I have an 27" RCA CTC169. Only thing on the screen is one vertical line from
the top to the bottom of the screen. I've replaced a diode around the HOT
and checked several capacitors and resistors in the same vicinity that were
suggested in past questions on the sci.electronics website. All appeared to
test good. Have the RCA service manual and an old scope. I tried to match
the scope readings with what was in the manual but couldn't make heads or
tails of them. Probably not worth sending to a repairman to fix. Any
suggestions would be appreciated. Thank you in advance.

On Mon, 09 Aug 2004 21:32:47 GMT, "PMW" wrote:

I have an 27" RCA CTC169. Only thing on the screen is one vertical line from
the top to the bottom of the screen. I've replaced a diode around the HOT
and checked several capacitors and resistors in the same vicinity that were
suggested in past questions on the sci.electronics website. All appeared to
test good. Have the RCA service manual and an old scope. I tried to match
the scope readings with what was in the manual but couldn't make heads or
tails of them. Probably not worth sending to a repairman to fix. Any
suggestions would be appreciated. Thank you in advance.


Something is open in the horizontal deflection section. Check the yoke
horizontal coils for continuity. If it's okay, it's somewhere else in
that section. If it's open, it'll depend on whether this pre-dates the
bonded yokes, and if so, if a yoke can be found anywhere.

It may be worth repairing, as it's a good chassis...other than CRT
replacement (which a bonded open yoke would require).

Tom

Loss of horiz deflection, open yoke, defective components in yoke return,
pcc circuit problems.
"PMW" wrote in message
. net...
I have an 27" RCA CTC169. Only thing on the screen is one vertical line
from
the top to the bottom of the screen. I've replaced a diode around the HOT
and checked several capacitors and resistors in the same vicinity that
were
suggested in past questions on the sci.electronics website. All appeared
to
test good. Have the RCA service manual and an old scope. I tried to match
the scope readings with what was in the manual but couldn't make heads or
tails of them. Probably not worth sending to a repairman to fix. Any
suggestions would be appreciated. Thank you in advance.

Forgot to replace the plastic retangular blue or grey capacitor, this
is easy to see, it is swelled up on the sides. I think C4403, this is
in parallel with coil to one side of horizontal yoke circuit on the
chassis.

This is really the only part that causes this problem. It varies by model as a
..43-.51mfd or therabouts. It's very easy to determine whether its bad with a
scope. Do you have 300v of horiz on one side of it and zero on the other? If so
it's open. It's a coupling capacitor, should be close the same on both sides.
Ron

On Mon, 09 Aug 2004 21:32:47 GMT, "PMW" wrote:

I have an 27" RCA CTC169. Only thing on the screen is one vertical line from
the top to the bottom of the screen. I've replaced a diode around the HOT
and checked several capacitors and resistors in the same vicinity that were
suggested in past questions on the sci.electronics website. All appeared to
test good. Have the RCA service manual and an old scope. I tried to match
the scope readings with what was in the manual but couldn't make heads or
tails of them. Probably not worth sending to a repairman to fix. Any
suggestions would be appreciated. Thank you in advance.



Forgot to replace the plastic retangular blue or grey capacitor, this
is easy to see, it is swelled up on the sides. I think C4403, this is
in parallel with coil to one side of horizontal yoke circuit on the
chassis.

When you view from back towards chassis, in front of this horizontal
heatsink slightly to the right is the plastic capacitor orieted north
& south.

Cheers,

Wizard

On Mon, 09 Aug 2004 21:32:47 GMT, "PMW" wrote:

I have an 27" RCA CTC169. Only thing on the screen is one vertical line from
the top to the bottom of the screen. I've replaced a diode around the HOT
and checked several capacitors and resistors in the same vicinity that were
suggested in past questions on the sci.electronics website. All appeared to
test good. Have the RCA service manual and an old scope. I tried to match
the scope readings with what was in the manual but couldn't make heads or
tails of them. Probably not worth sending to a repairman to fix. Any
suggestions would be appreciated. Thank you in advance.


Oh, model code (full model) is necessary so I can send you part number
to get the replacement capacitor.

Cheers,

Wizard