[TechAssist] Re: Sony KV27S66 BA4D shutdown
- From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 01 Aug 2004 21:28:25 +0000
I have schematics both paper and electonic copy, Problem with checking the
voltages is only fet a fraction of a second at plug in, since the supply is
based on strf6626 it has to setup a resonate and feedback loop with the
flyback to get any voltages going, but realy shuts down too quickly to get a
stable reading onlt long enough to get an initial start pulse thru the
flyback.
Peter Oliver
Tucson Radio TV
From: "Damon" <damon101@xxxxxxxxxxxxxx>
Reply-To: techassist@xxxxxxxxxxxxx
To: <techassist@xxxxxxxxxxxxx>
Subject: [TechAssist] Re: Sony KV27S66 BA4D shutdown
Date: Sun, 1 Aug 2004 06:35:42 -0500
Check your + 15 and - 15 supplies from the IHVT...do you have schematics??
Damon Brunger
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, July 31, 2004 4:20 PM
Subject: [TechAssist] Sony KV27S66 BA4D shutdown
| Sony
| KV27S66
| BA4D
| 1999
| Set in shutdown mode. Blinks 4x-sugestive of deflection
failure.
| If several attempts are made and CRT warms see mometary horz line.
Replaced
| vertical IC and also Jungle IC using the newer replacment BS variant, No
| luck still shuts down, sounded like a short but that is sound iis coming
| from degauss coil, have also pulled and rung Flyback. Was thinking could
be
| regulation problem as in the moment of start up the voltage on pin 1(
| comming off B+ thru a 10K) of the opto isolator is ~90v pin 2 from the
error
| amp is ~14V. Transistor portion does not appear to turn on. Power supply
is
| of the quasi resonate variety incorperating STRF6626 have both the
eletronic
| schematic copy and one on paper. [was looking on 2 fronts either someting
| failed spontaiously or was affected by power surge as it is our summer
| thundrstorm season]
|
| Peter Oliver
| Tucson Radio TV
|
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