[TechAssist] Re: RCA P46813BL PTK195AA odd converg. problem
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 23 Sep 2005 10:45:05 -0400
Larry,I did a search in my techCD for ptk195+convergence and pasted
anything maybe useful.
RCA~PTK195~Convergence intermittently pops out~~~PTK195~Fluid
leak…causing Q19324 to short~~~~~~
RCA~PTK195~PINCUSHION* NO CONVERGENCE* NO CONV MENU~~~~R19703(750K-1/4W*
193334)* U19700(STK730-130* 215530)~~~~~~
RCA~P4611LV~Int convergence shift and also bowed slightly from top and
bottom-usually acts up aft 5 to 10 minutes~Can correct per customer by
turning set off and on sometimes takes several times to
correct~~PTK195AA~Bad connections on conv power board especially on
L703~~~~~~
RCA~P61960YX1 PTK195Y06T~Total convergence loss or poor
convergence~Found no power coming from convergence power supply. Removed
convergence yoke plugs one at a time to isolate possible amplifier
overload.~Found overload caused by blue convergence amp. Power supply
now functions~PTK195Y06T~Found R19344 located off emitter of Q19349 DIFF
AMP- BLUE HORIZ measured 18K instead of 9.1K. Replace R19344 (9.1K
1/4W)(176888)~~~~~~
RCA~P52812AB PTK195AB~Dead set after replacing convergence
IC~~~PTK195AB~In this case* disconnected main board from convergence*
start set and tried to start but clicked rapidly~Slowly connected
convergence board and once all connectors were in place set
worked.~Possibly unit's convergence EEPROM was corrupted and got reset.~~~~
RCA~PTK195~Loss of convergence appearing as a pincushion defect along
with no convergence menu item~~~~Q19338 (227406) on the convergence
PCB~The power supply was actually shutting down due to excessive
current~~~~~
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/
Larry E wrote:
>Hi Guys, this set was initially dead, main fuse, HOT & Flyback were changed
>and set came up but now has
>typical bowed convergence problem, customer claims set had no convergence
>issues before set died. I checked
>the Convergence pwr. supply board plug and the only voltage I had was the
>+24, installed a rebuilt 250686
>and the set came up with convergence still bowed, heres the odd part, If I go
>into the cust. menu and pull up
>convergence and choose red or green adjustment, the set does not go to a
>cross, the entire screen goes black,
>the audio quits, there is a soft click or pop in the speakers and then the set
>pops back on with a perfectly
>converged picture and good sound??? It`s like the entire set is turned off and
>immediately back on but I don`t
>hear the HV collapsing just that soft click. once it comes on with a good
>pix/audio I can go into convergence
>set-up and the cross is there and it is adjustable, set may go bad in 20
>seconds or may run 20 minutes but
>shutting off set for 5 minutes or trying to run for long periods of time will
>cause convergence failure,
>ANY IDEAS? worked on a lot of 195`s never seen or heard of anyone having this
>problem, sorry for the long
>post, Larry E
>
>Larry Eastman
>American TV & Electronics
>Crystal River, Fl. 34428
>
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