Ld Power Adjustment - Pioneer DVR-RT602H-S Service Manual

5

6.8 LD POWER ADJUSTMENT

[Purpose]
If the combination of MAIN Assy and LOADER Assy is changed,
the adjusted value for LD power will be shifted, and stable
playback or recording of a disc will become impossible.
Therefore, when the combination of MAIN Assy and LOADER
Assy is changed, LD power adjustment and adjustment for disc
judgment will be necessary.
Be sure to do this adjustment at following cases.
• When replacing MAIN Assy
• When replacing LOADER Assy
[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
[Connections]
• Connections for adjusting the LD power
Special tool for
adjusting the LD power
Note: Before adjusting the LD power, disconnect the power to the HDD and the flexible cable for ATA (40-pin).
• To which the special tool for adjusting the LD power is connected
The right side (see the figure below)
of the connector is for connection of
the flexible cable.
GGF1559
• Setting of the switches on the special tool for adjusting the LD power
Set all five switches to ON.
5
6
Main Assy and writer
CN5601
GGD1477
Connect the 10-pin flexible cable
Special tool for
to the lower part of CN401.
adjusting the LD power
6
7
[Tools to be used]
• Special tool for adjusting the LD power (GGF1559)
• 10-pin FFC flexible cable (GGD1477)
• CD-ROM test disc: CDT-313 (GGV1054)
• DVD dual-layer test disc: DVDT-002 (GGV1036)
HDD
Main Assy
CN1402
CN1401
GGF1559
DVR-RT602H-S
7
8
POWER
SUPPLY
Unit
103
8
A
B
C
D
E
F