CurtPalme.com Home Theater Forum

[ronaldus]

Hi everybody,

I finally found the time to do all the maintenance mods on my marquee.

at the moment I'm upgrading caps and mickey mouse resistors on my VDM

I checked the board and the squeeze mod was done (R704, R804 and R904 changed to 56K)

I also found the resistors R705, R805 and R905 changed to 560ohms

I saw those were added without taking out the board as if somebody wanted to to the squeeze mod but made a mistake in resistor value and resistor number. in the schematic it says that the latter resistors should be 1K5

Should I change those values to the factory value or should i leave them in?

the projector worked fine before but i had a problem snow and then when I decreased the height too much the HV drops and comes back.

Could that be related?

Regards,

Ron.

[dvh99]

i have schematics if you`d like them and i would stick with the original values.

pm me if schematics are needed.

[ronaldus]

Hi Dennis,

Thanks for your offer but I have the schematics myself. I had another look and I had the number of the resistors wrong. The value should be 470ohms and is 560ohms so i leave it like it is because the difference it not that big.

Thanks anyway

What i will put back to original is the u2 chip on the neckboard. In my neckboard there was a HFA1100 chip and when i changed it to a EL5166 I got lower bandwidth. I explain it in this thread:

http://www.curtpalme.com/forum/viewtopic.php?p=342838#342838

I only changed that chip and not the u4 (mc34082 originally) I also didn't change any capacitors

Dennis did you put other chips in the neckboards? I'm willing to do one more attempt because the machine is open now.

Cheers,

Ron.