23
DV-120-K
5
6
7
8
5
6
7
8
A
B
C
D
E
F
5.2 METHOD FOR DIAGNOSING DEGRADATION OF THE LDS ON THE PICKUP ASSY
SIDE A
1
33
65
97
X4001
J7302
Q8019
Q8020
Q8021
R8073
R8082
R8074
R8077
R8081
R8078
R8080
R8079
R8083
R8085
R8037
R8084
R8039
R8038
R8035
R8036
C8077
C8078
J8001
CP7301
C7317
C7319
C7322
B7304
B7305
B8004
C8036
IC4003
R4059
R4060
R4061
R4062
J8003
R4035
SH4000
Q8018
C8038
L7301
Q4001
IC4001
C2306
C4100
B4001
C2320
C2321
R2309
R2307
R2328
R2319
C4052
IC4005
R4066
C4049
N
R4002
R4027
C4091
C4104
R4040
R4047
W810
R4053
R4054
R4004
C4029
C4002
R4039
W808
R4024
R4025
C4090
C4089
R4014
R4015
R4016
B4007
W829
R4018
R4019
C4006
C4039
C4134
W844
W809
CP2301
W826
R4008
C4010
W816
D4006
C4120
C4119
C4047
C4046
R2342
C2322
R8076
C2323
R2344
R4022
R4075
C4062
C4005
C4007
R4002
R4017
R2308
C4088
C4048
C4051
R4046
D4002
R2326
R7317
L4001
D4003
W805
IC4007
IC4009
R4063
C4076
C4077
CP4004
C7304
C7310
C7313
C7308
C7309
C7307
N
R2301
Q2303
CP2302
Q2302
C2302
CP4002
C7311
Q8005
C4011
W819
C7301
W845
C7318
C7316
CP4003
C7315
C8069
C8070
C8051
R8049
C8057
R8061
C8067
R8063
C8072
C8059
C8058
C8056
R8066
C8073
R8067
R4067
R8059
W818
C8066
R8070
Q8013
R8056
Q8014
R8014
W815
C7333
C4050_1
C2304
Q2301
W856
W861
W860
W862
W863
W855
R4031
R4001
C2311
R2310
C2305
R2316
C2307
C4116
W802
IC2301
W889
C4101
C4102
W888
W891
W839
W821
C8074
C4140
C8053
C4044
IC7302
IC8003
IC4006
W820
IC4004
D7313
R7301
D7314
L7303
L7304
L7305
C4065
W858
W857
W817
IC7301
C7329
C7330
IC7303
W859
C7303
W864
R2317
W877
W879
W881
R7322
W830
W865
C4080
W832
W848
W840
W841
DMJ113A
Q4001
B4001
C2320
C2321
2
307
CP2301
R2308
C4088
NR2301
Q2303
Q2302
0
2
C8051
R8049
C8057
R8061
C8059
C8058
C8056
R8066
R8059
C8066
R8070
Q8013
R8014
C2304
Q
W856
W861
W860
W862
W863
W855
R4031
R4001
C8053
8003
Case when this dia
g
nosis is re
q
uired :
When playback of any disc, including a test disc (D
V
D: GG
V
1025, CD: STD-905), cannot be performed
How to dia
g
nose
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
N
R2301 on the D
V
D MT PCB Assy.
If the voltage is 0.17
V
or higher, the 650-nm LD is degraded.
No playback of a DVD :
Measure the voltage between the two ends of
N
R2301 on the D
V
D MT PCB Assy.
If the voltage is 0.20
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.
D
V
D MT PCB ASSY
for CD laser diode
for DVD laser diode