[TechAssist] Re: Magnavox 19E800
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 14 Oct 2003 11:22:41 -0400
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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PHILIPS E8
Dead
Gregboyd1@xxxxxxxx
Q7402: But11apx
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PHILIPS E8
Dead. Fuse Ok
Palmetto Electronics, Inc.
Replaced Shorted Transistor 7400 (9332 593 50126) Bf422.
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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: "peggs" <peggs@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, October 14, 2003 12:20 PM
Subject: [TechAssist] Magnavox 19E800
> model PR1903C125
> This set was Dead.
> Only the Power Light would blink 4 times.
> 7400,the Horizontal Drive Transistor was open.
> F422,BF422 crossed to an NTE399,which I put in.
> Set works now,BUT......
> when I plug the Set in,the Horiz. Drive Transistor's B+(collector) is app.
> Zero volts,because there is .7v on the Base............the Transistor is
> Full-on.
> The Resistor that feeds the Horiz. Drive B+ is getting Hot,because it is
> dropping 100v to app. zero.When the Set is on it is dropping 100v to app.
30v.
>
> I can't imagine this is normal.
> I backed up to 7608,a SM transistor,that Drives the Horiz. Drive
Transistor.
> Base 0v
> Collector 2.2v
> Emitter 0v
>
> This is where I get lost.
> Anybody Got a Manual,or any tips for this E8 chassis
>
> Peggs
> Peggs' Electronics
> 1519 West 2nd Street
> Owensboro,KY 42301
> 270-926-4968
> fax 270-686-7399
> peggs@xxxxxxxxxxxxx
>
>
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