[TechAssist] Re: Compaq monitor MV500 Model 315U
- From: "Technotronic Dimensions" <Steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 4 Sep 2003 14:06:32 -0400
Got an FCC ID ? Had a Chungwah once with Open Filaments but it powered, just
gave a blank Screen.
Ths Cap check is sort of a general Check, because really there is 1500VDC in
actual Operation of the Unit applied to it. I dont think you checked it with
1500V on it right? I use a Sencore and apply 600V there which is the Max it
can go to. Dunno what you used, but I would say if there was a small amount
of Test Voltage it 'could' still read a different capacitance if more is
applied. There could also be an open or a Short in a winding, but you would
need to do a LOPT Ring Test.
Still would be good if you had other FBT numbers to post. This Way I could
check history of Failures.
Steve Hearns
Technotronic Dimensions, NY (USA)
1-877-817-9885 (Voice / Fax US Only)
WWW.TECHNOTRONIC-DIMENSIONS.COM
----- Original Message -----
From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, September 04, 2003 1:42 PM
Subject: [TechAssist] Re: Compaq monitor MV500 Model 315U
> I get 3.1 nF so it looks like its not the fly. This unit has a chunghwa
> picture tube if that means anything
> Phillip R Hull STET
> phil245@xxxxxxxxxxxxx
> FAX 517--569-3075
> Professional Technicians only
> ----- Original Message -----
> From: "Technotronic Dimensions" <Steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, September 04, 2003 11:11 AM
> Subject: [TechAssist] Re: Compaq monitor MV500 Model 315U
>
>
> > Hi Phil:
> >
> > Sounds to me like the FBT is breaking down under load. Post
> the
> > Numbers on the White Sticker on the FBT here, and It may be a known Part
> > that fails alot. You can also Pull the Anode cap, and from there to the
> > ground pins on the FBT, you ought to measure from 2-9 nF. Thats the
> Internal
> > Cap in the FBT, and if its Open or too high in value, it will cause
> shutdown
> > like you are seeing.
> >
> > Steve Hearns
> > Technotronic Dimensions, NY (USA)
> > 1-877-817-9885 (Voice / Fax US Only)
> > WWW.TECHNOTRONIC-DIMENSIONS.COM
> >
> > ----- Original Message -----
> > From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Thursday, September 04, 2003 11:02 AM
> > Subject: [TechAssist] Compaq monitor MV500 Model 315U
> >
> >
> > > I usually do not work on these but I have this one that won't stay on.
> > > When you push the power button the lite turns green and Hi volts comes
> up
> > > for about 4-5 seconds and high volts shuts off and light turns to
amber
> > > color. I checked the best I could without a manual and I have scoped
> the
> > > vertical and its OK. I have 15v ,12v, 75v ,-9 and 8volts and filiment
> are
> > > lit. I checked all the tips I could find but found nothing on this
> > model#
> > > 315U
> > > Any help sure appreciated,
> > > Thanks
> > > Phillip R Hull STET
> > > phil245@xxxxxxxxxxxxx
> > > FAX 517--569-3075
> > > Professional Technicians only
> > >
> > >
> >
>
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