Aiwa HV-FX970 Service Manual
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Aiwa HV-FX970 Service Manual

Video cassette recorder
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SERVICE MANUAL
VIDEO CASSETTE RECORDER
This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
(S/M Code No. 09-996-332-6T1).
HV-FX970
HV-GX910
BASIC TAPE MECHANISM : D-33
S/M Code No. 09-996-332-6R1
LE
LE

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Summary of Contents for Aiwa HV-FX970

  • Page 1 HV-FX970 HV-GX910 SERVICE MANUAL BASIC TAPE MECHANISM : D-33 VIDEO CASSETTE RECORDER This Service Manual is the "Revision Publishing" and replaces "Simple Manual" (S/M Code No. 09-996-332-6T1). S/M Code No. 09-996-332-6R1...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SPECIFICATIONS ............3 17. Opener Lid ..............56 ACCESSORIES LIST ............3 18. Arm Assembly T/up ........... 56 DISASSEMBLY INSTRUCTIONS ........4 19. Arm Assembly Pinch ..........56 SERVICE POSITION ............5 20. Belt Capstan/Motor Capstan ........57 VCR TEST TAPE INTERCHANGEABILITY TABLE ..

  • Page 3: Specifications

    SPECIFICATIONS Rewind time: Approx. 3 min. with E-180 tspe Video recording system Rotary 2 head helical scanning system Channel coverage VHF-low: C02 to C04, C13 to C20 Video head (SECAM), S01 to S07 [HV-FX970LE] Double azimuth 4 heads VHF-high: C05 to C12, S08 to S41 [HV-GX910LE] Double azimuth 2 heads UHF: C21 to C71...

  • 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 SPACER 60mm MAIN C.B Use a spacer with a diameter of 10-15 mm, and of any shape (round, square, etc.).

  • 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 C301 87-010-544-010 CAP,E 0.1-50V<970> C302 87-010-544-010 CAP,E 0.1-50V<970> SI-SK6-153-00A IC,STR-G6153T 5P C303 87-015-695-080 CAP,E 1.0M-50V S6-570-62B-000 SENSOR PC123Y C304 87-016-088-040 CAP,E 220-6.3V SI-KE4-310-00A IC,KIA431 3P C305 87-010-544-010 CAP,E 0.1-50V...
  • Page 8 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION C701 87-015-698-080 CAP,E 4.7-50V LD501 S9-31R-001-7A0 C702 87-015-681-080 CAP,E 10-16V MS501 S6-00R-PY0-01B SW,MMS00420ZMBO MIC C703 87-015-681-080 CAP,E 10-16V P3D01 S5-612-34Y-000 CONN,6P<970> C704 87-010-078-080 CAP,E 47M-6.3V P3D01 S5-612-34Z-000 CONN,3P<910> C706 87-016-577-080 CAP,470UF-16V...

  • Page 9: Wire Harness Diagram

    WIRE HARNESS DIAGRAM PMD01 PMD01 D.CTL M.GND LOWER DRUM 5.3V PMC01 PCM01 PKM02 PMK02 MOTOR GND I-LIMIT CAPSTAN CAP CTL MOTOR B FRONT1 C.B CAP REV "L" 5.3V KEY RTN0 P3D02 P3D02 CTL(+) CTL(-) A/E(-) A MAIN C.B A/E(+) HEAD A.REC A.PB MS501...

  • Page 10: Block Diagram

    BLOCK DIAGRAM-1 (POWER SECTION)

  • Page 11: Block Diagram

    BLOCK DIAGRAM-2 (AUDIO SECTION) BLOCK DIAGRAM-3 (VIDEO SECTION) •PB Mode •PB Mode : PB CHROMA SIGNAL Q304 : PB Y SIGNAL FROM IC301 CYL.HEADS LA71591M [FOR FX970LE] AUDIO MAIN C. COMB CONV LP 'A' PB DELAY C LPF LP 'B' PB LINE MUTE NORMAL, AUDIO OUT...

  • Page 12: Power Section

    BLOCK DIAGRAM-4 (TUNER SECTION) FROM POWER SECTION FROM/TO SCART SECTION FROM POWER SECTION FROM SYSCON/SERVO SECTION VIDEO FROM POWER SECTION BUFFER Q701 FROM POWER SECTION FROM SYSCON/SERVO SECTION Q7S1 SECAM AGC CONTROL SCART SECTION :PB VIDEO SIGNAL :REC AUDIO SIGNAL :REC VIDEO SIGNAL...
  • Page 13 BLOCK DIAGRAM-5 (SCART SECTION) JK901 [SCART1] :PB VIDEO SIGNAL AUDIO-R OUT SCART H :REC VIDEO SIGNAL AUDIO-R IN AUDIO-L OUT : VIDEO SIGNAL :PB AUDIO SIGNAL VIDEO OUT JK901 :REC AUDIO SIGNAL AUDIO-L IN VIDEO IN SCART1 12VA POWER SECTION D902 D901 JK901...
  • Page 14 BLOCK DIAGRAM-6 (SYSTEM CONTROL SECTION) FROM/TO DECK FROM/TO AUDIO(HIFI) IC502 KA3082 L/D MOTOR FROM/TO Y/C,PRE-AMP 31 32 61 78 25 26 38 39 40 80 81 62 90 91 90 C528 C529 R526 IIC DATA LD(-) TO POWER V.ENV LD(+) MS501 V.

  • Page 15: Schematic Diagram 1. Power Section

    SCHEMATIC DIAGRAM-1(POWER SECTION) A MAIN(POWER SECTION)C.B D152 D154 D155 Q153 1N4003A 1N4003A 1N4003A KTC2804-Y 5.3VA C159 10/16 Q151 R152 Q152 C156 KTC3203-Y KTC3203-Y 1.2K 10/16 C152 33VT 4.7/50 C157 C153 R151 10/16 ZD153 4.7/50 1.2K MTZ13A R171 ZD152 Q165 3.9K ZD151 C151 MTZ10C...
  • Page 16 SCHEMATIC DIAGRAM-2 (AUDIO/VIDEO SECTION) A MAIN(AUDIO/VIDEO SECTION)C.B AUDIO 1 R425 POWER SECTION R430 REC "H" 3.9K R222 L309 100u [FOR GX910LE] L201 R201 C334 C374 C371 REC "H" C331 220/6.3 220/6.3 L306 H.AMP SW C220 C218 100U C210 C209 C402 C401 0.022 47/16...
  • Page 17 WAVEFORM-1 (VIDEO SECTION) IC301 Pin IC301 Pin IC301 Pin IC301 Pin 38 , 32 , 31 Video in PB/REC mode PBmode REC mode 1Vp-p 500mvp-p 4.2Vp-p 1.4Vp-p IC301 Pin IC301 Pin IC301 Pin IC301 Pin REC mode PB mode PB mode PB mode 2.2Vp-p 2.1 Vp-p...

  • Page 18: Transistor Illustration

    WAVEFORM-2 (SERVO/OSD SECTION) IC501 Pin IC501Pin IC501 Pin IC501 Pin 1V/10mS 1V/10mS 1V/5mS 1V/2mS REC mode REC mode REC/PB mdes QUE/REV modes (CTL+) (CTL–) (V.H/SW) (D.V-SYNC) IC501 Pin IC501 Pin IC501 Pin IC501 Pin 1V/1mS 1V/10µS 1V/1mS 100mV/10µS REC/PB mode REC/PB modes REC/PB modes EE/PB modes...
  • Page 19 SCHEMATIC DIAGRAM-3 (SYSTEM CONTROL/SERVO SECTION) A MAIN(SYSCON/SERVO SECTION)C.B 12V(DRUM) IC502 KA3082 5.3VA IC505 PMK01 MOTOR DRIVE 100 99 98 85 84 DIG5F1 KIA7042P OTPB "H" C516 0.022 K.RTN 1 MOTOR DRIVE REC TIMER VCR M REM BIL SAP Hi-Fi ST To C 8 7 6 5 SP LP EP...
  • Page 20 SCHEMATIC DIAGRAM-4 (SCART SECTION) A MAIN(SCART SECTION)C.B JK901 [SCART1] AUDIO-R OUT SCART H AUDIO-R IN AUDIO-L OUT VIDEO OUT AUDIO-L IN VIDEO IN JK901 SCART1 L905 12VA BEAD CORE POWER R901 C958 R902 L903 SECTION ONE VOLTAGE:PB OR REC MODE TWO VOLTAGES:PB AND (REC) MODE C901 1000P...
  • Page 21 SCHEMATIC DIAGRAM-6 (FRONT-1 C.B) WAVEFORM-3 SCHEMATIC DIAGRAM-5 (TUNER/IF SECTION) B FRONT-1 C.B PKM02 TU701 Pin A MAIN(TUNER/IF SECTION)C.B (IF Signal) L702 5.3VA R5A3 R5A1 R5A2 R5A4 R5A5 C705 C704 2.2K 1.8K 1.5K 2.7K 3.9K 47/6.3 0.01 K.RTN 0 POWER SECTION SW5A1 SW5A2 SW5A3...

  • Page 22: Main C.b Section

    WIRING-1 (MAIN C.B SECTION) CAPSTAN LOADING CTL/AUDIO LOWER DRUM MOTOR MOTOR HEADS PMD01 CYL.HEADS A MAIN C.B PCM01 ANTENNE AV1 ENTREE/SORTIE (TV) JK901 AV2 ENTREE(DECODEUR) ENTREE SORTIE PML01 P3D02 PMD01 P3D01 PMC01 C546 L907 JK901 PMD01 R212 R490 R491 C355 17 19 C466 C208...
  • Page 23 WIRING-2 (FRONT-1 C.B) B FRONT-1 C.B SW5A1 SW5A1 SW5A6 REC/OTR PAUSE/STILL SW5A6 SW5A2 SW5A4 SW5A4 SW5A2 /F FWD /REW SW5A3 SW5A3 SW5A5 PLAY STOP/EJECT SW5A5 1 PKM02 To A MAIN C.B PMK02 WIRING-3 (FRONT-2 C.B) C FRONT-2 C.B To A MAIN C.B PMK01 PKM01...

  • Page 24: Ic Description

    IC DESCRIPTION IC, HD3977RC17F Pin No. Pin Name Description End sensor to detect the tape’s terminal (Lead taps section). TAKE UP If “H” is detected signal in the REW, REV modes, the mechanism stops and ejects the SENSOR cassette automatically. VSS (A/D) Ground.
  • Page 25 Pin No. Pin Name Description KEY NAME A/D RANGE SP/EP 0.0V ~ 0.45V CH UP 0.46V ~ 0.96V CH DOWN 0.97V ~ 1.47V STOP/EJECT 1.48V ~ 1.97V REC/ITR 1.99V ~ 2.48V KEY RTN1 KEY NAME A/D RANGE PAUSE 0.0V ~ 0.45V KEY RTN 1 0.46V ~ 0.96V 0.97V ~ 1.47V...
  • Page 26 Pin No. Pin Name Description Vcc (SYS) – SYSCON Vcc. A.H.S/W 30 Not connect Pulses output for switching video head A and B. - Produces PG M.M pulses internally by using inputted DPG, DFG pulses to pin 38, V.H.S/W - Produces video head switching 30 Hz pulses by sychronizing at edge point of first PG.
  • Page 27 Pin No. Pin Name Description Vref (OSD) – GND. CV OUT The video signal is output to the RF modulator and line output jack. CHAR BIAS – GND. AFC LPF Horizontal sync is used to lock the OSD. (Reduce Jitter) AFC OSC Vss (OSD) –...
  • Page 28 Pin No. Pin Name Description 1. Port to ditect the mechanism’s position. 2. Deck and Mode SW Positions. MODE SW4 MODE MODE MODE MODE DECK POSITION NAME RETURN EJECT MODE SW3 LOADING START LOADING END TUNE MODE SW2 PLAY STOP FF, REW MODE SW1 PASS...
  • Page 29 Pin No. Pin Name Description 1. When a power failure is detected, this pin goes “L” and the following sequence of events occurs. 2. Power failure detector timing sequence. AC POWER ON AC POWER OFF Vcc for (Back-up) AVcc No (Back-up) 5.3VA Power failure signal POWER FAIL...

  • Page 30: Adjustment

    ADJUSTMENT Test Equipment • Oscilloscope • Test Tape • AC Millivolt Meter TTV-P1 Adjustment Location A MAIN C.B (TOP VIEW) H/SW TU701 P3D01 P3D02 IC502 T101 IC301 PMC01 IC501 VR501 PG ADJ. IC503 IC7VI IC5F1 PMK02...
  • Page 31 1. Servo Adjustment 1) PG Adjustment MODE MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION PLAY VIDEO OUT 6.5 ± 0.5H VR501 (TTV-P1) H/SW (W317, W318) • 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” is blink after the PAL SP Test Tape is inserted.

  • Page 32: Mechanical Exploded View 1/1

    MECHANICAL EXPLODED VIEW 1/1...

  • Page 33: Mechanical Parts List 1/1

    MECHANICAL MAIN PARTS LIST 1/1 REF. NO PART NO. KANRI DESCRIPTION 001 S7-21R-F09-4B0 PANEL ASSY FRONT<970LEK> 001 S7-21R-F09-4C0 PANEL ASSY FRONT<910LEK> ——— PANEL FRONT(HV-FX970L) 003 S4-426-81A-000 SPR,DOOR 004 S5-80R-003-3E0 DOOR CST<910LEK> 004 S5-80R-003-3C0 DOOR CST<970LEK> 005 S5-50R-021-0A0 COVER BOTTOM 006 S2-10R-002-3D0 FRAME MAIN ———...

  • Page 34: Mechanism Exploded View 1/3, 2/3, 3/3

    MECHANISM EXPLODED VIEW 1/3...

  • Page 35: Mechanism Parts List 1/3, 2/3, 3/3

    MECHANISM MAIN PARTS LIST 1/3 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION 024 S2-61R-000-9A0 ARM ASSY IDLER-J<970LEK> 001 S7-23R-010-5D0 DRUM ASSY SUB D33 025 S8-10R-005-3A0 BRACKET L/D MOTOR 002 S6-80R-B00-04A MOTOR(MECH) 026 S6-81R-000-7A0 MOTOR ASSY L/D 003 S9-30R-010-7A0 HOLDER FPC<970LEK>...
  • Page 36 MECHANISM EXPLODED VIEW 2/3...
  • Page 37 MECHANISM MAIN PARTS LIST 2/3 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION ——— LEVER P2 032 S1-41R-000-2A0 CHASSIS ASSY ——— BRACKET JOG<970LEK> 051 S4-00R-000-5A0 BELT CAPSTAN ——— LEVER JOG<970LEK> 052 S6-80R-A00-03A MOTOR(MECH) ——— LEVER SLOW<970LEK> 053 S9-74R-001-8A0 GUIDE RACK F/L 074 S9-70R-004-9A0...
  • Page 38 MECHANISM EXPLODED VIEW 3/3...
  • Page 39 MECHANISM MAIN PARTS LIST 3/3 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION 032 S1-41R-000-2A0 CHASSIS ASSY ——— ARM F/L(R) 100 S3-01R-002-9A0 PLATE ASSY TOP 115 S9-70R-005-0A0 SPRING SWITCH 101 S8-10R-005-6A0 BRACKET SIDE(L) 116 S5-10R-002-0A0 LEVER SWITCH ———...

  • Page 40: 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 41: Deck Mechanism Disassembly

    DECK MECHANISM DISASSEMBLY (S2) Stator (S2) (S3) Drum Motor (S3) Rotor Drum Sub Assembly (Fig. A-1-1) Drum FPC (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 42: Plate Assembly Top

    DECK MECHANISM DISASSEMBLY Plate Assembly Top (Fig. A-2-1) Holder Assembly CST Lever Stopper (L) Lever Stopper (R) (Fig. A-2-2) Arm Assembly F/L Arm F/L (Fig. A-2-6) (S2) Lever Assembly S/W (Fig. A-2-7) (H5) Bracket Side (L) (S1) (Fig. A-2-4) Groove Gear Rack F/L Groove (Fig.
  • Page 43 DECK MECHANISM DISASSEMBLY 2. Plate Assembly Top (Fig. A-2-1) 2) Remove the Screw (S2) and disassemble the Bracket Assembly Door in the front. 1) Unhook the (H1) and separate the Left Side. 6. Arm Assembly F/L (Fig. A-2-6) 2) Unhook the (H2) and lift up the Plate Assembly Top. 1) Push the Arm Assembly F/L to the left and lift up it.

  • Page 44: Arm Assembly Cleaner

    DECK MECHANISM DISASSEMBLY Arm Assembly Cleaner (Fig. A-3-1) (S1) Base Assembly A/C Head (Fig. A-3-3) (Fig. A-3-2) (H1) Head F/E Fig. A-3 8. Arm Assembly Cleaner(Fig. A-3-1) 9. Head F/E (Fig. A-3-2) 1) Break away the (A) part shown above Fig. A-3-1 from the 1) Unhook the two Hooks (H1) on the back side of the Embossing of the Chassis in the clockwise direction and Chassis and lift up the Head F/E.

  • Page 45: 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 (Fig. A-4-3) Assembly Spring T Brake Tension Reel S Brake Assembly T (Fig. A-4-2) (Fig. A-4-4) Fig. A-4 11. Brake Assembly S (Fig. A-4-1) 13.

  • Page 46: Support Cst

    DECK MECHANISM DISASSEMBLY Opener Lid (Fig. A-5-3) Spring Arm T/Up 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) 2) Lift up the Arm Assembly T/up. 1) Break away the (A) part shown above Fig.

  • Page 47: Belt Capstan/Motor Capstan

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

  • Page 48: Bracket Assembly Jog

    DECK MECHANISM DISASSEMBLY Brake Assembly Capstan Hole (A)+(B) Brake Assembly Capstan (H2) Gear Cam Spring Capstan (Fig. A-7-4) Hole (A) Guide Rack F/L (H1) (S1) Bracket Assembly Jog (S2) (Fig. A-7-2) (Fig. A-7-1) Gear Rack F/L Gear Cam Hole (B) (Fig.

  • Page 49: 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) 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. A-8-4) Gear Cam Fig. A-8 (Fig. B-3) 27. Gear Drive (Fig. A-8-1)/ Gear Cam (Fig.

  • Page 50: Gear Sector

    DECK MECHANISM DISASSEMBLY Washer (W1) Gear Sector (Fig. A-9-1) ( S1) Base Tension Plate Slider (Fig. A-9-2) (Fig. A-9-3) Lever Tension (Fig. A-9-4) Fig. A-9 29. Gear Sector (Fig. A-9-1) NOTE 1) Remove the Washer(W1) and lift up the Gear Sector. 30.

  • Page 51: Arm Assembly Idler Jog Or Arm Assembly Idler

    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 or Arm Assembly Idler Jog (Fig. A-10-4) (For 2HD Models) (For 4HD Models) (Fig.

  • Page 52: Deck Mechanism Adjustment Tools And Fixtures For Service

    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 53: 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) • Mechanism and Mode Switch Position • Blank tape •...

  • Page 54: Preparation For Adjustment

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

  • Page 55: 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 56: 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 57: Confirm That The Tape Passes Smoothly Between The Take-Up Guide And Pinch Roller

    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 58: 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 59: 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 60: 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 61: 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 62: 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 63 MECHANISM TROUBLESHOOTING GUIDE AUTO STOP. (PLAY/CUE/REV) Check aligment positions (page 4- 14) 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 64 MECHANISM TROUBLESHOOTING GUIDE In PB mode Tape Presence not sensed. Is the Pinch Roller attached Check Alignment positions to the Capstan Motor Shaft? (page 4-14) 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 65: 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 5V? Check syscon circuit.
  • Page 66 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 67 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110-8710, JAPAN TEL:03 (3827) 3111 Printed in Singapore 920074...

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