This guy has an RCA 42PA30RQ

[Bling23]

Re: This guy has an RCA 42PA30RQ

not sure if I did this right with the bitmap but lets see

[Bling23]

Re: This guy has an RCA 42PA30RQ

Nope I guess not

[tom66]

Re: This guy has an RCA 42PA30RQ

It worked, no thumbnail but it loads on my laptop. Something is definitely wrong. Can you repeat with the Y-buffer unplugged?

[Bling23]

Re: This guy has an RCA 42PA30RQ

oh I did get it right..I can see it on on my ipad

[Bling23]

Re: This guy has an RCA 42PA30RQ

oh that was with the y-buffer ribbons disconnected..let me hook them back up

[tom66]

Re: This guy has an RCA 42PA30RQ

I mean for the whole buffer board to be removed, not just the connectors.

[Bling23]

Re: This guy has an RCA 42PA30RQ

ok

[Bling23]

Re: This guy has an RCA 42PA30RQ

y-buffer disconnected

[tom66]

Re: This guy has an RCA 42PA30RQ

More or less the same. So Y-main or control board is failed. Can you repeat the test on the X-main side?

[Bling23]

Re: This guy has an RCA 42PA30RQ

i replaced the Y-Main yesterday and my x-main has a humming sound coming from it. I checked for shorted components and found q4001 was shorted. its a RJP30E2 0712 part number. i had some new RJP30E2'S i had ordered for the old y-main board, so i replaced the shorted on on the x-main but that didn't do anything to fix the problem. so i ordered a replacement x-main.

[Bling23]

Re: This guy has an RCA 42PA30RQ

this is the waveform when probing the VE testpoint on the y-main

[tom66]

Re: This guy has an RCA 42PA30RQ

Interesting -- definitely something appear shorted. However, I meant to test the X output. This is what goes to the orange ribbon on the righthand side.

[Bling23]

Re: This guy has an RCA 42PA30RQ

Ok but i think i have a bad fet on that board..the Q4001 AND Q4007

[Bling23]

Re: This guy has an RCA 42PA30RQ

my X-Main is dead,,it hums and no reading on the VE test point

[tom66]

Re: This guy has an RCA 42PA30RQ

Can I atleast see the output? Right now I think that both X and Y are bad.

[Bling23]

Re: This guy has an RCA 42PA30RQ

ok

[Bling23]

Re: This guy has an RCA 42PA30RQ

where do you want me to hook up probes on the x-main..on the VE testpoint?

[tom66]

Re: This guy has an RCA 42PA30RQ

On C4020, the leg closest to the black connector.

[Bling23]

Re: This guy has an RCA 42PA30RQ

this is how i have it set up

[tom66]

Re: This guy has an RCA 42PA30RQ

Looks good to me. Your X-main is slightly different to my spare one -- mine does not have that diode -- but it's similar enough.