27
XW-NAV1-K
5
6
7
8
5
6
7
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A
B
C
D
E
F
5.3 DIAGNOSIS OF PICKUP ASSY
R5508
R5507
C1761
IC1708
R1731
C1766
Q2301
R2303
Q23
0
4
Q23
0
3
R5518
W
834
W
835
N
R2301
R2305
R2306
R2304
Q2302
C5515
R5515
R5516
R5517
DMJ125A
1
26
51
76
R5508
R5507
Q5502
R5509
R5510
R5505
L4
0
0
3
R4048
R4046
R4047
IC4003
D4001
D4002
B4004
R4022
R5904
W
892
B5902
B5901
R4034
Q5901
C4044
R4033
R4032
R3033
C3004
R3005
R3016
R3017
C3008
IC3004
R3034
R3015
R3014
C3007
C3006
C3010
IC
3005
C3018
W
906
W
907
R3026
R3027
IC
3001
C4055
C4054
R4043
R4044
C4060
C4061
C4062
C4063
W
818
W
823
W
825
R4007
R4008
R4009
R4010
R4005
R4006
R4011
C4017
C4015
C4014
C4016
W
824
W
819
W
817
C4043
IC4002
C4069
C4071
C4068
R4053
IC
4004
R4058
W
850
C4075
C4065
R4054
R4052
Q4002
R4050
W
813
R4012
R4013
R4049
IC
1702
W
858
W
856
W
860
W
857
R2314
R2313
C2314
C2315
C2316
IC2301
C1704
C1705
C1706
IC
1701
IC
1703
C1708
IC
1707
L1706
C1760
C1757
C1753
C1750
C1744
C1745
C1751
C1754
C1758
C1761
L1707
IC1708
Q1706
R1717
R1719
R1720
R1721
C1737
C1723
Q1702
C1701
R1703
C1709
C1711
R1706
Q1705
R1718
C1722
IC1704
R1727
R1704
C1710
R1707
C1712
C1765
R1730
R1737
C1768
R1729
C1763
R1735
C1767
R1731
C1766
C1769
R1738
R4042
R4041
C4052
Q1703
R1714
R1715
C1721
Q1704
IC
1705
C1740
R1728
C1739
C1741
Q2301
R2303
Q2304
Q2303
IC
7003
R7067
R7073
R7065
R7069
C7057
C7060
R7072
R7066
R7075
R7070
IC
7006
C7069
C7071
R7049
C7024
R7050
R7059
R7058
R7042
R7053
C7033
IC
7004
C7027
C7028
C7051
C7029
C7030
C7034
C7035
C7037
C7038
R7083
R7081
R7082
R7080
R7077
R7085
R7076
R7084
C7044
C7043
C7042
IC7007
IC
7
0
0
1
C7001
C7002
R7004
R7003
R7002
R7001
C7081
R7007
C
7
0
0
8
R7010
C7006
IC
7008
R7038
R7039
C7049
C7050
C7074
C7048
R7036
B7010
C7013
C7012
R7013
R7012
C7011
Q7002
Q7001
R
7
0
1
5
R7014
R7018
R7016
R7019
R7017
C7054
C7053
B7002
B7003
W
876
R7033
R7031
R7032
R7034
R7035
R7046
R7043
D7001
D7002
Q7008
Q7007
R7006
C3025
R3025
R3040
C3029
R1766
C2311
C2312
R2309
R2319
W
808
R4020
R4021
C4049
C4050
W
814
W
816
R4014
B4008
W
844
C4056
C4059
C7019
C7018
R7025
R7026
Q7006
C7017
R7024
Q7003
R7022
C7016
R7021
C7080
C7079
Q7005
Q7004
R7020
C4067
R7040
R7041
R4003
R4017
C4024
W
848
W
854
D7004
D7003
R7045
R7079
C5908
C5907
C5906
W
843
R5901
R5902
R5518
R7005
R7060
W
834
W
835
W
832
C1735
C1736
C4064
C7039
C7040
C7041
C7066
C7063
C7068
C7065
C3009
C4042
R1702
R2307
R2310
R2308
R2311
R7028
R7091
R7092
D2301
D2302
R7011
R7027
C4038
C4039
D4003
R3045
W
887
IC4005
R4037
R4056
C4057
Q3001
R3041
N
R2301
R2305
R2306
R2304
Q2302
R7086
R7087
C7059
C7062
W
896
R3046
R7008
R7009
W
916
C5515
C7092
C7091
C7009
C1720
C1734
Q4001
C4073
D4004
R4061
C7100
C
7
0
9
9
R7098
R7097
R5519
W
910
W
888
W
902
W
839
W
838
W
837
W
836
R2315
R3035
W
879
W
878
W
882
W
883
W
909
W
880
W
842
W
840
W
901
W
900
R7094
R5515
R5516
R5517
L7001
C7086
C7088
C
7
0
9
5
C7096
C
70
97
C7098
C7103
C7105
C7106
C7107
C7109
B4006
B4009
B4010
B4007
DMJ125A
for CD laser diode
for D
V
D laser diode
Case when this dia
g
nosis is re
q
uired :
W
hen 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 MAI
N
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 MAI
N
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 LOADER Unit.
D
MAIN ASSY
SIDE B
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