Sensor Check; Confirmation Method Per Part - Epson Stylus Pro 4910 Service Manual

Epson Stylus Pro 4900/Epson Stylus Pro 4910

4.15.2 Sensor Check

This menu checks if the sensor operates normally.
Preparation
Make sure to execute Sensor Check after the printer is fully
C A U T I O N
activated. The result is not displayed if the check is executed
while the printer is not fully activated.
Make sure to turn the printer ON in the Serviceman Mode. If
the printer is turned ON in the Normal Mode, an error occurs
such as when opening/closing the cover and the Sensor Check
cannot be executed.
1. Turn the printer ON in the Serviceman Mode.
Turn the power ON while pressing [Menu
2. Start the Service Program and select
3. Refer to Table 4-8 and perform the test per repaired part.
ADJUSTMENT
] + [Paper Feed ] + [OK].
Sensor Check.
Other Printer Checks and Adjustments

Confirmation method per part

Click [Run] to switch the Sensor Check screen as follows.
Sensor with shading object: 01h
Sensor without shading object: 00h
With shading object
Shading object
Screen display
01h
Figure 4-107. Sensor Check
Table 4-8. Sensor Check
Repaired Part Procedure
1. Select [PE Sensor].
PE Sensor
2. Insert/remove paper from the manual paper
insertion opening.
1. Select [2nd PE Sensor].
2nd PE Sensor 2. Remove the Rear Unit.
3. Push/Release the actuator.
1. Select [Thermistor (Printhead)].
Thermistor
2. Confirm the value (A/D value) displayed on
(Printhead) the screen, and compare it with the threshold
value on the right column.
Revision A
Without shading object
Sensor
Screen display
00h
Confirmation Screen
Display
The displayed value is
as the following.
Paper inserted < Paper
removed
Pushed (With Paper):
01h
(P. 145)
Released (No Paper):
00h
Range of A/D value:
59<n<237
(The smaller the value
is, the higher the
temperature becomes.
The values out of the
range are regarded as
the fatal error.
Confidential
394