[TechAssist] Re: Philips 20" Chassis#20B800 R425 burns up
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 8 Jan 2004 06:42:51 -0500
I wouldn't chance it, replace both. However, try to take some cold (static)
load checks on that power supply before firing it up. When you do power up
the unit, measure your power supply voltages to see if there is still an
excessive load.
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: <CGRIFF4000@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, January 07, 2004 5:24 PM
Subject: [TechAssist] Re: Philips 20" Chassis#20B800 R425 burns up
> Do you think the fact that I used a 22 ohm and not a .22 ohm could cause
the burning? Or am I most likely in need of IC400?
>
> Chad
> Griffiths TV/VCR
>
> In a message dated 1/7/2004 5:11:21 PM Eastern Standard Time,
geminitv@xxxxxxxxxxxxxxxx writes:
>
> >
> >
> > R425 is actually a 0.22 ohm, 1 watt, Philips part# 483511667254 and it
is a
> > fusible on the raw B+ line from pin 6 of T425 directly into pin 3 of
IC400
> > (which is most likely shorted or has an excessive load). I do not have a
> > schematic I can either send or upload. Sorry!
> >
> > 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: <CGRIFF4000@xxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Wednesday, January 07, 2004 4:58 PM
> > Subject: [TechAssist] Philips 20" Chassis#20B800 R425 burns up
> >
> >
> > > Philips 20" M#PL7120-C121 C#20B800-7562. Unit came in dead with
shorted
> > HOT. After replacing HOT unit was still dead. Found open R425, and
replaced.
> > Unit turns on now but R425 smokes.
> > > Would someone please verify value/specs on R425. I think it is 22ohms.
If
> > my value is correct, any ideas on why this resistor is cooking. I do not
> > have a schematic on this model.
> > >
> > > Chad
> > > Griffiths TV/VCR
> > > Schenectady, N.Y.
>
>
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