Pioneer VSX-1022-K Service Manual page 39

5
Step 2: Power supply
IC103 (pin 4)
Is the voltage 3.3 V
output?
Yes
CN9501 (pins 1, 2)
Is the voltage 12 V?
Yes
IC9506 (pin 4)
Is the voltage 5 V?
Yes
IC9501 (pin 3)
Is the voltage 3.3 V?
Yes
IC9503 (pin 2)
Is the voltage 1.8 V?
Yes
IC9502 (pin 3)
Is the voltage 1.2 V?
Yes
To Step 3
5
6
V+3R3_SB
No
Is the voltage pin 5 of IC103
above 6 V?
HDMI+12V
No
Diagonose the MAIN Assy.
V+5_HD
No
Check the IC9506 and its peripheral
circuits or SUB UCOM (IC102).
V+3R3_HHH
No
Check the IC9501 and its peripheral
circuits or SUB UCOM (IC102).
V+1R8_HHH
No
Check the IC9503 and its peripheral
circuits or SUB UCOM (IC102).
V+1R2_HHH
No
Check the IC9502 and its peripheral
circuits or SUB UCOM (IC102).
VSX-1022-K
6
7
No
Diagonose the CPU Assy.
No
Replace the D-MAIN Assy.
No
Replace the D-MAIN Assy.
No
Replace the D-MAIN Assy.
No
Replace the D-MAIN Assy.
7
8
A
B
C
D
E
F
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