Xerox DocuColor 2240, Service Manual

Page: 171 / 1489

09/03
2-138
DC 3535/2240/1632, WC M24
7-273
Initial issue Status Indicator RAPs
7-273 Tray 4 Paper Size Sensor (3TM)
An abnormal AD value was detected by the Tray 4 Paper Size Sensor.
Initial Actions
• Check that the paper size setting is correct.
• Check the Tray 4 Paper Size Sensor ( PL 15.1 ) for damage, or incorrect mounting. Repair
or replace as required.
• Check the switch actuators on Tray 4 for wear or damage. Repair or replace as required.
Procedure
Ensure Tray 4 is properly closed. Measure the voltage at P/J548 -5 on the Tray Module PWB
( PL 15.9 ). The voltage measured corresponds with the paper size in Table 1.
Y N
There is +5 VDC between
P/J824 -1 and 3 on the Paper Size Sensor ( PL 15.1 ).
Y N
There is +5 VDC between
P/J548 -6 and 4 on the Tray Module PWB.
Y N
Go to the +5VDC Wirenets ( Figure 4 ) to troubleshoot the power circuit.
Check the wires from P/J548 to P/J824 ( Figure 1 ) for damage. Repair or replace as
required.
Check the wire from P/J548 -5 to P/J824 -2 for damage. Repair or replace as required. If
the wire check out OK, replace the Tray 4 Paper Size Sensor ( PL 15.1 ).
• Ensure that the connectors shown in the circuit diagram ( Figure 1 ) are securely con-
nected and that the wires are not damaged.
• Replace the Tray 4 Paper Size Sensor ( PL 15.1 ).
• If the problem persists, replace the Tray Module PWB ( PL 15.9 ).
Figure 1 7-273 RAP Circuit Diagram - Tray 4 Paper Size Sensing (3TM)
Table 1 Tray 4 Paper Size Sensor Values
Paper Size
S1
[007-112]
S2
[007-113]
S3
[007-114]
S4
[007-115]
Voltage
J548-5
No Tray OFF OFF OFF OFF 4.78
A3SEF OFF OFF OFF ON 4.45
11x17SEF OFF OFF ON OFF 4.12
8.5x13SEF OFF OFF ON ON 3.81
B5 or 16K LEF OFF ON OFF ON 3.18
B5 or 8 x 10 SEF OFF ON ON OFF 2.87
8.5x11SEF OFF ON ON ON 2.57
B4 or 8K SEF ON OFF OFF ON 1.98
A4SEF ON OFF ON OFF 1.67
8.5x14SEF ON OFF ON ON 1.37
A4LEF ON ON OFF ON 0.77
8.5x11LEF ON ON ON OFF 0.47
A5 or 5.5x8.5SEF ON ON ON ON 0.17