Pioneer VSX-1018AH-K Service Manual page 32

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