Means , When protector circuit operates for the HV circuit.

Any clues guys :confused:

-bad HV board
-bad LVPS
-shorted/snapped tube

Are usually the most common problem.

Can also be:

- bad H board
-bad neck board

Might try to power up without the RGB input connected. Try the video input also. If still the same what Curt says. Doug

Ahh, this is what's wrong with the XG in the 1292 vs XG thread...


Try unplugging the HV leads for each tube, one at a time (don't get close to the exposed splitter...).

And fire it up in the dark and look for arcing.

Here is where I'm at . There is no H Pulse output from the H OSC IC5501 on the HV Board , this is because the protect 2 circuit is killing it , not sure why yet , but a clue is the 150V (B+ I think) is sitting at about 180V. The 150V adjust pot in the LV Power Supply does nothing to adjust this .

Is this ringing anyones bells ??? Curt Maybe

I have a PDF from Doug for the Fd error - just found it going through my XG stuff.

It's about the HV board, and a bit vague, but PM me your e-mail address and I'll shoot it over.

My big box of spares arrived, but no Powersupply yet, it's in another box I have every board except the C drive. The PS should arrive soon. Happy to send whatever you need up to you to board swap - but you break it you bought it! ;)

Cheers

Mark

Hi Mark , You mentioned something about a PDF for the FD error , I have spent about 15 hours on this fault and am tossing a coin as to whether it's the power supply or the HV board.
Reason is i am still not sure that the 150V rail is seeing a correct load on the HV board and there is not enough head room in the switching PWM of the SMPS voltage control loop . Thus it is sitting at 180V and shutting down the OSC on the HV board .

It's a real Chicken and egg Scenario and would great to have some cards to swap . I am going around in circles.


BTW I am learning a crapload about the XG layout so far .
Interesting tidbit I didn't know the HV for flyback was not at all derived from the H frequency like a normal telly . I suppose it can't as duty cycle would change with multisync frequencies.

I'll send the PDF over tonight.

I do have a spare HV board, but if you can wait, I *should* have a Power supply in the next few days - they were shipped together.

Mark

I'll send the PDF over tonight.

I do have a spare HV board, but if you can wait, I *should* have a Power supply in the next few days - they were shipped together.

Mark

No rush , I really would appreciate it and organise the shipping , Will the PS work on my model ????

Thanks :)

It still could be the flyback at fault :(

Yes, the powersupply will work - it's from a 1101LC - it'll work in any xxx1 series XG (and xxx2 I think as well). It's 110v...DON'T FORGET!!

HV supply is the one part don't think I'm getting (unless he threw it in the box).

If I don't get the HV supply, I'll pass the seller's details to you, he may have it still.

Mark