Taito Ice Cold Beer

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1 PinSide ICB Owners Thread

A very lengthy thread regarding the Taito ICB model can be found here.

2 Test Point Typical Values

The following behavior represents correct operation for a fully working MPU board

R (reset) - transition from low to high at power on
E (clock) - pulsing
IRQ (interrupt request) - high
FIRQ - pulsing high
HZ30 - pulsing rapidly
SINT - pulsing rapidly
Timer - low
MOTENBL (motor enable) - low
SWIRQ - low

3 Florescent Lamp

The original playfield lamp is an F15T12. The fluorescent light degrades the paint on the backglass. The florescent tube can be replaced with a modern LED, such as TBD.

4 DIP Switch Settings

This image from the ICB manual, was also stapled to the inside of the rear door.


5 Component Image Gallery

Power Supply Top View
Power Supply Bottom View
Power Supply PCB Schematic
Power Supply PCB Component Side. Note addition of 1000uf/63V capacitor as shown in the schematic
Power Supply PCB Component Side
Power Supply PCB Solder Side. Fractured solder joints can be problematic for this board


6 MPU and "Diode Check" Map

PCB Component Side
PCB Solder Side


Diode Check Results


The image at right shows "diode test" results for the entire board. Procedure

  • set meter to diode check
  • red probe on ground
  • black probe used to test every other pin of each IC


7 Taito Service Tips

The following service tips were issued by Taito, and cover...

  • Weak errant ball solenoid
  • Ball sticks between hole and bar in attract mode (ROM revision)
  • Lubrication of side rods
  • Ramifications of stuck switch in the switch matrix
Weak errant ball solenoid
Ball sticks between hole and bar in attract mode (ROM revision)
Lubrication of side rods
Ramifications of stuck switch in the switch matrix


8 Diagnostics

YT.png A video demonstrating MPU diagnostics can be found here.

9 Connector Pin-out

Interface condensed by Chris Hibler.

10 Parts Bill of Materials

This PBOM is subject to typos.
Please submit corrections to Chris Hibler (chrishiblerpinball AT gmail.com). Thanks!

Knot hole view, ICB PBOM


A detailed PBOM sorted by part designation as well as in traditional parts count order can be found here.

11 Motor Replacement

Replacement motors for Ice Cold Beer were available from Twisty Arcade a few years ago. The installation procedure for this motor, or an equivalent can be found below. The principle part of the job is to transfer the gear from the old motor shaft to the new motor shaft, and modify the motor bracket to mate to the new motor.

The motor from Twisty Arcade came with a 6.2ohm, 5W resistor. It may be necessary to replace this part with a 10ohm, 5W resistor to slow the motor a bit more. If your game raises the bar too far to "serve" the ball, install a replacement resistor of perhaps 8.2ohm, 5W, or even the 10ohm part.