Xerox Phaser 7760 Service Manual page 47

001-545.01 Tray 2 Paper Size Sensor
Incorrect paper size is detected in Tray 2.
Initial Actions
• Check that the paper size setting is correct.
• Check the Tray 2 Paper Size Sensor
replace as required.
• Check the switch actuators on Tray 2
required.
Procedure
Ensure Tray 2 is closed. The voltage measured at P/J414-A10 (refer to Section 7, Control
Board (MCU PWB) Plug/Jack Locations -
PWB) corresponds to the paper size in
Y N
There is +3.5 VDC from P/J115 pin 1 to P/J115 pin 3 on the Tray 1 Size Sensor (Sec-
tion 7, Developer Motor, Tray 2 Size Switch Plug/Jack Locations -
Y N
There is +3.5 VDC from P/J414-A11 to P/J414-A9.
Y N
Go to the 3.3 VDC Wirenets
Check the wires from J414A to J115
Check the wire from J414A-10 to J115-2
If the problem continues, replace the Engine Control Board (MCU PWB)
Table 1 Tray 2 Size Sensor Values
Paper Size S1 S2
No Tray OFF OFF
B5 LEF OFF OFF
11x17 SEF OFF OFF
A3 SEF OFF OFF
8.5x14 SEF OFF ON
A5 or 5.5x8.5 SEF OFF ON
8.5x11 LEF OFF ON
A4 LEF OFF ON
8.5x13 SEF ON OFF
B4 SEF ON OFF
8K SEF ON OFF
A4 SEF ON OFF
8.5x11 SEF ON ON
B5 SEF ON ON
16K LEF ON ON
8x10 SEF ON ON
Revised
Phaser 7760 Color Laser Printer
(PL 2.1) for damage or incorrect mounting. Repair or
(PL 2.1) for wear or damage. Repair or replace as
Figure 15) on the Engine Control Board (MCU
Table 1.
Figure
(Figure 1) to troubleshoot the power circuit.
(Figure 1).
(Figure 1).
(PL 13.1).
S3 S4 Voltage
OFF OFF 3.19
OFF ON 2.13
ON OFF 2.76
ON ON 2.91
OFF OFF 0.92
OFF ON 1.12
ON OFF 0.32
ON ON 1.31
OFF OFF 2.53
OFF ON 1.23
ON OFF 1.33
ON ON 1.12
OFF OFF 1.72
OFF ON 1.92
ON OFF 2.13
ON ON 1.93
17).
January 2010
2-11
Figure 1 001-545.01 Tray 2 Size Sensor
Status Indicator RAP's
001-545.01