You can rebuild the Convergence Power Supply assembly or flat out replace
it. Many RCA techs will order the necessary parts and rebuild them. Just
don't replace the STK, there is a reason why it blew out, possibly a shorted
diode in the circuit. Also check the caps in the poser supply regulator on
the main pcb of the set, these have caused failures not related to the
Convergence Supply Problem. Power Line conditioning is done in the main
circuit board.
"Rono" wrote in message
...
RCA 46" projection T.V., M # P46921, CH # PTK195M1A.
Dead, 5 amp gma main fuse blown, horizontal output, drive, &
SCR regulator, all ok! Convergence power board is bad: Reg
IC STK 730-150 has a short between pins 4, & 5, & from
4, 5, to 8 & 9, as well as 10, & 11! I know pins 8, & 9, &
10, & 11 are internally shorted! R 19717, is 30 kohms, but
reads 32.14 kohms within spec? Do you guys, & gals "rebuild"
these modules, or just replace them? If so, do you find them to
be reliable? Most change them! Module is approx. $ 100.00
Canadian, & IC (STK 730-150), is approx. $ 12.00! Is STK
730-130, the same equivilent? I got the same price, then a different
price between the two, in two different suppliers! And no cross at
NTE, just for reference! This unit died while it was off, but plugged
in overnight, & just didn't come on the next day! This is a common
failure! Is there any point to "filter" the A.C. line supplying this pcb,
or,
the main board? Varistors across the line? Rono. Thanks.