Service manual

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SERVICE MANUAL

Design and specifications are subject to change without notice.

MVT2195B

COLOR TELEVISION/VIDEO CASSETTE RECORDER

ORIGINAL

MFR’S VERSION A

Summary of content (64 pages)

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MVT2195B SERVICE MANUAL COLOR TELEVISION/VIDEO CASSETTE RECORDER ORIGINAL MFR’S VERSION A Design and specifications are subject to change without notice.
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MVT2195B SERVICE MANUAL COLOR TELEVISION/VIDEO CASSETTE RECORDER REVISION 1 MFR’S VERSION C MFR’S VERSION M2003 IC1001 A EP14BD OEC7043A C F20EL82 OEC7043B Please file this revision with the original version.
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Change of MICRO MOTOR DIFFERENCES MFR'S VERSION A REF. NO. M2003 PART NO. MFR'S VERSION C DESCRIPTION 1589V11007 MICRO MOTOR EP14BD PART NO. 1589311005 DESCRIPTION MICRO MOTOR F20EL82 MFR'S VERSION A REF. NO. CD1002 CP1005 PCB010 PART NO. MFR'S VERSION C DESCRIPTION 122F051702 CORD, JUMPER 2F051702 CONNECTOR PCB SIDE 069J750029 IMSA-9604S-05Z14 A546A5A01A SYSCON PCB ASS'Y VMX180B PART NO.
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WAVEFORMS Y/C/AUDIO/HEAD AMP 1 PB 6 0.5V 20µs/div 2 POWER ON POWER ON 0.5V 10ms/div 7 POWER ON 1.0V 10µs/div 100mV 0.1µs/div 11 PB 0.5V 0.5ms/div 12 PB 1.0V 5ms/div POWER 3 PB 8 10mV 20us/div 4 REC 10.0V 5us/div 13 5.0V 20ms/div PB 1.0V 10ms/div 9 PB 14 500mV 5µs/div 1.0V 5ms/div DEFLECTION MICON 5 POWER ON 1.0V 20µs/div 10 PB 15 0.5V 5ms/div 1.0V 0.5ms/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
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WAVEFORMS 16 10.0V 5ms/div 21 50.0V 20µs/div 17 2.0V 20µs/div 18 200mV 20µs/div CRT 19 50.0V 20µs/div 20 50.0V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
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MECHANICAL EXPLODED VIEW 209 124 209 209 210 209 209 203 J801 123 209 PCB110 (CRT PCB) 203 114 203 L503 203 V801 133 104 201 108 201 PCB030 (OPERATION PCB) 113 107 110 202 106 105 111 112 A 101 109 103 102 I-1 SP351 201
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MECHANICAL EXPLODED VIEW 208 202 208 212 132 212 118 208 213 202 202 122 121 131 120 115 207 TU601 117 125 116 FB401 117 204 120 115 117 206 204 130 207 PCB010 (SYSCON PCB) 126 205 119 A 129 128 127 211 I-2
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CHASSIS EXPLODED VIEW (TOP VIEW) 503 367 300 503 510 M2003 UN4001 335 319 505 313 507 334 318 AA H5001 502 508 H5002 314 321 501 506 349 348 328 305 356 347 310 336 512 301 313 304 508 512 361 303 315 338 317 369 316 AA 355 AD AB 309 AA 320 AB AA 353 359 M101 AA 502 366 357 329 368 BA 366 358 306 364 515 509 502 AD AD 363 PCB550 (DECK PCB ASS'Y) 330 365 AD AA AD AD 351 362 323 324 AD AD 511 360 352 CLASS GREASE OIL PART NO.
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CHASSIS EXPLODED VIEW (BOTTOM VIEW) 302 300 M2001 511 AA 340 AA 514 AA 341 AA 344 503 511 350 513 AA 343 AA 322 332 345 346 514 339 AA 342 326 333 346 331 311 AA AA AD 307 AD AC 312 AB 354 327 308 325 AD AA AD 337 AA 504 CLASS GREASE OIL PART NO. MARK G-555G AA G-488M AB FL-721 AC MG-33 AD FL OIL No. 6115 BA NOTE: Applying positions AA, AB, AC, AD and BA for the grease or oil are displayed for this section.
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MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO.
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CHASSIS REPLACEMENT PARTS LIST REF. NO. 300 PART NO.
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ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO.
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ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO.
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ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO.
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SPEC.NO. M546-A5A O/R NO.
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TV BLOCK DIAGRAM MICON/ OPERATION/ DECK SCL SDA Q602, Q603 AT + 5V AT + 25V THERMAL PROTECTION Q606 AMP P. CON + 8V REG. REG. PUMP UP Q604, Q605 TU_AUDIO Y/C/AUDIO/ TU_VIDEO HEAD AMP/ Y/C_AUDIO IN/OUT CHROMA_VIDEO AT + 5V REG. CHROMA IC IC601 M61203BFP NC NC VCC 2 3 1 5 7 Q405 NC 63 48 52 IF AGC VCO 56 57 55 41 V. OUTPUT IC IC401 LA78040 33 39 46 42 13 Q406 H-DRIVE 53 H.
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Y/C/AUDIO/HEAD AMP/IN/OUT BLOCK DIAGRAM X4001 3.579545MHz Q4009 Y/C/AUDIO/CCD/HEAD AMP IC IC4001 LA71067M-MPB BUFFER NC 62 51 61 PULL VX01 H.SW H AGC AMP 83 88 2 SP-CH2 (L) CYL P SP-CH1 (R) C-LPF CLAMP P P R R 90 Main CONV B-UP AMP VCA YNR/ COMB 3.58M BPF2 P ACC AMP P CLAMP N.L. DEEM 3.58M BPF1 R KIL B.D. DELAY H H.
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MICON/OPERATION/DECK BLOCK DIAGRAM SW1001 2 3 1 4 TIMER SYSCON MICON IC IC1001 OEC7043A 50 TAB SW SYSTEM RESET IC IC1002 PST600H RESET-L 34 POWER_FAIL_L 85 X-OUT (12MHz) 39 X-IN (12MHz) 38 XC-OUT (32KHz) 36 XC-IN (32MHz) 35 CTL+ 95 CTL+ CTL- 94 CTL- V-REC-ST-H 66 V. REC_ST_H CVIN 56 SD_VIDEO OUT 3 POWER FAIL AT + 5V 1 P.
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PRINTED CIRCUIT BOARDS OPERATION SOLDER SIDE J701_1 W004 W005 C751 R766 OS753 W802 C755_1 CD351_1 D793 CD352 R754 R793 D792 R778 R761 W002 CD757 R774 R771 W001 SW796 R773 C752 C779 SW798 W815 SW795 SW793 R772 W008 W814 R350_1 SW792 C701 R775 R776 C781 W007 W811 R777 SW794 SW791 C382 W009 W003 W805 SW799 W006 SW751 W812 R351 J351 SW797 D791 DECK S101 CP101 SOLDER SIDE S105 S106 S104 Q101 S102 F-1 S103 F-2
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PRINTED CIRCUIT BOARDS SYSCON/CRT (INSERTED PARTS) SOLDER SIDE R8 R8 10 02 05 C P8 01 R490 2.
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F-5 R420_1 R813 R442_1 R444 C416 R601 C527 R667 R621 C687_1 C634 R630 R677 R631 R657 Q611 R634 R1051 R1008 R1036 C1041 C1022 C1031 81 Q1004 W895 C677 C637 R1020 31 R1024 R1019 R1087 Q609 C805 R816 C811 51 C1049 C1050 C1040 C1026 C1048 R1040 C1046 C1047 R1032 R662 R1009 C1062 C1038 C1071C1035R1034 R1033 C1034 R1031 C1061 C1060 R1006 R1002 C1039 R1042 IC 10 01 R1021 R1007 R1035 C1009 C1010 C1004 C1023 R1053 C1037 R1038 C1029 C1045 R4067 C1025 C1065 C1013 R1029 R1
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A B C D E F G H Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) FE HEAD(HOT) INPUT_SEL SP/LP/EP-H C4070 KA 6.3V 47 C4045 680 50V 1 KA F 0.1 C4044 C4036 8.2K 50V 2.2 KA R4044 50V 1 KA 47 46 45 44 43 42 41 39 L4007 0.01 38 37 1.5 C4053 0.01 B C4057 16V 47 KA NOTE: THE DC VOLTAGE AT EACH PART WAS MEASURED WITH THE DIGITAL TESTER DURING PLAYBACK B C 36 35 4.4 NC 0 DOC_XO_CTL INPUT_SEL COMP ENV_DET CHROMA_VIDEO C4075 330P B 4 H.SW 4.3 H.SYNC C4054 0.
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A B C D E F G H MICON SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO POWER 8 DEGAUSS_H SERVICE TP1001 NC 3.3K C1023 220P CH 1K 1M DUMMY_V.SYNC V.REC_ST_H 0 INPUT_SEL NC 0 C1046 20P CH L1001 2.2uH 2.6 2.5 R1040 42 C1047 18P CH FROM/TO CHROMA/IF 33K HD X-RAY_TEST VD 0 C1040 18P CH 7 2.1 SCL SDA C1048 18P CH 5.2 OSD_R C1026 0.1 B C1049 22P CH OSD_G X1002 32.768KHz 1.3 1.5 OSD_B OSD_BLK C1050 20P CH 5.
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A B C D E F G H IN/OUT SCHEMATIC DIAGRAM 8 8 6 GND 4 FRONT_VIDEO_IN 7 3 FRONT_AUDIO_IN 5 2 SOUND_GND 1 GND SP_OUT SOUND_OUT (CD351) CP353_1 173979-7 FROM/TO OPERATION 9 GND REMOCON_IN 10 5 6 4 KEY_A POWER_ON_L 7 8 AT+5V 3 T-REC_LED NC 2 KEY_B REC_LED 7 0.047 M 1.5K C4014_1 R4005 NC (CD757) CP757_2 1-173979-0 1 4 FROM/TO OPERATION 3 Y/C_VIDEO 2 GND P.CON+5V CP1003 173979-4 1 Y/C_AUDIO TEST POINT 2 1 GND 3 4 SCL 5 IIC_OFF SDA 6 B.
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A B C D E F G H CHROMA/IF SCHEMATIC DIAGRAM (SYSCON PCB) 8 8 11.0 C678_1 100 C674 120P CH 6.8uH R676 L612 220P B 1K R646 16V 10 KA 10K FROM/TO SOUND AMP D605 11ES1-EIC 2.2K VD 47K 0 R648 C690 330P CH 2.2K 0.1 C658 R652 0.22 B C688 4.7K C630 7.3 NC 0.082 B FROM/TO DEFLECTION 100P CH 0.1 B C660 4.9 16V 47 KA C659 4.9 5 GND D617 4.8 D616 2.0 C684 0 MTZJ6.8B C664 1 MMTS C668 0.001 CH MTZJ6.8B R641 18K 0.022 B R649 2.2K V_OUT ACL V_FEEDBACK 180V HEATER 8.
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A B C D E F G H SOUND AMP SCHEMATIC DIAGRAM 8 8 (SYSCON PCB) 7 7 FROM/TO IN/OUT SP_OUT W855 SOUND+ SOUND_GND (S802) FROM MICON 6 6 TV_A_MUTE TV_POWER_H FROM CHROMA/IF 5 5 AUDIO_OUT 8.2 3.5 6 SOUND AMP IC IC351 AN7511 5 0 3.4 7 8 + 4 R359 - 3 5.1 47K 2 0 1 0.3 3.9 C301 4 4 0.0047 B R353 3 R352 C355 R357 16V 10 KA 5.6K S107X C351 4.7K B 0.1 C353 SOUND_GND TO CHROMA/IF 16V 10 KA C354 W803 GND C356 SOUND+B 10V 2200 YK FROM POWER 50V 2.
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A B C D E F G H POWER SCHEMATIC DIAGRAM 8 8 (SYSCON PCB) 5A 125V 2.5A 250V 4A 125V CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE 5A 125V (F501,ICP501,ICP502,ICP503),2.5A 250V(F502), AND 4A 125V(ICP505). ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQUES D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME TYPE 5A 125V (F501,ICP501,ICP502,ICP503),2.5A 250V(F502), ET 4A 125V(ICP505). CAUTION: ICP501,ICP502,ICP503,AND ICP505 ARE LITTELFUSE INC.,TYPE 251.
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A B C D E F G H DEFLECTION SCHEMATIC DIAGRAM 8 8 (SYSCON PCB) V.OUTPUT IC IC401 LA78040 THERMAL PROTECTION AMP + PUMP UP GND 3.6 DRIVER Q402 2SB892 6 12.5 7 26.3 7 3.7 C406_1 35V100 MHE 11E1-EIC D401 5 0 47K R401 R415_1 V_FEEDBACK C403 HS401_1 763WSA0004 1.3 GND C424 BL01RN1-A63 100 1/4W ECWF C423 D413 RMPG06J C431 250V 10 YK C430_1 500V 0.001 B 68 1/4W R449 10 TO CRT B+ AFC HEA TER FOCUS F SCREEN S GND 0 11 ABL 7 3 0.
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A B C D E F G H CRT SCHEMATIC DIAGRAM (SYSCON PCB) 8 8 TP801 BLUE AMP Q804_1 132.5 2SC4217 7 R802 19 7 15K 2W R807 2.8 1/4W 132.9 2.7K 2.5 104.1 7 0 390 R814 132.5 8 0 9 0 10 6 11 5 132.8 FROM CHROMA/IF 6 10 GND 9 CUT_OFF 8 G.OUT 7 B.OUT 6 R.OUT S001Y 5 4 3 HEATER H_GND 2 1 5 180V 1 0 CP851B (CP851A) 51048-1000 6 F R811 GND J801 CVT3275-5102 4.7K CUT_OFF TP802 G.OUT B.OUT C809_1 R.OUT GREEN AMP Q805_1 2SC4217 132.
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A B C D E F G H OPERATION SCHEMATIC DIAGRAM 8 8 (OPERATION PCB) W802 7 9 GND 8 AT+5V 7 VOL UP SW796 KEY_A T-REC_LED 3 REC_LED 2 KEY_B SLZ-936C-11-S-T1 POWER/PLAY D792 T-REC D791 SLZ-936C-11-S-T1 270 R761 270 R793 C751 100P B 0.1 F C752 C755_1 6.3V 220 KA SKHVBED010 REW/REV SW794 SKHVBED010 FF/CUE SW793 SKHVBED010 PLAY SW792 1 NC 4 1 Vout HEADPHONE_JACK J351 HSJ2630-010070 POWER_ON_L 5 2 B+ 6 SKHVBED010 1.
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A B C D E F G H DECK SCHEMATIC DIAGRAM 8 8 (DECK PCB) LOADING MOTOR M101 7 7 S105 5.
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A B C D E F G H INTERCONNECTION DIAGRAM HEADPHONE JACK J351 8 H H 2 8 4 1 COMMAND TRANSMITTER TM101 1 3 E E FRONT AV JACK J701 5 4 3 OS753 FROM TM101 3 GND 2 TO OS753 2 B+ 6 6 6 GND FRONT_VIDEO_IN 7 2 2 1 MR FG SENSOR O VCC HALL HALL VCC IN OUT SWITCH LOGIC CP1004 CP501 1 ROTOR MAGNET 7 AC120V_60Hz CD501 BLADE WIDE MAIN COIL OPERATION PCB PCB030 TEXA28 7 4 6 3 SOUND_GND 4 FRONT_AUDIO_IN 5 2 SOUND_OUT 3 5 1 SP_OUT 2 CD351 GND 9 10 REMOCON_IN 10 1 8 G
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SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 6. AVOID AN X-RAY As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual. 2. AVOID AN ELECTRIC SHOCK There is a high voltage part inside. Avoid an electric shock while the electric current is flowing. 3.
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CONTENTS SERVICING NOTICES ON CHECKING ..................................................................................... HOW TO ORDER PARTS .......................................................................................................... CONTENTS ................................................................................................................................. GENERAL SPECIFICATIONS ..................................................................................................
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GENERAL SPECIFICATIONS G-1.Outline of the Product 19 inch(480.0mmV):Measured diagonally Color CRT 90 degree deflection 3 -Speed 1/2" Video Cassette Recorder VHS Recorder/Player VHS-C Player G-2.VCR Format VHS Standard NTSC PAL SECAM PAL-M PAL-N VHS Hi-Fi Audio System G-3.Video Recording System :Rotary, slant azimuth two head helical scan system Luminance Component :FM recording Chrominance Component :Low frequency converted direct recording G-4.Broadcasting System US System M G-5.
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GENERAL SPECIFICATIONS G-17.Tuner and Receiving channel 1Tuner System 2Tuner System Tuner : Contactless Electric tuner Oscar(W/O HYPER) Oscar(W/ HYPER) France CATV) Others Channel Coverage 2 ~ 69 , 4A , A-5 ~ A-1 , A~I , J ~ W , W+1~ W+84 Tuning System Frequency syn. Voltage syn. Others G-18.Preset Channel: G-19.Intermediate Frequency Picture(FP) Sound (FS) FP-FS -- channels 45.75 MHz 41.25 MHz 4.50 MHz G-20.Stereo/Dual TV Sound Yes( NICAM MHz MHz MHz GERMAN USA MHz MHz MHz JAPAN) No G-21.
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GENERAL SPECIFICATIONS G-26.Power Consumption: Stand by: Per Year: G-27.Dimensions(Approx.) 489 mm(W) G-28.Weight(Approx.) 86 W at AC 120 V 60 Hz -- W at DC --V(at TV and VCR ON) 5 W at AC 120 V 60 Hz -- kWh / Year 462.5 mm(D) Net : Gross: G-29.Cabinet Material Cabinet Front: Cabinet Rear: 479.5 mm(H) 22.0 Kg ( 48.7 lbs) 25.0 Kg ( 55.3 lbs) PS ABS 94HB 94V2 94V0 DECABROM NON-DECA PS ABS 94HB 94V2 94V0 DECABROM NON-DECA G-30.
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GENERAL SPECIFICATIONS G-38.Terminals VHF/UHF Antenna Input Din Type F-Type Front Video Input (RCA ø8.3) Front Audio Input (RCA ø8.3) Rear Video Input (RCA ø8.3) Rear Audio Input (RCA ø8.3) Rear Video Output (RCA ø8.3) Rear Audio Output (RCA ø8.3) 21 Pin DC Jack 12V (Center + ) AC Inlet Ext. Speaker Diversity Ear Phone Head Phone G-39.Indicator Power Stand By Rec/Otr T-Rec (Red) ( ) (Red) (Red) On Timer OTPB ( ) ( ) G-40.
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GENERAL SPECIFICATIONS G-44.
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GENERAL SPECIFICATIONS G-49.Remote Control Unit: RC-CG Glow in Dark Remocon Yes Power Source: D.C 3 V Battery UM - 4 x 2 Control Key: Total 41 Key 0 Ch Up 1 Ch Down 2 Volume Up 3 Volume Down 4 Input Select 5 Audio Select 6 TV/VCR 7 Pause/Still 8 Slow 9 Slow Speed Up Menu Slow Speed Down Set Up Skip Search Set Down Speed Enter TV Monitor Cancel Index Call Program Muting Video Plus Sleep Timer Program/Video Plus Quick View A3- 6 No Power Eject Play Stop F.
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DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS CRT PCB Front Cabinet 1-1: BACK CABINET (Refer to Fig. 1-1) 1. Remove the 6 screws 1. 2. Remove the screw 2 which are used for holding the Back Cabinet. 3. Remove the AC cord from the AC cord hook 3. 4. Remove the Back Cabinet in the direction of arrow. Front Cabinet 1 1 Fig. 1-2 1 1-3: VCR BLOCK (Refer to Fig. 1-3) 1 1 1. Remove the 2 screws 1. 2. Disconnect the following connectors: (CP757, CP353, CP401 and CP502). 3.
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DISASSEMBLY INSTRUCTIONS 1-4: DECK SHIELD PLATE, DECK CHASSIS AND BOTTOM SHIELD (Refer to Fig. 1-4) 1-5: SYSCON PCB (Refer to Fig. 1-5) Remove the 3 screws 1. Remove the 3 screws 2. Remove the Deck Shield Plate in the direction of arrow (A). Disconnect the following connectors: (CP1004, CP1005, CP1006, CP4001, CP4002 and CP4003). 5. Remove the Deck Chassis in the direction of arrow (B). 6. Remove the screw 3. 7. Remove the Bottom Shield in the direction of arrow (C). 1. 2. 3. 4. 1. Remove the screw 1. 2.
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DISASSEMBLY INSTRUCTIONS 2. REMOVAL OF DECK PARTS NOTE 2-1: TOP BRACKET (Refer to Fig. 2-1) When you install the Tape Guide L, install as shown in the circle of Fig. 2-3-B. (Refer to Fig. 2-3-B) 1. Remove the 2 screws 1. 2. Slide the 2 supports 2 and remove the Top Bracket. NOTE Tape Guide L When you install the Top Bracket, install the screw (1) first, then install the screw (2). REC Lever (2) (1) 1 1 Top Bracket Top Bracket • The REC Lever is not installed on the Video Cassette Player. Fig.
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DISASSEMBLY INSTRUCTIONS 2-6: LINK ASS'Y (Refer to Fig. 2-6) 2-9: TENSION ASS'Y (Refer to Fig. 2-9-A) 1. Set the Link Ass'y to the Eject position. 2. Remove the (A) side of the Link Ass'y first, then remove the (B) side. 1. Move the Inclined S Ass'y to the back side. 2. Remove the Tension Spring. 3. Unlock the support 1 and remove the Tension Arm Ass'y. 4. Remove the Tension Adjust. 5. Unlock the 2 supports 2 and remove the Tension Band Ass'y. 6. Unlock the support 3 and remove the Tension Holder. 7.
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DISASSEMBLY INSTRUCTIONS 2-11: S REEL/T REEL (Refer to Fig. 2-11) NOTE 1. Remove the S Reel and T Reel. 2. Remove the 2 Polyslider Washers 1. 1. Do not touch the Pinch Roller. (Use gloves.) 2. When you install the Pinch Roller Block, install as shown in the circle of Fig. 2-12-B. (Refer to Fig. 2-12-B) NOTE 1. Take care not to damage the gears of the S Reel and T Reel. 2. The Polyslider Washer may be remained on the back of the reel. 3. Take care not to damage the shaft. 4.
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DISASSEMBLY INSTRUCTIONS 2-15: AHC ASS'Y/CYLINDER UNIT ASS'Y (Refer to Fig. 2-15) 1 Middle Gear 1. Unlock the support 1 and remove the AHC Ass'y. 2. Remove the 3 screws 2. 3. Remove the Cylinder Unit Ass'y. E-Ring Main Cam NOTE Pinch Roller Cam When you install the Cylinder Unit Ass'y, tighten the screws from (1) to (3) in order while pulling the Ass'y toward the left front direction. 2 Joint Gear P5 Cam AHC Ass'y Fig.
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DISASSEMBLY INSTRUCTIONS 2-19: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-19-A) 2. When you install the Clutch Actuator, install as shown in the circle of Fig. 2-19-C. (Refer to Fig. 2-19-C) 1. Remove the E-Ring 1 and remove the Main Loading Gear. 2. Remove the Capstan Brake Spring. 3. Slide the Main Rod and remove the Capstan Brake Ass'y. 4. Remove the Main Rod, Tension Lever, Clutch Actuator, Idler Arm Ass'y. 5. Remove the screw 2. 6. Remove the LED Reflecter. 7.
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DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction to remove the other. 3. REMOVAL OF ANODE CAP Read the following NOTED items before starting work. * * NOTE After turning the power off there might still be a potential voltage that is very dangerous. When removing the Anode Cap, make sure to discharge the Anode Cap's potential voltage. Do not use pliers to loosen or tighten the Anode Cap terminal, this may cause the spring to be damaged.
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KEY TO ABBREVIATIONS A A/C ACC AE AFC AFT AFT DET AGC AMP ANT A.PB APC ASS'Y AT AUTO A/V B BGP BOT BPF BRAKE SOL BUFF B/W C C CASE CAP CARR CH CLK CLOCK (SY-SE) COMB CONV CPM CTL CYL CYL-M CYL SENS D DATA (SY-CE) dB DC DD Unit DEMOD DET DEV E E EF EMPH ENC ENV EOT EQ EXT F F FBC FE FF FG FL SW FM FSC FWD G GEN GND H H.P.
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KEY TO ABBREVIATIONS S SYNC SYNC SEP T TR TRAC TRICK PB TP U UNREG V V VCO VIF VP V.PB VR V.
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SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter SERVICE MODE, unplug AC cord till lost actual clock time. Then press and hold Vol (-) button of main unit and remocon key simultaneously. The both pressing of set key and remote control key will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On. Set Key Remocon Key VOL. (-) MIN 0 Releasing of V-CHIP PASSWORD.
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PREVENTIVE CHECKS AND SERVICE INTERVALS The following standard table depends on environmental conditions and usage. Unless maintenance is properly carried out, the following service intervals may be quite shortened as harmful effects may be had on other parts. Also, long term storage or misuse may cause transformation and aging of rubber parts. Time Parts Name 500 hours 1,000 hours 1,500 hours 2,000 hours 3,000 hours Notes Audio Control Head Clean those parts in contact with the tape.
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PREVENTIVE CHECKS AND SERVICE INTERVALS CLEANING NOTE 2. TAPE RUNNING SYSTEM After cleaning the heads with isopropyl alcohol, do not run a tape until the heads dry completely. If the heads are not completely dry and alcohol gets on the tape, damage may occur. When cleaning the tape transport system, use the gauze moistened with isopropyl alcohol. 3. CYLINDER Wrap a piece of chamois around your finger. Dip it in isopropyl alcohol. Hold it to the cylinder head softly.
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NOTE FOR THE REPLACING OF MEMORY IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. NOTE: Initial Data setting will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On.
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SERVICING FIXTURES AND TOOLS (For 2 heads model) VHS Alignment Tape JG001 (VN 2 S-LI6 3 ) JG001A (VN 2 S-CO13 ) JG001Q (VN 2 S-LI6 3 H) JG001T (VN 2 S-X6 3 ) (For 4 heads model) VHS Alignment Tape JG001B (VN 1 S-LI6 3 ) JG001I (VN 1 S-CO13 ) JG001P (VN 1 S-LI6 3 H) JG001S (VN 1 S-X6 3 ) JG002B Adapter JG002E Dial Torque Gauge (10~90gf•cm) JG002F (60~600gf•cm) JG005 Post Adjustment Screwdriver Part No.
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MECHANICAL ADJUSTMENTS 1-2: CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION 1. CONFIRMATION AND ADJUSTMENT Read the following NOTES before starting work. 1. Set to the PLAY mode. 2. Adjust the Tension Adjust until the edge of the Tension Arm is positioning within 0.5mm range from the standard line center of Main Chassis. After this adjustment, confirm that the cut position is located in "A" area as shown in Fig. 1-2-B. If it is located in "B" area, adjust again. 3.
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MECHANICAL ADJUSTMENTS 1-4: CONFIRMATION OF VSR TORQUE 1. Operate within 4~5 seconds after the reel disk begins to turn. 2. Install the Torque Gauge (JG002F) and Adapter (JG002B) on the S Reel. Set to the Rewind mode. (Refer to Fig.1-4) 3. Then, confirm that it indicates 120~180gf•cm. 2. CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM NOTE Tape Running Mechanism is adjusted precisely at the factory. Adjustment is not necessary as usual.
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MECHANICAL ADJUSTMENTS 2-2: CONFIRMATION AND ADJUSTMENT OF AUDIO/ CONTROL HEAD 2-3: TAPE RUNNING ADJUSTMENT (X VALUE ADJUSTMENT) When the Tape Running Mechanism does not work well, adjust the following items. 1. Confirm and adjust the height of the Reel Disk. (Refer to item 1-1) 2. Confirm and adjust the position of the Tension Post. (Refer to item 1-2) 3. Adjust the Guide Roller. (Refer to item 2-1) 4. Confirm and adjust the Audio/Control Head. (Refer to item 2-2) 5.
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MECHANICAL ADJUSTMENTS 3. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE 5 6 4 3 7 2 1 8 9 10 1. Tension Adjust 2. Tension Arm 3. Guide Roller 4. P1 Post 5. Audio/Control Head 6. X value adjustment driver hole 7. P4 Post 8. T Brake Spring 9. T Reel 10.
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ELECTRICAL ADJUSTMENTS 1. BEFORE MAKING ELECTRICAL ADJUSTMENTS 2. BASIC ADJUSTMENTS (VCR SECTION) Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies. 2-1: PG SHIFTER 1. Connect CH-1 on the oscilloscope to TP1002 and CH-2 to pin 4 of CP1003. 2. Playback the alignment tape. (JG001A) 3. Press and hold the Tracking-Auto button on the remote control more than 2 seconds to set tracking to center. 4. Press the VOL.
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ELECTRICAL ADJUSTMENTS 2-3: RF AGC 2-8: HORIZONTAL PHASE 1. Receive a 70dB monoscope pattern. 2. Connect the digital voltmeter between the pin 5 of CP351 and the pin 1 (GND) of CP351. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (02) on the remote control to select "RF AGC". 4. Press the VOL. UP/DOWN button on the remote control until the digital voltmeter is 2.4 ± 0.05V. 1. Receive the center cross signal from the Pattern Generator. 2.
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ELECTRICAL ADJUSTMENTS 2-13: SUB TINT 2-15: OSD HORIZONTAL 1. Receive the color bar pattern. (RF Input) 2. Connect the synchro scope to TP803. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (16) on the remote control to select "TINT". 4. Press the VOL. UP/DOWN button on the remote control until the waveform becomes as shown in Fig. 2-2. 5. Receive the color bar pattern. (Audio Video Input) 6. Press the INPUT SELECT button on the remote control to set to the AV mode.
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ELECTRICAL ADJUSTMENTS 3.
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ELECTRICAL ADJUSTMENTS 4-3: STATIC CONVERGENCE 4. PURITY AND CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 4-2. NOTE 1. Receive the crosshatch pattern from the color bar generator. 2. Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets. 3. Combine red/blue (magenta) and green by adjusting the pair of 6 pole magnets. 1.