EPSON Stylus COLOR 860/1160 Revision C
Troubleshooting Overview 73
9 Is the head driving
pre-driver defective?
If a trapezoid waveform is not output in the
previous step, check all the power transistors (Q3 -
Q4) for base waveforms. Like the head transistor in
Step 8, the base terminal input the similar trapezoid
waveforms from the pre driver IC, but any wave
form is not input at Emita terminal. Replace the
Power Transistor.
If the waveforms are not output correctly on Base
terminal of each Power Transistor, replace the
IC10 or 11 on C298 Main Board.
Otherwise, replace the C298 Main Board.
Table 3-15. Cleaning does not Solve the Print Problem (continued)
Step Check Point Action
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