Section 4 ........ Mechanism Of Vcr Part(D - LG RCT689H Service Manual

SECTION 4 MECHANISM OF VCR PART(D-37)
DECK
MECHANISM PARTS LOCATIONS
• Top View ..................................................4-2
• Bottom View ............................................4-2
DISASSEMBLY AND
ASSEMBLY OF DECK MECHANISM
1. Disassembly of Drum assembly ...............4-3
2. Disassembly of Plate top disassembly .....4-5
3. Holder Assembly CST ..............................4-5
4. Disassembly of Gear Assembly
Rack F/L ...................................................4-5
5. Opener Door .............................................4-5
6. Arm Assembly F/L ....................................4-5
7. Lever Assembly S/W ................................4-5
8. Motor Assembly L/D .................................4-6
9. Gear Wheel ...............................................4-6
10. Arm Assembly Cleaner .............................4-6
11. Head F/E ...................................................4-6
12. Base Assembly A/C Head ........................4-6
13. Brake Assembly T .....................................4-7
14. Arm Assembly Tension .............................4-7
15. Reel S / Reel T .........................................4-7
16. Base Assembly P4 ....................................4-8
17. Opener Lid ................................................4-8
18. Arm Assembly Pinch .................................4-8
19. Arm T/up ...................................................4-8
20. Supporter, Capstan ...................................4-9
21. Belt Capstan/Motor Capstan .....................4-9
22. Lever F/R ..................................................4-9
23. Clutch Assembly D37 ...............................4-9
24. Gear Drive/Gear Cam .............................4-10
25. Gear Sector ............................................4-10
26. Brake Assembly Capstan .......................4-10
27. Plate Slider .............................................4-10
28. Lever Tension .........................................4-10
29. Lever Spring ...........................................4-10
30. Lever Brake ............................................4-10
31. Gear Assembly P2/Gear Assembly P3 ...4-11
32. Base Assembly P2/Base Assembly P3 ..4-11
33. Base Loading ..........................................4-11
34. Base Tension ..........................................4-12
35. Arm Assembly Idler Jog ..........................4-12
CONTENTS
DECK MECHANISM ADJUSTMENT
• Fixtures and tools for service .............4-13
1. Mechanism Assembly Mode Check .......4-14
2. Previous Preparation for
Deck Adjustment .....................................4-15
3. Torque Measuring ...................................4-15
4. Guide Roller Height Adjustment .............4-16
4-1. Prior Adjustment ..............................4-16
4-2. Fine Adjustment ...............................4-16
5. Audio/Control (A/C) Head Adjustment ....4-17
5-1. Prior Adjustment ..............................4-17
5-2. Tape Path Check between Pinch
Roller and Take-up Guide ...............4-18
5-3. Fine Adjustment
(Azimuth Adjustment) ......................4-18
6. X-distance Adjustment ............................4-18
7. Adjustment after Drum Assembly
(Video Heads) .........................................4-19
8. Check of Traveling Device after Deck
Assembly ................................................4-19
8-1. Audio, RF Normalization Time
(Locking Time) Check in Play
after CUE or REV ............................4-19
8-2. Check of Tape Curl and
Jam Status .......................................4-19
PROTECTION, MAINTENANCE AND
CHECK OF VIDEO FUNCTION
1. Checking Points before Repair ...............4-20
2. Essential Check and Repair ...................4-21
3. Regular Check and Repair .....................4-21
4. Tools for Check and Repair ....................4-21
5. Maintenance Process .............................4-21
5-1. Removal of Foreign Materials .........4-21
5-2. Grease Application ..........................4-22
TROUBLESHOOTING GUIDE
1. Deck Mechanism ....................................4-24
2. Front Loading Mechanism ......................4-27
EXPLODED VIEWS
1. Front Loading Mechanism Section .........4-29
2. Moving Mechanism Section(1) ...............4-30
3. Moving Mechanism Section(2) ...............4-31
4-1