23
Subject to change without notice
H M 3 0 3 - 6 T r o u b l e s h o o t i n g
2.2 “Pump Voltage”
Locate and identify Molex connector J1008 pin 2 (3 wires) con-
necting the power supply with the CR board by a ribbon cable
and measure at the centre lead. See photo 2.2 and 2.3
Measure the “Pump Voltage” using an oscilloscope. See photo
2.4 and 2.5
Note: The pump voltage indicates the switch mode power
supply switching frequency.
2.3 -2 kV
Locate and identify Molex connector J1009 (4 wires) connecting
the power supply board with the CR board by a ribbon cable.
See photo 2.6
Check that the probe and the measuring instrument are sui-
table for measuring voltages up to 2.5 kV. Measure approx.
-2 kV at pin 3 or the appropriate wire on the CR board.
2.4 Focus Voltage
Locate and identify Molex connector J1009 (4 wires) connecting
the power supply board with the CR board. See photo 2.7
Check that the probe and the measuring instrument are sui-
table for measuring voltages up to 2.5 kV.
Measure approx. -1.5 kV at pin 4.
2.2
2.3
2.4
2.5
2.6
2.7
