Epson Stylus PHOTO 890 Service Manual page 70

EPSON Stylus Photo 890/1280/1290
Table 3-9. Remedies for Fatal Error (continued)
Step Problem Check & Actions
4 Ditto Turn the printer on and check for the correct voltages at
the pins shown in the figure below:
• When the ASF HP detector wheel is in home
• When the ASF HP detector wheel is out of home
TROUBLESHOOTING
CN6
To Pin 3
(ASFV)
To Pin 2
(GND)
position, the voltage is 0.7 V or less.
position, the voltage is 2.4 V or more.
Table 3-9. Remedies for Fatal Error (continued)
Step Problem
5 The printer is turned on
and the carriage and the
PF motor move a little.
After that, a fatal error
is displayed.
6 The printer is turned on
but the CR motor does
not operate at all. After
that, a fatal error is
displayed.
Overview
Check & Actions
Check for the signal output from the PF encoder at either
pair of the following pins on the main control board:
• Pin 1 an Pin 4 of CN12
• Pin 1 and Pin 2 of CN12
Check for the signal output from the linear encoder at
either pair of the following pins on the main control board:
• Pin 1 an Pin 4 of CN12
• Pin 1 and Pin 2 of CN12
Encoder Output Waveform
Measure the coil resistance of the CR motor using a meter
as shown below:
Ω ±
Resistance: 29.2 25%
CR Motor CR Motor
Revision C
70