Chapter 3 Troubleshooting - Epson FX-880 Service Manual

1. Printer fails to operate when power is on.
Measure the +5V line at pin 3 or 4
Verify each motor and printhead solenoid
resistance,referring to Table 3-1 and Table 3-2.
Rev. A
START
Is AC input voltage normal?
120V version: 85 - 138V
230V version: 187 - 276V
YES
Are the fuses F1 on
C229PSB/PSE blown?
NO
Measure the +35V line at pin 7
or 8 of CN2 on C229PSB/PSE.
Is output voltage
normal?
YES
of CN2 on C229PSB/PSE.
Is output voltage
normal?
YES
Are the resistance
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?
Replace the C229
NO
NO
Replace the C229
NO
Replace the applied
FX-880 Service Manual

Chapter 3 Troubleshooting

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