Figure 6-1 Measuring The Dc Voltages (Test Points); Inspecting The Power Supply Fuses - Tektronix PHASER 560 Service Manual

6
Troubleshooting
6-4 Phaser 560 Color Printer
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4. 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 -FSACTL
Pin 8 -+5 V
Pin 7 -+5 V GND
Pin 6 -+5 V IP
Pin 5 -+5 V IP
Pin 4 -+5 V IP GND
Pin 3 -+5 V IP GND
Pin 2 -+24 V GND
Pin 1 -+24 V

Figure 6-1 Measuring the DC voltages (test points)

If DC voltages are not being output by the printer, proceed to the next step,
"Inspecting the power supply fuses" on page 6-4.
If the +5 and +24 VDC voltages measure correctly, but the printer does not
operate correctly, then proceed to the topic, "Safety interlocks."

Inspecting the power supply fuses

The 115 VAC power supply features a 10 A and 6.3 A fuse. The 220 VAC power
supply fuse uses an 6.3 A fuse.
1. Turn off the printer.
2. Remove the power supply as explained in the Chapter 8 topic, "Power
supply" on page 8-15.
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