Pioneer VSX-321-K-P Service Manual page 20

1
A
Step 2: Power supply
CN601 (pin 14)
Is the voltage 0 to 3.3 V?
Yes
IC207 (pin 4)
B
Is the voltage 3.3 V?
Yes
CP104 (pins 1, 2)
Is the voltage 10 V?
Yes
IC609 (pin 3)
C
Is the voltage 5 V?
Yes
IC205 (pin 2)
Is the voltage 3.3 V?
Yes
D
IC206 (pin 2)
Is the voltage 2 V?
Yes
E
IC200
Is IC200 abnormally hot?
Yes
To Step 3
F
20
1
2
CEC_ON
No
Diagonose the MAIN Assy.
sub MICOM 3.3V
No
Check the pin 5 of IC207.
HDMI_10V
No
Diagonose the MAIN Assy.
HDMI +5V
No Check the IC609 and
replace it.
HDMI 3.3V
GND is equal of chassis
No
Is IC205 abnormally hot?
Yes
The output and GND may be short-circuited.
Check the path between them.
HDMI 2.0V
No
Is IC206 abnormally hot?
Yes
The output and GND may be short-circuited.
Check the path between them.
No
Replace IC200.
HTP-071
2
3
No
Replace IC205.
No
Replace IC206.
3
4
4