Sony KJ-32W7 C Series Service Manual page 20

Troubleshooting
3-1-4. NO POWER: DC/DC converter check
SHEET 2
IC9104
output or
YES
input short
to GND?
SL9109,
C9171
NO
Q9107
output or
YES
input short
to GND?
SL9106,
C9148
NO
Other part in
YES
Remove +1.5V_DDR line or
IC9104. Still +5.0V_MAIN line
short? broken. (DDR maybe
broken)
NO
IC9104 broken
Other part in
YES
Remove
+3.3V_MAIN line or
Q9107. Still
+3.3V_MAIN_1 line
short?
broken.
NO
Q9107 broken
Check fuse
OPEN
F9101, F9102,
High current surge
F9104, F9105,
F9106.
OK
SHEET 3
20