High-voltage section parts on the solenoid driver board

Fuse 3/16 A. C26: 150 uF 400 V. Q21: 2N3584. Q22 and Q23: 2N3440. VR1: 1N5275A zener. CR21: 1N4004. C27, C28: 0.01 uF. R35 brown-black-yellow (100k, 1 W). R56 grey-red-orange (82k, 1/2 W). R54 grey-red-red (8.2k). R52 orange-white-brown (390 ohm). R51 red-red-orange (22k, 1/2 W). R55 brown-red-red (1.2k).

Systems

• Bally MPU AS-2518-17
• Bally MPU AS-2518-35
• Stern MPU-100
• Stern MPU-200

Related tips

• Rebuild the solenoid driver board high-voltage section
• Ground mod for high-voltage cap C26
• Display voltage too high: driver TP2 equals TP4
• Solenoid driver/regulator board test point voltages
• Solenoid driver/voltage regulator board test points
• Where the display high voltage enters and leaves the solenoid driver board
• Jumper TP1 to TP3 on the solenoid driver
• MPU locks with LED on because of C23 or Q20 on the solenoid driver board

Source: Bally solenoid driver board high voltage section rebuild