Pioneer VSX-518-K, Руководство по обслуживанию

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20
VSX-518-K
1 2 3 4
A
B
C
D
E
F
1 2 3 4
Step 6: DIR
IC952 (pin 14)
Do
convert 3 V into
5 V for pin 6
input?
A
B
To Step 5
Replace IC952.
Check the parts and patterns
in the path.
Check the parts and patterns
in the path.
Replace IC601.
Replace IC601.
No
Yes
IC952 (pin 13)
Do
convert 3 V into
5 V for pin 7
input?
Replace IC952.
No
Yes
Check the DIGITAL INPUT Assy,
and parts and patterns in the path.
Check the path to pin 45 of IC801.
Replace IC802.
IC601 (pin 1) IN1 (OPT: TV/SAT)
Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the
digital input lines.
Can
observe the
digital signal
?
No
(0 V <-> 4 V)
Yes
Check the DIGITAL INPUT Assy,
and parts and patterns in the path.
IC601 (pin 5)
IN2 (OPT: CD-R/TAPE/MD)
Can
observe the
digital signal
?
No
(0 V <-> 4 V)
Yes
IC601 (pin 44)
IN3 (COAX: DVD/LD)
Can
observe the
digital signal
?
No
Yes
Yes
Check that the data and clock signals are output.
(0 V <-> 3.3 V)
(0 V <-> 3.3 V)
Yes
IC601 (pin 42)
IN4 (COAX: CD)
Can
observe the
digital signal
?
No
(1.65 V center, amplitude more than 0.2 Vp-p)
(1.65 V center, amplitude more than 0.2 Vp-p)
Check the other assy.
(surrounding of the
microcomputer)
IC601 (pin 27)
MCKO2 (Master clock)
No
No
Yes
Is there
a master clock
output?
IC601 (pin 24) LRCK (LR clock)
No
Is there
a LR clock
output?
Is the
voltage of PDN
IC601-pin 31
5 V?
No
Step 5: X'tal
To Step 6
Replace IC802 or X801.
Yes
IC802 (pin 2)
No
Is there
a 24.576 MHz
output?
Check the path to pin 30 of IC601.
Replace IC802.
Yes
IC802 (pin 7)
No
Is there
a 24.576 MHz
output?
Yes
IC802 (pin 5)
No
Is there
a 24.576 MHz
output?