Display Of Current Value Of Laser; Display Of Jitter Value - JVC XV-N5SL Service Manual

XV-N5SL

4.4 Display of current value of laser

(1) Makes to test mode and initializes.
(2) When "CHOICE" key of remote controller is pushed four times, It is displayed on the LCD display, "CHECK".
(3) Afterwards, the laser current value can be switched by pushing the key to remote controller without turning on the disc.
(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.

4.5 Display of jitter value

(1) Makes to test mode and initializes.
(2) When "CHOICE" key of remote controller is pushed four times, It is displayed on the LCD 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 LCD display as follows.
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..)
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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 LCD display becomes a current value as it is by "mA"
unit. becomes 36 mA if displayed as 36.
Laser current value of CD ------ 49 mA or less
Laser current value of DVD ---- 64 mA or less
Values to judge whether the jitter is allowable or not is displayed, instead of actual
jitter values.The displayed values are expressed in hexadecimal numbers.