Picked up Arachnid machine . . has a small problem

[sewerrat]

I just completed my quest to find a machine
Picked up an Arachnid 6000 series machine
One problem I can't seem to trace:
None of the lights work (coin door, select/enter, player change, and the lights for the "wait to throw, "ok to throw).
The target lamps work and the monitor works.
Any ideas?  I've ruled out bulbs as I've changed in working bulbs.

Thanks

[Kevin Mullins]

Have you checked for any fuses ?
Could possibly be that they are all on the same power cicuit.

[Angry_Radish]

Fuse, bad PS output or a bad ground perhaps?

[sewerrat]

Fuse, bad PS output or a bad ground perhaps?

Not a fuse, the machine has 3 and all are good.
Power supply is powering everything else, so I don't know what else to check, but it appears to be good.
I can only find 1 ground for the PS and it is good.

The schematics are at http://www.arachnidinc.com/support/6000/6000sche.pdf
but I don't know how to read schematics, so it doesn't help me 

[Ken Layton]

There's also more manuals/information for these machines at http://arcarc.xmission.com under pdf darts.

All the 12 volt lamps get their power from the small standup 12 volt regulator transistor on the power supply board. It's the one next to the DC output connector on the power supply board. Sometimes it develops bad solder joints from the heat sink being flexed all the time. Sometimes a leg of the transistor breaks off at the body. Sometimes there's bad solder joints on the DC output connector.

[sewerrat]

There's also more manuals/information for these machines at http://arcarc.xmission.com under pdf darts.

All the 12 volt lamps get their power from the small standup 12 volt regulator transistor on the power supply board. It's the one next to the DC output connector on the power supply board. Sometimes it develops bad solder joints from the heat sink being flexed all the time. Sometimes a leg of the transistor breaks off at the body. Sometimes there's bad solder joints on the DC output connector.

Thanks Ken
I assume you're talking about the LM340-12, correct?  It does look a little corroded.  Do you think I need to replace it or just try and re-solder it?  Can I get this at Radio Shack or will it have to be ordered from Happs?  My soldering skills aren't so hot, but I can give it a try.

[Ken Layton]

Yes. Careful resoldering may fix it. If not you can buy a replacement at Radio Shack:

# 276-1771 Voltage regulator, 7812 (same as LM340-12) $2.00

If you have an electronics parts jobber (in the Yellow Pages under "Electronic Equipment & Supplies") that sells NTE brand components, you can use an NTE 966 as a replacement.

[sewerrat]

Yes. Careful resoldering may fix it. If not you can buy a replacement at Radio Shack:

# 276-1771 Voltage regulator, 7812 (same as LM340-12) $2.00

If you have an electronics parts jobber (in the Yellow Pages under "Electronic Equipment & Supplies") that sells NTE brand components, you can use an NTE 966 as a replacement.

Thanks Ken!  Got the Radio Shack one, desoldered the old one, soldered on the new one . .and Whammo, I got lights.
However, now the monitor doesn't work (an external monitor does) and all the lights stay on all the time (ie, the "don't throw darts" and "throw darts" lights are both on constantly.

Thought 

[Ken Layton]

Did you solder the new regulator in exactly the same direction/orientation as the old one? Did you transfer the heatsink from the old one to the new one?

[sewerrat]

Heatsink = yes
Direction/Orientation= I believe so.  The chip only screws onto the heatsink one way due to the depth of the chip and the heatsink is in the same position.

Can anybody R&R this power supply or do you know a source to buy one?  I'm think a new PS would be less headaches.

[Q*Bert_OP]

Did the old voltage regulator have a piece of mica behind it?

[sewerrat]

Did the old voltage regulator have a piece of mica behind it?

No.  Just a steel/aluminum bar that allows it to be attached to the heatsink.

[Havok]

I just recently picked up a 6000 series myself - I was lucky enough to get the manual tucked away under the cash box. Let me know if you need a scan of anything...

[Ken Layton]

I just recently picked up a 6000 series myself - I was lucky enough to get the manual tucked away under the cash box. Let me know if you need a scan of anything...

The manuals and schematics are already available at both the manufacturer www.arachnidinc.com and at http://arcarc.xmission.com