Sony KJ-32W7 C Series Service Manual page 21

Troubleshooting
3-1-4. NO POWER: DC/DC converter check
Sheet 3
Turn ON board
19.5V_SS,
NO
19.5V_HOLD
OK?
C9196, C9197
YES
STBY_+3.3V
NO
OK?
L9107
YES
STBY_+1.8V,
STBY_+1.0V
NO
OK?
C7374,C736
9
YES
+5V_VBUS
NO
(IC9106) OK?
C9214
YES
+5V_MAIN NO
(IC9101) OK?
SL9104
Refer AYU2L manual
YES
Check LD Board or
Harness
Check LD Board or
Harness
Check IC7304 (1.8V)
or IC7305 (1.0V)
IC9106 broken
YES
MAIN_
PWR
high
NO
IC9101 broken
service sheet
D+1.0V
NO
(IC9103) OK?
SL9110
YES
SYSTE
+3.3V_MAIN_1 NO
M1_P
(IC9104) OK?
SL9107
YES
NO
D+1.1V
(IC9105) OK?
Refer AYU2L manual
SL9108
service sheet
YES
SYSTE
+1.8V_MAIN NO
M2_P
OK?
WR
C9202
high
YES
Refer AYU2L
manual service
+1.5V_DDR
NO
sheet
(IC9104) OK?
SL9109
SYSTE
M3_P
YES
+3.3V_MAIN
NO
(Q9107) OK?
SL9106
Refer AYU2L manual
YES
service sheet
All
DDCON
OK
IC9103 broken
YES
IC9104 broken
WR
high
NO
IC9105 broken
YES
IC9201 broken
NO
IC9104 broken
YES
WR
high
Q9107 broken
NO
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