[TechAssist] Re: Sony TV KV32FS13 -Volume goes to max; locked on Ch 40
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 27 May 2003 08:11:30 -0400
Perhaps this below and also check D2002 (off CN 2001, pin 5):
SYMPTOMS
Intermittent Menu OSD / No Functions
CAUSE
Suggested that he check the Menu and other switches on bottom bezel for
signs of corrosion damage. Temporarily disconnect/ disable these switches to
see if problem resolved.
RESOLUTION
Found that there was corrosion damage on the MENU UP/DOWN switch, S2007.
Note: The zener diodes on the Key lines can become defective, clip at a
lower voltage, causing switching problems or CPU lock up as well.
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: <rogerfixit@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, May 23, 2003 11:18 PM
Subject: [TechAssist] Sony TV KV32FS13 -Volume goes to max; locked on Ch 40
>
> Sony TV KV32FS13
> Problem - Volume rises on it's own. Can lower w/remote or button but goes
> back up.
> Also, unit locked on Ch 40. Have checked/cleaned the buttons.
> Remember something about the buttons on the 'A' board or leaky zener but
> can't find it in notes.
>
> Roger G.
>
> Mr. Fix-It Harrisburg, PA 17110 WebSite-
> http://mrfixit.netfirms.com
> rogerfixit@xxxxxxxx (alternate - rogerfixit@xxxxxxxxxxxxx )
> FAX 801-705-3748 ; Tel: 717-763-7098 (shop) 717-652-1703(home)
>
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