[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 17:40:08 -0400
Does anyone have a CTC130 troubleshooting flowchart kicking around? David
Lessard, Alexandria, Ontario, mr_fixit@xxxxxxxxxxxx
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, October 14, 2005 5:19 PM
Subject: [TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A -
Dead - Shorted HOT
> From my personal card files:
> CTC130: Immediate shut down at turn on. (lowering the AC input with
> variac, unit cycles on/off,HV goes up to 20KV and shuts down.
> Cure: Flyback# 164581.
> CTC130: Picture comes and goes,or erratic turn on: Found choke coil L403
> coupling the +131V source had cold solder.
> CTC131A: Dead, may be intermittant: Chopper output Q101 (metal case).
> CTC130: Dead, blown 5A fuse. Shorted capacitor C425 orange-drop
> type.(.43uf@200V) HOT collector will read zero ohms to ground til yoke
> plug unplugged,then short left.Indicated the yoke return cap was
> shorted.Also R101 (3.9 ohm 10W in the PS) may open
> 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/
>
>
>
> Eric Manuel wrote:
>
> >David check this out..Eric
> >
> >CTC130A DEAD LEAKY CR625 IN MTT002B TUNER CONTROL MODULE
> >
> >
> > Eric
> >E M Electronics
> >59 Wights Rd
> >Deer Lake NL
> >Canada
> >A8A 2J2
> >Ph# 709 635 2627
> >tvman@xxxxxxxxxxxxxxx
> >
> >
> >
> >
> >
> >David Lessard wrote:
> >
> >
> >>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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