Power supply Gottlieb® System 80/80A A2

New direct replacement Power Supply board for Gottlieb® System 80 and System 80A pinball machines.

FEATURES:

• Extensive use of power and ground planes for reduced
  electrical noise generation and better heat dissipation.
  
• Easy access to all components by eliminating large heat sink.
  
• Screw terminal connections installed to provide optional
  mechanical durable connections for ground, 12 volt and 5 volts.
  
• Dimensions: 3 by 8 inch board.
  
• Through-hole construction for field serviceability.
  
  
  
  SPECIFICATIONS:
  
• 5 volt switching power supply circuit is capable of
  providing up to 5 amps of power (current limited to 4 amps for
  safety purposes). Typical System 80 CPU requires 1.5 amps -
  plenty of current to spare.
  
• Soft-start power-up and built in short circuit protection.
  
• Efficient MOSFET based switching supply with a >95%
  *measured* efficiency @ 3.6 amps. This means that with a current
  of 3.6 amps to the 5 volt load - the 12 volt bridge rectifier and
  main filter capacitor circuit are actually providing less than
  1.6 amps!
  
  
  
  Measured values:
  
• Input power = 12 volts x 1.55 Amps = 18.6 watts
  
• Output power = 5 volts x 3.6 Amps = 18 watts
  
• Efficiency = 18 / 18.6 = 96.7%
  
  
  
  High efficiency design results in extended lifespan of
  transformer, bridge rectifier and main filter capacitor.
  
  Includes output voltage adjustment provided to overcome cabling
  voltage loss. Adjustable between 5.0 volts and 5.5 volts. Uses
  long life, screwdriver adjustable, sealed cermet trimmer. No
  chance of accidentally adjusting voltage too high causing
  possible component damage - even if the voltage adjustment
  trimmer fails.
  
  
  
  Less heat is generated by this supply under full load compared
  to the hot-plate design of the original power supply. The old
  supply dissipated a whopping 25.2 watts of power (based on 3.6
  amp load). This translates to a lot of wasted power - i.e.
  heat. This new supply dissipates a mere 0.6 watts of power
  based on the same 3.6 amp load.
  

Reference:

• MA-114