| Author |
Message |
Luuk neele
Joined: 04 Mar 2015
Posts: 186
Location: Wijk bij duurstede, the Netherlands.
|
| Posted: Thu Mar 19, 2015 11:34 pm Post subject: |
|
|
wow, so instead of a -15v regulator they put a -5v regulator in there? LMAO yes, ill have to order it.
i can use a l7915cv?
|
|
| Back to top |
|
 |
mac
Joined: 07 Nov 2012
Posts: 143
|
| Posted: Thu Mar 19, 2015 11:52 pm Post subject: |
|
|
|
Hmmm, according to the datasheet, no, it wont work. Problem with pin locations. That is surprising. LM7915CT should be correct.
|
|
| Back to top |
|
|
Luuk neele
Joined: 04 Mar 2015
Posts: 186
Location: Wijk bij duurstede, the Netherlands.
|
| Posted: Fri Mar 20, 2015 12:02 am Post subject: |
|
|
anything else we can test or is this the culprit on this board? because this is a damn shame if its just this, the part costs 30 cents, the costs to get it here are 4 euros lol  rather order some more parts.
|
|
| Back to top |
|
|
mac
Joined: 07 Nov 2012
Posts: 143
|
| Posted: Fri Mar 20, 2015 12:08 am Post subject: |
|
|
|
Well the only other supply we did not test on that vert board is the -9v. But that requires soldering a wire on the board cause there is no TP. It is up to you.
|
|
| Back to top |
|
|
mac
Joined: 07 Nov 2012
Posts: 143
|
| Posted: Fri Mar 20, 2015 12:11 am Post subject: |
|
|
|
Oh, we should also check for a short on that -15v line. You have to remove ic21. Then set DMM on diode scale and measure across the solder points on the board where pins 1 and 3 were. Test both ways and give me the 2 readings.
|
|
| Back to top |
|
|
Luuk neele
Joined: 04 Mar 2015
Posts: 186
Location: Wijk bij duurstede, the Netherlands.
|
| Posted: Fri Mar 20, 2015 12:11 am Post subject: |
|
|
|
soldering a wire is no problem. better to test it or dop you think its unlikely? i have no short on the -9v line though.
|
|
| Back to top |
|
|
mac
Joined: 07 Nov 2012
Posts: 143
|
| Posted: Fri Mar 20, 2015 12:13 am Post subject: |
|
|
| mac wrote: | | Oh, we should also check for a short on that -15v line. You have to remove ic21. Then set DMM on diode scale and measure across the solder points on the board where pins 1 and 3 were. Test both ways and give me the 2 readings. |
|
|
| Back to top |
|
|
Luuk neele
Joined: 04 Mar 2015
Posts: 186
Location: Wijk bij duurstede, the Netherlands.
|
| Posted: Fri Mar 20, 2015 12:28 am Post subject: |
|
|
1+3 = .550
3+1 = 1
|
|
| Back to top |
|
|
mac
Joined: 07 Nov 2012
Posts: 143
|
| Posted: Fri Mar 20, 2015 12:41 am Post subject: |
|
|
|
Might as well check 1+2. 2+1, 3+2, 2+3
|
|
| Back to top |
|
|
Luuk neele
Joined: 04 Mar 2015
Posts: 186
Location: Wijk bij duurstede, the Netherlands.
|
| Posted: Fri Mar 20, 2015 12:47 am Post subject: |
|
|
1+2= 1.418
2+1 = 1
2+3 = .601
3+2= 1
|
|
| Back to top |
|
|
mac
Joined: 07 Nov 2012
Posts: 143
|
| Posted: Fri Mar 20, 2015 12:55 am Post subject: |
|
|
|
That all looks fine. If you want to solder that wire on and check the -9v, look for C73 on the vert board. Solder a wire to the NEG. side of it. Then install it, DMM on DC voltage, neg probe on chassis, start it up and check for proper voltage on wire. Let me know what you get.
|
|
| Back to top |
|
|
Luuk neele
Joined: 04 Mar 2015
Posts: 186
Location: Wijk bij duurstede, the Netherlands.
|
| Posted: Fri Mar 20, 2015 1:08 am Post subject: |
|
|
cannot find c73, lets leave it for now as i have found no errors in the -9v line as of yet.
should i order and replace that regulator? then test again?
|
|
| Back to top |
|
|
mac
Joined: 07 Nov 2012
Posts: 143
|
| Posted: Fri Mar 20, 2015 1:16 am Post subject: |
|
|
|
No problem. Yes, order part and replace. After startup do a 30 code again. no sweep and G2 low should be gone. Clamp will probably still be there. If all still ok then do a "1" "test" and see if you get grid.
|
|
| Back to top |
|
|
Luuk neele
Joined: 04 Mar 2015
Posts: 186
Location: Wijk bij duurstede, the Netherlands.
|
| Posted: Tue Mar 24, 2015 7:00 pm Post subject: |
|
|
| mac wrote: | | No problem. Yes, order part and replace. After startup do a 30 code again. no sweep and G2 low should be gone. Clamp will probably still be there. If all still ok then do a "1" "test" and see if you get grid. |
Guess what?
I got me a grid on all three tubes!
Now: what is a normal contrast setting? If I set it to 50 the room needs to be completely dark.
All tubes are set up to make maximum use of phosphor area.
I'll order a vga to bnc cable next to test video input.
Can't move this beast on my own and it's in a room which is unusable for testing as I don't have enough space.
Will have to move it to the living room.
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
|
| Back to top |
|
|
Luuk neele
Joined: 04 Mar 2015
Posts: 186
Location: Wijk bij duurstede, the Netherlands.
|
| Posted: Tue Mar 24, 2015 7:57 pm Post subject: |
|
|
Nashou,
What do you run your ampro at in terms of brightness and contrast.
I just tested the astig, it's as perfect as it can be.
It really seems this pj was used for 4 days according to the counter.
Lol
What I do wonder is which moron decided that repairing the vert board with a - 5v regulator in stead of a - 15v one was a good idea.
That is what probably destroyed the other components I replaced.
I ended up replacing:
1 tantal elc
1 - 12v reg
2 75k ohm resistors
1 - 15v reg
Last edited by Luuk neele on Tue Mar 24, 2015 8:02 pm; edited 1 time in total
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
| Posted: Tue Mar 24, 2015 8:00 pm Post subject: |
|
|
It depends on the room setting, dark, bright, ambient. But i never set mine up 
I will one day. But its best to set it up so you just barely see the raster light up
around the Grid then back it off till its not there.
that is just for now, later you will need to use patterns and adjust the G2 in a similar fashion the go back to brightness.
Nashou
_________________
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 |
|
|
Luuk neele
Joined: 04 Mar 2015
Posts: 186
Location: Wijk bij duurstede, the Netherlands.
|
| Posted: Tue Mar 24, 2015 8:04 pm Post subject: |
|
|
|
Is there a guide about this? I'll need to read more.
|
|
| Back to top |
|
|
mac
Joined: 07 Nov 2012
Posts: 143
|
| Posted: Tue Mar 24, 2015 9:45 pm Post subject: |
|
|
On the remote, press and hold each of the 3 color buttons until each one says "off".
Look into each lens and turn up corresponding G2 control until you just see a full raster then back it off until it just disappears. Do all 3 and let me know how you made out.
Set main contrast at 80 and main brightness at 50.
|
|
| Back to top |
|
|
Luuk neele
Joined: 04 Mar 2015
Posts: 186
Location: Wijk bij duurstede, the Netherlands.
|
| Posted: Tue Mar 24, 2015 10:03 pm Post subject: |
|
|
Where's the g2?
its on the neck card? the red dial in the blue socket?
|
|
| Back to top |
|
|
|
|
