JVC XV-M52SL Service Manual page 22

XV-M52SL/XV-M50BK
When replacing a pickup etc., execute the following
adjustments:
Pickup replacement
1. When removing the traverse mechanism from the
changer mechanism unit, move the pickup to the
innermost diameter of the disc and set switch (S11)
on the pick-up board on "SHORT" side, please before
removing the card wire from connector (CN10)
2. Take out the traverse mechanism.
3. First short-circuit the pickup circuit before removing
the pickup. Then carry out the replacement.
Adjustment
Jig setup
1. Remove the rubber cushion from each of the four
corners of the traverse mechanism.
(When installing be sure not to make a mistake with
the cushion colors).
2. Install the jig stud.
3. Make a jig clamp. (Remove the clamp from the set
and assemble it as shown in the diagram below.
Note:
How to handle the pickup
To protect the pickup from electro-static damage,
make sure to hold it by the die-cast chassis (optical
base). And make sure that pickup lens do not touch
the top cover.
How to prepare a clamp
1-22
Pick-up
Traverse
mechanism
Soldering part
Green rubber
cushion
Jig stud
Remove the claws
from the 3 locations
Disassemble the clamp
and holder
Traverse
mechanism
SWITCH S11
Installing the
4 jig studs
Combine the clamp
and holder to become
a jig clamp.
CN10
CN12
SHORT
OPEN
Blue rubber
cushion
Blue rubber
cushion