Carnetix Wiring Help Needed!

**Bugbyte** · 08-31-2010, 11:08 PM

JP1 - Connect to external contact closure, Deadman timer enabled, hibernate, not used, 15 minute delay before shutdown sequence. You should jumper the hibernate pins to enable sleep since the Mac does not hibernate.

JP2 - Appears to set the secondary voltage to 12 volts.

JP3 - Can't see it but you don't need ACPI for the Mac anyway.

JP4 - Looks like it makes the secondary output come on 3 seconds after ignition and shut off when ignition is shut off.

JP5 - Both jumpers set to 12 volts.

JP6 - Appears to set primary voltage to 19 volts. You need to remove this jumper completely to set the output to 18 volts, which is what the Mini needs.

The red and black wires in your bottom photo can PROBABLY go to a USB powered hub. Measure the voltage with a multimeter first before hooking them up. If you don't use them, make sure you secure them so they don't short out. Some heat shrink tubing from Radio Shack will do that nicely.

**JETT86** · 09-01-2010, 06:58 AM

Thanks for the explanations!!! That was very helpful.

When looking at the carnetix, should I position it just like the manual which for example, JP1 (on the left side) 1-2 would be the furthest pins to the left 3-4 would be next to the right and so forth?

If so, I believe my JP5 is set to 5V.

**Bugbyte** · 09-01-2010, 07:32 AM

Originally Posted by JETT86

Thanks for the explanations!!! That was very helpful.

When looking at the carnetix, should I position it just like the manual which for example, JP1 (on the left side) 1-2 would be the furthest pins to the left 3-4 would be next to the right and so forth?

If so, I believe my JP5 is set to 5V.

I believe you are right. Position the P1900 as it is shown in the diagram in the manual (with the big circular donut-shaped toroid on the upper left. If the rightmost pins (5-6) are open, the secondary voltage is set to 5 volts. You'll want to change that to 12 volts by moving the jumpers to the right, leaving pins 1-2 open.

In conjunction with that, the manual says you MUST set pins on jp2 to the 12 volt setting, which is the jumper on the upper two pins with the lower pin open. It's fuzzy in your second picture, so I can't see what it is set to. In general, the label 'jp2' is usually on the board nearby the jumper.

If the jumpers are mismatched (jp2 is currently set to 12v and jp5 is set to 5v), I don't know if that is the problem or not, but it certainly needs to be corrected.

**JETT86** · 09-01-2010, 07:43 AM

Here is how I arranged them when positioning the carnetix the same as the manual.

JP1: 1-2: no jumper
3-4: Deadman enabled
5-6: Standby (sleep)
7-8: Open
9-10: 6 sec shutdown delay

JP2: 12V

JP3: Don't need

JP4: Follow DLYON

JP5: 12V

JP6: 18V (all open)

This sound correct?

**JETT86** · 09-01-2010, 09:57 AM

I have another question regarding the wiring for the screen.

The plug going to the screen has 2 layers of wiring, outer and inner. Previously, (if I remember correctly) the outer was connected to black and the inner was connected to red.

Since I will be connecting this plug to the brown secondary wire, should i add another ground wire as well or just connect both inner and outer wires to the brown wire?

**Machinehead** · 09-01-2010, 10:27 AM

Originally Posted by JETT86

I have another question regarding the wiring for the screen.

The plug going to the screen has 2 layers of wiring, outer and inner. Previously, (if I remember correctly) the outer was connected to black and the inner was connected to red.

Since I will be connecting this plug to the brown secondary wire, should i add another ground wire as well or just connect both inner and outer wires to the brown wire?

DC power requires a positive and negative connection. So Brown (+12v) connected to the inner wire, black (- or ground) to the outer. It won't work otherwise.

**Bugbyte** · 09-01-2010, 11:49 AM

Sounds like you're set. Good luck!

**JETT86** · 09-01-2010, 02:39 PM

Originally Posted by Machinehead

DC power requires a positive and negative connection. So Brown (+12v) connected to the inner wire, black (- or ground) to the outer. It won't work otherwise.

Thanks for clarifying!

Originally Posted by Bugbyte

Sounds like you're set. Good luck!

Awesome! Thanks for all the help guys!

One last thing, since I do not have the 2 connectors and the 2 wires on P5V board connected to anything... its safe to say I can remove it right?.. Unless I completely missed a post stating that I need to connect those wires to something.

**JETT86** · 09-01-2010, 10:10 PM

I hooked everything up in the car... it's still doing the same thing. Carnetix starts, screen boots up, mac mini does not unless I press the button. ?????

The only 2 wires I do not have connected are the 2 blue wires. The carnetix shuts down after about a minute of removing the key.

Is this a jumper issue? Do I need to change things around? Could this be the wiring going to the mac?

I'm lost