Ld Power Adjustment - Pioneer DVR-555HX-S Service Manual

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8.2 LD POWER ADJUSTMENT

[Purposes]
If a combination of a main board and PU is
changed, the LD power adjustment and
adjustment for disc judgment needs to be made
for a new combination of the main board and PU
since the adjusted LD-power value becomes
inappropriate for the new combination and stable
playback and recording to disc becomes
impossible.
[Notes]
Never turn the power off while any of the following operations is in progress:
• While laser diode (LD) power adjustment is being performed normally by the unit
• While adjustment for disc judgment is being performed
[Explanation on each adjustment mode]
• Drive Adjustment Mode
This mode is used to select each mode for LD power adjustment.
In this mode, you can confirm an 11-digit number provided for the LD power adjustment.
The 11-digit number is stored in FLASH (IC200) of the main board.
• PU Data Setting Mode
This mode is used to enter an 11-digit number provided for the LD power adjustment.
If you have changed a combination of the main board and PU, enter an 11-digit number marked
on the case of a loader which is provided in pairs with PU.
The LD power adjustment is made by using this 11-digit number.
• Power Adjustment Mode
This mode is used to execute the LD power adjustment and to check the progress of the adjustment.
In case an error occurs during the adjustment, you can also check the error details in this mode.
[How to enter Drive Adjustment Mode]
To enter the Drive Adjustment Mode, press [ESC]+[CX]+[1]+[0] on the remote control unit for service.
Though the LD power adjustment can be executed irrespective of the product functions, do not operate
the product during the LD power adjustment to prevent misadjustment.
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6
[Tools to be used]
GGF1381 : Service Remote Control Unit
GGV1054 : CD-ROM (CDT-313)
GGV1036 : DVD-ROM DL (DVDT-002)
GGV1278 : Blank DVD-R (That's DR-C12WTY5PA)
GGV1282 : Blank DVD-RW (JVC VD-W120XH5)
GGV1284 : Blank DVD-RAM (maxell DRM120C.1P5S)
11-digit
numeric data
DVR-LX60D
6
7
7
8
A
B
C
D
E
F
79
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