[TechAssist] Re: Panasonic CT35G25 tuning voltage
- From: "markbrock" <markbrock@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 12 May 2004 08:33:03 -0500
yes, the tuner is good, it worked on the chassis I took it out of, had a
bad tube, the customer admitted putting a metal screwdriver in the back and
trying to get a signal with a piece of wire. at least he admitted to it,
he's shorted the coils to ground etc. blew something eles, I've got some
really high voltages on several of the pins, it may have messed up the
tuner I said was good? what do these tuner's use for isolation like the
cap's in the rf packages? is it in the tuner or on board?, I quoted him
150 bucks and using a salvage tuner, so some actual profit if I can figure
it out, gotta be close as the video jacks work fine, I know these sets had
bad solder problems that he may have agitated with what he crammed in the F
hole, but I've hit them all, guess I'll dig a little and inject rf, guess
I'll actually have to work at this one.
any other ideas appreciated, I'll let you know
brock
----- Original Message -----
From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, May 11, 2004 2:47 PM
Subject: [TechAssist] Re: Panasonic CT35G25 tuning voltage
> From manual for CT35G23, may be close tuner, 11 pin tuner ENV56D37G3.
>
> One end pin is the IF output, the other end pin is AGC. From the AGC end
> and calling that pin 1, pin 2 is tuning voltage TP, pin 3 is ground, pin
> 4 is clock, pin 5 is data, pin 6 is 9 volts, pin 7 is 5 volts, pin 8 is
> NC, pin 9 is 33 volts, pin 10 is NC, pin 11 is IF. No 12 volts anywhere,
> are you sure the salvage tuner is good?
>
****************************************************************************
***************************************
> Since 1972
> Jim Myers
> Telrad Electronics
> Fort Wayne, Indiana
>
>
> markbrock wrote:
> > can't find 12v on tuner, doesn't this need that ? have 41 on BTL 6 on
BPL
> > 4 on SDA and 42 on TU, tuner is ENV56D51G3, tuner is good from salvage
> > unit, original tuner had a screwdriver or something crammed in where
the F
> > connector was, several coils torn up, where does the 12v come from if
its
> > supposed to have it ? video jacks work find, tuner is all snow,
resoldered
> > daughter board and connector pins, no print, and running out of ideas,
> > anyone ?
> > thanks
> > brock
> > Brock Electronics
> > R.R.4 box 237
> > 5208 cr.3385
> > Independence Ks. 67301
> > 620-331-0235
> > fax 331-7191
> >
> > markbrock@xxxxxxxxxxxxx
> > Zenith*Philips*Peavey*Fender*Crate
> > we work on all brands,makes,models
> > of anything that plugs in the wall
> >
> >
>
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