XV-DV353
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7.1.7 METHOD FOR DIAGNOSING DEGRADATION OF THE LDS ON THE PICKUP ASSY
12
CONTACT
SIDE
4
1
SIDE
CONTACT
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1
2
13
54
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1
CONTACT SIDE
1
FC
ICT
C373
C309
CN103
C371
R325
CN101
C372
R375
R373
R372
R371
C310
R326
L308
L309
R374
R315
Q304
R314
R313
R318
Q307
R322
Q308
R321
R310
Q305
R135
C161
R136
R134
C133
C320
C374
C771
L772
C
IC771
R771
C773
R772
C3953
C3954
L3951
L3952
C
R3951
R3952
R3954
R3953
CN5601
2 1
AWM
0
2 1 0
2 1 0
2 1 0
Case when this diagnosis is required :
When playback of any disc, including a test disc (DVD: GGV1025, CD: STD-905), won't play or doesn't play
How to diagnose
In the case mentioned above, degradation of the laser diodes (LDs) mounted on the 06SD Pickup Assy is suspected.
Measure the voltage between the two ends of one of the resistors mentioned below.
Measure the voltage between the both ends of R322 or R325 on the DVDM
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 both ends of R321 or R326 on the DVDM
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 06SD Pickup
Assy.
DVD MAIN ASSY
B
SIDE A
Front side
PICKUP ASSY
CN101
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TEL 13942296513
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299