[TechAssist] Re: CTC187CL - No Raster-Has audio & HV
- From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 7 Mar 2003 09:49:06 -0600
OK. Q5004 on the kine board is called output bias and connectos to each of
the drive transistors thorough a 130 ohm resistor. The collector is 2.1v,
to r5011 680 ohms into the 7.6v run supply. The base is connected to the
7.6v run through r5019 a 4700 ohm resistor, to ground via r5020 1200 ohms
and c5004 1uf.
Wayne Vanaman
Omega Electronics
6904 W Fairfield Dr
Pensacola, Fl. 32506-3310
Wayne@xxxxxxxxxxxxxxxxxxxxx
WWW.PensacolaTVRepair.Com
850-456-5995 voice
850-458-6369 fax
----- Original Message -----
From: <Philstv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, March 07, 2003 9:15 AM
Subject: [TechAssist] CTC187CL - No Raster-Has audio & HV
>
> Hi All. I have this CTC187CL with no raster, it has audio and high
voltage.
> The filaments are lit and channels change. I replaced the LA7610, the
video
> outputs, the bias transistor as well as both filters on the CRT panel,
same
> problem. When scoping the video to the output transistors on the CRT panel
I
> get great video to the base of each transistor, but the collector waveform
is
> cut-off and distorted. Any suggestions?
>
> Phil@Phil's TV
> 34651 Ford Road
> Westland, MI. 48185
> 734-728-5925
> philstv.com - philstv(at)aol.com
>
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