[TechAssist] Re: Proscan PS32108 CTC187CM Tuner Input preamp out?

  • From: Eric Manuel <tvman@xxxxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Sat, 06 Dec 2003 19:31:07 -0330

Hi Peter it,s on the way to your mail box  Eric
Eric Manuel
Deer Lake Nfld
Canada

Peter oliver wrote:
> 
> 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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