LG RCT689H Service Manual page 107

PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION
1. Checking Points prior to Repair
Following abnormal phenomena may be repaired by
removal of foreign materials and oil supply. Check if oiling is
required or cleaning status is required.
Determine that necessity of checking and repair.
Checking Points and
Phenomena
Cause
Color beat Pollution of Full-Erase Head
S/N, Color Faded Pollution of Video Head
Pollution of Video Head or
Horizontal, Vertical Jitte
Tape Transport System
Pollution of Audio/Control
Poor Sound, Low Sound
Head
No tape wound or tape
wound loosely. Pollution of Pinch Roller or
FF or REW impossible, Belt Capstan Belt
or slow turning
Deterioration of Clutch
Assembly D37 Torque
Tape loosely wound in
REV or Unloading
Pollution of Drum and
Traveling Device
CAUTIONS
If operation of the position with (O) mark is abnormal even
after removing cause, replace it with substitute product since
it shows damage or wearing.
* No. (1) ~ (12) shows sequence that the tape moves from the supply reel to the take-up reel.)
(3) F/E Head
(5) Drum Assembly
(Video Head)
(4) Base Assembly P2
(2) Tension Post
(1) Supply Reel
Replace-
ment
F/E Head
o
o
Video Head
o
A/C Head
o
Pinch Roller
Belt Capston
o
Clutch
o
Assembly A37
Fig. C-9-3
Fig. C-9-3 Tape Transport System
4-20
Fig. C-9-1 TOP VIEW
Fig. C-9-2 BOTTOM VIEW
(6) Base Assembly
P3
(7) A/C Head
(8) P4 Post
(10) Pinch Roller
(11) Take-up Guide
Post
(9) Capstan Shaft
(12) Take-up Reel