[TechAssist] Re: KV27TS30 Blows Horz. output transistor
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 16 Sep 2003 16:20:29 -0400
Besides what is below, replace C525 (0.47mfd/50V). Make sure you resolder
the horizontal driver transformer. Also replace the VDRs in the power
supply.
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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SONY KV27TS32
Repeat failure of R607, Q601, Q602 & Q591
Roger Carnell
Solder connections bad on Horiz drive xformer
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SONY KV27TS32
Dead
Frank @ HQ Electronics & Satellite
Found Solder Had Cracked And Eroded Away From Emitter Pin Of Hot, Q503 /
2sc4927. Also Found Base Connection Solder Bad. Hot Xistor Was Shorted. It
Also Took Out The Following Power Supply Components:
Q601 And Q602 / 2sc4834,
Vdr601 1-807-288-11
Vdr'S 602 And 603 1-810-053-11,
R607 .1 Ohm 1/2 Watt Fusible Resistor.
Repaired 20-25 Other Bad Solder Connections On The Circuit Board In Various
Circuits, Including Driver Transformer. (Capacitor In Driver Ckt. Primary
Had Been Replaced A Short Time Before By Another Shop.)
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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: "Neil Bowman" <tvdoctors@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, September 16, 2003 1:07 PM
Subject: [TechAssist] KV27TS30 Blows Horz. output transistor
> Sometimes it also blows the regulator and the large resistors next to the
regulator. Changened the flyback and the yoke. Any tips on this unit fom
intermittant blowing of the hot. Previous repairs done but brought back 2
days later. this was done 2 other times. now this time can't get running.
Keeps blowing hot. Any suggestions Thanks, Neil
> TV Doctors
> Monroe,Wa.
>
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