My first post on the forum - glad I found a site that is dedicated to the restoration of Pins...
I'm hoping that someone can help me diagnose a problem(s) that I'm having with my Cleopatra SS Pin. I've been a pinball lover ever since my dad introduced them to me in the early 70's, feeling a bit old now... something about a pin just makes me feel comfortable, anyway.
I'm a bit green when it comes to diagnosing problems with electronics but I'm learning more than I ever thought I would. I'm handy with a soldering iron and extremely mechanical in nature. I came across a site (pinrepair.com) that had some diagnostics for checking System 1 problems so I printed off some of the instructions and I was able to follow without much problem however I wasn't able to repair my issue(s).
The problem(s) I'm having is that the out hole doesn't recognize or kick the ball out of the hole while playing a game and also the display's are showing garbage in attract mode as well as the ball count display is garbled but the credits are OK, the displays all test fine in test mode
I pulled the control board and tested all the transistors (http://www.pinrepair.com/sys1/index.htm#testtrans), none were bad and all were within range so I reinstalled the board. I did the ground repair that was spoken about and common with System 1 games and also checked the voltages at the power supply for 42 and 60 volts.
I also tested the 7417 chips as described below on the CPU board and they tested fine - all the coils fired as expected.
++++++++++++++++++++++++++++++++++++
7417 chip Test (CPU board locations Z6,Z7).
The 7417 chips at Z6 (located just above connector J5) and Z7 (to the right of Z6) can also be used to test the connection from the CPU board to the driver board, and to test the transistors at Q25-Q32 (all the CPU controlled coils).
With the game on, attach an alligator clip to +5 volts (the positive/upper lead of capacitor C16 on the CPU board). Then touch the Z6 pins 1-6 and pins 8-13 (note pin 7=gnd and pin 14=+5). Each pair of pins (for example Z6 pins 1,2) should fire its associated coil when attached to +5 volts. The same thing can be repeated for Z7 pins 1-4 (only). Refer to the above chart to see which Z6/Z7 pins control which driver board transistor/coil. If only one of the two pairs of pins activates the coil, the Z6 or Z7 chip is bad. If neither pin activates a coil, check the CPU to driver board connector and the driver board transistor.
++++++++++++++++++++++++++++++++++++
I think I have 2 problems going on - 1 with the displays and the other with the out hole.
Hopefully someone can give me a hand with this..
Merry Christmas!
I'm hoping that someone can help me diagnose a problem(s) that I'm having with my Cleopatra SS Pin. I've been a pinball lover ever since my dad introduced them to me in the early 70's, feeling a bit old now... something about a pin just makes me feel comfortable, anyway.
I'm a bit green when it comes to diagnosing problems with electronics but I'm learning more than I ever thought I would. I'm handy with a soldering iron and extremely mechanical in nature. I came across a site (pinrepair.com) that had some diagnostics for checking System 1 problems so I printed off some of the instructions and I was able to follow without much problem however I wasn't able to repair my issue(s).
The problem(s) I'm having is that the out hole doesn't recognize or kick the ball out of the hole while playing a game and also the display's are showing garbage in attract mode as well as the ball count display is garbled but the credits are OK, the displays all test fine in test mode
I pulled the control board and tested all the transistors (http://www.pinrepair.com/sys1/index.htm#testtrans), none were bad and all were within range so I reinstalled the board. I did the ground repair that was spoken about and common with System 1 games and also checked the voltages at the power supply for 42 and 60 volts.
I also tested the 7417 chips as described below on the CPU board and they tested fine - all the coils fired as expected.
++++++++++++++++++++++++++++++++++++
7417 chip Test (CPU board locations Z6,Z7).
The 7417 chips at Z6 (located just above connector J5) and Z7 (to the right of Z6) can also be used to test the connection from the CPU board to the driver board, and to test the transistors at Q25-Q32 (all the CPU controlled coils).
With the game on, attach an alligator clip to +5 volts (the positive/upper lead of capacitor C16 on the CPU board). Then touch the Z6 pins 1-6 and pins 8-13 (note pin 7=gnd and pin 14=+5). Each pair of pins (for example Z6 pins 1,2) should fire its associated coil when attached to +5 volts. The same thing can be repeated for Z7 pins 1-4 (only). Refer to the above chart to see which Z6/Z7 pins control which driver board transistor/coil. If only one of the two pairs of pins activates the coil, the Z6 or Z7 chip is bad. If neither pin activates a coil, check the CPU to driver board connector and the driver board transistor.
++++++++++++++++++++++++++++++++++++
I think I have 2 problems going on - 1 with the displays and the other with the out hole.
Hopefully someone can give me a hand with this..
Merry Christmas!