3-60 Phaser 6300/6350 Color Laser Printer Service Manual
Output Tray Is Full, Unload Paper
The Full Stack Sensor indicates the output tray is full.
Applicable Status Code:
Code 191: Output Tray is Full
Initial Actions:
■ Ensure that the output tray is empty and the actuator is in the correct 
position.
■ Cycle printer power.
■ If the problem persists, follow the procedure below.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Full Stack Sensor, PL5.4.1
■ Full Stack Actuator, PL5.4.2
■ FRONT/DUP Harness, PL5.3.28
■ Print Engine Map 1 - P/J Locator (page 10-5)
■ Print Engine Map 3 - P/J Locator (page 10-7)
■ Print Engine Paper Feed Wiring (page 10-26)
Troubleshooting Procedure Table 
Step Actions and Questions Yes No
1
Check the following for evidence of fault or 
damage:
■ Full Stack Sensor, PL5.4.1
■ Full Stack Sensor Actuator, 
PL5.4.2
Replace the parts 
concerned.
Go to Step 2.
2
Test the Full Stack Sensor.
Run the Service Diagnostics Full Stack 
Sensor test.
Does the sensor function correctly?
Replace the Engine 
Control Board 
(
page 8-104).
Go to Step 3.
3
Check the Full Stack Sensor connection.
Is P/J134 connected to the harness?
Go to Step 4. Reconnect the 
sensor.
4
Replace the Full Stack Sensor.
Does the error persist?
Go to Step 5. Complete
5
Check all pins on the FRONT/DUP 
Harness PL5.3.28 for continuity.
1. Disconnect P/J13 and P/J134.
2. Check continuity between J13 <=> J134.
Replace the Engine 
Control Board 
(
page 8-104).
Replace the 
FRONT/DUP 
Harness.