Pioneer SX-319V-K Service Manual page 26

1
A
Step 3: Diagnosis
Each data lines confirmation checks it after standby OFF/ON.
CE
CN1002 (Pin 6)
No
Is the voltage
0 to 3.3 V?
Yes
SUB_PDN
CN1002 (Pin 7)
B
No
Is the voltage
0 to 3.3 V?
Yes
MAIN_IRQ
CN1002 (Pin 8)
Is there
No
a data input?
(0 to 3.3 V)
C
Yes
SUB_IRQ
CN1002 (Pin 9)
Is there
No
a data output?
(0 to 3.3 V)
Yes
CSCK_MAIN
CN1002 (Pin 3)
D
Is there
No
a data input?
(0 to 3.3 V)
Yes
SCDO_MAIN
CN1002 (Pin 4)
Is there
No
a data input?
(0 to 3.3 V)
E
Yes
SCDI_MAIN
CN1002 (Pin 5)
Is there
No
a data output?
(0 to 3.3 V)
Yes
F
26
1
2
Diagnose the MAIN Assy.
Diagnose the MAIN Assy.
Diagnose the MAIN Assy.
Check the parts and patterns in
the path IC1003.
Diagnose the MAIN Assy.
Diagnose the MAIN Assy.
Check the parts and patterns in
the path IC1003.
SX-319V-K
2
3
HR_RST
IC1001 (Pin 21)
No
Check the parts and patterns in
Is the voltage
the path pin 87 of IC1003.
0 to 3.3 V?
Yes
IC1002 (Pin 25)
No
Check the parts and patterns in
Is there a data
the path pin 89 of IC1003.
0 to 3.3 V?
Yes
To Step 4
Step 4: X'TAL
IC1003 (Pin 15)
Is there
No
Replace IC1003 or X1401.
a 12 MHz
output?
Yes
IC1003 (Pin 13)
Is there
No
Check the path to pin13 of IC1003.
a 12 MHz
Replace IC1003.
output?
Yes
IC1001 (Pin 5)
Is there
No
Replace IC1001 or X1001.
a 27 MHz
output?
Yes
IC1001 (Pin 4)
Is there
No
Check the path to pin4 of IC1001.
a 27 MHz
Replace IC1001.
output?
Yes
To Step 5
3
4
4