[TechAssist] Fix update RCA F27450, ATC113BB1 SMPS noise, HOT shorted...
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 10 Dec 2004 13:12:49 -0500
Replaced the HOT (2SC5148, 237470), Flyback (263971).
Since the yert. yoke jack had a wrong plug on it (customer had opened
set and plugged some wires that fit in the wrong jacks on chassis, see
original thread) I replaced the vertical output IC (TDA8172) as a
precaution. All is well now.
Phil Bader
Intrepid Video Support wrote:
>Phil,
>Better send that one to Tristate and get the one year warranty.
>Pull the splitter and see if there is a crack on the bottom.
>Jeff
>--
>Intrepid Video TV/VCR Repair
>263 S Front St, Steelton PA 17113
>717-939-7708; (F) 717-564-4952
>www.intrepid-video.com www.tech-repair.net
>----- Original Message -----
>From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Thursday, December 02, 2004 9:50 PM
>Subject: [TechAssist] update RCA F27450, ATC113BB1 SMPS noise, HOT shorted...
>
>
>I replaced the 2SC5148 HOT and resoldered the base coil. Plugged it in,
>heard the HV come up by itself (may have gone out in a power on state),
>then shutdown. My HOT is OK. I then noticed the customer who broght it in
>had the CRT Dag wire assy plugged up on the vert yoke pins on the yoke.
>Dag was somewhere else.
>Same plug type. This caused some interesting static around the metal
>parts for a second,since the CRT was ungrounded. Gad. I properly placed
>all the plugs where they should go.
> Still, plug it in, in a few seconds, HV comes up good,and immediate
>shutdoen. Think Nimrod toasted the chassis, or maybe the fly is doing
>this, since these have a hi failure rate with flys?
>Bad enough without "junior" helping.
>Phil Bader
>
>Phil Bader wrote:
>
>
>
>>A customer DIY-er opened this dead set after it failed and said the
>>power supply was squeeling. He left the set with me. I found the HOT
>>transistor was shorted (TL02) Hence the squeel.. This set looks like it
>>uses a coil to the HOT base marked L04?, looks like the infamous L4401
>>in the CTC203 that gets loose and destroys the HOT. Possible loose at
>>one end.Think the same here?
>>This is a new chassis to me. Need some common sym/cures related to bad HOTs
>>Thanks,
>>Phil Bader
>>
>>
>>
>>
>>
>
>
>
--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
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