Measuring The Dc Voltages (Test Points) - Tektronix Z740/N - Phaser 740 Color Laser Printer Service Manual

DC Output: With the VOM set to measure DC voltages, measure voltages at CN301
for +5 VDC and +24 VDC. If the voltage is not correct, replace the power supply. The
following illustration shows the test points.
Power supply
CN 301
Pin 9 - +24 V
Pin 8 - GND
Pin 7 - GND
Pin 6 - GND
Pin 5 - +24 V
Pin 4 - +24 V
Pin 3 - GND
Pin 2 - +5 V
Pin 1 - +5 V

Measuring the DC voltages (test points)

If DC voltages are not being output by the power supply, proceed to the next step,
"Inspecting the power supply fuses" on page 35.
If the +5 and +24 VDC voltages measure correctly, but the printer does not operate
correctly, then proceed to the topic, "Safety interlocks."
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