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  1. Tech5

    CRT Hercule display board

    Thank you nomadradio! I took out the display board with the the DPT prefix which can be seen in the attached photo. I found the two transistors Q2, Q4 and the resistors R4 (82R) and R6 (56R). :)
  2. Tech5

    CRT Hercule display board

    Thanks nomadradio for allo the valuable information! Aha! On the Hercule schematic I have they use 4 transistors with different values for the collector resistors so with other words that is far from the two transistors you wrote about. I had a quick look at the display board and these two...
  3. Tech5

    CRT Hercule display board

    Thank you for the reply and welcome Jeff! =) There are two markings on the main board: 2994HB and EPT295013Z. I have only found one service manual but it does not match the driver transistors for the dimable back ground illumination, which is done – I think – in three steps, of the display. It...
  4. Tech5

    CRT Hercule display board

    Hi and first post here! I have a CRT Hercule on my workbench that has had the display slightly modified. Someone has replaced the background illumination from the original light bulbs to leds, but it does not work as intended. I found a service manual on the web but the display schematic is not...
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