Panasonic TH-103PF9UK - Page 20

Power LED Status
OFF
Defective Block
AC Power Cord or P Board
Dead - Power LED does not Light (1/2)
How to find the defective board
Power Supply / Protect Circuit
DS
P(SS)
D
3
D
D
25
DN
DN
2
1210 12
STB3.3V
IC4308
P
9
1
3
P(SC)
P
9
1
3
PC
201
PC
10
DN
3
DS
3
18 18
30 30
FUSE FUSE
F
8
F
F
1
1
3
1
4
AC
F
9
1
4
F903 F904
F900 F901
MPUMPU
IC9011
STB3.3V
STB5V
P
25
10
PC
202
10
P
25
10
PC
203
10
MPU
S
Power
SW
D1603
D1604
D1703
D501
D1603
D1604
D1703
D501
Tr
STB5V
No
Yes (P(SC) NG)
Are fuses F900 and F901
on the F Board open?
No
Yes (P(SS) NG)
Are fuses F903 and F904
on the F Board open?
Fuses in P(SC) Board
No
Yes
Are diodes D1603 or
D1604 on the P(SC) Board
ok?
P(SUS)
Board
P(MULTI)
Board
No
Yes
Are diodes D1703 or
D501 on the P(SC) Board
ok?
No
Yes
P(SUS)
Board
P(MULTI)
Board
No
Yes
Are diodes D1603
or D1604 on the P(SS) Board
ok?
Are diodes D1703
or D501 on the P(SS) Board
ok?
Fuses in P(SS) Board
Continued on page 2/2
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