[TechAssist] Re: RCA - 27" TV -PMR623ER - CTC130A - Dead - Shorted HOT
- From: mebonnell@xxxxxxxxx (Old TV Man)
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 15 Oct 2005 18:47:22 -0500
No we are not all retired. (Retarded)
Max Bonnell
Bonnell TV
Robinson, IL
Sender: techassist-bounce@xxxxxxxxxxxxx From:
teltek3@xxxxxxxxxxxx(Tel-Tek=A0Electronics) Date: Sat, Oct 15, 2005,
5:15pm (CDT+1) To: techassist@xxxxxxxxxxxxx Subject: [TechAssist] Re:
[TechAssit] RCA - 27" TV - PMR623ER - CTC130A - Dead - Shorted HOT
Reply=A0to: techassist@xxxxxxxxxxxxx
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
=A0=A0=A0=A0=A0=A0Eric
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 =A0 DEAD =A0 LEAKY CR625 IN MTT002B TUNER CONTROL MODULE
=A0=A0=A0=A0Eric
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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