Electronic equipment repair and service manual search discussion :: Topic review

lee o · Posted: Wed Nov 25, 2009 1:45 am Post subject: need all boards

hey man i need all boards how much for all of them

Dan the TV man · Posted: Fri Nov 06, 2009 3:01 am Post subject: Philips 60pp

Ive got a Philips 51PP9200D/37 with all three pic tubes,Crt boards,and convergence boards.The Crt boards will fit your tv.Ill sell them cheap if you need the parts.The whole tv works exept for the power supply.

rip1980 · Posted: Wed Nov 04, 2009 2:25 pm Post subject:

minnie · Posted: Sun Nov 01, 2009 6:39 pm Post subject:

Start again. Green and blue work, you swapped green and red CRT boards and the green still works but red still doesn't?

rip1980 · Posted: Sun Nov 01, 2009 7:57 am Post subject:

My conclusion on this is it sounds like a short between Screen and ??

I have a couple ideas to try to recover the tube as I doubt i'll be able to get another one. Hopefully it'sjust a wisker or something falled into the neck of the CRT and I can shake it to someplace less trouble some.

rip1980 · Posted: Sat Oct 24, 2009 6:06 am Post subject:

Ummm, it was late when I wrote that, but the last line should be I am pretty sure the CRT board for the red gun was making good contact.

So, thoughts on what it means to have the HV sag out when turning up the red screen voltage? (IE, the blue and green wil ldim and go black if you keep turning up red's screen voltage)

In my testing, I did NOT try putting the green screen voltage on the red tube.

rip1980 · Posted: Thu Oct 22, 2009 3:52 am Post subject:

OK...not mentioned before, but the reason I tried 630 is that's what they appeared to be, not matching the other deflection resistors. They also appeared to be original and not replaced.

Anyway, the higher resistance did let me weakly light the red tube with screen voltage before sagging out and dimming all the guns.

So tonight, I returned it to stock, 6.8 ohms.

I swapped the green and red CRT boards....the clicking (presumibly HV discharge) went away. The red tube would not light, turning the screen voltage up just sags out the other tubes.

However, I know the red gun works (had it running with the higher resistance.)

I'm pretty sure the red CRT was on well. I was surprised at no discharge clicks,

jts1957 · Posted: Mon Oct 19, 2009 9:30 pm Post subject:

Thought he had ascertained were 6.8 ohms? Confused

minnie · Posted: Mon Oct 19, 2009 3:01 pm Post subject:

They should be 6.3 ohm resistors not 630.

rip1980 · Posted: Mon Oct 19, 2009 6:13 am Post subject:

Sorry I havn't been able to get around to messing with this until a today. Strained my back at workand hunching over inside the chassis wasn't a (good) option.

I tacked in the 630ohm resistors and got some stability. I did not have much time to mess with it, but I can get it to light up weakly turning up the screen voltage. It is very out of focus and convergence is way off, but is working and deflecting.

I made no attempt to dial it in until I'm comfortable I know what's going on. I rather not diagnose via smoke.

Turning up the screen voltage, it'll simply click and stop emitting, not cycling like it was.

Laying flat on my back, I was looking over the schematics. There are surge protectors on the CRT boards and one may have gone bad and/or I have might have a path between G2 and something, possibly deflection.

You advice on swapping CRT boards is spot on. I didn't get a chance to do that tonight, but will...while I have it out,I want toinspect it and see if theer are any tattletails (carbon tracks or anything)of something amiss.

Any opinion on how dangerous it would be to lift a leg on the surge protectors and power it up? Maybe after a get my meter on it and insure wedon't have some runaway voltage condition. I may very well be good and doing it's job.