Epson TM-FX2180 manual Waveform

EPSON FX-2180 Service Manual
Table	3-7. Repairing the Main Board Assembly (Continued)
Problem		Cause	Checkpoint	Solution

		Chapter 3 Troubleshooting
Table 3-7. Repairing the Main Board Assembly (Continued)
Problem	Cause	Checkpoint	Solution

Carriage operation is abnormal.

The CPU or	∙ Check the input signal	∙	If an input
IC9 is	waveforms (CH 1) at		signal is not
defective.	pins 5, 6, 16, and 17 of		correct,
	IC9.		replace the
	∙ Check the output signal		main board.
	waveforms (CH 2) at	∙	If an output
	pins 1, 8, 11, and 18 of		signal is not
	IC9.		correct,
			replace IC9 or
			the main
			board.
	CH 1
	CH 2
	Figure 3-15. Waveform 8

IC1 is	Check the output signals at	If an output signal
defective.	pins 62, 63, 64, and 65 of	is not correct,
	IC1.	replace the main
		board.

Paper	IC1, IC2, or	∙ Check the input signal	∙	If an input signal
feeding is	IC12 is	waveforms (CH 1) at		is not correct,
abnormal.	defective.	pins 26 and 43 of IC12.		replace the
		∙ Check the output signal		main board.
		waveforms (CH 2) at pins 3,	∙	If an output
		6, 18, and 21 of IC12.		signal is not
				correct, replace
				IC12 or the main
				board.
		CH 1
		CH 2
		Figure 3-16. Waveform 9
No data is	The CPU is	Check the output signal	If an output signal
printed.	defective.	waveforms at pin 15 or 19 of	is not correct,
		IC2.	replace the main
			board.
		Figure 3-17. Waveform 10

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