Dvd Player; Xv-521Bk/523Gd Xv-525Bk/421Bk - JVC XV-521BK Service Manual

XV-521BK/523GD/525BK/421BK
(4)Flap adjustment of the Pick-up guide shaft
1) Make sure that there is no disc on the tray.
2) Press both the "PLAY" and "OPEN/CLOSE" keys of the main unit to activate the primary
power and "TEST 2 D2" will be displayed on the FL indicator.
Note: If the FL indicator display stops and remains at "TEST 0", unplug the power
cord from the outlet and after waiting at least 1 second, plug it in again. After
the tray open/close procedure has completed, unplug it again and then
perform the initialization procedure again.
3) Press the "OPEN/CLOSE" key of the main unit to draw the tray out.
*Place the test disk (VT-501) on the tray and then press the "OPEN/CLOSE" key.
(Note: Pushing the tray to close it is not possible.)
4) Press the "PLAY" key of the main unit.
5) The "JIT 0000" is displayed on the FL indicator.
Set the FL indicator figure value to its minimum by adjusting the pickup guide shaft flap.
* The test mode is cancelled when the power is turned off.
Measurement
FL Display
Measurement machine
No need
General tool : Hex-head wrench(2mm)
"Flap adjustment" of the Pick-up guide shaft adjusts
"Tangential adjustment machine screw" A and
"Tilt adjustment machine screw" B from the
DVD Mechanism A'ssy bottom.
1. The part at the center on the DVD test disc is
reproduced.
2.The flap adjustment screws is turned alternately
and adjusted like clearly seeing the waveform of
CN104"1" to the way.
Note
1.The tangential adjustment is done finish and,
then, tilt is adjusted.
2.The repeat the adjustment 2-3 times,for best
result.
3.The final adjustment should be tilt adjustment.
1-16
Mode
Adjustment point
Reproduction
Refer to Fig.2
part
Extension cord No.
connections
QUQ605-4040AJ
Refer to Fig.1
Disc
VT-501
CN101 of DVD Servo Control PWB
Extension Cord
DVD Mechanism A'ssy
CN11 of
Connection PWB
Stand
Fig.1

DVD player

200mm
Stand