January 2010
2-11
Phaser 7760 Color Laser Printer
001-545.01
Status Indicator RAP’s
Revised
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 (PL 2.1) for damage or incorrect mounting. Repair or
replace as required.
• Check the switch actuators on Tray 2 (PL 2.1) for wear or damage. Repair or replace as
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 - Figure 15) on the Engine Control Board (MCU
PWB) corresponds to the paper size in Table 1.
YN
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 - Figure 17).
YN
There is +3.5 VDC from P/J414-A11 to P/J414-A9.
YN
Go to the 3.3 VDC Wirenets (Figure 1) to troubleshoot the power circuit.
Check the wires from J414A to J115 (Figure 1).
Check the wire from J414A-10 to J115-2 (Figure 1).
If the problem continues, replace the Engine Control Board (MCU PWB) (PL 13.1).
Figure 1 001-545.01 Tray 2 Size Sensor
Table 1 Tray 2 Size Sensor Values
Paper Size S1 S2 S3 S4 Voltage
No Tray OFF OFF OFF OFF 3.19
B5 LEF OFF OFF OFF ON 2.13
11x17 SEF OFF OFF ON OFF 2.76
A3 SEF OFF OFF ON ON 2.91
8.5x14 SEF OFF ON OFF OFF 0.92
A5 or 5.5x8.5 SEF OFF ON OFF ON 1.12
8.5x11 LEF OFF ON ON OFF 0.32
A4 LEF OFF ON ON ON 1.31
8.5x13 SEF ON OFF OFF OFF 2.53
B4 SEF ON OFF OFF ON 1.23
8K SEF ON OFF ON OFF 1.33
A4 SEF ON OFF ON ON 1.12
8.5x11 SEF ON ON OFF OFF 1.72
B5 SEF ON ON OFF ON 1.92
16K LEF ONONONOFF2.13
8x10 SEF ONONONON1.93
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