[TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A - Dead - Shorted HOT
- From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 14 Oct 2005 15:24:09 -0400
Follow-up:
Replaced HOT, and R426 horizontal drive +B, resistor value was up by
800ohms. TV pulses ON/OFF when ON" button is pressed, TV comes on for a
brief second as power cord is unplugged. I've replaced C672, C654 and C656.
When I disconnect RED wire on standup board next to VIPUR TV pulses ON/OFF.
What am I missing? What are the start conditions for this chassis to
fire-up? I know nothing about this 25 year old chassis. Thanks in advance.
David Lessard, Alexandria, Ontario. mr_fixit@xxxxxxxxxxxx
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, October 03, 2005 9:57 PM
Subject: [TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A -
Dead - Shorted HOT
> Yes.
> Dead,5A fuse blown. Fix: Shorted cap C425 (043uf@200V) yoke return I
think.
>
> After you get it on, here's some issues you may face:
> Brightness a bit exessive,retrace: C122 (30uf@250V) front of flyback.
> Raster narrow at sides, slight bow: Q1 on pincushion upright board near
> rear of chassis. RCA#146847/2N2222A,checks OK-replace it.
> Channels 2-6OK, no 7-13. Open and resolder all stakes inside the MTT001
> module.
> Bands of interference (two) slowely moving up thru picture.: Inside the
> MTT001A, change C654(100uf/16v),C672(220uf/25V),C656(330uf/10V).
> Immediate shut down at turn on:Flyback bad.
> Vert. retrace at top inch of screen.All assoc. caps seem to ESR OK.
> R506(6800ohm/2W) runs hot normally.Remove,scrape leads and resolder.
> Left side jailbars: Workaround: Add a 10uf/250V cap across CRT's PC
> board's stakes, pos. to "C6", neg to "Z1".(saves pulling chassis)
> Excess brightness: C122 (47uf@250)
> Unusual brightness issue: Increase brightness with control,all sudden at
> max: R721 (680ohm) increased to 690ohm. Also: Q703 shorts
> (#143806/NTE159).HTH.
> Phil
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
> personal/ alt. email: pbader@xxxxxxxxxxxxxxx
> see our ad at:
>
http://jan-phyl-television-pc-monitor-service.9601288257006.worldpages-ads.c
om/
>
>
>
> David Lessard wrote:
>
> >This TV has a shorted HOT (C1308K), main fuse is blown. Are there any
common problems besides a bad flyback which could cause this?
> >Thanks in advance,
> >David Lessard
> >Alexandria, Ontario, Canada
> >mr_fixit@xxxxxxxxxxxx
>
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