[TechAssist] Re: RCA CTC169 (PS27113) HOT Q4401 Shorts after about 30 seconds.
- From: "Shoreline Electronics" <jstielau@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 30 Nov 2005 10:06:36 -0500
Oem output transistor used?
==========================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
jstielau@xxxxxxxx
========================
----- Original Message -----
From: "Dale Lubow" <harristv@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, November 30, 2005 9:09 AM
Subject: [TechAssist] Re: RCA CTC169 (PS27113) HOT Q4401 Shorts after about
30 seconds.
> The timing with my sencore was perfect, I even took out the flyback and
> did
> a dynamic check. I failed to get the run B+ before it went out again.
> Dale
> --
> Dale A. Lubow CET
> Harris TV & Appliance
> 335 Lincoln Way
> Ames, IA 50010
> 515-232-1109 (Voice)
> 515-232-3356 (Fax)
> HarrisTV@xxxxxxxxx
>
>
> On 11/29/05, al m <ampm@xxxxxxx> wrote:
>>
>> 123V is way too low. What was the B+ in run mode? Did you check the
>> timing
>> on the HOT?
>> Al Marquardt
>> ampm@xxxxxxx
>> Al Marquardt Electronic Repair
>> 206 W Main
>> Girardville Pa. 17935
>> ----- Original Message -----
>> From: "Dale Lubow" <harristv@xxxxxxxxx>
>> To: "TechAssist" <techassist@xxxxxxxxxxxxx>
>> Sent: Tuesday, November 29, 2005 11:05 PM
>> Subject: [TechAssist] RCA CTC169 (PS27113) HOT Q4401 Shorts after about
>> 30
>> seconds.
>>
>>
>> > Unit came in with the HOT Q4401 shorted. I thought I would cover all my
>> > bases by replacing CR4401, C4401, CR4402, C4402, C4403, CR4118, C4145.
>> > Also
>> > soldered normal flyback pins, driver transformer pins, Pincushion
>> > transformer pins and any other questionable connections. Before I
>> applied
>> > B+
>> > to the deflection circuit I made sure it wasn't running to high.
>> Actually
>> > it
>> > was running 123 volts in standby which I think is a little low. I even
>> > measured the HV at 29KV before I connected the CRT. So I hooked
>> everything
>> > up, pressed the power button and I had sound and picture. It looked
>> > like
>> > it
>> > was running normally but in about 30 seconds it shut down and shorted
>> the
>> > HOT again. The transistor was even still cold to the touch. Does any
>> > one
>> > have any ideas on what might be going on?
>> > TIA,
>> > Dale
>> >
>> > --
>> > Dale A. Lubow CET
>> > Harris TV & Appliance
>> > 335 Lincoln Way
>> > Ames, IA 50010
>> > 515-232-1109 (Voice)
>> > 515-232-3356 (Fax)
>> > HarrisTV@xxxxxxxxx
>> >
>> >
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