| Author |
Message |
r.bauer
Joined: 08 Apr 2006
Posts: 280
Location: The Netherlands
|
| Posted: Thu Dec 20, 2012 10:58 am Post subject: marquee in lab setup won't power off! |
|
|
Hi,
I am assisting someone who has a marquee in a very cool lab setup. I know Barco's all the way inside out, but not the marquee. Thing is, it won't power off using the remote ?!?
The HV comes up, but doesn't come up all the way and immediately goes down again.
During power down, the C led flashes, not other leds on the status board are lit.
I am starting to dig into the projector right now, but any help on this is appreciated.
|
|
| Back to top |
|
 |
barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
|
| Posted: Thu Dec 20, 2012 11:35 am Post subject: |
|
|
Hi,
in order to power on/off You'll need to keep pressed the "Power" button on the internal/external remote for some seconds.
Check the LEDs on the LVPS. They'll indicate if a supply voltage is missing.
And check the error LEDs on the CLM.
Please report back on Your findings.
Regards,
barclay66
P.S.: The LVPS picture is from the AVS Forum (member: Energeezer), the back side picture is from here (member: Nashou66)
| Description: |
|
| Filesize: |
111.32 KB |
| Viewed: |
4504 Time(s) |
|
| Description: |
|
| Filesize: |
116.61 KB |
| Viewed: |
4503 Time(s) |
|
|
|
| Back to top |
|
|
Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
|
| Posted: Thu Dec 20, 2012 2:06 pm Post subject: |
|
|
Hey, that's MY backside picture! (wait, that sounded wrong!  )
|
|
| Back to top |
|
|
barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
|
| Posted: Thu Dec 20, 2012 2:13 pm Post subject: |
|
|
| Curt Palme wrote: | | Hey, that's MY backside picture! (wait, that sounded wrong! ) |
ROFL
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
|
| Back to top |
|
|
r.bauer
Joined: 08 Apr 2006
Posts: 280
Location: The Netherlands
|
| Posted: Thu Dec 20, 2012 8:07 pm Post subject: |
|
|
Thanks for the replies, it is already up and running again.
| Curt Palme wrote: | | Hey, that's MY backside picture! (wait, that sounded wrong! ) |
Well, it was your projector to start with 
I reseated all the boards and pressed all IC in their sockets and it worked just fine. Some small other fixes, and they are good to go again.
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
|
| Back to top |
|
|
r.bauer
Joined: 08 Apr 2006
Posts: 280
Location: The Netherlands
|
| Posted: Thu Dec 20, 2012 8:37 pm Post subject: |
|
|
I have an additional question.
They are using very sensitive sensors within 3-4ft of the projector, and as soon as they power-up the projector they see a lot of (random) noise on the sensor.
Anyone has got an idea what part or circuit inside the projector could cause that? First thing I have asked if there was any relation to scan-frequency, because of the large HV-deflection voltage and current applied, but they said no, random noise.
So, any suggestions on the source?
I have knowledge on what to do when EMI/RFI is an issue, but knowing where it originates from helps a lot. Next we can think of ways to stop the interference of the projector into the sensor.
|
|
| Back to top |
|
|
gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
|
|
| Back to top |
|
|
r.bauer
Joined: 08 Apr 2006
Posts: 280
Location: The Netherlands
|
| Posted: Thu Dec 20, 2012 9:02 pm Post subject: |
|
|
The lab has good grounding facilities. Everything is grounded, the projector has a special lead from the chassis in a direct connection to the ground in the room as everything in the lab, besides the grounded power cord.
Power ground is 'good' so to say, so I don't think that will be an issue.
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
| Posted: Thu Dec 20, 2012 9:37 pm Post subject: |
|
|
I'd say the HDM and its coils. If you take a scope and ground one to the PJ and then just get with in a few inches of the coil you'll see the sweep pattern of the coils. Maybe try adding some copper flashing to the HDM cage, and to the cover of the marquee but cut holes for the exhaust of the belly fans through the HDM and FCM/FGM.
Also make sure the lead X-Ray shields are in place.
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
|
|
| Back to top |
|
|
CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
|
| Posted: Thu Dec 20, 2012 10:20 pm Post subject: |
|
|
Could they be seeing x-ray?
craigr
_________________
JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
Light Illusion ColourSpace XPT Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
OMARDRIS JVC Software Patch to use K10-A and Jeti with JVC OEM AutoCal Software!
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Authorized Dealer for Lumagen & just about everything worth buying 
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
|
|
| Back to top |
|
|
gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
|
| Posted: Thu Dec 20, 2012 10:40 pm Post subject: |
|
|
| CIR Engineering wrote: | Could they be seeing x-ray?
craigr |
The generated x-rays are proportional to the light output, not the fact of powerin up, I think.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
|
|
| Back to top |
|
|
barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
|
| Posted: Thu Dec 20, 2012 11:03 pm Post subject: |
|
|
| r.bauer wrote: | I have an additional question.
They are using very sensitive sensors within 3-4ft of the projector, and as soon as they power-up the projector they see a lot of (random) noise on the sensor. |
Hi,
I think it will be a combination of different sources:
- Horizontal deflection (as mentioned above)
- Vertical deflection
- Focus circuitry
- Convergence circuitry
- Stigmator circuitry
- LVPS
- HVPS
All of those produce electromagnetic fields with different frequencies (all of them put energy into coils) and combined they might look like random noise.
Holding the probe near the corresponding boards might show the components in detail...
Regards,
barclay66
|
|
| Back to top |
|
|
r.bauer
Joined: 08 Apr 2006
Posts: 280
Location: The Netherlands
|
| Posted: Fri Dec 21, 2012 5:33 pm Post subject: |
|
|
| barclay66 wrote: | | r.bauer wrote: | I have an additional question.
They are using very sensitive sensors within 3-4ft of the projector, and as soon as they power-up the projector they see a lot of (random) noise on the sensor. |
Holding the probe near the corresponding boards might show the components in detail... |
That is a good suggestion.
On the subject of noise, do X-rays gerate EMI/RFI? I don't know. I searched a bit, but could not find anything.
Just to make sure this has to remain on the to-do list.
|
|
| Back to top |
|
|
jantje112
Joined: 17 Jul 2006
Posts: 328
|
| Posted: Tue Dec 25, 2012 6:47 pm Post subject: |
|
|
|
Maybe I stupid suggestion, but they use these magnets in PSU's and power cables. Maybe that helps some?
|
|
| Back to top |
|
|
stridsvognen
Guest
|
| Posted: Tue Dec 25, 2012 8:11 pm Post subject: |
|
|
| r.bauer wrote: | The lab has good grounding facilities. Everything is grounded, the projector has a special lead from the chassis in a direct connection to the ground in the room as everything in the lab, besides the grounded power cord.
Power ground is 'good' so to say, so I don't think that will be an issue. |
Ground loop sounds possible when having multiple groundings.. And is the signal source grounded to.?
And is its all running on the same phase..
|
|
| Back to top |
|
|
|
|
