Aiwa HV-FX970 User Manual

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

Aiwa HV-FX970 Specifications

General

Brand	Aiwa
Model	HV-FX970
Category	VCR
Language	English

Summary

Specifications

Accessories List

Disassembly Instructions

Panel Front Removal

Instructions on how to remove the front panel.

Mechanism Removal

Steps to disconnect and remove the VCR mechanism.

Service Position

Location

Instructions on where to install spacers for the service position.

VCR Test Tape Interchangeability Table

Electrical Main Parts List

Wire Harness Diagram

Block Diagram-1 (Power Section)

Block Diagram-2 (Audio Section)

Block Diagram-3 (Video Section)

Block Diagram-4 (Tuner Section)

Block Diagram-5 (SCART Section)

Block Diagram-6 (System Control Section)

Schematic Diagram-1(Power Section)

Schematic Diagram-2(Audio/Video Section)

Waveform-1 (Video Section)

Waveform-2 (Servo/OSD Section)

Transistor Illustration

Schematic Diagram-4 (SCART Section)

Schematic Diagram-5 (Tuner/IF Section)

Waveform-3

Schematic Diagram-6 (Front-1 C.B)

Schematic Diagram-7 (Front-2 C.B)

Wiring-1 (Main C.B Section)

Wiring-2 (Front-1 C.B)

Wiring-3 (Front-2 C.B)

IC Description

IC, HD3977RC17F

Detailed description of the HD3977RC17F IC and its pin functions.

IC Description

Pin Function Descriptions

Detailed explanations of various pins on the HD3977RC17F IC.

IC Description

Pin Function Descriptions (Cont.)

Detailed explanations of various pins on the HD3977RC17F IC.

IC Description

Pin Function Descriptions (Cont.)

Detailed explanations of various pins on the HD3977RC17F IC.

IC Description

Pin Function Descriptions (Cont.)

Detailed explanations of various pins on the HD3977RC17F IC.

IC Description

Pin Function Descriptions (Cont.)

Detailed explanations of various pins on the HD3977RC17F IC.

Adjustment

Test Equipment

List of tools and equipment required for VCR adjustments.

Adjustment Location

Diagram showing the location of adjustment points on the Main C.B.

Servo Adjustment

1) PG Adjustment

Procedure for adjusting the Pulse Generator (PG) signal for accurate rotation.

Mechanical Exploded View 1/1

Mechanical Main Parts List 1/1

Mechanism Exploded View 1/3

Mechanism Main Parts List 1/3

Mechanism Exploded View 2/3

Mechanism Main Parts List 2/3

Mechanism Exploded View 3/3

Mechanism Main Parts List 3/3

Deck Mechanism Parts Locations

Top View

Top view of the deck mechanism indicating parts location.

Bottom View

Bottom view of the deck mechanism indicating parts location.

Deck Mechanism Disassembly

1. Drum Assembly

Procedure for removing and disassembling the drum assembly.

Deck Mechanism Disassembly

2. Plate Assembly Top

Procedure for removing the plate assembly top.

3. Holder Assembly CST

Procedure for removing the holder assembly CST.

4. Guide CST

Procedure for removing the guide CST.

5. Bracket Side(L)/Bracket Assembly Door

Procedure for removing bracket side and door.

6. Arm Assembly F/L

Procedure for removing the arm assembly F/L.

7. Lever Assembly S/W

Procedure for removing the lever assembly S/W.

Deck Mechanism Disassembly

8. Arm Assembly Cleaner

Procedure for removing the arm assembly cleaner.

9. Head F/E

Procedure for removing the head F/E.

10. Base Assembly A/C Head

Procedure for removing the base assembly A/C head.

Deck Mechanism Disassembly

11. Brake Assembly S

Procedure for removing the brake assembly S.

12. Brake Assembly T

Procedure for removing the brake assembly T.

13. Arm Assembly Tension

Procedure for removing the arm assembly tension.

14. Reel S & Reel T

Procedure for removing reel S and reel T.

Deck Mechanism Disassembly

15. Support CST

Procedure for removing the support CST.

16. Base Assembly P4

Procedure for removing the base assembly P4.

17. Opener Lid

Procedure for removing the opener lid.

18. Arm Assembly T/Up

Procedure for removing the arm assembly T/up.

19. Arm Assembly Pinch

Procedure for removing the arm assembly pinch.

Deck Mechanism Disassembly

20. Belt Capstan/Motor Capstan

Procedure for removing belt capstan and motor capstan.

21. Clutch Assembly D33

Procedure for removing the clutch assembly D33.

22. Lever F/R

Procedure for removing the lever F/R.

23. Gear Assembly H-Up/D or Gear Assembly Up/D

Procedure for removing gear assemblies.

Deck Mechanism Disassembly

24. Bracket Assembly Jog

Procedure for removing the bracket assembly jog.

25. Guide Rack F/L/Gear Rack F/L

Procedure for removing guide and gear racks.

26. Brake Assembly Capstan

Procedure for removing the brake assembly capstan.

Deck Mechanism Disassembly

27. Gear Drive/Gear Cam/Gear Connector

Procedure for removing gear drive, cam, and connector.

28. Bracket Assembly L/D Motor

Procedure for removing the bracket assembly L/D motor.

Deck Mechanism Disassembly

29. Gear Sector

Procedure for removing the gear sector.

30. Base Tension/Plate Slider/Lever Tension

Procedure for removing base tension, plate slider, and lever tension.

Deck Mechanism Disassembly

31. Gear Assembly P3/Gear Assembly P2

Procedure for removing gear assemblies P3 and P2.

32. Base Assembly P3/Base Assembly P2

Procedure for removing base assemblies P3 and P2.

33. Arm Assembly Idler Jog or Arm Assembly Idler

Procedure for removing arm assembly idler jog or idler.

Deck Mechanism Adjustment

Tools and Fixtures for Service

List of necessary tools and fixtures for deck mechanism adjustments.

Deck Mechanism Adjustment

1. Mechanism Alignment Position Check

Procedure to check if the mechanism is correctly aligned after ejection.

Deck Mechanism Adjustment

2. Preparation for Adjustment

Steps to set the deck mechanism to the loading state for adjustments.

3. Checking Torque

Procedure to check tape transport torque in different modes.

Guide Roller Height Adjustment

4-1. Preliminary Adjustment

Initial adjustment of the guide roller height.

5. Audio/Control (A/C) Head Adjustment

5-1. Preliminary Adjustment (Height and Tilt Adjustment)

Preliminary adjustment of A/C head height and tilt.

Deck Mechanism Adjustment

5-2. Confirm That the Tape Passes Smoothly

Verify smooth tape passage over guides and pinch roller.

5-3. Precise Adjustment (Azimuth Adjustment)

Precise adjustment of the azimuth for optimal signal reproduction.

6. X-Value Adjustment

Procedure to adjust X-value for compatibility with other VCR models.

7. Adjustment After Replacing Drum Assembly (Video Heads)

8. Check the Tape Travel After Reassembling Deck Assembly

Maintenance/Inspection Procedure

1 Check Before Starting Repairs

Initial checks and cleaning recommendations before starting repairs.

Maintenance/Inspection Procedure

2. Required Maintenance

Details on the precision required for VCR components.

3. Scheduled Maintenance

Recommendations for periodic maintenance schedules based on usage.

4. Supplies Required for Inspection and Maintenance

List of required lubricants, cleaning agents, and tools.

5. Maintenance Procedure

Step-by-step guide for cleaning and greasing the VCR.

5-1) Cleaning

Detailed steps for cleaning video heads and tape transport system.

Maintenance/Inspection Procedure

5-2) Greasing

Guidelines and locations for applying grease to the mechanism.

Mechanism Troubleshooting Guide

1.Deck Mechanism

Troubleshooting steps for the deck mechanism's functions.

Mechanism Troubleshooting Guide

C. Auto Stop (Play/Cue/Rev)

Troubleshooting steps for auto stop issues during playback modes.

D. No Cassette Loading

Troubleshooting steps for issues preventing cassette loading.

Mechanism Troubleshooting Guide

E. In PB Mode Tape Presence Not Sensed

Troubleshooting steps when tape presence is not detected in PB mode.

Mechanism Troubleshooting Guide

2. Front Loading Mechanism

Troubleshooting for issues related to the front loading mechanism.

Mechanism Troubleshooting Guide

C. Cassette Will Not Load

Troubleshooting steps when a cassette fails to load.