Pioneer VSX-917V-K Service Manual page 101

5
A
IC952 (Pin 14)
Do
No
convert 3 V into
Replace IC952.
5 V for pin 6
input?
Yes
IC952 (Pin 13)
Do
No
convert 3 V into
Replace IC952.
5 V for pin 7
input?
Yes
To Step 5
Step 5: X'tal
IC802 (Pin 2)
Is there
No
a 24.576 MHz Replace IC802 or X801.
output?
Yes
IC802 (Pin 7)
Is there
No
Check the path to pin 45 of IC801.
a 24.576 MHz
Replace IC802.
output?
Yes
IC802 (Pin 5)
Is there
No
Check the path to pin 30 of IC601.
a 24.576 MHz
Replace IC802.
output?
Yes
To Step 6
5
6
Step 6: DIR
Check that the SPDIF signal is output.
Check that changes by pulling out and inserting the
digital input lines.
IC601 (Pin 1)
Can
observe the
digital signal
?
Yes
IC601 (Pin 5)
Can
observe the
digital signal
?
Yes
IC601 (Pin 44)
Can
observe the
digital signal
?
Yes
IC601 (Pin 42)
Can
observe the
digital signal
?
Yes
IC601 (Pin 7)
Can
observe the
digital signal
?
Yes
Check that the data and clock signals are output.
IC601 (Pin 27)
Is there
a master clock
output?
Yes
IC601 (Pin 24)
Is there
a LR clock
output?
Yes
B
VSX-917V-K
6
7
IN1 (OPT: TV/SAT)
No Check the DIGITAL INPUT Assy,
and parts and patterns in the path.
(0 V ⇔ 4 V)
IN2 (OPT: CD-R/TAPE/MD)
No Check the DIGITAL INPUT Assy,
and parts and patterns in the path.
(0 V ⇔ 4 V)
IN3 (COAX: DVD/LD)
No
Check the parts and patterns
in the path.
(1.65 V center, amplitude more than 0.2 Vp-p)
IN4 (COAX: CD)
No
Check the parts and patterns
in the path.
(1.65 V center, amplitude more than 0.2 Vp-p)
Front IN (OPT: VIDEO2)
No Check the FRONT IN Assy, and
parts and patterns in the path.
(0 V ⇔ 4 V)
MCKO2 (Master clock)
Is the
No
No
voltage of PDN
IC601-pin 31
5 V?
(0 V ⇔ 3.3 V)
Check the other assy.
(surrounding of the
microcomputer)
Replace IC601.
LRCK (LR clock)
No
Replace IC601.
(0 V ⇔ 3.3 V)
7
8
A
B
C
D
E
No
F
101
8