- A working QIX boardset consisting of the Video Processor PCB, the ROM I/O PCB and the Data/Sound PCB.
- The 50pin ribbon cables that connect these 3 boards together.
- The metal mounting plate that holds all 3 boards.
- (preferably) the original wiring harness (not necessary, but it makes things MUCH easier!)
In case you DO have the original harness, I have included the wire
colors from the manual wiring diagram.
You will also need:
- 1 - 10uf capacitor
- 1 - 10K resistor
- 1 - diode (value not critical?)
- 1 - Jamma edge connector (and the Jamma connection chart from Spies)
- 1 - Hex inverter chip (RS#________)
- 1 - .01uf capacitor
I recommend that you read through the whole document BEFORE you start.
Do this with the board set in front of you, and identify the various
wires as you go. It will be easier if you group the wires based on their
destination. For example, get all the ground connections together and deal
with them as a unit. Do the same with +5v, MRST etc. Also, I have listed
all of the +5v, gnd, etc, but I found that it worked fine with only one
of each per board. (in other words, the video board shows 2 +5v pins and 4
ground pins. I only connected ONE +5v and ONE ground on this board to get
it running)
The mounting plate these boards are supposed to be attached to serves as a
ground connection. They should be screwed to this plate to ensure proper
operation.
Also, apparently the game won't run unless the 2 pins on J19 of the video
board are connected together. I gather that these are hooked up to a
switch that is closed when the coin door is closed, for normal operation.
***Special Note about operation****
The video board has (or had), a NiCad battery soldered to it. If it's still
there, get rid of it! If it hasn't leaked all over your board, it will!
It powers chips that hold the game settings. This can be replaced if you want,
but the board will run without it. I haven't tried replacing it, since the
board won't be in operation for long enough each time to completly charge it,
and it will lose charge (or leak) in storage.
As a result, when the game is powered up, instead of going to attract mode,
it detects a loss of battery power and goes to option select screens.
(specifically, the language select screen). To get out of this, pin #1 of
the ROM board (Adv. Test) needs to be grounded momentarily 4 times to advance
to play mode. I simply connected this wire to an unused switch (in this case
I used the Jamma Player #2 Fire switch). I hit this until I get to the attract
mode, at which time the game accepts coins and starts.
Before we get started, there are 2 connections that will require
some "special attention". These are detailed in Notes #1 and #2 below:
Note #1)
The first is the video sync connection. Qix uses separate vertical and
horizontal sync connections in the dedicated cabinet. To make it worse,
these are Positive sync. Jamma expects to see negative composite sync.
The wiring diagram that came with Qix shows separate Vert and Hor sync
connections only. The schematic shows a composite pin. This makes it a
little easier. Since this connection is positive composite, it will need
to be inverted. That's where the hex inverter comes in. Here are the
connections for the hex inverter:
