If your having issues with your QBert power supply I highly recommend a complete rebuild. Most qberts have or will have power supply failure, its just a matter of time. Don't wait until it fails as it will likely take out the sound board when it goes. This kit was put together with many upgrades for weak components that commonly fail on these boards. In no way will this make your power supply indestructible but it will increase its life greatly and bring your dead power supply back to life.
This kit can be used for other Gottlieb games such as Mad Planets and Krull that use the same power supply.
Kit includes the following items.
C12 100uf Cap
C21/C22 2200uf Caps
C31/C41 470uf Caps
D26 1N5361 27v Zener Diode(can sub 24v on request)
D12 1N4734 5.6v Zener Diode
D21-D24 1N5402 Diodes (not pictured)
Q11 MJE2955 Transistor
Q12 TIP31C
Q21 2N3055 Transistor
R12 100 Ohm 3w Resistor
R13/R14 12 Ohm 3w Resistors
R21/R22 1.8K Ohm 3w Resistors
U31 7812 +12v Regulator
U41 7912 -12v Regulator
VR1 100 Ohm Potentiometer
Qty 2 TO-3 Transistor Insulators
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