Aiwa HV-FX7700 Service Manual
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Aiwa HV-FX7700 Service Manual

Stereo video cassette recorder
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HV-FX7700, BA75
SERVICE MANUAL
STEREO VIDEO CASSETTE RECORDER
VIDEO CASSETTE RECORDER<935>
This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
(S/M Code No. 09-007-347-2T3).
HV-FX7700
HV-BA75
HV-GX935
BASIC VIDEO MECHANISM
<7700/75>
S/M Code No. 09-007-347-2R3
HV-GX935
: D33K-4HF/PAL(6721R-0250A)<7700/75>
: D33K-4HD/NP-VCR(6721R-0205A)<935>
Z
Z
Z

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  • Page 1 HV-FX7700 HV-BA75 HV-GX935 HV-FX7700, BA75 HV-GX935 SERVICE MANUAL BASIC VIDEO MECHANISM STEREO VIDEO CASSETTE RECORDER <7700/75> : D33K-4HF/PAL(6721R-0250A)<7700/75> VIDEO CASSETTE RECORDER<935> : D33K-4HD/NP-VCR(6721R-0205A)<935> This Service Manual is the "Revision Publishing" and replaces "Simple Manual" (S/M Code No. 09-007-347-2T3). S/M Code No. 09-007-347-2R3...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SPECIFICATIONS ............3 10. Base Assembly A/C Head ........70 ACCESSORIES LIST ............3 11. Brake Assembly S ............ 71 DISASSEMBLY INSTRUCTIONS ........4 12. Brake Assembly T ............ 71 SERVICE POSITION ............5 13. Arm Assembly Tension ..........71 VCR TEST TAPE INTERCHANGEABILITY TABLE ..

  • Page 3: Specifications

    SPECIFICATIONS <HV-FX7700, BA75> <HV-GX935> Video recording system Rotary 2 head helical scanning system Video recording system Rotary 2 head helical scanning system Video head Double azimuth 4 heads Video head 2 heads Tuner system Frequency synthesized tuner Tuner system Frequency synthesized tuner...

  • Page 4: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. Top Case Removal 4. Mechanism Removal (see Fig. 3) 1) Remove 4 screws holding the top case. 1) Disconnect the drum FF cable from the connector (PMD01) on the Main C.B. 2. Panel Front Removal (see Fig. 1) 2) Disconnect the ACE head FF cable from the connector 1) Release 7 tabs, and then remove the panel front.

  • Page 5: Service Position

    SERVICE POSITION To set the mechanism to the service position in active status: Insert a spacer as shown below: The service position can be set in the stable status without any defective contact. MAIN C.B MECHA SPARSER 60mm MAIN C.B D33 MECHANISM REAR PANEL SPARSER...

  • Page 6: Vcr Test Tape Interchangeability Table

    VCR TEST TAPE INTERCHANGEABILITY TABLE There are two types of the new allgnment tape CH-1B (for NTSC) and CH-2 (for PAL). On each tape four signals (1)-(4) are recorded for the times and in the order shown below. (1) : 8min. → (2) : 2min. → (3) : 5min. → (4) : 5min. The TTV-MP1 (for M-PAL), TTV-MS1 (for MESECAM) and TTV-S1 (for SECAM) allgnment tapes have the same contents as the previous tapes.

  • Page 7: Electrical Main Parts List

    ELECTRICAL MAIN PARTS LIST REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION C315 87-015-681-080 CAP,E 10-16V C316 87-015-681-080 CAP,E 10-16V S2-309-024-040 SENSORLTV-817B PHOTO COU C318 87-015-695-080 CAP,E 1.0-50V SI-SS4-310-00A IC,KA431AZ C320 87-015-695-080 CAP,E 1.0-50V SA-400-811-220 KA7552 C322 87-015-684-080 CAP,E 47-16V...
  • Page 8 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION PMK01 S5-618-43D-000 CONN,TUC-P05P 5P C828 87-015-684-080 CAP,E 47-16V<75,77> PMK02 S6-724-34B-000 CONN ASSY 5P-150 C832 87-015-684-080 CAP,E 47-16V PML01 S6-30R-2S0-11A CONN,2P C835 87-010-400-080 CAP,E 0.47-50V<75,77> PW101 S5-612-92B-000 GP390 LGC 3P STRAIG P C902 87-016-455-080 CAP,E 470UF-6.3V...

  • Page 9: Transistor Illustration

    COIL,10UH<75,77> L754 87-003-129-080 INDUCTOR,6800<75,77> L755 87-003-129-080 INDUCTOR,6800<75,77> X751 S5-290-219-000 X’TAL 18.432MHZ<75,77> TYPE MODEL NAME SUFFIX <77> HV-FX7700 <75> HV-BA75 <93> HV-GX935 TRANSISTOR ILLUSTRATION G D S E C B E C B E C B E C B KRA103M 2SA1980...

  • Page 10: Wire Harness Diagram

    WIRE HARNESS DIAGRAM P7M01 PM701 PMD01 PDM01 A.MUTE "H" D.CTL TU.A.L M.GND TU.A.R LOWER BBE A.OUT.R DRUM 12VT 5.1V BBE A.LOUT NICAM C.B <7700> P7M02 PM702 PMC01 PCM01 DATA MOTOR GND I-LIMIT CAPSTAN CAP CTL 12.3VA MOTOR CAP REV "L" TU.MONO.AUD 5.1V <7700,75>...

  • Page 11: Block Diagram

    BLOCK DIAGRAM-1 (POWER SECTION)

  • Page 12: Audio/Video Section

    BLOCK DIAGRAM-2 (AUDIO SIGNAL SECTION) <HV-GX935> JK901 MOD.A.OUT BUF.V.IN POWER/ TUNER TU.A.L SECTION TU.V.IN VIDEO OUT 1 VIDEO OUT 2 AUDIO OUT 1 AUDIO OUT 2 MONO A.IN AUDIO/ VIDEO SECTION PB AUDIO SIGNAL PB VIDEO SIGNAL REC AUDIO SIGNAL REC VIDEO SIGNAL...
  • Page 13 BLOCK DIAGRAM-3 (AUDIO SIGNAL-Hi-Fi AUDIO SECTION) <HV-FX7700/BA75> BUF.V.IN POWER/ TUNER TU.V.IN SECTION AUDIO IIC CLK SYSTEM IIC DATA OUT(R) SORTIE G CONTROL/ A.ENV SERVO/OSD IC801 LP REC MUTE "H" OUT(L) SORTIE D SECTION TDA9605H A.H/SW Hi-Fi AUDIO PROCESS IC901 JK901(1/2)
  • Page 14 BLOCK DIAGRAM-4 (VIDEO SECTION) IC301 LA71598M AUDIO/VIDEO Q304 PROCESSOR MAIN C. COMB CONV LP ’A’ PB DELAY Q303 C LPF LP ’B’ PB SP ’B’ PB DE EMP SP ’A’ PB PB FM IC7V1 LC74793 V. ENV DOUBLE VPS/PDC DECODER PB EQ SERIAL LIMIT...

  • Page 15: Scart<935

    BLOCK DIAGRAM-5 (NORMAL AUDIO SECTION) IC301 LA71598M AUDIO/VIDEO <935> PROCESS SCART SECTION FL301,Q311 AUDIO IN 2 BIAS AUTO CONTROL LINE BIAS Q307 MUTE AUDIO IN 1 Hi-Fi AUDIO/ SCART SECTION <7700,75> AUDIO REC/PB HEAD SCART SECTION <935> :REC AUDIO SIGNAL IC301 LA71598M AUDIO/VIDEO...
  • Page 16 BLOCK DIAGRAM-6 (TUNER, NICAM/A2 SECTION)
  • Page 17 BLOCK DIAGRAM-7 (SYSTEM CONTROL/SERVO SECTION) <HV-FX7700/BA75> MAIN (SYSTEM CONTORL/SERVO/OSD SECTION)C.B <7700,75> 9MT168GK 72,73 LOADING Hi-Fi AUDIO/ MOTOR UPD16311GC SCART DISPLAY DRIVER SECTION 83,107 POWER/ TUNER LOWER DRUM SECTION PDM01 84,108 IC501 HD6432197XA04F SYSCON/SERVO/OSD PROCESS CAPSTAN MOTOR PCM01 AUDIO/ VIDEO SECTION...
  • Page 18 BLOCK DIAGRAM-8 (SYSTEM CONTROL/SERVO SECTION) <HV-GX935> MAIN (SYSTEM CONTORL/SERVO/OSD SECTION)C.B <935> 7MT229GK 72,73 LOADING MOTOR UPD16311GC SCART DISPLAY DRIVER SECTION 83,107 POWER/ TUNER LOWER DRUM SECTION PDM01 84,108 IC501 HD6432197XA04F SYSCON/SERVO/OSD PROCESS CAPSTAN MOTOR PCM01 AUDIO/ A.LEVEL(R) VIDEO A.LEVEL(L) SECTION TSOP1238SP1 59,60 POWER/...
  • Page 19 SCHEMATIC DIAGRAM-1 (POWER/TUNER/NICAM SECTION) <HV-FX7700/BA75> MAIN(POWER/TUNER SECTION)C.B <7700,75> KRA18-02KFRB KTC3205 22uH SYSTEM ERA18-02KFRB CONTORL/ SERVO/OSD SECTION (DRUM) KRA103M Hi-Fi AUDIO/ LFS2020V4- KSR1003 22uH SCART 04350 SECTION KRA103M 10u/16V AUDIO/ ERC81-004L22 VIDEO SECTION KTA1267-GR SYSTEM KTA1273 CONTORL/ SERVO/OSD SECTION KRA103M KRC101M...
  • Page 20 SCHEMATIC DIAGRAM-2 (POWER/TUNER SECTION) <HV-GX935> MAIN(POWER/TUNER SECTION)C.B <935> KRA18-02KFRB KTC3205 22uH SYSTEM ERA18-02KFRB CONTORL/ SERVO/OSD SECTION (DRUM) KRA103M SCART LFS202014- 22uH KSR1003 SECTION 04350 KRA103M 10u/16V AUDIO/ ERC81-004L22 VIDEO SECTION KTA1267-GR SYSTEM KTA1273 CONTORL/ KRC101M SERVO/OSD SECTION KTA1273 KTC3199-BL AC INPUT 10u/16V :REC VIDEO SIGNAL NOTE)

  • Page 21: Audio/Video Section

    VOLTAGE CHART-2 (AUDIO/VIDEO SECTION) IC301 REC PIN REC PIN REC PIN 2.44 2.42 2.41 2.52 2.93 2.92 3.43 3.43 2.44 2.42 3.16 3.14 3.31 3.32 0.03 0.04 2.46 2.44 4.48 4.52 3.02 2.05 2.45 2.35 4.19 4.23 0.03 0.03 0.09 0.88 1.69 1.69...

  • Page 22: Ic Block Diagram

    WAVEFORMS-1 (AUDIO/VIDEO SECTION) IC301 Pin IC301Pin IC301 Pin IC301 Pin 38, 32, 31 4.2Vp-p 1.4Vp-p 500mVp-p 1Vp-p REC mode PB mode Video in PB/REC modes IC301 Pin IC301 Pin IC301 Pin IC301 Pin 2.2Vp-p 2.1Vp-p 400mVp-p 600mVp-p REC mode PB mode PB mode PB mode IC301 Pin...
  • Page 23 SCHEMATIC DIAGRAM-3 (AUDIO/VIDEO SECTION) R321 MAIN(AUDIO/VIDEO SECTION)C.B 1.2K:<7700,75> 1k:<935> (7/10) (3/10) (4/10) (5/10) (6/10) R3A1 47K:<7700,75> FULL ERASE HEAD JUMPER:<935> R3B1 5.1K:<7700,75> 3.3K:<935> SYSTEM CONTROL/ SERVO/OSD SECTION AUDIO/VIDEO PROCESSOR (2/10) AUDIO/CTR HEADS <7700,75> <7700,75> Hi-Fi AUDIO/ SCART SECTION <935> CYL.HEADS <7700,75>...
  • Page 24 SCHEMATIC DIAGRAM-4 (Hi-Fi AUDIO/SCART SECTION) <HV-FX7700/BA75> MAIN(Hi-Fi AUDIO/SCART SECTION)C.B <7700,75> POWER/ TUNER AUDIO SECTION OUT(R) SORTIE G AUDIO/ OUT(L) SORTIE D VIDEO SECTION GDZJ13A IC901 SYSTEM MM1443XJ CONTROL/ 47/16 SERVO/OSD INPUT SELECT SW GDZJ13A SECTION JK901(1/2) Hi-Fi AUDIO PROCESSOR 1/50...

  • Page 25: Voltage Chart

    VOLTAGE CHART-3 SCHEMATIC DIAGRAM-5 (SCART SECTION) <HV-GX935> (Hi-Fi AUDIO/SCART SECTION) IC801 MAIN(SCART SECTION)C.B <935> 11.9 12.0 IC801(TDA9605H) POWER/ TUNER SECTION L801 ZD801 GDZJ5.1B ZD802 C832 GDZJ5.6B 47/16 JK901 IC901 POWER/ 1/50 TUNER SECTION IC901(MM1443) 11.6 11.6 11.7 11.6 11.6 11.7 WIRE IC BLOCK DIAGRAM-3 IC, MM1443XJ...
  • Page 26 SCHEMATIC DIAGRAM-6 (SYSTEM CONTROL/SERVO SECTION) <HV-FX7700/BA75> MAIN(SYSTEM CONTROL/SERVO/OSD SECTION)C.B <7700,75> 9MT168GK (3/3) DISPLAY (9/9) KEY 1 C.B KEY 2 C.B PKM01 PKM02 LOADING MOTOR DRIVE -10PC EEPROM J502 (2/5) (2/5) (4/5) (2/9) (7/9) LOADING GDZJ6.8C MOTOR (3/5) PMJ01 FLD DATA MS...
  • Page 27 VOLTAGE CHART-4 (SYSTEM CONTROL/SERVO SECTION) IC501 REC PIN REC PIN REC PIN 2.45 2.47 5.15 5.15 3.37 3.37 1.44 2.54 2.42 2.42 2.42 5.26 5.26 5.25 5.25 2.54 2.44 5.05 5.05 PULSE PULSE 83 103 PULSE PULSE 2.54 2.35 2.30 PULSE PULSE 84 2.78 2.79 104 PULSE PULSE...
  • Page 28 WAVEFORMS-2 (SYSTEM CONTROL/SERVO SECTION) CTL+ CTL– V.H/SW DV-SYNC (IC501 Pin (IC501 Pin (IC501 Pin (IC501 Pin 1V/10mS 1V/10mS 1V/10mS 1V/100µS REC/PB modes QUE/REV modes V-IN (IC501 Pin (IC501 Pin (IC501 Pin (IC501 Pin 1V/1mS 1V/10mS 1V/10mS 500mV/20µS REC/PB mode REC/PB modes C-SYNC V-OUT (IC501Pin...
  • Page 29 SCHEMATIC DIAGRAM-7 (SYSTEM CONTROL/SERVO SECTION) <HV-GX935> MAIN(SYSTEM CONTROL/SERVO/OSD SECTION)C.B <935> 7MT229GK DISPLAY (3/3) (9/9) KEY 1 C.B KEY 2 C.B PKM02 PKM01 LOADING MOTOR DRIVE -10PC EEPROM (2/4) (2/4) (4/5) (2/9) (7/9) LOADING GDZJ6.8C MOTOR (3/5) PMJ01 FLD DATA MS AUDIO/VIDEO SECTION FLD DATA SW...

  • Page 30: Fl Display

    FL DISPLAY-2 <HV-GX935> FL DISPLAY-1 <HV-FX7700/BA75> • GRID ASSIGNMENT • GRID ASSIGNMENT • ANODE CONNECTION • ANODE CONNECTION...

  • Page 31: Main C.b <935

    WIRING-1 (MAIN C.B) <HV-FX7700/BA75> JK801 ENTREE AUDIO ANTENNE AC INPUT CAPSTAN AERIAL LOADING LOWER DRUM AUDIO/CTL MOTOR SORTIE G OUT L PDM01 HEAD PCM01 MOTOR JK901(1/2) JK901(2/2) CYL.HEADS SORTIE EURO AV1 EURO AV2 MAIN C.B SORTIE D OUT R ANTENNE...
  • Page 32 WIRING-2 (MAIN C.B) <HV-GX935> ENTREE ANTENNE AERIAL CAPSTAN AC INPUT LOWER DRUM AUDIO/CTL MOTOR LOADING PDM01 HEAD JK901 PCM01 MOTOR CYL.HEADS SORTIE EURO AV1 ANTENNE MAIN C.B AUDIO/VIDEO RF.OUT PMD01 P3D02 PMC01 PML01 P3D01 J9B2 R7M1 C7M1 C714 R7M3 C713 R7M2 C7M6 C7M2...

  • Page 33: Key1 C.b <7700/Ba75

    WIRING-3 (KEY1 C.B) <HV-FX7700/BA75> SCHEMATIC DIAGRAM-8 (KEY1 SECTION) <HV-FX7700/BA75> KEY 1 C.B <7700,75> KEY 1 C.B SW907 SW908 SW909 PLAY REW/ /F.FWD SW909 SW907 /F.FWD REW/ SW911 EJECT SW908 PLAY SW905 REC/OTR SW905 SW906 SW910 SW911 REC/OTR PAUSE/STILL STOP EJECT...

  • Page 34: Key1 C.b <935

    SCHEMATIC DIAGRAM-10 (KEY1 SECTION) <HV-GX935> WIRING-5 (KEY1 C.B) <HV-GX935> KEY 1 C.B <935> KEY 1 C.B SW906 PAUSE/STILL SW905 REC/OTR SW907 /REW SW909 /F.FWD SW908 PLAY MAIN C.B SW910 SYSTEM STOP/EJECT CONTROL/ SERVO/OSD SW906 SW908 SW910 SW912 SECTION PAUSE/STILL PLAY STOP/EJECT PMK01 CHANNEL...

  • Page 35: Nicam C.b

    WIRING-7 (NICAM C.B) NICAM C.B E C B E C B MAIN C.B MAIN C.B PM701 PM702...

  • Page 36: Adjustment

    ADJUSTMENT Test Equipment • Oscilloscope • Test Tape • AC Millivolt Meter TTV-P1 Adjustment Location MAIN C.B (TOP VIEW) TU701 P3D01 P3D02 T101 IC301 PMC01 MS501 H/SW IC501 W503 W502 IC5F1 PMK02...
  • Page 37 1. Servo Adjustment 1) PG Adjustment MODE MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION PLAY VIDEO OUT 'PLAY' KEY (SET) 6.5H ± 0.5H (TTV-P1) H/SW (W502, W503) 'O' KEY (REMOCON) • Adjustment Procedure 1. Insert the PAL SP Test Tape (TTV-P1) and play. Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the “ATR”...

  • Page 38: Ic Description

    IC DESCRIPTION IC, HD6432197X Pin No. Pin Name Description SVss – Servo Block GND CTLref Svcc/2 output, and CTL amp reference voltage input CTL(+) CTL(+) input/output CTL(–) CTL(-) input/output CTL BIAS CTL amp bias voltage CTL FB CTL feedback SW control CTL AMP (O) CTL primary amp output CTL SMT(I)
  • Page 39 Pin No. Pin Name Description R/C IN Remote input S Canal C + & 2nd pass 16 : 9 detector – Not connected VCR 'H' TV/VCR control output REC 'H' Recording current control output OSD 'H' OSD color control in YC SECAM/MESECAM mode T/UP REEL Take-up reel input CAP.
  • Page 40 Servo monitor 1 CST SW CST SW/REC Tab input AV link data input AV link data output BBE 'L' BBE: AIWA RGB PATH: AKAI SUP. REEL Supply reel input TU. SEC VL 'H' Tuner SECAM VHF-L band switching control TU. SEC 'H'...
  • Page 41 IC, PD16311GC-AB6 Pin No. Pin Name Description 1 ~ 4 SHTL1 ~SHTL4 4-bit general-purpose input pins Serial data output. DATA OUT Lower bits are first output synchronized with the trailing edge of shift clock. (The output is Nch open drain.) Serial data input.

  • Page 42: Mechanical Exploded View 1/1

    MECHANICAL EXPLODED VIEW 1/1...

  • Page 43: Mechanical Main Parts List 1/1

    DECK ASSY,D33K(4HF, PAL)<75,77> A43 S7-21R-F09-5D0 PANEL ASSY,FRONT BFA203P<93> A43 S7-21R-F13-5C0 PANEL ASSY,FRONT(7700Z)<77> A43 S7-21R-F13-5M0 PANEL ASSY,FRONT(BA75Z)<75> TYPE MODEL NAME SUFFIX <77> HV-FX7700 <75> HV-BA75 <93> HV-GX935 COLOR NAME TABLE Basic color symbol Color Basic color symbol Color Basic color symbol...

  • Page 44: Mechanism Exploded View 1/3~3/3

    MECHANISM EXPLODED VIEW 1/3...

  • Page 45: Mechanism Main Parts List 1/3~3/3

    115 S9-70R-005-0A0 SPRING SWITCH 116 S5-10R-002-0A0 LEVER SWITCH ——— SPR,PLATE 426 87-261-094-410 PAN HEAD SCREW 3-6 A21 S9-31R-003-1A0 HOLDER ASSY A22 S8-11R-001-8A0 BRACKET ASSY DOOR A23 S2-61R-001-6A0 ARM ASSY F/L TYPE MODEL NAME SUFFIX <77> HV-FX7700 <75> HV-BA75 <93> HV-GX935...
  • Page 46 MECHANISM EXPLODED VIEW 2/3...
  • Page 47 SCREW,PAN HEAD 3.0-8.0 504 S3-540-01B-000 WASHER,P.S 3.1-6-0.5 505 S8-790-19K-000 FFC,7P ——— DRUM ASSY D33 2CH<93> ——— DRUM ASSY D33-6CH<75,77> A03 S2-61R-001-5A0 CLEANER ARM ASSY A04 S8-11R-001-9A0 BRACKET ASSY L/D MOTOR TYPE MODEL NAME SUFFIX <77> HV-FX7700 <75> HV-BA75 <93> HV-GX935...
  • Page 48 MECHANISM EXPLODED VIEW 3/3...
  • Page 49 SCREW,PAN HEAD 2.6-6.8 426 87-261-094-410 PAN HEAD SCREW 3-6 517 SW-ZZR-000-4B0 WASHER STOPPER 518 SW-ZZR-000-4A0 WASHER STOPPER 519 SW-ZZR-000-4D0 WASHER STOPPER<75,77> A11 S4-70R-002-8A0 GEAR ASSY P3 A12 S4-70R-002-6A0 GEAR ASSY P2 TYPE MODEL NAME SUFFIX <77> HV-FX7700 <75> HV-BA75 <93> HV-GX935...

  • Page 50: Deck Mechanism Parts Locations

    DECK MECHANISM PARTS LOCATIONS Top View Pracedure Fig- Part Fixing Type Starting Drum Assembly 3 Screws , Cap FPC A-1 Plate Assembly Top Two Hooks Bracket Side ’L’ 5 Holder Assembly CST Chassis Hole 6 Bracket Assembly Door Guide CST 2 Hooks Plate Assembly 2 2,3,4...

  • Page 51: Deck Mechanism Disassembly

    DECK MECHANISM DISASSEMBLY (S2) (S2) Stator (S3) Drum Motor (S3) Rotor Drum Sub Assembly (Fig. A-1-1) Drum FPC (S1) (S1) (S1) Optional Parts Holder FPC Holder FPC Holder FPC (only for 2HD Models) (only for 4HD-Mono Models) (only for 4HD-Hi-Fi Models) Cap FPC (Fig.

  • Page 52: Plate Assembly Top

    DECK MECHANISM DISASSEMBLY Plate Assembly Top (Fig. A-2-1) Holder Assembly CST Lever Stopper(R) (Fig. A-2-2) Arm Assembly F/L (Fig. A-2-6) Arm F/L Lever Assembly S/W (Fig. A-2-7) (S4) (H5) Bracket Side (L) (S4) (Fig. A-2-4) Groove Gear Rack F/L Groove Bracket (For Jog Shuttle Models) Assembly Door...
  • Page 53 DECK MECHANISM DISASSEMBLY 2. Plate Assembly Top (Fig. A-2-1) 1) Unhook the (H1) and separate the Left Side. 2) Unhook the (H2) and lift up the Plate Assembly Top. NOTE (1) When reassembling, confirm (A),(B) Part of the Plate (H4) Assembly Top is inserted to the (L),(R) Grooves of the (H3) Bracket Side(L) and Bracket Assembly Door.

  • Page 54: Arm Assembly Cleaner

    DECK MECHANISM DISASSEMBLY Arm Assembly Cleaner (Fig. A-3-1) (S5) Base Assembly A/C Head ( H1) (Fig. A-3-3) (Fig. A-3-2) Head F/E (For Jog Shuttle Models) Fig. A-3 8. Arm Assembly Cleaner(Fig. A-3-1) NOTE 1) Break away the (A) part shown above Fig. A-3-1 from the (1) Place the Spring Lever S/W of the above (No.1) as Embossing of the Chassis in the clockwise direction and original position.

  • Page 55: Brake Assembly S

    DECK MECHANISM DISASSEMBLY Spring S Brake Brake Assembly S (Fig. A-4-1) Arm Assembly Tension Reel T Spring Tension (Fig. A-4-5) Band Assembly (Fig. A-4-3) Spring T Brake Tension Reel S Brake Assembly T (Fig. A-4-2) (Fig. A-4-4) (For Jog Shuttle Models) Fig.

  • Page 56: Support Cst

    DECK MECHANISM DISASSEMBLY Opener Lid (Fig. A-5-3) Arm Assembly T/up (Fig. A-5-4) Assembly Pinch Base Assembly P4 (Fig. A-5-5) Support CST (Fig. A-5-1) (Fig. A-5-2) Fig. A-5 15. Support CST (Fig. A-5-1) NOTE 1) Break away the (A) part shown above Fig. A-5-1 from the (1) When reassembling, confirm the opener lid is placed on Embossing of the Chassis in the clockwise direction, and the Hook(H1) of the Arm Assembly T/UP as below figure.

  • Page 57: Belt Capstan/Motor Capstan

    DECK MECHANISM DISASSEMBLY Belt Capstan (Fig. A-6-1) Motor Capstan Washer(W1) Clutch Assembly D33-K (Fig. A-6-3) (Fig. A-6-2) Washer(W2 ) Optional Parts Gear H-Up/D-K Gear Up/D-K Lever F/R (For Hi-Rewind Models) (For Normal Models) (Fig. A-6-4) Hook(H1) Spring Up/D Brake Assembly Capstan (For 4HD Models) (Fig.

  • Page 58: Bracket Assembly Jog

    DECK MECHANISM DISASSEMBLY Brake Assembly Capstan Hole (A)+(B) Barke Assembly Capstan Gear Cam (H2) (For 4HD Models) Spring Capstan (Fig. A-7-4) Hole (A) Guide Rack F/L (H1) Barke Assembly Jog (S4) (S4) (For Jog Shuttle Models) (Fig. A-7-2) Gear Rack F/L (Fig.

  • Page 59: Gear Drive/Gear Cam/Gear Connector

    DECK MECHANISM DISASSEMBLY Washer (W1) Gear Drive (Fig. A-8-1) Gear Cam Hole (B) (Fig. A-8-2) Brake Assembly Capstan (For 4HD Models) Gear Connector Hole (A) (Fig. A-8-3) Gear Connector Hole (A')+(A) Hole (B') Hole (A') Chassis Bracket Assembly L/D Motor Hole (B')+(B) (Fig.

  • Page 60: Gear Sector

    DECK MECHANISM DISASSEMBLY Washer (W1) Gear Sector (S4) (Fig. A-9-1) Base Tension Plate Slider (Fig. A-9-2) (Fig. A-9-3) Lever Tension (Fig. A-9-4) (For Jog Shuttle Models) Fig. A-9 29. Gear Sector (Fig. A-9-1) NOTE 1) Remove the Washer(W1) and lift up the Gear Sector. 30.

  • Page 61: Gear Assembly P3/Gear Assembly P2

    DECK MECHANISM DISASSEMBLY (Fig. A-10-1) Gear Assembly P3 Gear Assembly P3 Gear Assembly P2 (Fig. A-10-2) Gear Assembly P2 Chassis Optional Parts Base Assembly P2 Arm Assembly Idler Arm Assembly Idler Jog (Fig. A-10-4) (For Normal Models) For Jog Shuttle Models (Fig.

  • Page 62: Deck Mechanism Adjustment

    DECK MECHANISM ADJUSTMENT • Tools and Fixtures for Service 3. Torque gauge 1. Cassette Torque meter 2. Alignment tape 600g.Cm ATG SRK-VHT-303(Not SVC part) (See figure below) 4. Torque gauge adaptor 5. Post height adjusting driver 6. + Type driver (ø 5) Parts No: SV-TGO-030-000 (SMALL) SV-TGO-020-000 (LARGE)

  • Page 63: Mechanism Alignment Position Check

    DECK MECHANISM ADJUSTMENT 1.Mechanism Alignment Position Check Purpose:To determine if the Mechanism is in the correct position, when a Tape is ejected. Test Conditions (Mechanism Test Equipment/ Fixture Check Point Condition) Blank tape Mechanism and Mode Switch Position Eject Mode (with Cassette ejected) 1) Turn the Power S/W on and eject the Cassette by press- with the Gear Drive as below Fig.

  • Page 64: Preparation For Adjustment

    DECK MECHANISM ADJUSTMENT 2. Preparation for Adjustment (To set the Cassette without Tape. Cover the Holes of the End Sensors at the both sides of the Deck Mechanism to the Loading state Bracket Side(L) and Bracket Assembly Door to prevent a without inserting a Cassette Tape).

  • Page 65: Guide Roller Height Adjustment

    DECK MECHANISM ADJUSTMENT 4.Guide Roller Height Adjustment Purpose: To regulate the Height of the Tape so that the Bottom of the Tape runs along the Tape Guide Line on the Lower Drum. 4-1. Preliminary Adjustment Test Equipment/ Fixture Test Conditions (Mechanism Condition) Adjustment Point •...

  • Page 66: Audio/Control (A/C) Head Adjustment

    DECK MECHANISM ADJUSTMENT 5. Audio/Control (A/C) Head Adjustment Purpose: To insure that the Tape passes accurately over the Audio and Control Tracks in exact Alignment in both the Record and Playback Modes. 5-1. Preliminary Adjustment (Height and Tilt Adjustment) Perform the Preliminary Adjustment, when there is no Audio Output Signal with the Alignment Tape. Test Equipment/ Fixture Test Conditions (Mechanism Condition) Adjustment Point...

  • Page 67: Precise Adjustment (Azimuth Adjustment)

    DECK MECHANISM ADJUSTMENT 5-2. Confirm that the Tape passes smoothly slowly turn the Tilt Adjustment Screw(C) in the Counterclockwise direction. between the Take-up Guide and Pinch Roller(using a Mirror or the naked eye). Afetr completing Step 5-1.(Preliminary Adjustment), NOTE: check that the Tape passes around the Take-up Guide and Pinch Roller without Folding or Curling at the Top or Check the RF Envelope after adjusting the A/C Head, if Bottom.

  • Page 68: Adjustment After Replacing Drum Assembly (Video Heads)

    DECK MECHANISM ADJUSTMENT 7. Adjustment after Replacing Drum Assembly (Video Heads) Purpose: To correct for shift in the Roller Guide and X value after replacing the Drum. Test Conditions Test Equipment/ Fixture Connection Point Adjustment Points (Mechanism Condition) • CH-1: PB RF Envelope •...

  • Page 69: Maintenance/Inspection Procedure

    MAINTENANCE/INSPECTION PROCEDURE 1 Check before starting repairs The following faults can be remedied by cleaning and oiling. Check the needed lubrication and the conditions of cleanli- ness in the unit. Check with the customer to find out how often the unit is used, and then determine that the unit is ready for inspection and maintenance.

  • Page 70: Required Maintenance

    MAINTENANCE/INSPECTION PROCEDURE 4. Supplies Required for Inspection and 2. Required Maintenance Maintence The recording density of a VCR(VCP) is much higher than that of an audio tape recorder. VCR(VCP) components must (1) Grease : Kanto G-311G (Blue) or equivalent be very precise, at tolerances of 1/1000mm, to ensure com- (2) Isopropyl Alcohol or equivalent patiblity with other VCRs.

  • Page 71: Greasing

    MAINTENANCE/INSPECTION PROCEDURE (2) Periodic greasing 5-2) Greasing Grease specified locations every 5,000 hours. (1) Greasing guidelines Apply grease, with a cleaning patch. Do not use excess 1) Loading Path Inside & Top side 5) Lever Tension Groove grease. It may come into contact with the tape transport 2) Shaft 6) Clutch Assembly D33 Shaft or drive system.

  • Page 72: Mechanism Troubleshooting Guide

    MECHANISM TROUBLESHOOTING GUIDE 1.Deck Mechanism Auto REW doesn't work. Is the output of END sensor of supply side "H"? “H”: more than 3.5V “L”: less than 0.7V~1V Is the Vcc. voltage of End Check the syscon power. sensor 5V? Replace End sensor. Is the voltage across IR LED Replace LED.
  • Page 73 MECHANISM TROUBLESHOOTING GUIDE AUTO STOP. (PLAY/CUE/REV) Check aligment positions (page 79) Check spring Pinch. In Play/Cue/Rev is the pinch roller in contact with the capstan Is the output of DFG, DPG OK? Replace Drum Motor. shaft. Are there T/up and supply reel Check Servo, Syscon.
  • Page 74 MECHANISM TROUBLESHOOTING GUIDE In PB mode Tape Presence not sensed. Is the Pinch Roller attached Check Alignment positions to the Capstan Motor Shaft? (page 79) Does the T/Up Is the Belt ok? Replace the Belt. Reel turn? Check the clutch and the Idler Does the Capstan Motor turn? Assembly.

  • Page 75: Front Loading Mechanism

    MECHANISM TROUBLESHOOTING GUIDE 2. Front Loading Mechanism Cassette cannot be inserted. Is the Lever Switch Spring Replace or add the Does the Lever Switch work? damaged or omitted? Lever Switch Spring. Does the F/L switch work Replace F/L Switch. normally? Is the Vcc of Main P.C.Board Check syscon circuit.

  • Page 76: Front Loading Mechanism

    MECHANISM TROUBLESHOOTING GUIDE Cassette will not load. Does the CST insert? Does the opener Lid work? Replace the Opener Lid. Does the Gear Rack F/L work? Replace the Rear Rack F/L. Does the Opener Door work? Does the Arm Assembly F/L work? Is the opener Door assembled correctly? Does the L/D Motor work? Replace the Arm Assembly F/L.
  • Page 77 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110-8710, JAPAN TEL:03 (3827) 3111 H251701 Printed in Singapore...

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