Epson Stylus PHOTO 890 Service Manual page 74

EPSON Stylus Photo 890/1280/1290
Table 3-14. ASF/Pump Motor does not Work
Step Checkpoint Action
1 Getting ready for Using an oscilloscope, check the outputwaveform at CN115
checking (ASF motor connector) on the main board. For checking,
waveforms. press the Maintenance Switch to drive the CR motor.
NOTE: Be sure to disconnect the ASF/Pump motor cable.
2 Checking the Drive the ASF/Pump motor and check that the waveform
waveforms to shown below is output from each pin of CN15.
solve the
problem.
• If the waveform appears as shown, replace the ASF/Pump
motor.
• If not, replace the main control board.
TROUBLESHOOTING
Table 3-15. Cleaning Does not Solve the Problem
Step Checkpoint
1 Run the head cleaning
7 or 8 times repeatedly.
2 Perform the initial ink
charge operation.
3 Printhead FFC is
disconnected.
4 Check the cap for any
foreign matter, dirt, or
damage.
Overview
Action
Run the head cleaning by pressing the Cleaning button.
You can perform the initial ink charge operation in the
manner described below:
1. Using the adjustment program, perform the initial
ink charge operation (= resets the initial ink charge
flag in the EEPROM).
2. Turn the printer off and back on.
Take out the main board and check if the head FFCs are
connected to CN8 and CN9. If they are connected aslant
as shown below, reconnect them, and then run a print
check.
Check that the connectors are not
connected aslant.
Remove the printer
mechanism and
Dust
release the carriage
lock to move the
carriage unit away
from home position.
Damage
Then, examine the cap
rubber closely for any
problem in the figure
at right.
Rubber part
Revision C
74