Stern S.A.M. System Repair


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1 Introduction

S.A.M. is the current board system used by Stern Pinball. The first full production game to use the S.A.M. Board Set was World Poker Tour in 2006. One of the features of the S.A.M. board set is that the software can be updated with a USB stick.

2 Games

3 Technical Info

3.1 System Overview

The S.A.M. System board set consists of three boards in back box. The I/O Power Driver Board, CPU/Sound Board, and the Display Power Supply.

3.2 USB Code Update

Note: this information can be found on the front inside cover of S.A.M. System Game Manuals.

Step 1) Open the Back Box
Step 2) On the CPU/Sound board set Dip Switch #8 to "ON".
Step 3) Press the white Reset Button (S1 RESET) or power cycle the game.
Step 4) The DMD should show the current software version installed. Press the "SELECT" button on the inside of the coin door to continue.
Step 5) Highlight the "UPDT" icon on the display and press "SELECT".
Step 6) The game will prompt you to insert the USB Memory Stick.
Step 7) Pick the correct file on the USB drive and press the "SELECT" Button.
Step 8) Follow the directions on the display.

4 Problems and Solutions

4.1 Power Problems

4.2 MPU boot issues

4.2.1 Relocating the battery from the MPU board

4.2.2 Repairing Alkaline Corrosion

4.2.3 Connecting a logic probe to the MPU

4.2.4 Using a PC Power Supply For Bench Testing

4.3 Game resets

4.4 Solenoid problems

4.5 Lamp problems

If you have a bulb not working, seat the wiring into the IDC type socket better. I've run into a lot of these where the wires aren't seated and making good electrical contact.

4.6 Switch problems

If a switch isn't working. The three most common things I've seen is. 1- crappy switch, even if new. 2- if wires go into a IDC connector nearby, be sure they are seated good and making electrical contact. 3- broken wire at switch, or inside casing or harness, easy to quick check continuity of wiring.

4.7 Display problems

4.8 Sound problems

4.9 Flipper problems

Coils hum. The way they are power cycled causes some of this. I've also found that they get noisier with use. I then file the plunger end smooth, and the top of the coil stop smooth, where the plunger hits it. This helps a lot with noise.

4.10 Pop bumper problems

5 References

SAM system schematics are available on the Stern Pinball website here: http://www.sternpinball.com/schematics.shtml

6 Game Specific Problems and Fixes

Stern opto boards at end of trough. And boards playfield optos plug onto. I've noticed when problems arise, to reflow the solder on the optos, and pins the connectors plug onto. This eliminates a lot of problems that arise with the optos. LTG :)

Pirates of the Caribbean. The spinning disc. Check your serial numbers with the service bulletin on Stern's website. Some of the early games need to have the bearings lubricated.

And if your artwork is worn off. I've found when you put on a new decal. To put clear non-slip bath tub stuff on top of it. It works just as good at flinging the balls. And doesn't wear off as fast and get messy all over the game like the original. And easily replaced. LTG :)

7 Repair Logs

Did you do a repair? Log it here as a possible solution for others.

If you have feature lamps not working. Check the wiring pushed into the lamp socket. I've seen more than a few where the wire isn't making good contact where it is pushed in. Easy to push in better. LTG :)