Epson Stylus Pro 4900/Epson Stylus Pro 4910  Revision A
TROUBLE SHOOTING  Remedies for Error Messages related to SpectroProofer  75
Confidential
65
Drying Fan lock 
detection error
The Drying Fan is not rotating.
 There is a foreign object stuck in the fan.
 Connection failure of the Drying Fan
 Drying Fan failure
1.  Check if there is any foreign material on the fan, and 
the fan can rotate manually.
2.  Check the connection of the Drying Fan for 
disconnection and damage.
3.  Carry out “Fan Function Check” from “SpectroProofer 
Movement Check”. (See P.404)
Replace the Drying Fan. (See P.268)
80
ILS calibration error
Color measurement is not properly conducted. 
 White calibration tile holder failure
 SpectroProofer failure
1.  Check if the White calibration tile holder is installed, 
and the tile is not contaminated.
2.  Check if there is any dirt on the lens of the 
SpectroProofer.
3.  Check if the SpectroProofer lamp burned out.
Replace the SpectroProofer and White 
calibration tile
D5
CR related drive error
Detects that the driving period of the CR Motor is 
irregularly long.
 Irregular load
 Firmware becomes out of control.
---
Replace the Main Board. (See P.152)
D6
Paper pressing related 
operating error
Fatal error related to the Paper Pressing Motor control 
occurred.
1.  Check the following connection for disconnection and 
damage, and cable installation is correct.
 Encoder for paper pressing motor to Main-C Board
 Paper Pressing Motor to Main-C Board
2.  Carry out “Paper Press Function Check” from 
“SpectroProofer Movement Check”. (See P.404)
1. Replace the encoder for Paper Pressing 
Motor. (See P.266)
2. Replace the Paper Pressing Motor. (See 
P.269)
3. Replace the Main-C Board. (See P.264)
4. Replace the Main Board. (See P.152)
Code Details Cause Check Item Remedy