Utility Board Modifications

Photo of the utility board

In addition, the video board has a small vero-board connected to its outer edge that controls the preflash LEDs inside each camera cryostat.

The following modifications are required to the Utility Board :

  1. R24 =1K
  2. R6 =47K
  3. JP8 has three pins, all three must be soldered together
  4. JP3 centre pin connected by a yellow wire to external edge connector pin C21
  5. JP4 two pins closest to board edge (1 and 3) soldered together, centre pin (3) connected to pin furthest from board edge (2) by a 1K resistor.
  6. C5 = 100nF ceramic
Circuit details of the LED driver board and Utility board modifications

Photo of the LED driver board.