Samsung TXN3075WHFXXAA Service Manual page 57

7-3 No Power
Plug in the
Power Cord
Check Power LED
Abnomal
Check IC901 B+
(3.3VDD)
Abnomal
Check Q804
Abnomal
HC801S
FA801S
FA802S
Abnomal
Check
CN901, CN902
TRANS(12V)
Check F-BOX I
Samsung Electronics
ST-BY : LED
Nomal
Check Reset of IC901 pin 33
Nomal
Check/Replace IC901
2
Check I C
Nomal
Check IC905
E2PROM
Abnomal
Check
Check IC803,
IC802,R827,R829
2
C
Check the oscillation of
X-Tal of IC901 pins 34, 35
Nomal
Check 135V Line
Nomal
Check F-BOX (5V)
Nomal
Check F-BOX
HD/VD
Abnomal
Check
HIC401,Q402
Nomal
Replace F-BOX
Abnomal
Abnomal
Check T444S
FBT B+
Nomal
Check IC801S,
Check the Horizontal
DZ801,DZ802,
PC801S,IC804
Check H-BLK,
V-BLK Line
Troubleshooting
Check
X901, IC904
Abnomal
TR of HC401 "J6920"
7-3