[TechAssist] Re: [TechAssit] RCA - 27" TV - PMR623ER - CTC130A - Dead - Shorted HOT
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 03 Oct 2005 21:57:52 -0400
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.com/
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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