Maintenance And Function - LG LH-CX640 Series Service Manual

PROTECTION,
MAINTENANCE
AND CHECK
OF
VIDEO
FUNCTION
4-19
(3)
F/E
Head
(5) Drum
Assembly
(Video
Head)
(4)
Base
Assembly
P2
(2)
Tension
Post
(1)
Supply
Reel
(6)
Base
Assembly
P3
Phenomena
Replace-
ment
Checking
Points
and
Cause
Color
beat
Pollution
of
Full-Erase
Head o
S/N,
Color
Faded
Pollution of Video
Head o
Horizontal,
Vertical
Jitte o
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.
(7)
A/C
Head
(8)
P4
Post
(10)
Pinch
Roller
(11)
Take-up
Guide
Post
(9)
Capstan
Shaft
(12)
Take-up
Reel
*
No.
(1)
~
(12)
shows
sequence
t hat
the
tape
moves
from
the
supply
reel to
the
take-upreel.)
Fig.
C-9-1
T OP
VIEW
Fig.
C-9-2
BOTTOM VIEW
F/E Head
Video Head
A/C Head
Pinch
Roller
Belt
Capston
Clutch
Assembly A37
Fig.
C-9-3
Tape
Transport
System
Pollution
of
Video
Head
or
Tape
Transport
System
Poor
Sound,
Low
Sound
o
Pollution of Audio/Control
Head
o
Pollution
of
Pinch
Roller
or
Belt
Capstan
Belt
No
tape
wound
or
tape
wound
loosely.
FF
or
REW
impossible,
or
slow
turning
Deterioration
of
Clutch
Assembly
D37
Torque
Pollution
of
Drum
and
Traveling
Device
Tape
loosely
wound
in
REV or
Unloading
o
Fig.
C-9-3
1.
Checking
Points
prior
to
Repair
Following
abnormal
phenomena
may
be
repaired
by
removal
of
foreign
materials
and
oil
supply.
Check oiling
is
required
at
the
checking
set or cleaning status is
complete.
Determine
that
necessity
of
checking
and repair the
set
exists
after
checking
the
using
period of the
set together
with
the
user.
In
this
case, followings
must
be
checked: