Xerox 6250N Service Manual - Page 171
Paper Size Switch Assembly, Power Supply
UPC - 095205770407
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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 Upper ON ON ON ON OFF OFF OFF OFF Switches Middle ON ON OFF OFF ON ON OFF OFF Lower ON OFF ON OFF ON OFF ON OFF 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