Epson EPI-4000 Product Support Bulletin page 7

GQ-3500 Display Codes
do
EO - 00
EO - 01
EO - 02
EO - 03
EO - 05
EO - 06
E1 - 80
E1 - 81
E1 - 82
E1 - 83
E1 - 84
E1 - 89
E1 - 91
E1 - 92
E1 - Al
E1 - A2
E1 - A3
J0
J1
J2
Po
PU
To
U1
U2
Cover Open error
Engine driver CPU error.
Option tray CPU error.
Option tray motor error.
Optical unit error.
Main motor error.
Fusing unit error.
Exception error.
Trap error.
Bus error.
Address error.
Illegal Instruction.
NMI error.
Reverse vector interrupt error.
User vector interrupt error.
System RAM error.
External RAM error.
CG ROM error.
Paper feed error.
Paper feed jam.
Paper exit jam.
Paper empty, paper tray is not installed or paper is not
installed properly.
Paper size error.
Toner empty.
Replace the collector unit and lens shield.
Replace the drum cartridge and lens shield.