DC503/Repairs

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Repair Issues

  • If no LED or display segment is lit after trun on, check for +15 V from U500 Voltage regulator IC type 723.
  • All ICs are placed in IC sockets. Contact problems can occur. Removing and inserting ICs may help temporarily.
  • Check board is mounted to frame with plastic washers in between near pcb conductor tracks, otherwise a short to GND can occur.
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