Video Head Replacement - Sony AV-3420CE Service Manual

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CAUTION
THE
HEAD
DEGAUSSER
SHOULD
NOT
BE
ALLOWED
TO TOUCH
THE VIDEO
HEAD.
7-3.
VIDEO HEAD
REPLACEMENT
Video
head
replacement
is required
when
the
heads are damaged, worn or have open coils.
Check
the
video
head
output
as indicated
in Sec. 5-4-5.
CAUTION
THE VIDEO
HEAD
ASSEMBLY
AND
THE SUR-
ROUNDING
MACHINED
PARTS
ARE
VERY
PRECISELY
MADE.
USE UTMOST
CARE WHEN
PERFORMING
ANY
WORK
ON
THE
ROTARY
HEAD-DRUM
ASSEMBLY.
Removal
1.
Loosen
the
screws
that
hold
the head-drum
cover.
Lift off the head-drum
cover.
head mounting screw
@P 4x8
screw (A)
Fig. 7-6
4mm Allen wrench
Fig. 7-7
Upper drum removal
7-3

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