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Old 09-19-2009, 10:28 AM   #1
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Default F*** Up Circuit Board ....Help

Ok, so I am a dumb ****, now that's out of the way. I damaged my circuit board at the Q4 connection. It is beyond repair. I am hoping to trace where each leg goes and make the connections for the PWM idle valve circuit elsewhere. I had the board almost completed when I fucked it up. I checked the schematic for the board but I am not really up to speed reading electrical diagrams. I could use some guidance as to where I could make the connections now that the board is damaged. It is a MS I v3.0 board
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Old 09-19-2009, 01:04 PM   #2
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That sucks man.


(From abe's album)

Its Funny, we were working on the idle problem all day yesterday, so that circuit is fresh in my head.

The top of R19 goes to Q4's pin 2 on the board.
Pin 1 on Q4 goes to Ground, then Pin 3 Goes straight to Pin 30 on the DB9. If you want to, you can also install it on the right side thru-hole point on D8. Its a pass through.

Make sure you follow directions on installing the TIP120, youre going to need to pull up a 12V using a Diode. Its in the manual.
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Old 09-19-2009, 01:08 PM   #3
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Thanks, I was sick over this. Most of it due to my own impatience and stupidity. Time to move on and finish this thing.
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Old 09-19-2009, 01:51 PM   #4
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pearls

Last edited by WestfieldMX5; 09-20-2009 at 07:33 AM.
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Old 09-19-2009, 04:14 PM   #5
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[QUOTE=Marc D;456161]That sucks man.


(From abe's album)

The top of R19 goes to Q4's pin 2 on the board.

What is considered the "top" of r19 ? I assume it means when you are looking at the board, the db9 is on your left and the top is where the heat sink is located.
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Old 09-19-2009, 08:27 PM   #6
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The top of R19, yea, like if you were looking at the board normally. Its placed vertically, so the "top' portion of it.
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