[TechAssist] Sony KV32FS200 shut down instantly,5 blinks. tough FIX
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: "techassist@xxxxxxxxxxxxx" <techassist@xxxxxxxxxxxxx>
- Date: Thu, 28 Jul 2005 13:59:18 -0400
This is from a local ASC here I know.Even Sony was at a loss.This fix ,
Sony says,will appear on their web site.
Came in dead.Power surge or lightning suspected by tech.Customer said "no".
Power it on, hear the HV come up, all secondary voltages seemed there,
instantly shut down with 5 blinks.All happened in an instant.
Sony said 5 blinks was a signal loss issue, suggested a ton of
possibilities which he tried. None helped.
Replaced flyback,micro,jungle,etc, then finally the entire "A" board
itself these parts lived on.That's the main chassis. No help. The SMPS
"GK" board seemed to be OK. Then he swapped the power supply GK board
into another Sony and the trouble followed that board!
SD happened too quick to trace with meter, so out comes the trusty O'Scope.
Set to "DC" the tech looked at each and every voltage source at turn on.
The only unusual source was the +7.5 volt source coming out of the
SMPS,went to over +8 volts. He traced that line back to a tiny small SMD
diode on the underneath of the power supply:
D620. (he pulled one off another chassis). It was open.
'Replacement of this SMD diode D620 cured the problem.
Sony was stumped why 5 blinks...
Phil Bader
--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
personal/ alt. email: pbader@xxxxxxxxxxxxxxx
see our ad at:
http://jan-phyl-television-pc-monitor-service.9601288257006.worldpages-ads.com/
-----------------------------------------------------------------------------
This Email List is Public. Remove: http://www.tech-assist.org/remove.htm
Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation
Lost Password: http://www.tech-assist.org and select "Login Problems?".
Email Archives: //www.freelists.org/archives/techassist/
Other related posts:
