Xerox Phaser 790 - Page 103

10/00
2-89
Phaser 790/DocuColor 2006
007-701
Status Indicator RAPs
Initial Issue
007-701 Tray 2 Open RAP
The Control Logic detected the absence of the analog signal Size Switch Sensed Voltage for
Tray 2.
Initial Actions
Ensure that Paper Tray 2 is closed.
Procedure
The Paper Tray is properly seated and fully closed.
YN
Perform the following:
• Inspect the paper tray rails and cavity for obstructions.
• Inspect the paper tray paper end guide for proper operation. If the end guide does
not operate the Size Actuator replace the Paper Tray (PL 13.9).
Remove the Size Switch PWB REP 8.19. Do not disconnect the connectors on the Size Switch
PWB. Place the Size Switch PWB so that it does not short to the machine frame. Connect the
Power Cord. Switch on the power. There is +4.76 ±0.10 VDC from J 235 pin 2 on the Size
Switch PWB and GND.
YN
Go to Flag 1. Check the wires for an open or a short circuit to ground. The wires are
good.
YN
Repair the wires. Ensure that PJ 217 on the Feeder PWB and PJ 235 on the Size
Switch PWB are properly connected.
There is +5 VDC from J 235 pin 1 on the Size Switch PWB to ground.
YN
Go to Flag 2. Check the wire for an open or short circuit to ground. The wires are
good.
YN
Repair the wires.
Replace the Feeder PWB (PL 13.4).
Replace the Size Switch PWB (PL 13.3).
Press and hold switch number SW1 and SW3 on the Size Switch PWB. There is +1.57 ±
0.10 VDC from J 235 pin 2 on the Size Switch PWB to GND.
YN
There is +5 VDC from J 235 pin 1 on the Size Switch PWB to ground.
YN
Go to Flag 2. Check the wire for an open or short circuit to ground. The wires are
good.
YN
Repair the wires. Ensure the connector PJ 235 is properly connected.
Replace the Feeder PWB (PL 13.4).
Replace the Size Switch PWB (PL 13.3).
Press and hold switch number SW2 and SW4 on the Size Switch PWB. There is +3.13 ±0.10
VDC from J 235 pin 2 on the Size Switch PWB to ground.
YN
There is +5 VDC from J 235 pin 1 on the Size Switch PWB to ground.
YN
Go to Flag 2. Check the wire for an open or short circuit to ground. The wires are
good.
YN
Repair the wires. Ensure the connector PJ 235 is properly connected.
Replace the Feeder PWB (PL 13.4).
Replace the Size Switch PWB (PL 13.3).
Replace the Feeder PWB (PL 13.4).
Table 1 Tray 2 Size Sensing Size Switch PWB
PAPER SIZE PAPER SIZE SW
ANALOG
VOLTAGE OUT
SW1 SW2 SW3 SW4
Tray Out OFF OFF OFF OFF (+) 4.76 VDC
Ledger (SEF) OFF ON OFF OFF (+) 3.45 VDC
A3 (SEF) ON OFF ON OFF (+) 1.57 VDC
Letter (LEF) OFF ON ON ON (+) 2.49 VDC
B5 (LEF) OFF ON OFF ON (+) 3.13 VDC
Legal (SEF) OFF OFF ON OFF (+) 4.09 VDC
A4 (LEF) OFF OFF ON ON (+) 3.77 VDC
B4 (SEF) OFF ON ON OFF (+) 2.81 VDC
A
A
B
B
C
C