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Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-49
General Troubleshooting
This test determines averaged readings for key system voltages.
This test drives the Process Drive to move the Wiper Blade a short distance in
each direction to verify the home position.
Voltages
R# Definition
Typical
Value
(8400)
Typical
Value (8500/
8550/8560)
Actions
Main Board Voltages
0 5 Volts (volts) ~5V ~5V
1 1.8 Volts (volts) ~1.8V ~1.8V
2 2.5 Volts (volts) ~2.5V ~2.5V
3 3.3 Volts (volts) +/-2.5% +/-2.5%
4 unregulated12
Volts (volts)
+/- 20% +/- 20%
5 2.5 Volts (volts) ~ 2.5 ~ 2.5
6 unregulated
Negative 12 Volts
(volts)
+/- 20% +/- 20%
Control Board Voltages
7 DC Power (watts)
8 50 Volts 47 to 52 47 to 52
9 Negative 50 Volts -47 to 52 -47 to 52
10 Unregulated
Negative 15 Volts
-11 to -16.5 -11 to -16.5
11 Unregulated 15
Volts
11 to 17 11 to 17
12 AC Volts 120 Volts 90 to 140 90 to 140
AC Volts 240 Volts 180 to 275 180 to 275
Wiper Alignment
R# Definition
Typical
Value
(8400)
Typical
Value (8500/
8550/8560)
Actions
0 The engage wiper
position (min)
50 to 400 Reports the distance from
wipe home to the tilt engage
position.
1 Upper hard stop
wiper position
(min)
2000 to
5000
Reports the distance from
wipe to home to the upper
hard stop.