Aiwa HV-FX4300 User Manual (English)

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Aiwa HV-FX4300 Specifications

General

Brand	Aiwa
Model	HV-FX4300
Category	VCR
Language	English

Summary

SPECIFICATIONS

ACCESSORIES LIST

DISASSEMBLY INSTRUCTIONS

1. Top Case Removal

Instructions for removing the top case of the VCR.

2. Panel Front Removal

Instructions for removing the front panel of the VCR.

3. Key1 C.B. and Key2 C.B. Removal

Instructions for removing Key1 and Key2 circuit boards.

SERVICE POSITION

VCR TEST TAPE INTERCHANGEABILITY TABLE

ELECTRICAL MAIN PARTS LIST -1/3

WIRE HARENESS DIAGRAM

BLOCK DIAGRAM -1/8 (POWER SECTION)

SCHEMATIC DIAGRAM - 1/10 (POWER/TUNER/NICAM SECTION) <HV-FX7800>

VOLTAGE CHART - 1/4 (POWER/NICAM SECTION)

WAVEFORMS-1/2 (AUDIO/VIDEO SECTION)

FL DISPLAY -1/1 <HV-FX7800>

WIRING -1/6 (MAIN C.B) <HV-FX7800>

ADJUSTMENT

1. Servo Adjustment

Procedure for adjusting the servo system of the VCR.

1) PG Adjustment

Adjusting the PG signal for servo control.

IC BLOCK DIAGRAM -1/1

IC DESCRIPTION -1/4 (HD6432197A37FX) <HV-FX7800> -1/3

ELECTRICAL TROUBLESHOOTING -1/17

1. Power Circuit(SMPS)

Troubleshooting steps for the Power Supply Circuit.

(1) No 5.3VA.

Steps to diagnose and fix when 5.3VA is missing.

2. Servo Circuit

Troubleshooting steps for servo circuit problems.

Unstable Video in PB Mode

Steps to resolve unstable video during playback.

Capstan Motor Stopped.

Troubleshooting steps when the capstan motor fails to operate.

Drum Motor stopped.

Troubleshooting steps for a stopped drum motor.

Cassette tape loading is unstable.

Troubleshooting steps for unstable cassette tape loading.

Non working function buttons.

Troubleshooting steps for unresponsive function buttons.

3. Y/C CIRCUIT

Troubleshooting for Y/C signal issues.

(2) When the Y(Luminance) signal doesn't appear on the screen in PB Mode,

Diagnose and fix missing Y (Luminance) signal during playback.

4. Y/C CIRCUIT

Troubleshooting for Y/C signal issues.

(1) No Video in EE Mode,

Diagnose and fix no video in EE mode.

5. Tuner/IF circuit

Troubleshooting for Tuner and IF circuit problems.

(1) No picture on the TV screen

Troubleshoot no picture on the TV screen.

2. No sound (Mono Model Only)

Troubleshoot no sound in mono mode.

(3) No sound (Hi-Fi Model Only)

Troubleshoot no sound in Hi-Fi mode.

6. Hi-Fi Circuit (Hi-Fi Model Only)

Troubleshooting for Hi-Fi circuit issues.

A. Hi-Fi Playback.

Troubleshoot Hi-Fi playback issues.

MECHANICAL EXPLODED VIEW -1/1

MECHANICAL MAIN PARTS LIST 1/1

MECHANISM EXPLODED VIEW -1/3

DECK MECHANISM PARTS LOCATIONS

• Top View

Part locations shown from the top view of the deck mechanism.

• Bottom View

Part locations shown from the bottom view of the deck mechanism.

DECK MECHANISM DISASSEMBLY

1. Drum Assembly (Fig. A-1-1)

Step-by-step instructions for disassembling the drum assembly.

2. Plate Assembly Top (Fig. A-2-1)

Instructions for disassembling the plate assembly top.

3. Holder Assembly CST (Fig.A-2-2)

Instructions for disassembling the holder assembly CST.

4. Guide CST (Fig.A-2-3)

Instructions for disassembling the guide CST.

5. Bracket Side(L) (Fig. A-2-4)/ Bracket Assembly Door (Fig.A-2-5)

Instructions for disassembling bracket side and door.

6. Arm Assembly F/L (Fig. A-2-6)

Instructions for disassembling the arm assembly F/L.

7. Lever Assembly S/W (Fig. A-2-7)

Instructions for disassembling the lever assembly S/W.

8. Arm Assembly Cleaner(Fig. A-3-1)

Instructions for disassembling the arm assembly cleaner.

9. Head F/E (Fig. A-3-2)

Instructions for disassembling the head F/E.

10. Base Assembly A/C Head (Fig. A-3-3)

Instructions for disassembling the base assembly A/C head.

11. Brake Assembly S (Fig. A-4-1)

Instructions for disassembling brake assembly S.

12. Brake Assembly T (Fig. A-4-2)

Instructions for disassembling brake assembly T.

13. Arm Assembly Tension (Fig. A-4-3)

Instructions for disassembling arm assembly tension.

14. Reel S (Fig. A-4-4) & Reel T (Fig. A-4-5)

Instructions for removing reel S and reel T.

15. Support CST (Fig. A-5-1)

Instructions for disassembling support CST.

16. Base Assembly P4 (Fig. A-5-2)

Instructions for disassembling base assembly P4.

17. Opener Lid (Fig. A-5-3)

Instructions for disassembling the opener lid.

18. Arm Assembly T/up (Fig. A-5-4)

Instructions for disassembling arm assembly T/up.

19. Arm Assembly Pinch (Fig. A-5-5)

Instructions for disassembling arm assembly pinch.

20. Belt Capstan (Fig. A-6-1)/ Motor Capstan (Fig. A-6-2)

Instructions for removing belt and motor capstan.

21. Clutch Assembly D33-Y (Fig. A-6-3)

Instructions for disassembling clutch assembly D33-Y.

22. Lever F/R (Fig. A-6-4)

Instructions for disassembling lever F/R.

23. Gear H-Up/D-K or Gear Up/D-K (Fig. A-6-5)

Instructions for removing gear H-Up/D-K or Gear Up/D-K.

24. Bracket Assembly Jog (Fig. A-7-1)

Instructions for disassembling bracket assembly jog.

25. Guide Rack F/L (Fig. A-7-2)/ Gear Rack F/L (Fig. A-7-3)

Instructions for disassembling guide rack and gear rack.

26. Brake Assembly Capstan (Fig. A-7-4)

Instructions for disassembling brake assembly capstan.

27. Gear Drive (Fig. A-8-1)/ Gear Cam (Fig. A-8-2)/ Gear Connector (Fig. A-8-3)

Instructions for disassembling gear drive, cam, and connector.

28. Bracket Assembly L/D Motor (Fig. A-8-4)

Instructions for disassembling bracket assembly L/D motor.

29. Gear Sector (Fig. A-9-1)

Instructions for removing gear sector.

30. Base Tension (Fig. A-9-2)/ Plate Slider (Fig. A-9-3)/ Lever Tension (Fig. A-9-4)

Instructions for disassembling base tension, plate slider, and lever tension.

31. Gear Assembly P3 (Fig. A-10-1)/ Gear Assembly P2 (Fig. A-10-2)

Instructions for disassembling gear assemblies P3 and P2.

32. Base Assembly P3 (Fig. A-10-3)/ Base Assembly P2 (Fig. A-10-4)

Instructions for disassembling base assemblies P3 and P2.

33. Arm Assembly Idler or Arm Assembly Idler Jog(Fig. A-10-5)

Instructions for disassembling arm assembly idler or idler jog.

ALIGNMENT TAPES FOR ADJUSTMENT

DECK MECHANISM ADJUSTMENT

1.Mechanism Alignment Position Check

Procedure to check mechanism alignment position before tape insertion.

2. Preparation for Adjustment (To set the Deck Mechanism to the Loading state without inserting a Cassette Tape).

Steps to prepare the deck mechanism for adjustment without a cassette.

3. Checking Torque

Procedure to check tape transport torque in various modes.

4. Guide Roller Height Adjustment

Procedure to adjust guide roller height for proper tape path.

4-1. Preliminary Adjustment

Initial adjustment of guide roller height.

4-2. Precise Adjustment

Fine adjustment of guide roller height for optimal performance.

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

Adjusting the audio and control head for accurate tape alignment.

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

Preliminary height and tilt adjustment of the A/C head.

5-3. Precise Adjustment (Azimuth adjustment)

Precise adjustment of the azimuth for accurate head alignment.

6. X-Value Adjustment

Adjusting the X-value for compatibility with other VCR models.

7. Adjustment after Replacing Drum Assembly (Video Heads)

Steps to perform after replacing the drum assembly and video heads.

8. Check the Tape Travel after Reassembling Deck Assembly.

Checking tape travel after reassembling the deck mechanism.

MAINTENANCE/INSPECTION PROCEDURE

1 Check before starting repairs

Initial checks and cleaning before starting repairs.

5) Maintenance Procedure

General maintenance procedures.

5-1) Cleaning

Detailed steps for cleaning video heads and tape transport system.

5-2) Greasing

Guidelines and points for greasing mechanism parts.

(1) Greasing guidelines

General guidelines for applying grease to the mechanism.

MECHANISM TROUBLESHOOTING GUIDE

1.Deck Mechanism

Troubleshooting guide for the deck mechanism.

Auto REW doesn't work.

Steps to diagnose and fix auto rewind not working.

No F/R modes.

Troubleshooting steps for no forward/reverse modes.

C. AUTO STOP. (PLAY/CUE/REV)

Troubleshooting steps for auto stop function during play/cue/rev.

D. No cassette loading.

Troubleshooting steps when the cassette fails to load.

E. In PB mode Tape Presence not sensed.

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

2. Front Loading Mechanism

Troubleshooting guide for the front loading mechanism.

A. Cassette cannot be inserted.

Steps to fix cassette insertion problems.

B. Cassette will not eject.

Steps to fix cassette ejection problems.

C. Cassette will not load.

Steps to fix cassette loading failures.

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