Chapter 3 Troubleshooting - Epson FX 890 - B/W Dot-matrix Printer Service Manual

1. Printer fails to operate when power is on.
Measure the +35V line at pin 7
Measure the +5V line at pin 3 or 4
of CN2 on C229PSB/PSE/PSH.
Verify each motor and printhead solenoid
resistance,referring to Table 3-1 and Table 3-2.
Rev. B
START
Is AC input
voltage normal?
120V version: 85 - 138V
230V version: 187 - 276V
Universal Version: 85 - 276V
YES
Are the fuses F1 on
C229PSB/PSE/PSH blown?
NO
or 8 of CN2 on
C229PSB/PSE/PSH.
Is output voltage
normal?
YES
Is output voltage
normal?
YES
Are the resistances
normal?
YES
Replace the C229MAIN.
END
Figure 3-4. Flowchart (1)
NO
Use the correct AC input voltage.
No fluctuation from AC voltage range is
YES
NO
Is the new fuse also blown when
power is turned on again?
NO
NO
Replace the C229
NO
Replace the applied
FX-1180/FX-880 Service Manual

Chapter 3 Troubleshooting

permitted.
Replace the fuse.
YES
Replace the C229
PSB/PSE/PSH.
PSB/PSE/PSH.
unit.
3-5