Trouble Shooting; No Power; No Power – Ld Board - Sony KDL-43W7 C Series Service Manual

Troubleshooting

3-1. NO POWER

3-1-1 No Power – LD Board
No Power
Check Fuse F1000
OK
Check DIODE
D1001
OK
Check 19.5V_SS
JL1000
OK
Check Fuse
12V DDCON
F9104
OK
Check connection
harness
CN4001
OK
B* Board
Symptoms
Symptoms
NG: DC Voltage is 0V FUSE F1000
broken
NG: Diode are shorted
DIODE D1001
broken
NG: DC Voltage is 0V
MOSFET Q1003
broken
NG: DC Voltage is 0V
FUSE F9104
broken
DC/DC converter check
NO POWER: MUFFIN
SECTION 3
TROUBLESHOOTING
Size B* Board G* Board H* Board
43" BMX Not applicable HSC3_S_M
50" BMX Not applicable HSC3_S_M
55" BMX Not applicable HSC3_S_M
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