Epson Stylus Color 980 Service Manual page 100

EPSON Stylus Color 980
Table 3-33. Cleaning does not Solve the Print Problem (continued)
Step Check Point
9 Is the head driving If a trapezoid waveform is not output in the
pre-driver defective? previous step, check all the power transistors (Q3 -
Q6) for base waveforms. Like the head transistor
in Step 8, the power transistors also output
trapezoid waveforms, but are input from the pre-
driver side.
If the waveform are not output correctly, replace
the IC15/16 or C380 Main board. If the waveform is
output correctly, replace the corresponding power
transistor.
Troubleshooting
Action
Overview
Unlike the previous products, the procedure after head replacement is
precisely specified. Therefore, be sure to follow the steps in Table 3-34
exactly. The background of the procedure is explained after the table.
Ink End Error Occurs after Printhead Replacement
Step
1 Turn the printer power off.
2 Replace the printhead.
3 Turn the printer back on. (The printer is in No Ink Cartridge
condition.)
4 Keep the Load/eject button pressed down for several seconds.
The printer enters the I/C replacement sequence. (The printer
moves to the black ink cartridge replacement position first, then to
the color cartridge replacement position if the Load/Eject button is
pressed.)
5 Input a 21-digit head IC. (Refer to Chapter 4 "Adjustment" for
details.)
6 Perform the initial ink charge operations. (Refer to Chapter 4
"Adjustment" for details.)
7 Perform the head angle adjustment. (Refer to Chapter 4
"Adjustment" for details.)
8 Perform the Bi-D adjustment. (Refer to Chapter 4 "Adjustment" for
details.)
9 Perform the Uni-D adjustment. (Refer to Chapter 4 "Adjustment"
for details.)
Revision A
Table 3-34.
Action
96