CurtPalme.com Home Theater Forum

[gjaky]

Hi!
There is an old man in my area who used to do some business with crt projectors, now he is moved on rptv-s, but has some stock. He has an electrohome marquee he can't tell the exact model, but it has 9" LC tubes (the lenses were took off). He said it is generally working, but it has some trouble with the composite input (after 5-10 min the picture going off) but no problem with RGB, two of the chambers are now bleeding, but virtually absolute no tube wearing, it has green C-element, red and blue are clear, I think he would give HD10 lenses with it. He asks 500$ for it. Is it worth that price?

[Tim in Phoenix]

Hello

Get the information from the label in front, model, build date, chassis version (38P-xxxxx) and we can tell you what it is.

.

[Nashou66]

[-Pjackso]

I'm no expert on pricing CRTs, but the big factors is:
It works, and appears to have good tubes.

Even though the tubes look good, check the P19 voltage. There have been many snow-white tubes with weak emission. (i.e. weak/dim light output) If P19 is good, then it sounds like a decent to good deal to me.
It does needs new gycol (possible bellows), and a possible replacement board.


At worst, you could part it out and break even.

[gjaky]

I think I'll go there only in the next year...

[dvh99]

http://www.curtpalme.com/MarqueeBellows.shtm

if the bellows feel moist you have to take out the tubes (or he does) and drain the glycol-glycerol mix at once.
do not flush it through the sink.

38-p15297-st, this is an example, you can find it under the front lid that is over the lenses.

[-Pjackso]

For the P19 voltage, reference Tim's website: etechvideo.com.
Reference "Marquee Gray Scale Setup" step J.

http://etechvideo.com/techtip1.htm


Look at the rest of the website for other good info.

[dturco]

[-Pjackso]

Sorry, P-something or other...
You're probably right. It's in the link.


....Just checked, you're right. Check the P-14. (not P-19)

[gjaky]

Ok, I got the infos.
Unfortunately didn't have the chance, to turn it on...
The marquee is a 9000: Model: 38-P13092-94 1994. JUNE Serial:04242001
He has an other one, it is a 7500: 38-P11075UK 1995. OCTOBER (this one is literally good, with HD8 lenses)
The solutions:500$ the 9000, for ~875$ I can get both marquee. Or for 1000$ I can get both marquee + a NEC 6/9PG plain or plus (don't know exactly) good condition, with a lot of spare boards.
How does it sounds to you?

[Curt Palme]

if the 9000 tubes are good and you transplant them into the 7500 chassis, you could have a decent set. You most likely still need 3 new bellows though, so you'd have some work to do.

[Curt Palme]

if the 9000 tubes are good and you transplant them into the 7500 chassis, you could have a decent set. You most likely still need 3 new bellows though, so you'd have some work to do.

[Nashou66]

Id get both marquee's and do the tube swap as Curt said. new bellows and new glycol and your ready for a great picture.

Athanasios

[gjaky]

Now I get both for 750$ We fired up the 7500, and got picture (at least menu), plus got a gift set of HD10(plain) and an ACON camera.
What is the difference between 7500 and 8500? As I know the 7500 is an european 8110. But the 8110 differs from 8500 only in the stigmator, right? It seem the CLM of the 7500 has a stigmator waveform daughterboard, so this is really a 8500?
The fact that the CLM dated to 1996 but the chassis label dated to 1995 means that the CLM had changed?

[Tim in Phoenix]

Hello

You can add zone stig to an 8110 (or 8000) with addition of a stigwave board, stig amp board, and swapping in the appropriate focus yokes and flare yokes. The CLM will detect the addition of the stigwave board and enable the adjustments in the service menu.


.

[David_Web]

My 7500 came with a 03p VIM and 6pole astig so hope for the best =)

[gjaky]

Now I performing the "usual" recapings and mods on the boards and I have a couple of questions.
The first is related to mechanicals: I have a hex-key set with sizes 2-2,5-3-4-5-6 mm. But I actually can't find any screw on the machine which would match these sizes, the most weird for me the little screws at the top of the LC chamber: they bigger than 2,5 but smaller than 3. So what size(scale) does marquee screws have?

Other question is board related: the Marquee 9000 has the stigmator amp integrated on the convergence board? (it has 6 connectors on the conv. board; 9" tubes have 5 connectors per tube while the 8"s have only 4)

The two machine came from the same place, and I think some boards are mixed up.
The CLM board which has stigmator waveform daughter board is dated to JAN 17 1996 (which means it is newer then either of my chassis)
I suppose it is not the original CLM, is this a newer 9000 CLM or an other? it is a 03-263336-03p issue:5 (U35:V3.3, U16:V2.4)
My other CLM is dated to AUG 17 1995 #:03-270336-03 (U35:V3.1 U16:V2.3) I think this belongs to the 7500.
The newer CLM better?

[Tim in Phoenix]

[draganm]

[gjaky]

What is so wrong with the original 9000l boards? I mean if it is recapped and looked over well it could perform also well. I want both machine to work, the electronics of 7500 are way much better? The Marquee primer says the 9000 and 9500 performs similarly.

I have an other question: I have a spare set of HD6C-ML color filtered lens is it worth get an adapter to change the HD8s on the 7500?

[Nashou66]

Yes the electronics on the 7500 are better. On the 9000 and 8000 there were many many service bulletins that had to be done, it got to the point they needed to redesign many of the boards. The 7500(8110) has the newer designed boards. I would take the 9 inch tubes and
put them into the 7500 chassis, also take the VNB's(neck boards) from the 7500 tubs and put them on the 9 inch tubes. Also the focus coils so you can get electronic astig if they have the extra coils.

Athanasios