Xerox DocuColor 2240, Service Manual

Page: 174 / 1489

09/03
2-141
DC 3535/2240/1632, WC M24
7-277
Status Indicator RAPs Initial issue
7-277 Tray 4 Paper Size Sensor (TTM)
An abnormal A/D 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 16.1 ) for damage or incorrect mounting. Repair
or replace as required.
• Check the switch actuators on Tray 4 ( PL 16.1 ) for wear or damage. Repair or replace as
required
Procedure
Ensure Tray 4 is closed. The voltage measured at P/J548 -5 on the Tray Module PWB ( PL
16.15 ) corresponds to the paper size in Table 1 .
Y N
There is +5VDC from
P/J824 -1 to P/J824 -3 on the Tray 4 Size Sensor.
Y N
There is +5VDC from
P/J548 -6 to P/J548 -4.
Y N
Go to the +5VDC Wirenets ( Figure 4 ) to troubleshoot the power circuit.
Go to Figure 1 . Check the wires and connectors. If the check is OK, replace the
Tray Module PWB ( PL 16.15 ).
Go to Figure 1 . Check the wires from J548 to J824. If the check is OK, replace the
Tray 2 Paper Size Sensor ( PL 16.1 ).
Go to Figure 1 . Check the wire from J824-2 to J548-5. If the wire is OK, replace the Tray 2
Paper Size Sensor ( PL 16.1 ).
Go to Figure 1 . Check the wires and connectors for intermittent shorts or loose connections. If
the check is OK, replace the Tray Module PWB ( PL 16.15 ). If the problem continues, replace
the Tray 4 Paper Size Sensor ( PL 16.1 ).
Figure 1 7-277 RAP Circuit Diagram - Tray 4 Size Sensing (TTM)
Table 1 Tray 4 Size Sensor Values
Paper Size
S1
[007-112]
S3
[007-113]
Voltage
(J548-5)
No Tray OFF OFF 4.78
B5 LEF OFF ON 4.11
8.5x11 LEF ON OFF 2.23
A4 LEF ON ON 1.59