Once you have replaced R6 and the fuses, and set the mains transformer to 245V then you need to leave CN5 unplugged and look for the following voltages on the pins of CN5 with the negative lead of the meter connected to ground (e.g. push the probe into one of the screw heads in the bottom corner of the power board):
Note that Pin1 is at the bottom of CN5:
Pin 1 around 40v DC (not critical)
Pin2 Zero
Pin3 Zero
Pin4 +5.6V DC (should be within 5.4 to 5.7V)
Pin5 +5.6V DC (should be within 5.4 to 5.7V)
Pin6 Zero
Pin7 Zero
Pin8 +170V DC (should be between 160Vmin and 175Vmax)
Pin9 Zero
Pin10 Minus 5V DC (should be between -4.8V and -5.2V DC)
Pin11 +5.6V DC (should be within 5.4 to 5.7V)
Pin12 +12V DC (should be within 11V to 13V)
If any of the voltages are not within the ranges given then don't reconnect CN5 - come back here for advice as all of these DC voltages are critical to avoid damage to the circuit boards.