[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 17:21:38 -0400
John, I will check those components you mentioned. On this chassis C7 is
10uf/50v & C11 is 47uf/35v. Do the components you mention cause ON/OFF
cycling problem when the TV is first turned "ON"? The cycle is about every
1-2 seconds, if I turn down the AC to about 90V the cycle becomes longer.
I've checked every darn cap in the VIPUR, MTT module and mainboard, replaced
about 10 questionable and/or open caps already. Still stumped! David
Lessard, Alexandria, Ontario, mr_fixit@xxxxxxxxxxxx
----- Original Message -----
From: "John Conti" <contitv@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, October 14, 2005 5:14 PM
Subject: [TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A -
Dead - Shorted HOT
> David, just a few things to check,c115 (68uf) check r 115(36k)
> cr105,cr408....also check r16 (1.5 ohm)p/n 175331 in the drain terminal of
> Q1 VIR out for increase in value. This is a critical resistor. also c7
> (68uf) c11 (150uf) can cause this problem. And c 108 (.22uf) Hope this
> might help.
> Also if that does't help check all solder connections on the mtt001 or 002
> module.
>
> John
> Conti,sTV
> Texas
>
> >From: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
> >Reply-To: techassist@xxxxxxxxxxxxx
> >To: <techassist@xxxxxxxxxxxxx>
> >Subject: [TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A -
> >Dead - Shorted HOT
> >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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