MONITOR REPAIR

I was going to pull my bench monitor out to the garage, and wire it up to an isolation transformer, then get a video extension cable and hook it up to Tron...but that all sounded like waaaay too much work.

Since this was an Electrohome G07 monitor in the game, and I have several working chasis for G07s in parts, I figured it would just be easier to replace the chasis and take my chances that's what the problem was.

Here is the G07 with the original chasis out.



I took some time to go over the tube and wiring with a soft paintbrush to get all the dust and nicotine off everything.  (I'm sure this has never been cleaned before, it was disgusting!)

Here is the monitor with the new chasis in!



The moment of truth.....





I had to play around with the adjustments quite a bit to get the right size, shape, and brightness.  I also had to turn up the "blue" cutoff a lot, to be able to see the grid in lightcycles, and gridbugs.

Ok... here's some beauty shots.... (Or as OTTOgd calls it...arcade restro porn).

PROBLEMS LEFT TO SOLVE

1) Since I added the new Power Supply in, the volume is really SUPER LOUD!  The volume control inside the coin door no longer works.

Does anyone know if there's a volume pot on the PCB?

2)  Player 1 start doesn't work.  I can start a 2 player game.

3)  The right coin switch doesn't work.  (I'm wondering if problems 2 and 3 are related somehow).

I have a set of SCSI interconnect cables on order, and they should be here this week or next.  Maybe that will fix some of these strange problems?

Fantastic Job !

What you need now is the Tron Free play eprom.

As a token of appreciation for your restoration efforts,
allow me to send one over...



PM me your mailing address...

Cheers,
Steph

Damn that looks sweet

Quoted from Steph

Fantastic Job !

What you need now is the Tron Free play eprom.

As a token of appreciation for your restoration efforts,
allow me to send one over...

That's an extremely generous offer, which I'll take you up on!

I'm always amazed at these little gems you find.  I still love the Joust pause EPROM!  

Thanks very much!

I've gotten several messages telling me to try the volume control pot in the coin door.

I need to give you all some more information.

The linear power supply has 4 connectors.  When I added the switching power supply and adapter, it only uses 3 of the 4 connectors...the other one is just disconnected.

I think that the volume pot in the coin door is somehow routed through this 4th connector.

When I was still running the linear board, I was able to use the volume pot in the coin door to lower the volume level, so I know it was working properly.

Now, it just seems "disconnected" rather than "broken".

I'm thinking there has to be a volume pot on the circuit board as well somewhere.  The manual alludes to this, but I only have the "preliminary" manual, not the full production manual.

Does anyone have more experience with this than I do?

DISASSEMBLY

The monitor shroud didn't want to come out.



Have you ever seen dirtier monitor glass?

Quoted from Bish

I'm thinking there has to be a volume pot on the circuit board as well somewhere.  The manual alludes to this, but I only have the "preliminary" manual, not the full production manual.

Does anyone have more experience with this than I do?

Bish,

I'll get off my lazy a** and dig out my complete manual set and see what I can find for you, but I don't recall the PCB stack having any sort of volume control...

Any response back from Arcadeshop on the volume issue?

D

Arcadeshop said they'd never heard of that problem before.

I think my next step is to repin all the connectors going to the PCB.  There's a lot of random issues cropping up.

- Powers up with no video but sound
- Powers up with no sound but video
- Doesn't initialize the PCB
- Powers up, but some controls don't work.

I've replaced the interconnect cables, but it hasn't seemed to fix anything.

Nice work!