[TechAssist] Re: Proscan PS32108 CTC187CM Tuner Input preamp out?
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 7 Dec 2003 00:05:42 -0500
All grounds resoldered, how about the bad joints on the parts? Did you
resolder any parts? also check the jumpers for the voltage to the tuner. I
am at home now don't have scat here.
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message -----
From: "Peter oliver" <oliver_peter1@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, December 06, 2003 5:15 PM
Subject: [TechAssist] Proscan PS32108 CTC187CM Tuner Input preamp out?
> Proscan
> PS32108
> CTC187CM
>
> Customer rode tuner to oblivion. Resoldered all
> grounds but minimal signal. A picture can be obtained if an input is
> injected on the outboard side (side closest to rear) of L7109
> strong local stations pasable weaker stations magrginal set is in cable
mode
> at the moment didn't try to reprogram for UHF yet. Don't have the
schematic
> for this particular set. I have a scheamtic for a CTC177AA3 Which has a
> number of simmilarities, any one know what the diffreces are? Using the
> CTC177 tuner schematic would sugest that Q7102 (a dual gate surface mount
> FET) may have been compromised since on that schematic that is the output
> from that gain circuit. Does any one think that this may be the case or
> could I Still have a damaged U1001 or EEprom affecting the AGC?
>
> Peter Oliver
> Tucson Radio TV
>
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