[TechAssist] Second Postin: Pioneer VSX 425 Dolby surround w/video.
- From: "Tiberius Kraemer" <ty1k@xxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 6 May 2003 12:38:26 -0700
Pioneer VSX 425 Dolby surround w/video.
This one has me stumped.
Right Front channel was blown, had no problem repairing it.
Tested the unit overnight, at 80% capacity into an 8 ohm load, it is solid
as a rock.
This morning I switched over to surround sound. The distortion is
unbearable.
Clips like crazy at about 30 percent of capacity. Ok, I figured there must
be something wrong with the decoder circuitry. Used old Green-eyes
(Oscilloscope) to check the input to the main amps. Signals are clean.
Jumpered, using coupling capacitors at the output of the pre-amp, to the
bench amplifier. There is no distortion either in normal stereo or Surround
mode audible or visible on the scope at any volume setting.
Must be the Power supply! Wrong! Holds as steady as a rock.
Not having the manual for this unit, I can not figure out why the unit's
main amps distort (clip) only in surround mode.
Your input would be most welcome.
Ty
Tiberius Kraemer
Blue Star Electronics
3312 Silverton Rd. NE
Salem, Oregon, 97303-2753
Phone: 503 391 1491
ty1K@xxxxxxxxx
*****************************************************************************
The Tech Address Book:
http://www.tech-assist.org/secure/tip/contact.html
Add a Repair Tip Here, or Change/Remove your Email Address:
http://www.tech-assist.org/secure/tip/main.html
Lost Password:
http://www.tech-assist.org and select "Lost your Login Info?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
