Epson Stylus pro 7900 Repair Manual page 206

Pro 7900 and 9900 Field Repair Guide
APG Explanation
and
ASF
Errors
1536 Pressure Sensor Error
1537 Air Pressurization Error
153A Over Current Error
153B Over Speed Error
153C Rotation Direction Error
153D Driving Time Out Error
153E Velocity Deviation Error
153F Under Speed Error
Printer Error Codes (Service)
Description
The Air Pressure Sensor
always reports pressure.
The Air Pressure Sensor
reports insufficient air pres-
sure.
The Pinch Roller Release
Motor draws too much cur-
rent
The Pinch Roller Release
Motor spins too fast.
The Pinch Roller Release
Motor spins in the wrong
direction.
The Pinch Roller Release
Motor does not spin, or
spins too long.
The Pinch Roller Release
Motor spins at irregular
speeds.
The Pinch Roller Release
Motor spins too slow.
Printer Component, Software Item,
Remedy
1. Visually check the Pressure sensor on
the Pressure Pump Assembly
2. Replace the Pressure Pump Assembly.
3. Replace the Main Board.
1. Check Ink Cartridges.
2. Check Pressure Pump.
3. Check Ink Bays.
1. Check the Pinch Roller Release Motor.
2. Check the Main Board.
1. Check the Pinch Roller Release Motor.
2. Check the Main Board.
1. Check the Pinch Roller Release Motor.
2. Check the Main Board.
1. Check the Pinch Roller Release Motor.
2. Check the Main Board.
1. Check the Pinch Roller Release Motor.
2. Check the Main Board.
1. Check the Pinch Roller Release Motor.
2. Check the Main Board.
LCD Display, Printer Button
10/6/10
Page 206.