[TechAssist] Re: Sony KV32S40 power supply question
- From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 05 Sep 2003 01:35:04 +0000
This one has a mind to be stubbron. Replaced IC601, the HOT, and the
fusable. IC601 (MX0841) and C609 promptly exploded. (Very litteraly) the
HOT and the fusable resistor are still fine after replacement. This MX came
from MAT weight, markings and package were consistant with the original,
anyone had problems with these? (needed a few things they had so thew it in
with order)......
Peter Oliver
Tucson Radio TV
From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
Reply-To: techassist@xxxxxxxxxxxxx
To: <techassist@xxxxxxxxxxxxx>
Subject: [TechAssist] Re: Sony KV32S40 power supply question
Date: Tue, 2 Sep 2003 07:52:57 -0400
Don't forget to look for the open fusible resistor in the power supply as
well. The most common causes for HOT failure are solder connections on HDT,
defective flyback, arcing CRT, and there is usually a small electrolytic
(0.47mfd/50V) in the horizontal driver circuit that I always replace on this
vintage.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxxxxxxx
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com
----- Original Message -----
From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, September 01, 2003 7:19 PM
Subject: [TechAssist] Sony KV32S40 power supply question
> Sony KV32S40
> AA-2D chassis family
>
> Unit dead with flashing LED (continous). Has HOT blown, and
MX0841
> shorted. Connections on Horz drve transformer look ok, Will solder
anyway.
> Conection on Horz drive transistor a little poor. Customer claims light
> started blinking, left the room and it was gone. Any caviots for this
> particular supply? Not sony ASC so this series just starting to trickle
in,
> first one of the MX containing series that I recall coming in with power
> supply fault, usually just see the sets with the discretes, schematic
looks
> like they packaged the transisors and the VDR's in one..Yes I was working
> labor day to clean up the backlog from last week, got done at 3:45 and
this
> set came it after 3:00. I'm going to have to order parts on this one and
a
> few other sets tomorrow but ideas in the the shipping interm time may be
> usefull.
>
>
> Peter Oliver
> Tucson Radio TV
>
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