[TechAssist] Re: GE- CTC187CN DARK WITH RETRACE
- From: "Barry Thompson" <barrystv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 26 Nov 2002 08:37:18 -0500
Change the eeprom first and then check the voltages and waveform on the
video output from the T chip{signal pross.}check the 200 volt line, also
suspect bad spark gaps in the crt socket or a shorted crt.Make sure all your
tuner grounds are soldered,I have lost video beause of this. Barry
barrystv@xxxxxxx
Barrys TV
613 224 3406
Ottawa Canada
----- Original Message -----
From: <southadamstv@xxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, November 25, 2002 4:47 PM
Subject: [TechAssist] GE- CTC187CN DARK WITH RETRACE
>
> I HAVE 31 INCH GE AUDIO OK / NO LUMIANCE. DARK WHEN TURNED ON, WHEN
SCREENS TURNED UP RETRACE LINE AN SOME COLOR ON SCREEN. DON'T HAVE A
COMPLETE SCHEMATIC TO WORK WITH. BUT FROM WHAT DO HAVE THERE IS ONE
TRANSISTOR (Q3301-SYNC AMP) BASE VOLTAGE & SIGNAL ARE CORRECT ABOUT 5.5
VOLTS, BUT THERE BARELY ANY VOLTAGE/SIGNAL ON THE COLLECTOR &MY SCHEMATIC
HAS 8.49 VOLTS ON THE COLLECTOR (NO WAVEFORM CHART FOR THIS AREA). COULD
THIS BE RELATED TO THE EEPROM LOOKS LIKE SOMEONE CHANGED IT SOMETIME BEFORE
IT GOT TO ME. I ALSO RETOUCHED THE TUNER GROUNDS. COULD SOMEONE POINT ME IN
THE RIGHT DIRECTION?
>
> Larry J. Kibodeaux
> South Adams TV & VCR Repair
> 216 1/2 South Adams Avenue
> Rayne, LA 70578
> southadamstv@xxxxxxxxxxxxxxxx
>
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