EPSON Stylus Pro 7400/7800/9400/9800
Revision B
Troubleshooting
Troubleshooting based on Panel Messages
194
SERVICE CALL 0001000C
Description
PG home position detection error
Explanation
The printer causes this error and stops operation if it cannot detect the PG home
position during the power-on initialization operation or while performing platen
gap changing operation after paper is set.
Possible Causes
The PG HP Sensor connector is disconnected.
The Pump Motor connector is disconnected.
The Pump Motor harness is broken.
PG HP Sensor failure
Pump Motor failure
The PG drive gears are damaged.
The fuse for the motor driver is blown. (on the Main Board)
Check Point
1. Make sure that the PG HP Sensor and the PG drive gears are free of dust or
foreign materials.
2. Measure the resistance value of the Pump Motor. (7.0 ± 10%[
Ω
])
If the motor is shorted out, replace the C594 Main Board together with the
motor.
3. Make sure that the harnesses are connected correctly and not broken.
4. Make sure that there is no obstacle in the gear train made up of the Pump
Motor pinion gear, PG drive gear and etc.
Remedy
1. Reconnect the PG HP Sensor connector or the Pump Motor connector
securely.
2.
3.
SERVICE CALL 00010014
Description
Failure of pressurizing
Explanation
The printer causes this error and stops operation if it detects an abnormal condition
of the Pressure Sensor (air leak from the pressurizing mechanism) during the
power-on initialization operation or while performing ink supply operation.
Possible Causes
Pressure Motor failure
The connector of the Pressure Motor, Regulator Solenoid or Pressure Sensor
is disconnected.
The harness of the Pressure Motor, Regulator Solenoid or Pressure Sensor is
broken.
Regulator Solenoid failure (does not become ON)
Pressure Sensor failure
The Pressure Tube is disconnected.
The fuse for the Solenoid or the motor driver is blown.
(on the Main Board)
Check Point
1. Measure the resistance value of the Pressure Motor. (7.0 ± 10%[
Ω
])
If the motor is shorted out, replace the C594 Main Board together with the
motor.
2. Make sure that the harnesses are connected correctly and not broken.
Remedy
1. Reconnect the connectors of the Pressure Motor, Regulator Solenoid or
Pressure Sensor securely.
2. Connect the Pressure Tube.
3.
Replace the PUMP ASSY., SUPPLY
4.
Summary of Contents for Stylus Pro 7400
Page 1: ...EPSONStylusPro7400 7800 9400 9800 Large Format Color Inkjet Printer SERVICE MANUAL SEIJ05002 ...
Page 10: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Page 147: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Page 170: ...C H A P T E R 3 TROUBLESHOOTING ...
Page 207: ...C H A P T E R 4 DISASSEMBLY ASSEMBLY ...
Page 292: ...C H A P T E R 5 ADJUSTMENT ...
Page 373: ...C H A P T E R 6 MAINTENANCE ...
Page 380: ...C H A P T E R 7 APPENDIX ...
Page 385: ...Model PX 7500 7500S 9500 9500S Board C594 Main Sheet 1 of 4 Revison G ...
Page 386: ...Model PX 7500 7500S 9500 9500S Board C594 Main Sheet 2 of 4 Revison F ...
Page 387: ...Model PX 7500 7500S 9500 9500S Board C594 Main Sheet 3 of 4 Revison F ...
Page 388: ...Model PX 7500 7500S 9500 9500S Board C594 Main Sheet 4 of 4 Revison E ...
Page 389: ...Model PX 7500 7500S 9500 9500S Board C594 SUB Sheet 1 Revison C ...
Page 390: ...Model PX 7500 7500S 9500 9500S Board C594 SUB B Sheet 1 Revison E ...
Page 391: ...Model PX 7500 7500S 9500 9500S Board C594 SUB C Sheet 1 Revison D ...
Page 392: ...Model PX 7500 7500S 9500 9500S Board C594 PNL Sheet 1 Revison D ...
Page 396: ...PX 7500 7500S E PS ON S TYLUS PR O 7400 7800 No 03 R ev 01 C594 E LE C 011 202 201 200 ...
Page 397: ...PX 7500 7500S E PS ON S TYLUS PR O 7400 7800 No 04 R ev 01 C594 E LE C 021 203 204 ...
Page 398: ...PX 7500 7500S E PS ON S TYLUS PR O 7400 7800 No 05 R ev 01 C594 POWE 011 300 301 302 ...
Page 403: ...PX 7500 7500S E PS ON S TYLUS PR O 7400 7800 No 10 R ev 01 C594 ME CH 051 700 701 X15 700 ...
Page 410: ...R ev 01 C595 E LE C 011 200 201 202 PX 9500 9500S E PS ON S TYLUS PR O 9400 9800 No 03 ...
Page 411: ...PX 9500 9500S E PS ON S TYLUS PR O 9400 9800 No 04 R ev 01 C595 E LE C 021 204 203 ...
Page 412: ...PX 9500 9500S E PS ON S TYLUS PR O 9400 9800 No 05 R ev 01 C595 POWE 011 300 302 301 ...
Page 417: ...PX 9500 9500S E PS ON S TYLUS PR O 9400 9800 No 10 R ev 01 C594 ME CH 051 701 X15 700 700 ...