JVC XV-S500BK Service Manual page 16

XV-S500BK/XV-S502SL
(4) Display of current value of laser
1) Makes to test mode and initializes.
2) When "CHOICE" key of remote controller is pushed three times, It is displayed on the FL display, "CHECK".
3) Afterwards, the laser current value can be switched by pushing the key to remote controller without turning
on the disc.
FL Display (example)
0042
Laser current value
4) The laser output stops if the "STOP" key to remote controller is pushed.
It can be judged it is simply good if the displayed current value of the laser is smaller than that of the
undermentioned value.
Moreover, there must be a deteriorated possibility and the pick-up must exchange the pick-up more
than the undermentioned value.
(5) Display of jitter value
1) Makes to test mode and initializes.
2) When "CHOICE" key of remote controller is pushed three times, It is displayed on the FL display, "CHECK".
3) The test disk (VT-501) is inserted, and the "PLAY" key to the main body is pushed.
4) The jitter value is displayed on the FL display as follows.
FL Display (example)
0042
In the following cases, please "Flap adjustment of the pick-up guide shaft" referring to the following page.
Before using the TEST disc VT-501, careful check it if there is neither damage nor dirt on the read surface.
< In the following cases, please adjustment >
* When you exchange the pick-up
* When you exchange the spindle motor
* When the reading accuracy of the signal is bad (There is a block noise in the screen etc..)
4 key (laser of CD)
5 key (laser of DVD)
UP key
(for firmware upgrade)
CHOICE key
(switch of mode)
STOP key (laser OFF)
1-16
Remote controller "4" key --- Laser of CD
Remote controller "5" key --- Laser of DVD
As for the current value of the laser, the figure displayed on the
FL display becomes a current value as it is by "mA" unit.
0000
becomes 42 mA if displayed as 42.
Laser current value of CD ------ 49 mA or less
Laser current value of DVD ---- 64 mA or less
1CB4 The jitter value is displayed by the hexadecimal number.
Jitter value
POWER key
STOP key
(for test mode)
(for test mode and jitter value)
PROGRESSIVE
FL Display
Indicator
(for initialize)
PLAY key
PAUSE key
(for initialize)