Epson Stylus Pro 5000 Service Manual page 71

Stylus Pro5000
Table 3-12 .Abnormal Phenomenon:
LED indicates "Fatal Error".
Step 1: Summary
The printer indicates "Fatal Error" condition by bringing all LEDs on. This
is caused by the troubles occurred in the driver lines including electrical
circuit, as shown below:
T
Trouble occurred in the CR motor control mechanism
T
Trouble occurred in the PF motor control mechanism
T
Trouble occurred in the pump/ASF drive mechanism
(Occurs when an abnormally excess force applied to a specific
gear train or mechanism is preventing the motor from rotating.)
To find out the cause of the problem, follow the steps and isolate the
defective part. Exceptionally, you can go straight to the corresponding
step for a quick solution when you notice the following problem:
The printer operates at power on and then indicates "Fatal Error" when
it enters a specific sequence. (Ex.: The PF motor rotates normally at
power on but enters "Fatal Error" condition when the CR starts
moving.)
Therefore, be sure to refer to the following steps when "Fatal Error"
occurs at power on only.
Note: Following steps correspond to the sequence which the
mechanisms operate.
Step 2: Checking the PF motor drive line
At power on, the PF motor is driven first. If you notice "Fatal Error"
immediately after power on, you are to check the following parts to see
the condition of the PF motor drive line:
T
Check internal coil resistance for the PF motor. If the result does not
meet the specification, replace the motor.
Specification: 2.8 10% (each phase)
Check points: Between Pins 1 and 3 or Pins 2 and 4 for CN15
on the C228DRV board
T
Replace the C228DRV board and check for the proper operation.
T
Replace the C228MAIN board and check for the proper operation.
Rev. A
Table 3-13 .Abnormal Phenomenon:
LED indicates "Fatal Error". (Continued)
Step 3: Checking the CR motor drive line
When the PF motor drives and releases the CR lock and ink valve
mechanisms, the CR motor comes in operation. The printer then checks
that the CR shifts in the scanning area normally. Therefore, if "Fatal
Error" occurs while the CR is in operation after PF motor drive is
complete, check the following for the correct operation of the CR motor
line:
T
Check internal coil resistance for the CR motor. If the result does not
meet the specification, replace the motor.
Specification: 4.3 10% (each phase)
Check points: Between Pins 1 and 3 or Pins 2 and 4 for CN14
on the C228DRV board
T
Replace the C228DRV board and check for the proper operation.
T
Replace the C228MAIN board and check for the proper operation
Step 4: Checking the Pump/ASF motor (1)
After the CR moves normally and returns to the home position, the
printer starts ink absorbing operation (Timer-CL) for the period
determined based on the power off time. To enter this operation, the D/E
mechanism (Disengage Mechanism), or the switch for the pump gear
train, crashes into the carriage to transmit torque from the Pump/ASF
motor to the gear train on the pump side. If "Fatal Error" occurs during
this operation, following must be checked:
T
Check internal coil resistance for the Pump/ASF motor, and replace
the motor if the result does not meet the specification.
Specification: 3.9 10% (each phase)
Check points: Between Pins 1 and 3 or Pins 2 and 4 for
CN16 on the C228DRV board
T
Check the D/E switch, a slider switch on the home position side,
manually for the proper operation. (Push the switch into the HP side
and see if it bounds with spring tension.)
T
Rotate the transmission gear (white) next to the motor pinion gear
manually and check that each transmission gear for pump drive turns
smoothly.
T
Replace the C228DRV board and check for the proper operation.
T
Replace the C228MAIN board and check for the proper operation.
Chapter3 Troubleshooting
3-6