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JVC UX-A7DVD Service Manual page 35

Micro component system
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• Value of current of laser
FL display(Example)
0033
Value of current of laser
As for the value of the current of the laser, the figure displayed on the FL display reaches the current value as it is by the unit
of mA.
It is 33mA if displayed as "0033".
<For DVD>
If the value of the current of the laser is 64mA or less, it is possible to judge simply with about normal.
The deterioration of the laser diode of picking up is thought when there are 65mA or more value of the current of the laser.
<For CD>
If the value of the current of the laser is 49mA or less, it is possible to judge simply with about normal.
The deterioration of the laser diode of picking up is thought when there are 50mA or more value of the current of the laser.
• Jitter measurement value
FL display(Example)
<Please adjust when corresponding to the following.>
- When you exchange picking up.
- When you replace the spindle motor.
- When the reading accuracy of the signal is low.
(The screen sometimes stops in outer which with the block noise to the screen on the disk)
(2) EEPROM initialization
When the ENTER key is pushed in the test mode; Done the intialize for EEPROM of system CPU and unit CPU.
FL display
T
(3) Inside and outside surroundings tracking OFF
After searches for the DA disk to first TR and each last TR when "
OFF is processed.
Remote control "4" button Value of current of laser for CD
0000
Remote control "5" button Value of current of laser for DVD
0033
20A2
jitter value
E
S
T
E
E
P
The jitter value is displayed by the hex
D
R
O
M
" and the "
R
2
" key are pushed in the test mode, tracking
(No.22013)1-35
UX-A7DVD

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