[TechAssist] Re: Philips M#MS2730c221 / Starts up, then shuts down
- From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 14 Oct 2003 22:39:29 -0400
John,
From Tech Repair CD:
MAGNAVOX\25f8\Shutdown\\\25f8\Replaced 6.8k Ohm Resistor 3495\\\\\\\\
Philips\TS2546C221\Set only stays on for a couple of seconds before going into
shut down\\\25F800\R3488(10
ohm 1/2 watt) open (burnt load resistor for vertical output IC) and vertical
output IC7401
(932212147687)\\\\\\\\
NAP\TS2774C101 27F800\shut down\Magnavox TS2774-C101 Symptom: The set will
turn on then shut down in
about 1-2 sec.\\27F800\Cure: Located defective integrated circuit
7401(STV9379FA) OEM part # 9322 121
47687 Pin 6 shorted to Pin 5.Replaced with STV9379 Sony IC part # 8-759-192-71
but it smoke\Was pulling
excess current on pin 3. Measured the voltages and wave forms at IC pads* all
OK. The set will shut down
in about 3-5 sec* but you can still get voltage and w\Removed Sony IC* checked
OK. (No shorts). Suspecting
the new IC was defective we replaced 7401 with the OEM IC. Everything is
running smoothly now. \Note:
Since we have been working on the new NAP OCV units* this has been the second
report of this type of
problem after a substituted part is used for the vertical outpu\It has become
Official* the Sony Chip will
not substitute the NAP chip. The difference is the suffix (FA) at the end of
the generic part number. I'm
almost positive this\\\\
Jeff Dougherty
Intrepid Video TV/VCR
263 S Front St
Steelton PA 17113
fax...717-564-4952
www.intrepid-video.com www.tech-repair.net
----- Original Message -----
From: "John @ Myers TV" <myerstv@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, October 14, 2003 5:04 PM
Subject: [TechAssist] Re: Philips M#MS2730c221 / Starts up, then shuts down
Shhot! I had that written down, just forgot to include it.
It's an F8 chassis, Bob.
John
----- Original Message -----
From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: October 14, 2003 4:35 PM
Subject: [TechAssist] Re: Philips M#MS2730c221 / Starts up, then shuts down
Is this an F8 or M8 chassis?
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: "John @ Myers TV" <myerstv@xxxxxxxx>
To: "Tech-assist" <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, October 14, 2003 4:24 PM
Subject: [TechAssist] Philips M#MS2730c221 / Starts up, then shuts down
> HI,
>
> This philips model starts up when I press the power button, only to shut
> down about a second later. The only abnormality I can find so far, it that
> the Viotaux 11V supply is only making it up to about 7 V before the set
> shuts down. The other secondary supplies come up to normal, before
shutting
> down.
>
> So far, I've tried changing (C)2486. I was hoping someone had a quick fix
> for this one.
>
> Thanks,
> John Myers
> Myers TV Service Co. Since 1984
> Alliance, OH
> Voice: 330-821-6545
> myerstv@xxxxxxxx
> http://members.ebay.com/aboutme/tvguy07/
>
>
>
>
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