Epson Stylus Photo 950, Service Manual

Page: 76 / 191

EPSON Stylus PHOTO 950 Revision A
TROUBLESHOOTING Overview 76
4 Is there a PE
sensor problem? Use a multimeter to check if there is a problem with the sensor.
Operate the actuator manually and check that the voltage at pin
1 of connector CN11 on the main circuit board changes as
follows.
• No thick paper : LOW
• Thick paper
: HIGH
5 Is connector
CN12 (blue: 2-
pin) on the main
circuit board or
the sensor
connector
disconnected or
loose? Connector CN12 on the main circuit board is used to send the
feedback signals from the PG sensor to the main circuit board.
Therefore, if this connector is disconnected, the same operation
occurs as if there is a problem with the PG sensor itself.
Table 3-12. Countermeasures when a paper thickness error occurs
Step Check Point Remedy
2-pin
(GND)
1-pin
(PE)
6 Is there a sensor
or actuator
problem? Try moving the actuator manually in the same was as if it were
being pushed by the adjust lever. When the actuator is released,
check that it returns automatically to its original position.
7 Is there a release
sensor problem? Use a multimeter to check if there is a problem with the sensor.
Operate the actuator manually and check that the voltage at pin
1 of connector CN12 on the main circuit board changes as
follows.
• Platen gap (PG) normal : LOW
• Platen gap (PG) large
: HIGH
Table 3-12. Countermeasures when a paper thickness error occurs
Step Check Point Remedy
2-pin
(GND)
1-pin
(PG)