The ball launcher, laser kick and top VUK do not fire, while the coils driven from the other two positions on the playfield power board work.

Ball launch, laser kick and VUK dead: missing transistors on the playfield power board

Cause: Three of the five TIP36C driver positions on the playfield power board (with their resistors and diodes) had been left empty, and two small pre-driver transistors had also failed.

Checks

• Inspect the playfield power board for empty transistor, resistor and diode positions; a factory board normally has all five TIP36Cs fitted.
• Check the schematic carefully: on some boards the part numbers in the manual don't match the board legend.
• Test the pre-driver transistors on the driver board for the dead coils.

Fix

• Fit the missing TIP36C transistors with their resistors and diodes, and replace the failed pre-drivers (Q40 and Q43 here).

Systems

• Data East CPU Version 3

Games

• Adventures of Rocky and Bullwinkle and Friends

Related tips

• Rocky pop-up in the backbox won't fire, even with a new coil: bad driver Q41
• Upper playfield lamps dead with a good fuse: bad wiring at J5 on the power board
• Kickback locks on as soon as its switch is hit and blows Q3: coil diode backwards
• F5 blows on a flip, then slings dead: shorted drivers and a loose coil power wire
• 50 V coils use PPB TIP36c transistors, pre-driven from the CPU board
• Launcher, scoop, VUK, one pop bumper and knocker all dead: failed TIP36C on the PPB board
• MRB and PPB playfield power boards
• Solenoid driver transistor positions on the CPU and PPB boards

Source: Pinball Repair help group!! (Facebook group)