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PIONEER VSX-LX70/HDLPWXJ
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of PIONEER VSX-LX70/HDLPWXJ Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 35 (click to view)
5

6

7

8

Step 7: 1st DSP f
CN401 (Pin 20) RESET

j
CN401 (Pin 16)

For the following diagnosis, a digital oscilloscope must be used. SPICLK
A

Is the logic of RST_1 "H" ?

No

Check the output from the DIGITAL MOTHER Assy.

w

Yes R139

Is the clock signal output while the voltage at SPIDS_1 is "L"?

No

Check the output from the DIGITAL MOTHER Assy.

y

Yes R144

Is the logic of RST_1 "H" ? Yes

No

Check the resistors and patterns in the path.

Is the clock signal output while the voltage at SPIDS_1 is "L"?

No

Check the resistors and patterns in the path.

B

Is the logic of RST_1 maintained at "H"? (Does it fall to become "L" periodically?)

k
No It is likely a boot error. (It is very difficult to diagnose which peripheral part of the DSP is in failure.)

Yes CN401 (Pin 19) MOSI

g

Yes R134 REQ_1

Is the clock signal output while the voltage at SPIDS_1 is "L"?

No

Check the output from the DIGITAL MOTHER Assy.
C

z
Does the logic become "H" for a moment when the input stream is changed? No The 1st DSP is in failure. Replace it.

Yes R146

g

Yes CN401 (Pin 21)

Is the clock signal output while the voltage at SPIDS_1 is "L"?

No

Check the resistors and patterns in the path.

AA
Does the logic become "H" for a moment when the input stream is changed? No Check the resistors and patterns in the path.

Yes R142 MISO

h

Yes CN401 (Pin 17) SPIDS_1

Is the clock signal output while the voltage at SPIDS_1 is "L"?

D

No The 1st DSP is in failure. Replace it.

i
Does the logic become "L" for a moment when the input stream is changed? No Check the output from the DIGITAL MOTHER Assy.

Yes CN401 (Pin 18)

x

Yes R137

Is the clock signal output while the voltage at SPIDS_1 is "L"? Yes

No

Check the resistors and patterns in the path.
E

Does the logic become "L" for a moment when the input stream is changed? Yes

No

Check the resistors and patterns in the path.

It is very difficult to diagnose which part is in failure.

F

VSX-LX70
5 6 7 8

35

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Owner's Manual

Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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