[TechAssist] Re: MAGNAVOX 32H800 intermittant shutdown.
- From: "tony saracco" <tcselectronics@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 15 Oct 2003 21:34:56 -0500
Bob,
Thanks for the tip. Seems to have taken care of the problem but also noted
that the 4.7uf 35v cap next to zenior was leaking electrolyte on to memory
chip below so also clean board and replace the cap
----- Original Message -----
From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, October 14, 2003 5:35 AM
Subject: [TechAssist] Re: MAGNAVOX 32H800 intermittant shutdown.
> Tony,
> That sounds like a classic SSB (small signal board) problem. You can
replace
> the entire SSB but due to the cost and subsequent alignments that would be
> required as the EEPROM is on this board, I might suggest you try to repair
> that existing SSB by replacing the problematic 2.4 volt zener diode which
is
> a very common failure on these and can cause a variety of strange or
> intermittent problems. See the following:
>
> SYMPTOM: TV will not turn on from standby. Degauss relay
> can be heard to click on/off. The TV may turn on if the power button
> is held in or pressed multiple times.
>
> CURE: Replace zener diode 6031 on the SSB (small signal board) with
> Service Code 9322 131 13685, a 2.4 volt part. The zener is on the side
> of the SSB facing the tuner, just above pin 5 of IC 7066. The PWB is
marked
> A and K. The end of the part with the bar is K.
>
> Or replace the Small Signal Board.
>
> The 2.4 volt part was used in production from December 1, 2000 forward.
> The set back has a date stamp.
>
> 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: "tony saracco" <tcselectronics@xxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, October 13, 2003 11:04 PM
> Subject: [TechAssist] MAGNAVOX 32H800 intermittant shutdown.
>
>
> > Going on a call tomorrow on a 32H800 mag chassie cust says set will shut
> down after running from an hour to most of day. After shutdown set will
not
> power up again until set sits for 24 hours ( cust has been doing this
> regularly for several weeks and always has to be 24 hours). then symptom
> repetes. I had her unplug set to reset to see if power comes back up when
in
> dead state but no go. Anyone ever have this prob before. anyone have a PDF
> for this set they could Email or upload to members area. Thanks
> > SORRY I FORGOT SIG FILE ON LAST POST
> >
> > Tony Saracco
> > TCS ELECTRONICS
> > Elgin , IL 60120
> > 847-695-1928
> > tcselectronics@xxxxxxxxxxxxxxxx
> >
>
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