Overview; Troubleshooting Information; Printhead - Epson fx-2180 Service Manual

FX-2180 Service Manual

3.1 OVERVIEW

This chapter contains flowcharts and check point tables that are helpful for
troubleshooting the printer. The flowcharts facilitate identifying faulty units
or parts from abnormal symptoms. The checkpoints provides unit
characteristics, such as resistance, continuity, and so on, to which you can
refer when isolating faulty units or parts.

3.2 TROUBLESHOOTING INFORMATION

This section describes troubleshooting information to let you find the point
of replaceable unit or part.

3.2.1 Printhead

It is easy to check if a printhead is defective or not. Referring to the
following table and figure, measure the printhead coil resistance and check
if it is correct
Table 3-1. Printhead coil Resistance Test Points
Common Pin No
Test Pin No.
Test Method
(Set meter to ohms. Disconnect
the printhead after the printer is
powered off.)
Meter Reading
Rev. A
Refer to the following figure.
Refer to the following figure.
Place one lead on each pin and
the other lead on each common
pin.
± 1.64 Ω (at 25°C)
3 X
R
F
X 1 9 13 7 C1
F
COM. C1 C2 C3 C4
Pin No,
1, 7, 13 9 10, 18 6, 12
T : Thermistor terminal
X : Not used
Figure 3-1. Printhead Connenctor Pin Alignment
Troubleshooting
R
15 C5 2 C6 5 16 11 C7 17 C8 X 14 4 8
F
X 18 C2 12 C3 C4 X X
6 10 T T
R
COM. C5 C6 C7 C8
Pin No,
2, 5, 11 3, 15 16, 17 4, 8, 14
3-1