DV-696AV-S
61
5
6
7
8
5
6
7
8
C
D
F
A
B
E
7.1.5 METHOD FOR DIAGNOSING DEGRADATION OF THE LDS ON THE PICKUP ASSY
CP230
3
CP230
1
C
R2
3
2
6
R2
3
2
7
R23
10
R23
11
R23
13
R23
12
R2
3
1
6
R2
3
1
7
R2
3
1
8
R23
25
C40
02
C40
03
R23
38
R23
32
R23
33
R2
3
3
4
C2
3
1
0
R23
35
C23
11
C23
08
Q23
02
Q2
3
0
4
Q2
3
0
3
Q23
05
R2320
R2322
R2323
R2321
Q23
07
Q23
06
R2
3
0
6
R2
3
0
7
Q23
01
R2
3
0
9
R2
3
0
8
230
3
C23
01
C23
05
W81
9
R23
37
C2
3
2
0
W8
1
7
W8
0
9
To OPTICAL PICKU
CP2301
CP2303
Case when this diagnosis is required :
When playback of any disc, including a test disc (DVD: GGV1025, CD: STD-905), cannot be performed
How to diagnose
In the case mentioned above, degradation of the laser diodes (LDs) mounted on the PICKUP Assy is suspected.
Measure the voltage between the two ends of one of the resistors mentioned below.
Measure the voltage between the two ends of R2321 or R2323 on the DVD MT
PCB Assy. If the voltage is 0.4 V or higher, the 650-nm LD is degraded.
No playback of a DVD :
Measure the voltage between the two ends of R2320 or R2322 on the DVD MT
PCB Assy. If the voltage is 0.4 V or higher, the 780-nm LD is degraded.
No playback of a CD :
If the measurements show degradation
of an LD, replace the PICKUP Assy.
SIDE A
Front side
DVD MT PCB ASSY
A
