JVC XV-M5GSL, Service Manual

Page: 23 / 62

(No.XA008)1-23
4.7.1 Tool for adjustment
*Stud: One set (four studs), Part number: JIGXVS40
4.7.2 Preparation for adjustment
(1) See the disassembly procedure, and remove the changer mechanism assembly from the main body.
(2) Remove the servo control board attached to the changer mechanism assembly.
(If you disconnect the wires connected to the servo control board, connect them again.)
(3) Attach the four studs to the changer mechanism assembly.
(4) Put the changer mechanism assembly in the center of the main body, and connect the card wire from the connector CN501,
CN502, CN503 on the servo control board.
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.
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 .
Stud
Stud
Stud
Changer mechanism assembly
Servo control board
Changer mechanism assembly
CN502
CN503
CN501
Front
Screw a
Screw b
Screw c
1162 1419
FL Display (Example)
Jitter