Television and Home Theater

LXI Rear Projection Convergence ICs (Magnavox PTV340)

I am trying to fix this LXI 626.54471950 RPTV I aquired.  The set is 19 years old and had/has some issues.  First, I evicted the algae in the Blue and Green CRTs and replaced the fluid in all three guns (with the help of info I gleaned from reading the boards).  I've got the picture pretty well cleaned up, but I'm still having an issue in the upper left corner of the screen, where the convergence is way off.  I'm looking at the Convergence Power Board (A10365-B002) and can't seem to find any info on the ICs.  I see 8 ICs listed on the board (2 x 612479-4 & 6 x N

Mitsubishi WS-55711 Blink Green LED

Last week, my 55711 died. The remote clicks the set on, then immediately off. When I unplug the set, and replug it back in, the LED just blinks then goes off. I read in the Forum that there is a potential fix. I would like the component list to replace & the schematic, or a suggestion of what else to do.

Thanks!

Craig 

Hitachi 50UX58 lost power

I have 12yr old Hit. Ultravision 50UX58. Never had a problem. Used now for games. Getting NO power from remote or 'power' button. I removed rear panel and removed power cord connector from circuit board to make sure getting power, which it is. When I put the connector back on the board 4-5 little green lights on the board came on the a slightly brighter one came a few seconds later and TV gave that 'crackle' sound like it was coming on then everything dimmed off slowly. Any ideas what problem might be and if it is worth the cost of getting fixed? Thanks in advance. Bill

KP-51WS500 is Dead ( Need Possible Faults )

KP-51WS500 is Dead ( Need Possible Faults causing this condition )

For KP-51WS500 or KP-57WS500 or KP-65WS500 or RA6 Chassis

Not getting any blinking codes or steady red light at all

I have tried searching for faults myself but no luck so far

The service manual says a dead condition may be caused by the G-Board

I checked the G-Board for bad solder conditions and found none

I checked the G-Board for bad fuses,diodes,transistors and resistors and found none

MIT WT-42315 Convergence

I have a relative that has a problem with this device in that the blue screen goes out of phaze drasticly after warm up. I have done some research and realize that this is a relatively common problem and the convergence ICs STK-394-250 are suspect. I did check their solder connection(s) to the main PCB w/o effect. The Horzontal (IC8C01 - ID from purchased svcManual) seems to be at fault from my estimate. To add to this, the heat sing is shared with IC8C02 of the same type and the area the suspect IC occupies has a much greater temperature than 02.

RCA 52 dished screen not focused

 I have a 52 inch big screen model P52921 chas# PTK195MB man date 10/99

screen looks dished and out of focus was watching and it just lost focus and dished no noise

or popping, turns on fine and sound fine but can not find proj.adj on menu anymore???

Im not a tech just need some HELP...

Thanks Rob S.

Pages

 

Connect With Techlore