[TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A - Dead - Shorted HOT
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 15 Oct 2005 17:01:47 -0400
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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