Pioneer VSX-821-K Service Manual page 37

5
B
CP1306 (pin 9)
SCDI_MAIN
No
Is there a data output?
(0 to 3.3 V)
Yes
IC1303 (pin 21)
HR_RST
No
Is the voltage 0 to 3.3 V?
Yes
IC1308 (pin 25)
No
Is there a data 0 to 3.3 V?
Yes
IC1302 (pin 51)
ADV_RST
No
Is the voltage 0 to 3.3 V?
Yes
IC1311 (pin 63)
ABT_RST
No
Is the voltage 0 to 3.3 V?
Yes
To Step 4
5
6
Check the parts and patterns
in the path IC1316.
Check the parts and patterns
in the path pin 87 of IC1316.
Check the parts and patterns
in the path pin 89 of IC1316.
Check the parts and patterns
in the path pin 56 of IC1316.
Check the parts and patterns
in the path pin 59 of IC1316.
VSX-821-K
6
7
Step 4: X'TAL
IC1316 (pin 15)
Is there a 16 MHz output?
Yes
IC1316 (pin 13)
Is there a 16 MHz output?
Yes
IC1303 (pin 5)
Is there a 27 MHz output?
Yes
IC1303 (pin 4)
Is there a 27 MHz output?
Yes
IC1311 (pin 7)(921,40,826)
Is there a 27 MHz output?
Yes
IC1302 (pin 21)
Is there a 28.63636 MHz
output?
Yes
IC1302 (pin 22)
Is there a 28.63636 MHz
output?
Yes
To Step 5
7
8
No
Replace IC1316 or X1303.
No
Check the path to pin 13 of
IC1316. Replace IC1316.
No
Replace IC1303 or X1300.
No
Check the path to pin 4 of
IC1303. Replace IC1303.
Check the path to pin 1,2,6,7
of IC1312. Replace IC1312
or XTAL1300.
No
Replace IC1302 or X1301.
No
Check the path to pin 22 of
IC1302. Replace IC1302.
37
8
A
B
C
D
E
F