Samsung VR8460 Service Manual
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Samsung VR8460 Service Manual

Samsung VR8460 Service Manual

Chassis khan ii
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ELECTRONICS
This Service Manual is a property of Samsung Electronics Co .,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.
© Samsung Electronics Co., Ltd. DEC. 2003
Printed in Korea
AC82-00087A
VIDEO CASSETTE RECORDER
Chassis : Khan II
VR8460
SERVICE
If you want to know additional information which is not included on this Service Manual, please refer to the
VR8460 Training Manual (AC82-00088A).
VIDEO CASSETTE RECORDER
POWER
EJECT
REW
F.F
PLAY
REC
STOP
CHANNEL
MENU
Manual
CONTENTS
5. Block Diagram

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  • Page 1: Table Of Contents

    6. Schematic Diagrams STOP CHANNEL MENU © Samsung Electronics Co., Ltd. DEC. 2003 This Service Manual is a property of Samsung Electronics Co .,Ltd. Printed in Korea Any unauthorized use of Manual can be punished under applicable International and/or domestic law. AC82-00087A...

  • Page 2: Mode Switch (Program Switch) Assembly Point

    IMPORTANT SERVICE GUIDE ◆ MODE SWITCH (PROGRAM SWITCH) ASSEMBLY POINT 1) When installing the ass’y deck on the Main PCB, be sure to align the assembly point of mode switch. ASSEMBLY POINT Fig. 1 ◆ HOW TO EJECT THE CASSETTE TAPE (If the tape is stuck in the unit) 1) Turn the Gear Worm Œ...

  • Page 3: Precautions

    Alternatively, wear a discharging Wrist-strap device. (Be sure to remove it prior to applying power--this is an electric shock precaution.) Samsung Electronics...
  • Page 4 Always inspect for pinched, out- of-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that leads and components do not touch thermally hot parts. Samsung Electronics...

  • Page 5: Alignment And Adjustment

    2-1-1(a) Location of adjustment button of remote control POWER EJECT SLOW SHUTTLE X-Point (Tracking Center) Adjustment A.TRK REPLAY F.ADV/SKIP CH/TRK TV/VCR PREV.CH ENTER Head Switching Adjustment MENU NVRAM Option Setting Remote Control for adjustment is not supplied as a Service Jig. Fig. 2-1 Samsung Electronics...

  • Page 6: Test Location For Adjustment Mode Setting

    Alignment and Adjustments 2-1-1(b) TEST location for adjustment mode setting Short-Circuit for few seconds and release. (Just one time) Fig. 2-2 Main PCB (Top View) Samsung Electronics...

  • Page 7: Option Numbers

    33 34 35 36 37 38 39 40 MOVE : SAVE : ENTER MOVE : COMPLETE Fig. 2-3 Fig. 2-4 <Table 2-1 NVRAM Option Table> MODEL OPTION NUMBERS VR8460 2, 3, 4, 6, 7, 16, 21, 22, 28, 29 Samsung Electronics...

  • Page 8: Vcr Mechanical Adjustment

    Fig. 2-5 Location of Tape Transport Adjustment PINCH ROLLER FE HEAD CYLINDER ASS'Y GUIDE ROLLER "S" GUIDE ROLLER "T" POST TENSION #8 GUIDE POST #9 GUIDE POST #3 GUIDE POST MAIN BASE ACE HEAD CAPSTAN SHAFT Fig. 2-6 Tape Travel Diagram Samsung Electronics...

  • Page 9: Tape Transport System Adjustment

    HEIGHT ADJUST X-POSITION ADJUSTING SLIT SCREW (B) SCREW (D) AZIMUTH ADJUST X-POSITION LOCKING Fig. 2-7 Location of ACE Head Adjustment Screw AUDIO HEAD VIDEO HEAD 0 ~ 0 .25 mm CONTROL HEAD Fig. 2-8 ACE Head Height Adjustment Samsung Electronics...
  • Page 10 Fig. 2-9 Tape Guide Check c. AUDIO AZIMUTH ADJUSTMENT 1) Load alignment tape (Mono scope) and playback the 7KHz signal. 2) Connect channel-1 scope probe to audio output. 3) Adjust screw (B) to achieve maximum audio level. (See Fig. 2-7) Samsung Electronics...

  • Page 11: Ace Head Position (X-Point) Adjustment

    5) Insert the (-) driver into the X-Point adjustment hole and adjust it so that envelope waveform is maximum. Test point : TP2 (Audio Output) TP3 (Envelope) TP4 (H’D S/W -Trigger) TP5 (Control Pulse) AUDIO OUTPUT ENVELOPE HEAD SWITCHING Fig. 2-10 Location of Test point (Main PCB-Top View) Samsung Electronics...
  • Page 12 5) If the section B in Fig. 2-12 does not meet the specification, adjust the guide roller T up or down. a b c d c,b,d/a Fig. 2-11 Envelope Waveform Adjustment H'D SWITCHING PULSE ENVELOPE Fig. 2-12 Adjustment Points Samsung Electronics...
  • Page 13 ) driver to obtain a flat video RF envelope as shown in Fig. 2-13. IDEAL ENVELOPE S HEIGHT TOO HIGH S HEIGHT TOO LOW T HEIGHT TOO HIGH T HEIGHT TOO LOW GUIDE ROLLER S GUIDE ROLLER T Fig. 2-13 Guide Roller S, T Height Adjustment Samsung Electronics...
  • Page 14 2) If excessive tape wrinkle is observed, perform the following adjustments in Playback mode : ◆ Tape wrinkle at the guide roller S, T section : Linearity adjustment. ◆ Tape wrinkle at tape guide flange : ACE head assembly coarse adjustment. 2-10 Samsung Electronics...

  • Page 15: Reel Torque

    4) Transportation of accurate driving force is done by gears. (Gear Center Ass’y) Note : If the spec. does not meet the followings specifications, replace the holder clutch ass’y and then recheck. <Table 2-2> MODE TORQUE g/cm GAUGE 42 ± 11 Cassette Torquemeter 145 ± 30 Cassette Torquemeter Samsung Electronics 2-11...
  • Page 16 Alignment and Adjustments MEMO 2-12 Samsung Electronics...

  • Page 17: Exploded View And Parts List

    3-2 Mechanical Parts (Top Side) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-3 Mechanical Parts (Bottom Side) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Samsung Electronics...

  • Page 18: Cabinet Assembly

    Exploded View and Parts List 3-1 Cabinet Assembly Samsung Electronics...
  • Page 19 Exploded View and Parts List Loc. No Parts No. Description ; Specification Remark AC97-02337A ASSY-PANEL FRONT;HIPS HB,VR8460/XAA,SLIM AC64-01350A DOOR-CASSETTE;SV-475F,HIPS94HB,T1.0,-,W1 AC61-62032A SPRING ETC-MASK;SV-C130,SUS,4.4,-,-,-,-, AC64-01345A CABINET-TOP;VR8460,TEXTURE,T0.525,W360,L AC60-12126A SCREW-BH;-,-,FE,FZY,BH,-,-,4*12,-,- 6003-000275 SCREW-TAPTITE;BH,+,B,M3,L10,BLK ,SWCH101 AC60-10063A SCREW-TAPTITE;-,-,L12,ZPC3,+,-,M3,-,SWRC AC39-10200N CBF POWER CORD;EP2,SPT-2,AWG#18,1.8MT,WA AC92-01480A ASSY PCB-MAIN;VR8460,04-SEA,HI-FI CN303B 3809-001206 CABLE-FLAT;30V,-20to+80C,140mm,6P,1.25mm...

  • Page 20: Mechanical Parts (Top Side)

    3-2 Mechanical Parts (Top Side) G001 K490 K502 K530 G555 G530 B474 G450 G510 B473 G420 G480 K546 K250 K240 K248 B411 B410 K350 K110 B440 K182 B448 K340 K330 B452 G546 K470 K140 K188 G527 G070 G520 G060 Samsung Electronics...
  • Page 21 BAND-BRAKE ASS’Y;TS-10,-,-,-,-,-,- K330 AC66-30550A LEVER-S.BRAKE ASSY;-,POM+SUS,-,-,-,X-9 K340 AC66-30549A LEVER-T.BRAKE ASSY;-,POM+SUS,-,-,-,X-9 K350 AC61-00106A SPRING ETC-BRAKE;TS-10,SUS304-WPB,-,-,-, K470 AC66-00020A SLIDER-FL DRIVE;TS-10,SECC ,T1.0,-,-,SIL K490 AC97-02323A ASSY-HOLDER FL CASSETTE;SECC+POM,X-11,Fo K502 AC61-60561A SPRING ETC-FL.LEVER-LR;X-9,SUS304 WPB,OD K530 AC97-02324A ASSY-LEVER FL ARM;SECC+POM,X-11,For X-11 K546 AC61-50658A GUIDE-CASS. DOOR;X-9,POM,-,-,-,NTR Samsung Electronics...

  • Page 22: Mechanical Parts (Bottom Side)

    Exploded View and Parts List 3-3 Mechanical Parts (Bottom Side) G542 B462 B456 B460 B560 B500 B458 B464 B488 B484 B475 B468 K222 K200 K225 K221 B478 B570 Samsung Electronics...
  • Page 23 GEAR-LOADING DRIVE;X-11,POM(K300),-,-,-, B488 AC97-02195A ASSY-LEVER LOADING S;SECC+POM+SUS,X-11,F B500 AC97-02196A ASSY-LEVER LOADING T;SECC+POM+SUS,X-11,F B560 3101-001375 MOTOR-CAPSTAN;180rpm,80g.cm,12V,90mA B570 AC60-10514A SCREW-CAPSTAN;-,-,M2.6,L6,PH,+,-,-,-,- G542 AC66-60051A BELT-PULLEY;-,5CM-70,2 * 2,-,71.3,-,X-9 K200 AC61-21012A HOLDER-CLUTCH ASSY;X-9,ABS,-,-,-,BLK,- K221 AC66-20581A GEAR-CENTER ASSY;X-9,POM,M=O.5,-,-,GRY,- K222 AC60-30306A FASTENER-WASHER SLIT;-,-,ID2.1,OD5.0,T0. K225 AC66-00006A LEVER-UP DOWN;TS-10,POM,-,-,-,-,NAT,- Samsung Electronics...
  • Page 24 Exploded View and Parts List MEMO Samsung Electronics...

  • Page 25: Electrical Parts List

    2001-000515 R-CARBON;220OHM,5%,1/8W,AA,TP,1.8X3.2MM C629 2203-005221 C-CER,CHIP;15nF,10%,50V,X7R,TP,1608,- R1SS16 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM C630 2401-001492 C-AL;47uF,20%,16V,GP,-,5x7mm,2.5 VA1SS1 1405-001026 VARISTOR;470V,600A,9x7mm,TP C631 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ZD1SR1 0403-000571 DIODE-ZENER;UZP43B,40-46V,1000MW,DO-41,T C632 2203-001071 C-CER,CHIP;0.056NF,5%,50V,C0G,TP,1608 C633 2203-000140 C-CER,CHIP;1.5nF,10%,50V,X7R,TP,1608,- C634 2203-001071 C-CER,CHIP;0.056NF,5%,50V,C0G,TP,1608 This Document can not be used without Samsung’s authorization. Samsung Electronics...
  • Page 26 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM C352 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 R656 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM C353 2401-001250 C-AL;4.7uF,20%,35V,GP,TP,4x5,5 R660 2001-000010 R-CARBON;68KOHM,5%,1/8W,AA,TP,1.8X3.2MM C354 2203-001656 C-CER,CHIP;0.47nF,5%,50V,NP0,TP,1608 R661 2007-000078 R-CHIP;1Kohm,5%,1/10W,TP,1608 C355 2301-000110 C-FILM,LEAD-PEF;1.8nF,5%,100V,TP,7x3.0x6 R662 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM C356 2401-001492 C-AL;47uF,20%,16V,GP,-,5x7mm,2.5 This Document can not be used without Samsung’s authorization. Samsung Electronics...
  • Page 27 2007-001002 R-CHIP;510ohm,5%,1/10W,TP,1608 R518 2007-000084 R-CHIP;4.7Kohm,5%,1/10W,TP,1608 R344 2007-001002 R-CHIP;510ohm,5%,1/10W,TP,1608 R523 2007-000088 R-CHIP;7.5Kohm,5%,1/10W,TP,1608 R345 2001-000969 R-CARBON;75OHM,5%,1/8W,AA,TP,1.8X3.2MM R524 2001-000786 R-CARBON;47KOHM,5%,1/8W,AA,TP,1.8X3.2MM R348 2007-000086 R-CHIP;5.6Kohm,5%,1/10W,TP,1608 R525 2001-000786 R-CARBON;47KOHM,5%,1/8W,AA,TP,1.8X3.2MM R3D05 2007-000124 R-CHIP;2.2Kohm,5%,1/10W,TP,1608 R526 2007-000088 R-CHIP;7.5Kohm,5%,1/10W,TP,1608 This Document can not be used without Samsung’s authorization. Samsung Electronics...
  • Page 28 2001-000449 R-CARBON;2.2KOHM,5%,1/8W,AA,TP,1.8X3.2M R717 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 R718 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 R719 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 R720 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 R721 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 R722 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM R723 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM R724 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM R725 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM This Document can not be used without Samsung’s authorization. Samsung Electronics...

  • Page 29: Block Diagram

    5. Block Diagram Samsung Electronics This Document can not be used without Samsung’s authorization...
  • Page 30 Block Diagrams MEMO Samsung Electronics This Document can not be used without Samsung’s authorization...

  • Page 31: Schematic Diagrams

    6-5 TM-Block/Input-Output - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Samsung Electronics This Document can not be used without Samsung’s authorization...

  • Page 32: Block Identification Of Main Pcb

    Components identified with the mark have the special characteristics for safety. When replacing any of these components. Use only the same type. ◆ Block Identification of Main PCB Component Side Conductor Side Samsung Electronics This Document can not be used without Samsung’s authorization...

  • Page 33: S.m.p.s./Power

    Schematic Diagrams 6-1 S.M.P.S./Power Samsung Electronics This Document can not be used without Samsung’s authorization...

  • Page 34: Logic

    Schematic Diagrams 6-2 Logic Samsung Electronics This Document can not be used without Samsung’s authorization...

  • Page 35: Audio/Video

    Schematic Diagrams 6-3 Audio/Video Samsung Electronics This Document can not be used without Samsung’s authorization...

  • Page 36: Hi-Fi/Mts

    Schematic Diagrams 6-4 Hi-Fi/MTS Samsung Electronics This Document can not be used without Samsung’s authorization...

  • Page 37: Tm-Block/Input-Output

    Schematic Diagrams 6-5 TM-Block/Input-Output Samsung Electronics This Document can not be used without Samsung’s authorization...
  • Page 38 Schematic Diagrams MEMO Samsung Electronics This Document can not be used without Samsung’s authorization...

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