Diagnosis; Troubleshooting - Pioneer VSX-321-K-P Service Manual

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5. DIAGNOSIS

5.1 TROUBLESHOOTING

A [1] DSP TROUBLESHOOTING
TROUBLESHOOTING FOR ALL DESTINATION
Step 0: Preliminary confirmation
confirm the following items before checking
do screws of COAX jack
securely tighten?
OR connect GND wire of
DSP JIG B'D to chassis.
Yes
B
To Step 1
step 1: B to B connector
CP201, CN601, CN600
Are the connectors
C
securely inserted?
Yes
To Step 2
Step 2: Regulator IC
IC608 (pin 2)
D
Is the voltage of arround
10 V input?
Yes
IC100 (pin 2)
Is the voltage of 3.3 V
output?
Yes
E
IC100 (pin 3)
Is the voltage of 1.2 V
output?
Yes
To Step 3
F
16
1
2
No
Tighten screws securely.
BtoB connector
No
Turn the power off and insert
the connectors securely
* CN600 connectors doesn't connection
in case of DSP JIG B'D use.
(to chassis)
No
Check the resistor (R27, R31)
MAIN Assy.
(to chassis)
No
Replace IC608 or L160.
* If the "sub_pw" is high level to OK.
No
Replace IC102 or IC100.
2
3
Step 3: Regulator IC
IC609 (pin3)
Is the voltage of arround
5 V input?
Yes
To Step 4
Step 4: X'tal
IC602 (pins 39, 40)
Is there a 24.576 MHz
output?
Yes
IC102 (pin 17)
Is there a 24.576 MHz
input?
Yes
To Step 5
HTP-071
3
4
(to chassis)
No
Check the IC1 (pin 3) of
MAIN Assy.
This power is power supply of
IC601 (PCM1681).
No
Replace XTAL101 or IC602.
XMCK
No
Check the IC610 of pin 6 and
check the around of resistor.
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