Paper Size Switch Assembly; Power Supply - Xerox phaser 6250 Service Manual

Paper Size Switch Assembly

Paper size and tray installation is detected by a combination of ON/OFF statuses of
the upper, middle, and lower switches of the Switch Paper Size Assembly. Inability of
the printer to detect the paper size loaded, or to detect the presence of the paper tray
can be the result of a bad switch.
Paper size
LEGAL14"
LEGAL13"
EXECUTIVE
B5
A4
A5 (for reference only, supported in Tray 1 only)
LETTER
No Tray

Power Supply

Low-voltage Power Supply Overcurrent Protection Circuit
This circuit stops all outputs if the 24 VDC, 5 VDC or 3.3 VDC power supply is
shorted. The circuit is reset when the short is removed, the power is turned off and
then on again.
Low-voltage Power Supply Overvoltage Protection Circuit
This circuit stops all outputs if the 24 VDC, 5 VDC or 3.3 VDC power supply
exceeds the specified voltage. The operating point is 32 VDC or more for 24 VDC,
7 VDC or more for 5 VDC, or 6 VDC or more for 3.3 VDC.
Fan Output Circuit
For the Fan Rear ON (H) signal, the output voltage varies depending on the status of
FAN LOW signal and FAN STOP signal from the Fan Control circuit on the LVPS
(refer to "Power Supplies" on page 10-16).
4-10 Phaser 6250 Color Laser Printer Service Manual
Switches
Upper Middle
ON ON
ON ON
ON OFF
ON OFF
OFF ON
OFF ON
OFF OFF
OFF OFF
Lower
ON
OFF
ON
OFF
ON
OFF
ON
OFF