[TechAssist] Re: Philips Magnavox TP3681C101 chassis 36D700-7570
- From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 19 Nov 2002 10:27:07 -0500
Joe,
The width is right on. Unless it was off before there has been no change.
Seems to me that a 1200pF or 2200pF cap on a collector to ground is not
going to significantly affect deflection, only drop noise to ground.
In fact, after playing with a couple of values of caps I find that the cap
has almost no effect at all on the timing or amplitude of the output, but
does in fact reduce some hash riding on the signal and smooths it out a bit.
Leonard G. Caillouet
Service Manager
Electronics World
Gainesville, FL
352-332-5608
352-332-5668 (fax)
----- Original Message -----
From: "Joe Batchelor" <jbc@xxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, November 18, 2002 11:35 PM
Subject: [TechAssist] Re: Philips Magnavox TP3681C101 chassis 36D700-7570
>
> The flyback - yoke is a tuned circuit. Using a 2200 pF in place of a 1200
pF
> at the HOT-C will give reduced width. Make sure that is acceptable.
>
> Joe Batchelor CET TX 80
>
>
> 11/18/02 3:03:22 PM, "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx> wrote:
> >
> >The way I figure it, a 2200 pF cap bypassing a HOT collector to ground
> >should pass the same noise as a 1200 pF cap + some slightly lower
> >frequencies, nowhere near the horizontal output range. As long as the
> >waveform is stable, well timed, the cap isn't getting hot, and the
voltage
> >rating is the same, it should be an acceptable sub, actually a better
part.
> >
> >Normally, I would not substitute this part, but Tritronics (who I
normally
> >use for parts) doesn't have it in stock. Vance Baldwin does, but at
$2.95 +
> >shipping for the cost to get it, I'll give the customer the option when I
am
> >confident my sub is going to be reliable.
> >
> >Any comments?
> >
> >Leonard G. Caillouet
> >Service Manager
> >Electronics World
> >Gainesville, FL
> >352-332-5608
> >352-332-5668 (fax)
> >
> >----- Original Message -----
> >From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Monday, November 18, 2002 2:56 PM
> >Subject: [TechAssist] Re: Philips Magnavox TP3681C101 chassis 36D700-7570
> >
> >
> >>
> >> Philips Force 32 for THAT particular model indicates 2634 is N/U (not
> >used).
> >> 2633 is listed as a 1200pf, 10%, 2KV, ceramic, part# 202055890488.
> >>
> >> Bob Waterman, CET® #RI-28
> >> Master Technician License #9109
> >> Service Manager
> >> Gemini Computer, TV, & Security Alarms
> >> (508)695-7302
> >> (508)695-7769 FAX
> >> geminitv@xxxxxxxxxxxxxxxx
> >> geminitv@xxxxxxx
> >>
> >> ----- Original Message -----
> >> From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
> >> To: <techassist@xxxxxxxxxxxxx>
> >> Sent: Monday, November 18, 2002 2:40 PM
> >> Subject: [TechAssist] Philips Magnavox TP3681C101 chassis 36D700-7570
> >>
> >>
> >> >
> >> > Need value or part number for bypass cap on HOT collector to ground
> >> numbered
> >> > 2633 or 2634. Cap is charred and the location number is unclear.
> >> Installed
> >> > .0022uF/2kV ceramic and output waveform looks clean, solid & cap does
> >not
> >> > get hot, timing of output waveform is good. I think this should be a
> >good
> >> > value but would like to confirm it.
> >> >
> >> > Leonard G. Caillouet
> >> > Service Manager
> >> > Electronics World
> >> > Gainesville, FL
> >> > 352-332-5608
> >> > 352-332-5668 (fax)
> >> >
> >> >
> >> >
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