CurtPalme.com Home Theater Forum

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

Hi to all !

Hope it´s okay that i started a new thread , cause for every other user i guess it´s more useful this way.

My Issue:

Something really stupid happened yesterday to me and i really need your help.
After a 10hr run , the bnc cable for RED fell of the Connector cause I tripped (stupid me).

It seem to shorted somehow and the Marquee 8500LC shutdown.

I waited a few minutes checked if the VIM was still seated correctly and started up the Marquee again.
Sadly i don´t get any menu on the screen , or anything from the signal lines.

Got no errorleds on.. and the tubes glow.

Maybe a resistor on the VIM Bad?

Any suggestion what i could check?

Thanx again
Ronald

P.S.: I found a older thread were a other user had to change the HVPS Fuse... i checked that fuse and it´s fine

friedwart

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

@friedwart

Nope.. no leds at all on the LVPS.

Connections are 100% okay.. i reseated almost everything 5 times.

I am clueless !

Cheers
Ronald

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

VIM has most likely shorted out.

Athansios

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

Hey Nashou !

I thought so aswell, are the any known resistors which i could check?

Thanx in advance

Cheers
Ronald

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

The vim is hard to repair from what I have tried. check the two Green fuses that look like resistors . they are the +/- 5 volt lines.

Athanasios

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Guys

Shorting the input does nothing, maybe the vim front panel is bent and the board does not seat right?

.

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

@nashou

You are right again.. one of the Green Fuses are blown.

Will check if i have something similar aroung.. 3Amps i guess at least it´s printed on.

@Tim in Phoenix

Checked the Front panel yesterday.. looks fine to me. (Chassis is in parts so i can see how it connects with a flashlight)

Thanx again for your Tips !

Ronald

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

@nashou

You are my hero !

Replaced the Fuse and the VIM runs again !

Thanx again.. i really owe you !

Cheers
Ronald

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

Well.. fun didn´t last long... again

It ran for about an hour, i changed the Input Frequency via Menu to a higher settings.. and I heard a pop and the picture was gone.

Checked all boards after that if i could see anything visually broken.. nope.

Now i tried to start it again.. i get a ticking noise in the Region of the VNB of the Red tube.
And no picture.

So i tried without the Red HV Line and the Marquee starts normally again.
But the ticking sounds return even than.

If i try again with the Red HV Line in it starts but only ticks and no picture at all.

The Tubes are all glowing aswell ... I checked.

I really think i will salvage this machine for parts cause everyday a new issue pops up.

Sad thing is i put so much effort in cleaning the machine and changing the glycol and so on.

Would have been better to let it run for a few days as some guys here suggested.

Really just wanted to align it one time correctly and watch a movie just to see what I can expect
from the Marquee in general cause i never had an CRT before that.

So it´s a real bummer for me..

Thanx again for your advice...

Ronald

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Keep the red HV connected and try it by removing the black umbilical cord to the red tube and see what happens. the PJ should run for a bit with the red disconnected.

Athanasios

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

@nashou

Removed the Black cord as you told me. Ticking still Sad

Even if i remove the Red HV Lead and the Black Cord it´s ticking.

I just noticed a strong smell in the Front of the Red Tube. Can´t see any arcing anyway....

Any suggestions?

Cheers
Ronald

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Sounds like the hvps, it ticks if bad. Pull it out and smell around it.

Athanasios. Posted from iphom

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

@nashou

Pulled the HVPS didn´t smell anything there.. will take it apart today in check if i can see visible damage.

Cheers
Ronald

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

You will not be able to see it if its in the potted section. That is where the ticking comes from from what others have said.

Most likely you need a new HVPS. Is there anyone close by to test theirs for you?

Athanasios

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

@Nashou

Nope.. i really don´t know anybody in the home theater scene who has a crt .. all digitalos now Wink

But I am in contact with an other user for Germany who will eventually help me out with test boards.

Are your really sure it can be the HVPS??

Cause if i pull the HV Line of Red, the Green / Blue Tube are working normally and show a stable menu.

Thanx again

Ronald

**Curt Palme** · Posted: Mon Nov 14, 2011 3:07 pm Post subject:

IF so, it sounds like your red tube cracked. Fortunately it's the red tube, they are cheap. I've got some if you need one.

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

Hey Curt !

Is there anyway i can check if the Red Tube has cracked?

Be so good and send me a pm with pricing for the tube + shipping to austria...

Thanx
Ronald

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Bodi79 · Joined: 08 Oct 2011 Posts: 130 Location: Austria

@ Tim

Cover was off since yesterday cause i checked for arcing..

No cracks around the front of the tube.. or visible on the phosphor..

Checked the Neck of the Tube aswell... nada .. no cracks visible.

Cheers
Ronald