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46" RCA projo model:P46729BADX1,chassis:PTK169PCA
46" RCA projo tv model:P46729BADX1,chassis:PTK169PCA
(CTC169PC),year:June 1994. One day customer tried to turn it on and all he got was a Pacman type power supply noise (digital noise) for a few seconds,I checked Q4101=SGSIF461=RCA # 200165 and it's not shorted,I also replaced C4102=2.2 uf,100v and C4104=15 uf,50v but still. I don't have a C4108=39 Uf,100v cap in stock nor do I have an ESR meter, I never do service calls nor repair projection tv's so I need as many repair tips as possible as this tv is for a neighbour. Thanks for your time and effort. Sidney E-mail:sidneybek(at)yahoo.com Dartmouth,Nova scotia Canada |
46" RCA projo model:P46729BADX1,chassis:PTK169PCA
I disconnected the HV splitter and still no go,but I found
Q4401F=HOT=2SD1885=RCA # 200167=NTE2324 shorted and R4314U=39 ohms,1/2 watt to be visually burnt (comes from 15v SMPS supply),anyone know what caused these two parts to fail?.Thanks. |
46" RCA projo model:P46729BADX1,chassis:PTK169PCA
I have not yet gone back to my neighbour's place but I have a used 25"
GE TV model:25GT511,chassis:CTC185AA3 and it has a CR4105U=PFR-854=NTE576 can I use that in place of CR4118=164590=NTE580 out of the 46" RCA projo (CTC169PC) that I am working on? as I have noticed that most CR4118's on CTC169s use PFR-851 or 856 or FR-305. Also I pulled a used HOT capacitor out of an old 27" Sony tv and the numbers stamped on the blue cap a PM564J 400V is that a 0.056 MF,400V? because I measured it with my Fluke DMM Series II model:29 and it was 564 nf. Sidney E-mail:sidneybek(at)yahoo.com Dartmouth,Nova scotia Canada |
46" RCA projo model:P46729BADX1,chassis:PTK169PCA
The hold down, box shaped, cap in the HO circuit usually blue or gray.
Don't stray from that value as it sets up the amount of HV. Those can't be off value by more than 3%. And is about 3 times the size of the pin cap. On a rare set I've seen them use orange drop caps or brown caps for the hold down. The .047 sometimes .056 cap is the pin cap, also replace the pin diode across the pin cap. HO caps are rated 1500v or better, pin caps in the HO circuit are 400V or better. Lot of things can blow the HO. The above are the most likely. Then the splitter and HO transformer. It's always a good idea to resolder all the connections in the HO circuit too. good luck. wrote: I have not yet gone back to my neighbour's place but I have a used 25" GE TV model:25GT511,chassis:CTC185AA3 and it has a CR4105U=PFR-854=NTE576 can I use that in place of CR4118=164590=NTE580 out of the 46" RCA projo (CTC169PC) that I am working on? as I have noticed that most CR4118's on CTC169s use PFR-851 or 856 or FR-305. Also I pulled a used HOT capacitor out of an old 27" Sony tv and the numbers stamped on the blue cap a PM564J 400V is that a 0.056 MF,400V? because I measured it with my Fluke DMM Series II model:29 and it was 564 nf. Sidney E-mail:sidneybek(at)yahoo.com Dartmouth,Nova scotia Canada |
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