PIONEER AS-LX70/XJ/UC
Service Manual

1

2

3

4

A

D
IC651 (Pin 14) Is there abnormality at the parts and patterns in the input path?

Step 4-3-1: When a sound is not out with the HDMI (When the source is �dts HD Master Audio�, �Dolby True HD�, �PCM or LPCM at or above the sampling rate of 88.2kHz� or �LPCM Multi ch�)
No IC651 (Pin 1) Replace IC301 or IC651. Is the voltage No Check the path to the microcomputer. HDSW

Is there a LR clock input? Yes IC301 (Pin 26) Is there a bit clock input? Yes

No

B

DIRB Is there a DIRB output of IC301-pin 26 ? Yes

3.3 V? Yes No Replace IC301 or IC3013 or IC651. IC651 (Pin 10) Is there a master clock input (24.576 MHz)? Yes IC651 (Pin 13) HLR Is there abnormality at the parts and patterns in the input path? HMCK Is there abnormality at the parts and patterns in the input path?

No

No

No Replace IC651.

Check the parts and patterns in the input path.

IC651 (Pin 5)
C

Is there a bit clock input? Yes IC3013 (Pin 9) Is there a audio data output? Yes

No

Is there abnormality at the parts and patterns in the input path?

No

Is there a LR clock input? Yes IC651 (Pin 3)

No

No

Replace IC651. Replace IC301 or IC651. HFDT Is there abnormality at the parts and patterns in the input path?

DAUX No Is the voltage of IC3013pin 13 (PDN) 3.3 V? Yes Is there a audio data input? Yes IC651 (Pin 6) HBCK Is there abnormality at the parts and patterns in the input path? No No Replace IC651.

No

D

Check the path to the microcomputer.

Replace IC481. IC301 (Pin 25) DIRD

Is there a bit clock input? Yes

No

No Replace IC651.

Is there a audio data output?
E

No

Is there abnormality at the parts and patterns in the output path?

No

To Step 5-1

Yes IC651 (Pin 2) Is there abnormality at the parts and patterns in the input path?

Replace IC301 or IC651.

Is there a audio data input? Yes To Step 5-1
F

No

No

Replace IC301 or IC651.

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SX-LX70SW
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