JVC TH-M45 Service Manual page 37

4.7.1 Tool for adjustment
*Stud: One set (four studs), Part number: JIGXVS40
4.7.2 Preparation for adjustment
(1) Set the disassembly procedure, and remove the changer mechanism assembly from the main body.
(2) Disconnect the card wires from the connectors
(3) Attach the four studs to the changer mechanism assembly.
(4) Put the changer mechanism assembly in the main body, and connect the card wires to the connector
DVD servo board.
Studs
Stud
Changer mechanism assembly
4.7.3 Adjustment
(1) Set the unit to test mode.
(2) Press the "CHOICE" key of the remote controller three times, and the FL display is displayed "CHECK".
(3) A "PLAY" key is pushed after insert a test disc (VT-501), and press the numeric key "1" of the remote controller for automatic
adjustment.
(4) After a few seconds, press the numeric key "6" of the remote controller. Then, the FL display displays a jitter value.
(5) Turn the adjustment screws on the underside of the traverse mechanism with Phillips screw driver until the maximum jitter value
is displayed on the FL display. (In this model, a bigger jitter value means a better result.)
NOTE:
Reference values to judge whether the jitter is allowable or not are displayed, instead of actual jitter values.
Screw a
Front
Screw c
CN501 and CN502
Changer mechanism assembly
Stud
To front panel assembly
POINT:
Turn the adjustment screws a and b to the same angle in the
right direction. And turn the adjustment screws a and b to the
same angle in the left direction. Then, turn the screws a and b
in either the right or the left direction to increase the number of
jitter. Don't turn the adjustment screw c.
Screw b
on the DVD servo board.
CN501
DVD servo board
CN502
FL Display (Example)
1162 1419
Jitter
CN501 and CN502 on the
Main body
(No.MB033)1-37