| Author |
Message |
bigpapi007
Joined: 24 Sep 2014
Posts: 27
Location: United States
|
| Posted: Fri Nov 28, 2014 1:32 am Post subject: electrohome marquee 8500 |
|
|
|
I have been swapping out power supplies, and now put one in and the c (on the right) flashes when I try to get a picture. Projector powers up, but c flashes. Any suggestions?
|
|
| Back to top |
|
 |
Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
|
| Posted: Fri Nov 28, 2014 2:11 am Post subject: |
|
|
Hello
It should only flash when you are pressing a keypad button
|
|
| Back to top |
|
|
bigpapi007
Joined: 24 Sep 2014
Posts: 27
Location: United States
|
| Posted: Fri Nov 28, 2014 5:01 am Post subject: |
|
|
|
I'm not getting a picture;
|
|
| Back to top |
|
|
bigpapi007
Joined: 24 Sep 2014
Posts: 27
Location: United States
|
| Posted: Fri Nov 28, 2014 5:05 am Post subject: |
|
|
|
Why no picture; no other diagnostic lights;
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
|
| Back to top |
|
|
bigpapi007
Joined: 24 Sep 2014
Posts: 27
Location: United States
|
| Posted: Fri Nov 28, 2014 8:19 pm Post subject: |
|
|
|
I reseated the HDM and same; powers up, makes all the noises yet no picture even on utilities; does it have something to do with the HV power supply which changed out several times?
|
|
| Back to top |
|
|
bigpapi007
Joined: 24 Sep 2014
Posts: 27
Location: United States
|
| Posted: Fri Nov 28, 2014 8:20 pm Post subject: |
|
|
|
I reseated the HDM and same; powers up, makes all the noises yet no picture even on utilities; does it have something to do with the HV power supply which changed out several times?
|
|
| Back to top |
|
|
Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
|
| Posted: Fri Nov 28, 2014 9:27 pm Post subject: |
|
|
OK, THAT'S a problem. unless you're REALLY unlucky, you should NEVER have to change out 'several' HVPS!
I had a customer once that had an 8500 that ate HVPS on a regular basis. I told him to scrap the set, as it was impossible to figure out why he went through HVPS every year. You maybe change a HVPS once in the life of a set, twice with bad luck.
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
|
| Back to top |
|
|
bigpapi007
Joined: 24 Sep 2014
Posts: 27
Location: United States
|
| Posted: Sat Nov 29, 2014 1:31 am Post subject: |
|
|
|
I was swapping out hv to make sure those I was selling worked.
|
|
| Back to top |
|
|
draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
|
| Posted: Tue Dec 02, 2014 5:54 pm Post subject: |
|
|
| bigpapi007 wrote: | | I reseated the HDM and same; powers up, makes all the noises yet no picture even on utilities; does it have something to do with the HV power supply which changed out several times? |
if you hear "the crackle", then the HV is coming up, simple as that. There could still be a problem on the G2 section, but unlikely all 3 tubes at once.
If your not getting anything to come up with HV on then there's an issue on the control module. At this point, it's critical to pull this board, and with a proper chip-puller, pull and clean the chips with De-oxit. On really high hour sets, replacing the primary de-coupling caps on the 5 and 15 volt rails is also a really good idea as there are some ripples on these rails which eventually kill the tant's. Typically though, it's oxidation on the DPB board, chip U7, and the pins connecting this board to the CLM
|
|
| Back to top |
|
|
|
|
