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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Wed Sep 05, 2012 6:25 pm Post subject: |
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power board 2 results:
CN6:
1. 3.3v
2. 0
3. Use this for ground when testing 1 through 8.
6. 65mv
7. 65mv
8. 65mv
9. 11v
10. Use this for ground when testing 9 and 11
11. -11v
CN7:
1. 66mv
2. 66mv
3. Use this for ground when testing 1 and 2.
5. 0
6. 0.54v
7. 0.57v
8. Use this for ground when testing 5 through 7.
also, I verified that cn6 pin 2 has the voltage I posted with leds on. And the front power led does not flash at any point.
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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Mon Sep 10, 2012 12:46 am Post subject: |
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as you can see, it doesn't have the required 3.3v on cn6 pin 2. Would I be able to just put a jumper across from pin 1 and have it work? Or might that risk damage?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon Sep 10, 2012 1:31 am Post subject: |
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Wow. I can't believe I missed that post. I know I've been busy but I thought I was keeping track here. I'll have to look at this tomorrow.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon Sep 10, 2012 1:32 am Post subject: |
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| Jakeklem wrote: | | as you can see, it doesn't have the required 3.3v on cn6 pin 2. Would I be able to just put a jumper across from pin 1 and have it work? Or might that risk damage? |
All you changed was the power supply and not the main?
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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Mon Sep 10, 2012 5:44 am Post subject: |
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Haha no problem Mac. Yes that's correct, I only changed the power supply.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon Sep 10, 2012 1:15 pm Post subject: |
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That's odd. Yes you can jump pins 1 and 2 on CN6 to see if it powers up.
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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Mon Sep 10, 2012 7:41 pm Post subject: |
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Yes, that's exactly what I thought too! It's as if that particular main and power supply are paired together and the main knows when it's a different power board. hahaha. I'll jump it and see what happens.
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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Mon Sep 10, 2012 8:27 pm Post subject: |
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Well I tried jumping pin 1 and pin 2 and got absolutely nothing.... not even a relay click. Built in circuit protection I suppose. Any ideas what to do next?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon Sep 10, 2012 9:01 pm Post subject: |
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Did you check voltages on those connectors with those pins jumped? That's what we are looking for.
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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Tue Sep 11, 2012 8:29 am Post subject: |
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Ya, sorry forgot to post em. With the jumper in place ithey were both at
pin 1 was 3.3v as expected and pin 2 was a little lower around 3.2v
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue Sep 11, 2012 1:21 pm Post subject: |
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Ha, I meant all the other pins on CN6 and CN7.
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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Tue Sep 11, 2012 6:20 pm Post subject: |
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| Quote: | | Ha, I meant all the other pins on CN6 and CN7. |
haha I should have known 
CN6:
1. 3.3v
2. 3.29v
3. Use this for ground when testing 1 through 8.
6. 58mv
7. 0
8. 0
9. 156mv
10. Use this for ground when testing 9 and 11
11. 0
CN7:
1. 0
2. 59mv
3. Use this for ground when testing 1 and 2.
5. 0.9mv
6. 0.55v
7. 0.57v
8. Use this for ground when testing 5 through 7.
Last edited by Jakeklem on Tue Sep 11, 2012 6:26 pm; edited 1 time in total
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue Sep 11, 2012 6:26 pm Post subject: |
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| Jakeklem wrote: | | Quote: | | Ha, I meant all the other pins on CN6 and CN7. |
haha I should have known
CN6:
1. 3.3v
2. 0
3. Use this for ground when testing 1 through 8.
6. 65mv
7. 65mv
8. 65mv
9. 11v
10. Use this for ground when testing 9 and 11
11. -11v
CN7:
1. 66mv
2. 66mv
3. Use this for ground when testing 1 and 2.
5. 0
6. 0.54v
7. 0.57v
8. Use this for ground when testing 5 through 7. |
Why do you have CN6, pin 2 listed at zero. Don't you have this jumped?
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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Tue Sep 11, 2012 6:28 pm Post subject: |
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| macgyver655 wrote: | | Jakeklem wrote: | | Quote: | | Ha, I meant all the other pins on CN6 and CN7. |
haha I should have known
CN6:
1. 3.3v
2. 0
3. Use this for ground when testing 1 through 8.
6. 65mv
7. 65mv
8. 65mv
9. 11v
10. Use this for ground when testing 9 and 11
11. -11v
CN7:
1. 66mv
2. 66mv
3. Use this for ground when testing 1 and 2.
5. 0
6. 0.54v
7. 0.57v
8. Use this for ground when testing 5 through 7. |
Why do you have CN6, pin 2 listed at zero. Don't you have this jumped? |
disregard that post... I edited it to be correct
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue Sep 11, 2012 6:32 pm Post subject: |
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It appears to be not working. Plus I still don't like the fact tht the main does not send the pin 2 voltage.
Anyways, what do you want to do? Trouble shoot the P/S ?
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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Wed Sep 12, 2012 10:06 am Post subject: |
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You're the expert. so I'll follow your suggestions 
I have been thinking about what you said in an earlier post about repairing the original power board. I looked at it again and found visual damage to only the relay and transformer. Granted the pad on the board where they connect is now a hole in the board. But I would assume that I could solder a wire between them instead. Any thoughts on this? Is there more risk to other components than it's worth since I have the other boards to work with?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Sep 13, 2012 2:55 pm Post subject: |
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The board with the hole may have more damaged components then just having a hole. Of course it could of only been a bad solder joint that started to arc and then burned until it couldn't draw an arc any more. Or you could also have a bad lamp which causes an arc to ground when the circuit is open in which case fixing all your board problems may still need lamp replacement.
It would of been best if you had received good replacement boards in the first place.
At this point it may be easiest to try to repair any damaged connections from the burn hole board since at least that board seems to be turning on. Just DON'T try testing the lamp output connector or poking around with your fingers there while it is plugged in. High voltage there which is why it has the shock hazard mark.
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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Thu Sep 13, 2012 4:58 pm Post subject: |
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Ok, I'll try to fix the original power board. Yes, I've read about the high voltage that runs through the inverters to the lamps and I always do my best to respect electricity!
I came across a website a while back that showed how to test the lamp output from the inverter using car headlights. Haven't tried it though. Ever hear of that? I'll see if I can dig it up.
I'm keeping my fingers crossed in hopes that the lamp's aren't bad. Any idea where I could pick up new ones in case they are?
One more question. Would you recommend I take the relay and whatever else I may need from the board without the burn to use as replacement parts? Or just see if I can order new ones?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Sep 13, 2012 7:05 pm Post subject: |
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| Jakeklem wrote: |
I came across a website a while back that showed how to test the lamp output from the inverter using car headlights. Haven't tried it though. Ever hear of that? I'll see if I can dig it up. Never heard of it.
I'm keeping my fingers crossed in hopes that the lamp's aren't bad. Any idea where I could pick up new ones in case they are?
Yes, if needed.
One more question. Would you recommend I take the relay and whatever else I may need from the board without the burn to use as replacement parts? Or just see if I can order new ones? Use parts from the other board. Don't buy anything just yet. |
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Jakeklem
Joined: 18 Aug 2010
Posts: 45
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| Posted: Tue Sep 18, 2012 6:18 am Post subject: |
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So I soldered in the Relay atC700 and Transformer at T701 from the new board to the old one. I should also note in here that I used a thick, solid, rubber cased copper wire to bridge the hole between the new relay and transformer. I installed the old board with new parts and plugged in only CN6 and took these measurements:
CN6:
1. 3.3v
2. 32mv
3. Use this for ground when testing 1 through 8.
6. 12v
7. 12v
8. 12v
9. 12v
10. Use this for ground when testing 9 and 11
11. 12v
Those all looked fine to me. So I unplugged the set from the wall and also connected CN7. I plugged the set back in and after several second began hearing a sizzling sound coming from where I replaced the components. I immediately pulled the plug. I can repeat this result. At this point I'm assuming there is another bad component on this power board or my solder job wasn't up to par .
Your thoughts?
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