[TechAssist] Re: RCA CTC169L2, Model F26071ES - No vertical
- From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 27 Mar 2002 10:07:48 -0500
You can chase your tail forever on this vertical problem and never find the
cause without a schematic......or a little help. Check the FLYBACK for an
open winding, pins 2 and 3, this winding is in the vertical circuit and you
should have continuity from the vertical yoke, through pin 2 and 3 of the
flyback, to and through pins 1 and 6 of the horiz drive transformer T4301 to
the anode of SCR501 (4501) in the vertical output circuit. If this path is
open.....no vertical deflection.
Problem could also be SCR4501 or ic U4501 or any of the components in that
circuit as well.
Jim Myers
Telrad Electronic Services Co.
Fort Wayne, IN 46815
jr.myers@xxxxxxxxxxx
260-432-4486 Fax and Voice
Fax is always on
----- Original Message -----
From: "Wally & Sue Heise" <sifcamp@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, March 27, 2002 1:02 AM
Subject: [TechAssist] RCA CTC169L2, Model F26071ES - No vertical
Hello Techs,
I am trying to repair a CTC169LC tv that has no vertical deflection,
only has a hor. line across the middle. It has audio and you can tell
there is video in this line. I don't have a schematic so am hoping
someone can lead me in the right direction.
I have already replaced the normal cr4118, c4102, c4104, c4703, c4612
and c4511. All to no avail. The standby voltages and b+ are good (12.2
v. at cr4118 K, and 139 v. at q4401 Col. The horizontal flyback pulse
looks good. I have also checked the yoke, it is very similar in
resistance and inductance as a ctc187 yoke so I suspect it is OK.
If anyone has some suggestions to lead me in the right direction, I
would greatly appreciate it.
Thanks
Wally Heise
South Isle Repair
Isle, Mn.
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