Firepower/sys 7 help needed

brypten

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Need some help here. What causes the sys 7 board to go into audit mode?

I have a system 7 board with firepower eproms. I am using a working driver board (well, it works when its in Black Knight). I am getting 4.5 volts or so at pin 22 of the 5101. I swapped in four 5101's, still the same.

Any help would be awesome...In the meantime I am going to burn some roms for black kinght and see if the board works in black knight...
 
When does it do this? Only when you first turn it on or other times?
If only when you first turn it on, it is usually a battery issue: dead or corroded holder
 
Do you have the correct flipper ROM that matches the Firepower ROM's in the board? If you turn the game on and then turn it off and back on quickly does it leave the audit mode?
 
If I turn it on and off quickly, it still stays in audit mode.

I believe I have the right flipper roms. I used the EPROMS for system 7 firepower off of the marvin repair site
 
You might have a bad RAM socket (assuming it's socketed).

At this point I would probably pull the board and go through it with the test EPROM. There is a RAM test:

http://www.pinrepair.com/sys37/index2.htm#leon


So I tested it with Leon's test Eprom....really weird....

The CPU led's blink once, and then the 7 segment display will count 1-9 and stop at 9. The 09 flashes on and off...

When I use the tester LED on the PIA's, I only get pulsing on a few of the outputs...

I re-flowed all solder to the 5101, no change
 
That's definitely a memory circuit issue... it's either the blocking diode, the battery holder, the batteries, or the 5101. The fact that you can't powercycle it into attract mode tells us it's most likely the 5101.

Try cycling through all of the adjustments, exit out of that, and see if it dumps you into attract mode. That's another way to test to see if the 5101 is any good at all.

Once you're done with that there are a bunch of mandatory tasks to perform on the sys7 boardset.
 
That's definitely a memory circuit issue... it's either the blocking diode, the battery holder, the batteries, or the 5101. The fact that you can't powercycle it into attract mode tells us it's most likely the 5101.

Try cycling through all of the adjustments, exit out of that, and see if it dumps you into attract mode. That's another way to test to see if the 5101 is any good at all.

Once you're done with that there are a bunch of mandatory tasks to perform on the sys7 boardset.

The voltage is correct at the RAM, so it can't be the blocking diode or the batteries. I have swapped in multiple 5101's, all form working boards. Turning it on and off quickly does not make it come out ot attract mode. Also when I push any of the buttons inside the coin door, nothing happens :(
 
The voltage is correct at the RAM, so it can't be the blocking diode or the batteries. I have swapped in multiple 5101's, all form working boards. Turning it on and off quickly does not make it come out ot attract mode. Also when I push any of the buttons inside the coin door, nothing happens :(


What does the test LED tell you when you press the reset button? I don't know Leon's test ROM but 9 is the coin door test. If your coin door buttons aren't responding, and the test rom is giving you the coin door failure code... check the wiring to the coin door buttons, yes? And check the buttons themselves, maybe one of them is shorted.

Wouldn't be the first time I've seen a broken wire to a coin door button locking up a machine on boot.
 
The voltage is correct at the RAM, so it can't be the blocking diode or the batteries. I have swapped in multiple 5101's, all form working boards. Turning it on and off quickly does not make it come out ot attract mode. Also when I push any of the buttons inside the coin door, nothing happens :(

You could still have a problem with one of the address, data or enable lines on the 5101. You could also have a problem with the addressing logic. If you suspect the 5101 you should take a look at the socket and traces.

If you're using the test eprom you might want to try it without the 5101 installed and see if it makes any difference in the output pins of the PIAs. If not you likely have a problem going beyond the 5101. Could be a bad trace, logic IC, CPU or a bunch of other things.
 
Replace every socket while you're doing it. They all need to go. I just finished doing this on a sys7 board myself. Keep in mind that every time you cycle that 40pin connector, if you haven't replaced it, you increase the odds of pain in the ass errors. In your shoes I'd do both sides of the 40pin while the board is already out. It always needs replacing.
 
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