[TechAssist] Re: Sony KV32FS200 shut down instantly,5 blinks. tough FIX
- From: "Damon" <damoneb@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 28 Jul 2005 19:39:53 -0500
5 blinks is IK problems (or Crt problems). Sony does not guarantee that the
Blink codes "specifically" point to the actual problem. They are designed to
"assist" a technician and "possibly help" in the diagnosis......
The fact that the Crt Did Not Light Up indicates that the 5 blinks is
correct.....since the crt didn't light.
Also notice that the B+ OVP and the B+ OCP (1 and 2 blinks) did not come up
since the problem was in a voltage supply NOT Monitored.
Also the Vert (4 blinks) and the HV (6 or 7) didn't occur because they were
validated. What I mean is the signal was present and not tripping a shutdown
circuit.
It's a little tricky, but 5 blinks is very common for a multitude of weird
circuit failures.
Damon B
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, July 28, 2005 12:59 PM
Subject: [TechAssist] Sony KV32FS200 shut down instantly,5 blinks. tough FIX
> 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/
>
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