION The mea
17. NSION BAND 69 REMOVAL ID DATUM HOLE OF MAINBASE DATUM HOLE OF TENSION LEVER Fig 3 1 ADJUSTMENT OF THE TENSION FOLE POSITION 19 311 CAPSTAN MOTOR REMOVAL See Fig 3 18 Remove 3 screws fixing the CAPSTAN MOTOR and separate the CAPSTAN MOTOR Fiag 3c CAPSTAN MOTOR REMOVAL 3 12 IDLER PLATE TOTAL ASS Y amp S T REEL TABLE REMOVAL See Fig 3 19 a Remove one POLY WASHER from the REEL GEAR POST 2 and remove IDLER PLATE TOTAL ASSEMBLY from the MAIN BASE b Remove the S T REEL TABLES 4 and two POLY SLIDERS the DECK MECHANISM CAUTION When disassembling or assembling the IDLER PLATE TOTAL ASSEMBLY take care not to bend it Fig 3 19 IDLER PLATE TOTAL ASSY S T REEL TABLES REMOVAL 20 3 13 FE HEAD REMOVAL Gee Fig 3 20 Remove one screw fixing the FE HEAD and remove the FE HEAD from the MAINBASE Fig 320 FE HEAD REMOVAL 3 14 REEL GEAR TOTAL ASS Y amp CONNECT PLATE REMOVAL Fig 3 21 a Turn over the DECK MECHANISM and remove 20 one POLY WASHER 7 from REEL GEAR POST 5 b After separating tab B of the MAINBASE remove the REEL GEAR TOTAL ASSEMBLY from the MAINBASE c Remove the CONNECT PLATE from the MAINBASE by pushing it in the direction of the arrow Qu Fig 321 REEL GEAR TOTAL ASSY CONNECT PLATE REMOWAL NOTE When rem
18. NTSC 97PA277471 DRUM PRICE AS CYN T212 2HD SP EP DLC AD001 97PA264841 DRUM PRICE AS CYN T213 2HD SP EP BLK 97PA269001 DRUM PRICE AS CYN T410 4HD MONO NON 97PA277571 DRUM PRICE AS CYN T412 4HD MONO DLC 97PA264941 DRUM PRICE AS CYN T413 4HD MONO BLK 97PA269101 DRUM PRICE AS CYN T610 4HD NON 97PA277671 DRUM PRICE AS CYN T612 4HD HI FI DLC 97PA265041 DRUM PRICE AS CYN T613 4HD HI FI BLK 0001 97 272071 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 A YP KT210 2HD SP LP NON ADOO 9 PA2660 DRUM PR A P K 14 4HD MONO D AD001 97PA270101 DRUM PRICE AS CYP KT410 4HD MONO NON AD001 97PA272771 DRUM PRICE AS CYP KT612 4HD HI FI DLC AD001 97PA272601 DRUM PRICE AS CYP KT610 4HD HI FI NON SECAM 0001 97PA266171 DRUM PRICE AS CYS KT412 4HD MONO DLC AD001 97PA270201 DRUM PRICE AS CYS KT410 4HD MONO NON AD001 97PA272971 DRUM PRICE A YS KT612 4HD HI FI DL AD001 97PA272801 DRUM PRICE AS CYS KT610 4HD HI FI NON 43 6 4 3 PARTS LIST OF DRUM TOTAL ASS Y LOC STOCK NO PART NAME DESCRIPTION DRUM AS D0010 DRUM AS REFERRING TO LIST OF DRUM PRICE ASS Y D0030 97SA324400 DRUM M T AS E20XL 25 K30 K50 D0030 97SA327100 DRUM M T AS DMVDMTO4M K30 K50 D0040 7001260711 SCR
19. R amp from the MAINBASE Fig 3 11 c Remove the F L RACK from the MAINBASE by pulling it in the direction of the arrow NOTE When reassembling refer to Fig 3 12 13 CAM GEAR DATUM HOLE OF CAM GEAR n DATUM HOLE OF MAINBASE Fig 3 12 ASSEMBLY OF THE CAM GEAR Fig 3 13 ASSEMBLY OF THE CAM GEAR amp RELAY LEVER RACK 3 9 S T MAIN amp SUB BRAKE ASS Y REMOVAL ee Fig 3 14 a Remove the S T MAIN BRAKE Assembly from the MAIN VASE 8 b Unhook the S SUB BRAKE SPRING from the MAINBASE and remove the S SUB BRAKE LEVER ASSEMBLY from the MAIN BASE amp c Unhook the T SUB BRAKE SPRING 5 from the MAINBASE and remove the T SUB BRAKE LEVER ASSEMBLY 7 Fig 3 14 ST MAIN amp SUB BRAKES REMOVAL 18 3 10 TENSION BAND ASS Y REMOVAL Gee Fig 3 15 3 16 a Remove the TENSION SPRING 2 from the MAINBASE 3 Fig 3 15 b Turn the DECK MECHANISM over Fig 3 16 c After separating the tab of hook A remove the TENSION BAND ASSEMBLY 3 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 GREASE OIL or foreign substance on the FELT of the BAND BRAKE Take care not to deform tab A when separating it Tab A Fig 15 TENSION BAND ASSY REMOVAL 1 Fig 6 TE
20. Replace Note Even though the unit is not used frequently cleaning lubrication and replacement of the belt should be undertaken every 2 years 2 3 IGS ANDTOOLS 2 3 1 LIST OF JIGS AND TOOLS NO ITEMS MODEL a REMARKS NTSC SP MONOSCOPE 7KHz CHECKING OF THE 1 ALIGNMENT TAPE SP COLORBAR 1KHz 8 TAPE TRANSPORTING EP MONOSCOPE SYSTEM PAL SCAM SP MONOSCOPE 6KHz SP COLORBAR 1KHz LP MONOSCOPE CLEANING TAPE CHECKING OF THE TAPE DAEWOO 9 TRANSPORTING SYSTEM 3 CASSETTE TAPE KT 300NV MEASUREMENT OF KOKUSAI KT 300RV 9 REEL TORQUE VHS SPINDLE MEASUREMENT OF 3 HEIGHT GAUGE Lk 9 REEL HEIGHT TENTELO METER MEASUREMENT OF TENTELO Tenue 9 THE BACK TENSION FAN TYPE MEASUREMENT OF THE 6 TENSION METER BELOW 3KG B PRESSING FORCE FOR THE PINCH ROLLER CHECKING OF THE TAPE l TRANSPORTING SYSTEM DRIVER rl ASSEMBLY 8 HEX DRIVER 8 2 DISASSEMBLY 95 AD USTMENT DR IVER E3 10 3 DISASSEMBLY AND REPLACEMENT 3 1 FRONT LOADING ASS Y REMOVAL See Fig 3 1 NOTE The FRONT LOADING ASSEMBLY can be removed only in the eject position a Remove 2 screws fixing the Front Loading 55 b Lift the rear of the front loading assembly to separate it from the Main Base T AF002 T Fig 3 1 FRONT LOADING ASS Y SEPARATION 12 3 2 DISASSEMBLY OF THE FRONT LOADING AS
21. S M No K3050MECHA Service Manual VCR MECHANISM UNIT K50 K30 MECHA DECK DAEWOO ELECTRONICS CO LTD http svc dwe co kr March 2000 CONTENTS L MECHANISM DESCRIPTION ee ea 2 2 ASSEMBLY DIAGRAM amp MAJ OR PARTS CHECK oai ark buck A EA 5 3 DISASSEMBLY ANDREPLACEMENT une 12 A MECHANICAL AD US TM EN T a tutt 22 5 USTMENT OF TAPE TRANSPORTING SYSTEM w EE AE 27 EXPLODED VIEW AND PARTS EDT owak a u 37 1 DESCRPTION OF THE MECHANISM 1 1 OF THE K30 DECK MECHANISM K30 MECHA DECK follows the VHS standard K30 MECHA DECK uses three motors DRUM MOTOR CAPSTAN MOTOR and L C MOTOR K30 MECHA DECK uses L C MOTOR to drive FRONT LOADING K30 MECHA DECK recognizes each mode by using a 4 BIT MODE signal This 4 BIT MODE signal is generated by the CAM SWITCH which is driven by the L C MOTOR 5 K30 MECHA DECK is operated by 7 MODES EJ ECT INITIAL REV IDLE P LAY STOP SLOW BRAKE FF amp REW 6 K30 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 K30 MECHA DECK is seperated from the Main PCB When assembling it is connected by B B TYPE CONNECTOR The CAPSTAN MOTOR and DRUM OUTPUT ofK30 MECHA DECK and the MAIN PCB DECK directly connected without using cable I 2 3 4 1 2WIRE DIAGRAM 1 2 1 WIRE DIAGRAM ACE HEAD FE HEAD CAP
22. S Y GeeFig 3 2 3 6 a Remove one screw holding 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 TOP PLATE ASS Y SCREW LOADING LEVER ASS Y Fig 2 DIGASSEMBLY OF THE FRONT LOADING ASS Y c Remove one screw holding the PRISM LINK R and remove the PRISM LINK R from the F L BRACKET R Fig 3 3 F L BRKT R Fig 33 DIGASSEMBLY OF THE BRET R 13 d Remove one screw holding the PRISM LINK L Fig 3 4 e Release the hook B by pushing it in the direction of the arrow and remove the DOOR OPENER Fig 3 4 PRISM LINK L DOOR OPE Fig 3 4 DISASSEMBLY OF THE TCP PLATE 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 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 SAFETY LEVER R RELEASE SPRING LOADING LEVER AS Fig 35 DISASSEMBLY OF THE CASSETTE HOLDER ASS Y 14 Reassemble the FRONT LOADING MECHANISM in the reverse order Confirm that the two bosses on the left side of the CASSETTE HOLDER AS are inserted into the groove on the left side of the top plate Insert the two bo
23. STAN MOTOR END SENSOR LED MAIN PCB START SENSOR MAIN PCB MAIN PCB REEL SENSOR REEL SENSOR MAIN PCB MAIN PCB SWITCH DETECTOR MAIN PCB APPLIED TO ONLY RECORD MODEL 1 2 2 CONNECTOR PIN ARRANGEMENT CN 1 2 HEAD SP L COMMON SP R N 1 2 3 4 GND CN 1 4 HEAD SP L COMMON SP R GND EP R COMMON EP L A L COMMON A R SP L COMMON SP R GND EP R COMMON EP L CN A GND DRUM SPD CTL Vcc DRUM FG DRUM PG Nl OD ou E W N HH NON CONNECT NON CONNECT FE HEAD GND L C MT EVER 5V L C MT C GND CAPSTAN F R CAPSTAN FG CAM D CTL REF CAM C CAM B CAM A CTL CTL I LIMIT CAPSTAN M T 12V 18V GND CTL AUDIO AUDIO ERASE GND IC GND NON CONTACT Capstan M T Voltage of No 7 is 12V for normal model and 18V for HI REW model 2 ASSEMBLY DIAGRAM amp MAJ OR PARTS CHECK 2 1 ASSEMBLING DIAGRAM 2 1 1 ASSEMBLING DIAGRAM OF DECK ASS Y A TOP VIEW 18 17 6 J olo 56 9 o T w 9 e pot On b RITA 14 U _ 98 e R en 9 13 ro
24. ction a Cleaning of Tape Transporting section The following parts should be cleaned after every 500 hours of use TENSION POLE S SLANT POLE AC HEAD AE HEAD S GUIDE POST VIDEO HEAD DRUM GUIDE POST FEHEAD T SLANT POLE CAPSTAN SHAFT S GUIDE ROLLER T GUIDE ROLLER PINCH ROLLER VERTICAL POST As the above parts contact with the video tape they tend to collect dust particles If they are stained with dust or foreign substance it has a bad effect on the picture and may lead to damage of the tape After cleaning with alcohol allow the parts to dry thoroughly before using a cassette tape b Cleaning of Driving section REEL TABLE CAPSTAN FLYWHEEL PULLEY REEL PULLEY B LUBRICATION S REEL POST T REEL TABLE POST REEL GEAR POST After cleaning these parts with alcohol lubricate these with one or two drops of oil 2 2 3 SERVICE SCHEDULE FOR MAJ OR PARTS The following parts should receive periodic service according to the recommended intervals PERIODIC SERVICE TIME NAME DRUM TOTAL ASS Y CAPSTAN MOTOR i L C BRKT TOTAL ASS Y REEL BELT ic IDLER PLATE TOTAL ASS Y REEL TABLE c T SUB BRAKE ASS Y S MAIN BRAKE ASS Y TENSION BAND ASS Y T MAIN BRAKE ASS Y PINCH ROLLER ASS Y AC HEAD ASS Y FE HEAD REEL GEAR TOTAL ASS Y sk Check and Replace if necessary ic
25. er position f When the VR CONTROL is fully rotated clockwise or counter clockwise turn the ADJ UST BOSS ofthe MAINBASE and adjust the X POSITION forthe envelope waveform to be as shown in Fig 5 11 g Repeat the process F PLAYBACK PHASE ADJ USTMENT G LLLI CH A R HEAD CH A R HEAD CH A R HEAD TRACKING CCW 10ms A TRACKING CW 10ms Fig 5 11 X POSITION ADJUSTMENT 36 6 EXPLODED VIEW AND PARTS LIST 6 1 EXPLODED VIEW OF DECK ASS Y TOP VIEW A2500 A2300 2400 A2200 A2400 A 2 A0300 6 2 EXPLODED VIEW DECK ASS Y BOTTOM VIEW 5500 A0600 5400 5500 A1000 A0200 38 6 3 EXPLODED VIEW OF ASS Y ene B5260 B5240 A 39 D0040 D0050 D0020 6 4 1 PARTS LIST OF DECK TOTAL ASS Y LOC STOCK NO PART NAME DESCRIPTION NTSC 97PC0245D DECK TOTAL AS DRN 9200 2HD SP EP MONO NON K50 M1000 97PC0246D DECK TOTAL AS DRN 9201 2HD SP EP MONO NON HEAD CLNER K50 M1000 97 02690 DECK TOTAL AS DRN 9220 2HD SP EP MONO DLC K50 97PC0266D DECK TOTAL AS DRN 9400 4HD MONO NON K50 97 02470 DECKTOTAL AS DRN 9401 4HD NON HEAD CLNER K50
26. oving the CONNECT PLATE with the F L RACK installed take care not to damage or bend the CONNECT PLATE After assembling or disassembling the REEL GEAR TOTAL ASSEMBLY take care not to get OIL GREASE or other substances on the REEL BELT Take care not to deform or break tab B Check the assembly state amp the operating state of the REEL GEAR TOTAL ASSEMBLY befor assembling After reassembling check the REW PLAY and REVIEW MODES and the existence of noise when operating the MODES 21 4 MECHANICAL ADJ USTMENT 4 L MECHANICAL ADJ USTMENT See Fig 4 1 4 5 When operational problems occur or the mechanism is reassembled be sure to confirm the following INSTRUCTIONS a Make sure that the DATUM HOLE of the CAM GEAR is aligned with the DATUM HOLE in the MAINBASE in the EJ ECT mode as shown in Fig 4 1 CAM GEAR DATUM HOLE OF CAM GEAR DATUM HOLE OF MAIN BASE FIL RACK N 4 1 DATUM FOSITION OF RACK amp CAM GEAR 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 ofthe MAINBASE and is touching boss C of the MAINBASE as shown in Fig 4 2 Fig 4 2 DATUM POSITION OF RELAY LEVER CAM GEAR 22 c When reassembling the L C BRACKET TOTAL ASSEMBLY on the MAINBASE make sure thatthe two triangular marks of CAM SWITC
27. sses on the right side of the cassette holder into the groove of the F L BRAKCET R Fig 3 6 INSERT POINT TOP PLATE NE Fig 36 ASSEMBLY OF THE ASS 3 3 DRUM ASS Y EARTH BRACKET ASS Y REMOVAL See Fig 3 7 a Remove three screws fixing the DRUM TOTAL ASSEMBLY 3X10 b Carefully liftthe DRUM TOTAL ASSEMBLY 2 Y from the DECK MECHANISM taking care notto damage ortouch the VIDEO HEAD NOTE After assembling DRUM TOTAL ASSEMBLY confirm that the TAPE runs smooth and referto chapter 5 ADJ USTMENT OF THE TAPE TRANSPORTING SYSTEM When assembling the EARTH BRACKET ASSEMBLY a 3x12 screw should be used and at the other parts 3x10 screws should be used Fig 37 DRUM TOTAL ASS 6 EARTH BRET ASSY REMOVAL 15 3 4 REEL BELT LOADING RACK ASS Y LOADING ASS Y S T SLANT POLE ASS Y REMOVAL See Fig 3 8 a Turn over the DECK MECHANISM and remove the REEL BELT T b Remove one POLY WASHER 2 c Remove the LOADING RACK ASS Y 3 d Remove R amp L LOADING ASS YS amp e Remove the S and T SLANT POLES and 9 by pulling them in the directions of the arrows CAUTION Take care notto getthe GUIDE ROLLERS ofthe S T SLANT POLES stained with GREASE When reassembling refer to Fig 3 9 Fig REEL BELT LOADING RACK ASSY R amp L LOADING ASSYS ST SLANT POLE AS Y REMOVAL LOADING GEAR R TRIANGLE MARK ON LOADING GEAR L
28. suring 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 ADJ USMENT Fig 4 7 DATUM HOLE TAPE 21 Fig 46 BACK TENSION MEASUREMENT NOTE 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 Confirm that all of the three probes of the TENSION METER are in contact with the TAPE During this process don t touch any other parts of the MECHANISM i e MAINBASE tis recommended that this measurement be repeated at least three times for an accurate reading 25 4 3 MECHANICAL MODE OPERATING VCR WITHOUT A CASSETTE TAPE a Remove the FRONT LOADING MECHANISM from the DECK MECHANISM b Pull the RACK c The S T POLE BASES are loaded and PLAY BACK MODE starts d Tum off the power when the MECHANISM is in the desired position 4 4 TENSION POLE POSITION ADJ USTMENT a MAKE MECHANICAL MODE be PLAY MODE Referto 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 ADJ UST CAP clockwise or counter clockwise until the two datum hole are aligned with each other DATUM HOLE OF MAIN BAS
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