Mata Hari -17 MPU with issues

MC35

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So Mata Hari has been working great for quite a while. I even had it at the Midwest Gaming Classic and it must have had close to 300 credits ran through it. Anyways, last night I was playing it and it stopped and it appeared to go into the self test mode. Now when it powers up it gets through the normal start up and then all the lights begin flashing as if it was in the first part of the test when you hit the test button.
Any thoughts?
MC
 
First, swap U10 and U11 PIA's, and see if anything improves, OR, if you eliminate the original issue and create a new one that shows up elsewhere. That would be the first step. Report back please!

Chris
 
The -49 power supply is a noted source of these types of problems. They are notorious for burning up the headers and / or connectors. Start by replacing the headers and connectors on the -49 power supply. The -49 power supply also has Bridge Rectifier issues due the BR's being too small. It is recommended that you beef up the BR's to 3502's. 3502's are a lot larger than the originals, but the fit with a little bit of creativity.

Most like you are dropping the +5vdc, and that is causing your issues.
Dok
 
The -49 power supply is a noted source of these types of problems. They are notorious for burning up the headers and / or connectors. Start by replacing the headers and connectors on the -49 power supply. The -49 power supply also has Bridge Rectifier issues due the BR's being too small. It is recommended that you beef up the BR's to 3502's. 3502's are a lot larger than the originals, but the fit with a little bit of creativity.

Most like you are dropping the +5vdc, and that is causing your issues.
Dok

Dropping 5VDC would pretty much render the MPU board activity dead, not send it off into test mode!! Not sure where you derive that conclusion. The power supply has nothing whatsoever to do with his issue, though rebuilding it is a reasonable recommendation for long term reliability.

Chris
 
Dropping 5VDC would pretty much render the MPU board activity dead, not send it off into test mode!! Not sure where you derive that conclusion. The power supply has nothing whatsoever to do with his issue, though rebuilding it is a reasonable recommendation for long term reliability.

Chris

Spike or drop the +5vdc randomly and see what happens.

Why you bullshitting, could be as simple as a cold solder joint on the test switch.:eek:
 
Spike or drop the +5vdc randomly and see what happens.

Why you bullshitting, could be as simple as a cold solder joint on the test switch.:eek:

Bullshitting? Have worked on hundreds of these games. Besides, the power supply does NOT provide 5V to the logic, it provides 12V, which is stepped down to 5V through the solenoid driver board. The only 5V that the power supply provides is 5.4VDC to the controlled lamps.

A "random spiking or drop" of the 5V could cause any number of maladies, not necessarily the game going into test mode....that's more of a logic issue. I'd like to see this reproduced live. The two are unrelated - sorry, arguing your point doesn't make it true.

Chris
 
Bullshitting? Have worked on hundreds of these games. Besides, the power supply does NOT provide 5V to the logic, it provides 12V, which is stepped down to 5V through the solenoid driver board. The only 5V that the power supply provides is 5.4VDC to the controlled lamps.

A "random spiking or drop" of the 5V could cause any number of maladies, not necessarily the game going into test mode....that's more of a logic issue. I'd like to see this reproduced live. The two are unrelated - sorry, arguing your point doesn't make it true.

Chris

Lighten up Brother, I never questioned how many games you have repaired.

I have seen this first hand working on a Paragon, but alas I did not capture it on video for the masses to follow. Thus I now have no tangible proof, so I will stop arguing my point.

Now instead of ragging on me, how about helping this person get their game back up and running.

And just as a side note: If "You" personally have not stuck your hands inside this persons game, in most cases "We" are just guessing.
 
I have seen cases where the coin door harness was scraping against the sharp edges of the cashbox. The wires eventually got the insulation cut through and was intermittently shorting the test switch wire.
 
Lighten up Brother, I never questioned how many games you have repaired.

I have seen this first hand working on a Paragon, but alas I did not capture it on video for the masses to follow. Thus I now have no tangible proof, so I will stop arguing my point.

Now instead of ragging on me, how about helping this person get their game back up and running.

And just as a side note: If "You" personally have not stuck your hands inside this persons game, in most cases "We" are just guessing.

Points taken, let's all move along, we ARE just guessing! Just hope these ideas help the guy out.

Chris
 
I have seen cases where the coin door harness was scraping against the sharp edges of the cashbox. The wires eventually got the insulation cut through and was intermittently shorting the test switch wire.

I am having this issue right now on my temp Xenon cab.
 
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