[TechAssist] Re: CTC169, 27" TV with black video, OSD works

From: MDileo0000@xxxxxxx
To: techassist@xxxxxxxxxxxxx
Date: Sun, 22 Jun 2003 16:06:23 EDT
 You might take a magnified look at the front corner foil pattern of the main 
circuitboard for cracks near the video circuit. I once inadvertently 
misaligned the board and cracked the left front side near the corner edge 
causing a 
loss of video and progam memory. I had induced two clear breaks in the fine 
foil 
pattern. Sometimes grabbing for straws is the shortcut for a repair.

Dominic DiLeo
Atlantic TV
Frreeport, Maine

************************************************************
Do you get video from any of the aux inputs (ch 91)?

Look for "chocolate drop syndrome" that is, in some of the modules they put
a bumper that melts, runs down the pcbs and does lots of strange things.

There is an smd buffer, q2707 pn 215495 at about board location H21.  This
part number q is a high failure item wherever it lives.

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: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, June 22, 2003 11:41 AM
Subject: [TechAssist] Re: CTC169, 27" TV with black video, OSD works


> Kevin,
> If OSD works, you are looking in the wrong area...double check your work,
perhaps you left a cable
> unplugged...easy to do on these babies.
> Perhaps you have a bad tuner...try the video inputs...should be your next
step.
>
> Jeff Dougherty
> Intrepid Video TV/VCR
> 263 S Front St
> Steelton PA 17113
> fax...717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
> ----- Original Message ----- 
> From: "Kevin" <kevintv@xxxxxxx>
> To: "TECH-ASSIST" <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, June 21, 2003 4:57 PM
> Subject: [TechAssist] CTC169, 27" TV with black video, OSD works
>
>
> I have replaced C4403 to cure my horizontal collapse problem (bright
> vertical line).  But now I have no video with tuner. Just a black screen
> and tuner audio.  The OSD is working so that is how I know that the
> horizontal problem is fixed.  The red, blue and green guns measure 200
> volts each-they should measure about 150 volts so that is where my
> problem lies.  The larger resistors and transistors on the neck circuit
> board are not even getting warm.  The proper color signals are not
> getting to the picture tube.  I have difficulty with this type of
> problem so any help would be appreciated.  I have replaced Q2906, I have
> tested every transistor in the video, vertical, horizontal, and
> pincushion circuits (by measuring voltages and comparing them to the
> schematic), I have checked for shorted caps in the vertical circuit, the
> heater voltage is 5.9 volts, and the screen voltage is 300 volts.
> Either I have damaged something as I worked on the set, or the set had 2
> problems.  Is it possible for the video to be blank, and for the
> horizontal collapse to show a bright vertical line-both at the same
> time?  TIA
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
**************
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[TechAssist] Re: CTC169, 27" TV with black video, OSD works

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