[TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A - Dead - Shorted HOT
- From: "Paul Westcott" <westcott@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 15 Oct 2005 17:28:49 -0400
HA HA
Paul Westcott
Kingsway Electronics
Sudbury,Ontario
Canada
westcott@xxxxxxx
----- Original Message -----
From: "Tel-Tek Electronics" <teltek3@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, October 15, 2005 5:15 PM
Subject: [TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A -
Dead - Shorted HOT
> Gary;
> Although this is old stuff...Cutting that Cap out of the MTT module
> never solved anything for me.
>
> I believe it had something to do with the 12V line...just another
> work-around for RCA.
>
> Also...I think the "RCA" guys that worked on CTC130's are now in
> retirement.;-)
>
> -Ed-
>
> Tel-Tek Electronics
> Ontario-Canada
>
> teltek3@xxxxxxxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Gary McCartney
> Sent: Saturday, October 15, 2005 5:11 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A
> - Dead - Shorted HOT
>
> I have RCA yellow sheet special instructions for CTC130. On it it says
> if you have MTT001A/2B that you are to cut C675, 100uF@16V out of the
> circuit. If you use the module for other chassis besides CTC130, have it
>
> connected back in. I can scan and send this yellow sheet later. It also
> has to do with repeated failure of the HOT.
>
> Gary
>
>
>
>
> David, what does CR426 connect to? I can't find it on the schematic for
> MTT001A. If it is a glass diode that looks like a zener but isn't a
> zener, I'd guess it is a 1N4148.
>
>
>
>
> Gary McCartney
>
> McCartney Electronics
> Guelph Ontario Canada
> Est. 1984
> email: gary (at) number63.ca
>
>
>
>
>
>
>
> Eric Manuel wrote:
>> Hi David I have a zip on the ctc 130 but no parts list..Eric
>>
>>
>> Eric
>> E M Electronics
>> 59 Wights Rd
>> Deer Lake NL
>> Canada
>> A8A 2J2
>> Ph# 709 635 2627
>> tvman@xxxxxxxxxxxxxxx
>>
>>
>>
>>
>>
>> David Lessard wrote:
>>
>>>Eric, CR426...I can find it in the MTT module but can't read the part
>>>number. Part looks like a zener diode, could you please confirm this.
> David
>>>Lessard, Alexandria, Ontario, mr_fixit@xxxxxxxxxxxx
>>>
>>>----- Original Message -----
>>>From: "Eric Manuel" <tvman@xxxxxxxxxxxxxxx>
>>>To: <techassist@xxxxxxxxxxxxx>
>>>Sent: Friday, October 14, 2005 4:58 PM
>>>Subject: [TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER -
> CTC130A -
>>>Dead - Shorted HOT
>>>
>>>
>>>
>>>
>>>>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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