Aiwa HV-GX915 User Manual

SERVICE MANUAL
BASIC VIDEO MECHANISM
:D33K-4HF/PAL-HREW(6721R-0251A)<8200>
:D33K-4HF/PAL(6721R-0250A)<7700/5700>
:D33K-4HD/NP-VCR(6721R-0230F)<990>
:D33K-2HD/PAL-VCR(6721R-0212A)<915>
STEREO VIDEO CASSETTE RECORDER
<8200/7700/5700>
VIDEO CASSETTE RECORDER<990/915>
HV-FX8200
HV-FX7700
HV-FX5700
HV-FX990
HV-GX915
S/M Code No. 09-007-347-2R6
EH
EH
EH
Z
Z
HV-FX7700, FX5700
HV-FX8200
HV-FX990, GX915

Aiwa HV-GX915 Specifications

General

Brand	Aiwa
Model	HV-GX915
Category	VCR
Language	English

Summary

Specifications

Accessories List

Disassembly Instructions

Top Case Removal

Steps to remove the top cover of the VCR unit.

Panel Front Removal

Instructions for removing the front panel assembly.

Mechanism Removal

Steps to remove the main mechanism unit from the chassis.

Main C.B. Removal

Guide for removing the Main Circuit Board.

Service Position

VCR Test Tape Interchangeability Table

Electrical Main Parts List

Wire Harness Diagram

Block Diagram-1 (Power Section)

Block Diagram-2 (Audio/Video Signal Section) <HV-FX990/GX915>

Block Diagram-3 (Audio/Video Signal Section) <HV-FXFX8200/FX7700/FX5700>

Block Diagram-4 (Video Section)

Block Diagram-5 (Normal Audio Section)

Block Diagram-6 (Tuner, Nicam/A2 Section)

Schematic Diagram-1 (Power/Tuner/Nicam Section) <HV-FX8200/FX7700/FX5700>

Schematic Diagram-2 (Power/Tuner Section) <HV-FX990/GX915>

Schematic Diagram-4 (Hi-Fi Audio/Scart Section) <HV-FX8200/FX7700/FX5700>

Key Section Schematics

Schematic Diagram-8 (Key1 Section) <HV-FX8200/FX7700/FX5700>

Circuit diagram for Key1 section of HV-FX8200/7700/5700.

Schematic Diagram-10 (Key2 Section) <HV-FX8200/FX7700/FX5700>

Circuit diagram for Key2 section of HV-FX8200/7700/5700.

Schematic Diagram-9 (Key1 Section) <HV-FX990/GX915>

Circuit diagram for Key1 section of HV-FX990/GX915.

Schematic Diagram-11 (Key2 Section) <HV-FX990/GX915>

Circuit diagram for Key2 section of HV-FX990/GX915.

Adjustment

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 Disassembly

1. Drum Assembly

Step-by-step guide for removing the drum assembly.

2. Plate Assembly Top

Instructions for removing the plate assembly top.

3. Holder Assembly CST

Procedure for removing the Holder Assembly CST.

4. Guide CST

5. Bracket Side(L) / Bracket Assembly Door

6. Arm Assembly F/L

7. Lever Assembly S/W

8. Arm Assembly Cleaner

9. Head F/E

Instructions for removing the Head F/E.

10. Base Assembly A/C Head

11. Brake Assembly S

12. Brake Assembly T

13. Arm Assembly Tension

14. Reel S & Reel T

15. Support CST

16. Base Assembly P4

17. Opener Lid

18. Arm Assembly T/up

19. Arm Assembly Pinch

20. Belt Capstan / Motor Capstan

21. Clutch Assembly D33-K

22. Lever F/R

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

24. Bracket Assembly Jog

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

26. Brake Assembly Capstan

27. Gear Drive / Gear Cam / Gear Connector

28. Bracket Assembly L/D Motor

29. Gear Sector

30. Base Tension / Plate Slider / Lever Tension

31. Gear Assembly P3 / Gear Assembly P2

32. Base Assembly P3 / Base Assembly P2

33. Arm Assembly Idler or Arm Assembly Idler Jog

Deck Mechanism Adjustment

1.Mechanism Alignment Position Check

Procedure to check and set the correct mechanism alignment.

2. Preparation for Adjustment

3. Checking Torque

Method to check tape transport torque for smooth operation.

4. Guide Roller Height Adjustment

Procedure to regulate tape height along the lower drum guide.

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

Steps for aligning the A/C head for accurate track reading.

5-2. Confirm that the Tape passes smoothly

5-3. Precise Adjustment (Azimuth adjustment)

Fine-tuning the azimuth for optimal head performance.

6. X-Value Adjustment

Procedure for X-Value adjustment for VCR compatibility.

7. Adjustment after Replacing Drum Assembly (Video Heads)

Adjustments needed after drum replacement for roller guide and X-value.

8. Check the Tape Travel after Reassembling Deck Assembly.

Maintenance/Inspection Procedure

1 Check before starting repairs

5-2) Greasing

Mechanism Troubleshooting Guide

1.Deck Mechanism Troubleshooting

Troubleshooting flowcharts for common deck mechanism faults.

2. Front Loading Mechanism Troubleshooting

Troubleshooting for front loading mechanism issues.