January 2010
2-75
Phaser 7760 Color Laser Printer
007-270
Status Indicator RAP’s
Revised
007-270 Tray 2 Paper Size Sensor Broken
An abnormal A/D value was detected by the Tray 2 Paper Size Sensor.
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/J536-B9 (refer to Section 7, I/F PWB,
MAIN Motor, LVPS T11 - Plug/Jack Locations - Figure 16) on the I/F PWB corresponds to
the paper size in Table 1.
YN
There is +3.3 VDC from P/J115 pin 1 to P/J115 pin 3 on the Tray 2 Size Sensor (refer
to Section 7, Developer Motor, Tray 2 Size Switch - Plug/Jack Locations - Figure 17).
YN
There is +3.3 VDC from P/J536-B10 to P/J536-B8 (refer to section 7, I/F PWB,
MAIN Motor, LVPS T11 - Plug/Jack Locations - Figure 16).
YN
Go to the +3.3 VDC Wirenet (Section 7, +3.3 VDC Wirenet - Figure 1) to trou-
bleshoot the power circuit.
Check the wires from J414-11 to J115-1 (Figure 1).
Check the wire from J414-9 to J115-3 (Figure 1).
Check the connection between the I/F PWB and the MCU PWB. If the check is OK, replace the
I/F PWB (PL 9.1). If the problem continues, replace the MCU PWB (PL 13.1).
Figure 1 007-270 Tray 2 Paper Size Sensor
Table 1 Tray 2 Size Sensor Values
Paper Size S1 S2 S3 S4 Voltage
No Tray OFF OFF OFF OFF 3.18
A3 SEF OFF OFF OFF ON 2.96
11x17 SEF OFF OFF ON OFF 2.75
8.5x13 SEF OFF OFF ON ON 2.55
B5 or 16K LEF OFF ON OFF ON 2.12
B5 or 8x10 SEF OFF ON ON OFF 1.92
8.5x11 SEF OFF ON ON ON 1.71
B4 or 8K SEF ON OFF OFF ON 1.32
A4 SEF ON OFF ON OFF 1.24
8.5x14 SEF ON OFF ON ON 0.92
A4 LEF ON ON OFF ON 0.51
8.5x11 LEF ON ON ON OFF 0.32
A5 or 5.5x8.5 SEF ON ON ON ON 0.12
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