Pioneer VSX-1018AH-K, Service Manual

Page: 32 / 187

32
VSX-LX51
1 2 3 4
A
B
C
D
E
F
1 2 3 4
Step 8: DSP output (digital)
Yes
Digital output of each CH when inputting the digital
signal with audio.
Replace IC401.
IC401 (Pin 124) Surround L/R data
No
Is the output
0 V fixing?
B
Replace IC401.
Yes
IC401 (Pin 123) Center/LFE data
No
Is the output
0 V fixing?
Yes
IC401 (Pin 123) Center/LFE data
No
Is there
a data output?
Yes
IC401 (Pin 124) Surround L/R data
No Is there
a data output?
Yes
IC401 (Pin 125)
Front L/R data
No
Is there
a data output?
(0 V
⇔
3.3 V)
(0 V
⇔
3.3 V)
(0 V
⇔
3.3 V)
Digital output of each CH when inputting the digital
signal (-
∞
dB (no audio)).
To Step 8
Yes
IC203 (Pin 4) DSDFL (DSD data)
Is there
a data
output?
(0 V
⇔
3.3 V)
Yes
IC203 (Pin 7) BCKI (DSD clock)
IC205 (Pin 3) DSDFR (DSD data)
Is there
a clock
output?
(0 V
⇔
3.3 V)
(0 V
⇔
3.3 V)
No
No
Step 7-5: Switch (SACD only)
Check that the data and clock signals are output.
Check that the data signal is output.
Replace IC203.
Check the path
between pin 1 of IC203
and microcomputer.
No
Is the
voltage Pin 1
of IC203 at
5 V?
Yes
Yes
IC401 (Pin 122)
Surround Back L/R data
No
Is there
a data output?
(0 V
⇔
3.3 V)
Replace IC401.
There is a possibility
of the Boot error.
(Identification of the
defective part near
DSP is extremely
difficult.)
No
Yes
Yes
Is there
a data
output?
(0 V
⇔
3.3 V)
Yes
IC205 (Pin 11)
DSDSL (DSD data)
Is there
a data
output?
No
No
Replace IC205.
Check the path
between Pin 1 /
Pin 13 of IC205
and microcomputer.
No
Is the
voltage of pin 1/
pin 13 of IC205
at 0 V?
Yes
Is the
voltage of
DS0RST at 3.3 V?
(Does it drop to 0V
periodically?)