[TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A - Dead - Shorted HOT
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 14 Oct 2005 17:19:11 -0400
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.com/
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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