I rated it already has leaky diodes on switching transformer switching transformer has been a problem for years in thompson Rca etc set is junk HOT may not be bad no odor only reason I checked on the part# is because it was so cheap $5.at mcmonline I rated it already has leaky diodes on switching transformer switching transformer has been a problem for years in thompson Rca etc set is junk HOT may not be bad no odor only reason I checked on the part# is because it was so cheap $5.at mcmonline
Its a refurb sold at Walmart that I found next to a dumpster just barely over a year old.RCA is poison around here I am not going to bother with it unitl after the holidays then I might take another look at it PS In case anyone out there is looking for the transistor that is not mcmonline, its here Its a refurb sold at Walmart that I found next to a dumpster just barely over a year old.RCA is poison around here I am not going to bother with it unitl after the holidays then I might take another look at it PS In case anyone out there is looking for the transistor that is not mcmonline, its here
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Re:
RCA 32V434T Q405 = 268428 confirmed,however the
initial cause of Q405 failure is bad flyback transformer
Part # 271996 Replace both at same time..........T.
I have changed dozens of Thomson IHVT's that had no odor....
Sometimes just the transformer is bad and transistor is still
OK....Usually set clicks three times..............
Leaky diodes related more in the past with failures in CTC169
chassis....big screen and direct view..........T.
I welcome your completed repair feedback...........I have changed dozens of Thomson IHVT's that had no odor....
Sometimes just the transformer is bad and transistor is still
OK....Usually set clicks three times..............
Leaky diodes related more in the past with failures in CTC169
chassis....big screen and direct view..........T.
I welcome your completed repair feedback...........
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i have a sony kv-2197m3 i replaced tr D1878 tv turn on,but image it's bad in horizontal seize and tr D1878 was shorted again
what's the matter? [email protected]Post Solution
Hello, The Horizontal Output transistor needs to be changed as it is most likely shorted. The current transistor on this set is a 2SD3402 (no longer available) it's new replacement part number is the 2SC5902. Order 2 2SC5902 Horiz Output transistors.Replace the transistor by it self once and if all is ok then fine. If not replace it again and also the the Flyback HV transformer. The HOT transistor is probably shorted again and the transformer is causing it.
The Horizontal Output transistor needs to be changed as it is most likely shorted. The current transistor on this set is a 2SD3402 (no longer available) it's new replacement part number is the 2SC5902. Order 2 2SC5902 Horiz Output transistors.Replace the transistor by it self once and if all is ok then fine. If not replace it again and also the the Flyback HV transformer. The HOT transistor is probably shorted again and the transformer is causing it.
Sounds like the high voltage stages aren't firing up. Could be a number of things: Blown fuse, bad horiz output transistor, bad regulator IC, bad flyback transformer.
The reason this happens is because the high voltage also supplies the rest of the voltages needed to operate.
Most times when this unit chirps the horiz output transistor has shorted. If I remember correctly the transistor is Q401. Some times the flyback transformer can be bad as well T401.
The set tries 3 times to come on (3 blinks) if there a problem such as a short, it will cycle without turning on. Unfortunately your set is notorious for having bad flyback transformers. Most likely the horizontal output transistor is shorted as well. Common causes for your symptom are: LL05 (horiz out transformer) RCA part# 257805; TL 02 ( horiz output transistor) 2SC5148; and open connections on the printed circuit board at LL 04 and L14401 (coils) all of which can cause the horizontal output transistor to be shorted.
Can you read the letters and numbers on the transistor your needing to replace? If so post the numbers and I will post a link where you can order them or their substitue.
Confirm service # from back of set = F36650 YX01.......... Transformer red HV lead attaches to CRT & Horiz output xistor is on heatsink next to transformer = 2SC5148 ......... Rca part # 257805 or ASTI 2078 and 237470 xistor............ Do not use a generic transistor = name brand only............T.
oh an easy one LOL That part # is 1-453-268-21 and available at http://www.partstore.com at a price of $82.12. One thing though Make sure you check the horizontal output transistor with all the leads disconnected from the curcuit as this part sometimes goes bad when the fly does. My regular practice with any flyback replacement is to automaticly replace the HOT(horiz. output transistor) as well as resoldering the hhorizontal driver transformer and the horiz. driver transistor. Hope this assist yout repair and makes a happy one. Thats what were here for! Good Luck.
i need the part # for the horz output also!
RCA Part Number for Q405 is 268428 (untested)
I rated it already has leaky diodes on switching
transformer switching transformer has been
a problem for years in thompson Rca etc
set is junk HOT may not be bad no odor
only reason I checked on the part# is
because it was so cheap $5.at mcmonline
Its a refurb sold at Walmart that I found next to a dumpster
just barely over a year old.RCA is poison around here
I am not going to bother with it unitl after the holidays
then I might take another look at it
PS In case anyone out there is looking for the
transistor that is not mcmonline, its here
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