[TechAssist] Re: Sony KP61V25 ***Clicks***
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 21 Nov 2003 10:36:16 -0500
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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SONY KP61V25
Power Control Relay Cycles On And Off. Power Button No Effect
Replace +12v Reg Ic652 On G Board
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SONY KP61V25
Power Control Relay Cycles On/Off
Replace +12v Regulator IC Ic652 On G Board
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SONY KP61V25
Power Control Relay Cycles On/Off With Antenna Connected :
Jeff Stielau : 3/7/03 : Shoreline Electronics Repair
After Changing A Cxa1477as Jungle Chip For Typical Vertical Picture
Distortion. The Set Ran For About 10 Minuted Then Shut Down With The Power
Cycling On/Off. Here Is The Scoop On Fixing It.
Problem Turned Out To Be A Shorted 1uf 50v Poly Cap (C1516) Off Of Pin 7 Of
The Vertical Amp Ic ( Ic1501 Stv9379).
My First Mistake On Troubleshooting This Was That I Had Been Taking
Waveforms About 10 Seconds After The Set Was Turned On & I Assumed We Had No
Vertical Drive From The Cxa1477 Jungle Ic301.
Scoping The V-Drive Pin 30 On Ic301 When The Set Was First Turned On
Revealed Good Drive....Then After 10 Seconds It Will Be Shut Down If The
Cxa1477 Doesn'T See On Vertical Ok Signal Of 7vdc On Pin 28 (Lpf).
Moving To The Vertical Output Ic1501 , We Had The Good Drive On Pin 1 ,
Output Pin 5 Had -15vdc On It...No Output!
Pin 7 Was At 0v....Should Be 1.5vdc , Upsetting The Balanced Input Causing
The Improper Output.
A Lovely Learning Experience On The Ra Chassis!
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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SONY KP53V25
!! Check This Capacitor When Servicing !!
C667 470uf 25v Next To Ic652 On Power Supply Board. We Had This Set In For A
Lighting Hit & Found This One Oozing & Leaking ( Not Caused By Lighting
Hit....Just The Fuse Blew)
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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: "Valley TV" <valleytv@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, November 21, 2003 10:24 AM
Subject: [TechAssist] Sony KP61V25 ***Clicks***
> Hi everybody!
>
> I replaced 1 defective STK convergence IC in this set a few days ago
without any problem but was surprised when the customer called last night
and said since I left, the set would suddenly go off and start clicking. He
put the phone by the set and I could hear the relay clicking. Customer
stated he could turn set off and "sometimes" it would come back on for hours
with a perfect picture but would start clicking (with light flash across top
of screen) as soon as he changed channels.
>
> Anyone run into this before?
>
> TIA!!!!!
>
> Gary
> Valley TV- Berwick, Pa office
> --
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