FC8600-UM-251-9370 8-14
8 TROUBLESHOOTING
8.5 Service mode
8.5.1 Sensor Test Mode & Panel Switch Test Mode
This mode checks the sensor status and the control panel switch status. If there is a bad sensor you will
observe one of the symptoms in the table below.
Please check the relevant sensor(s).
Sensor Symptom
Y home sensor The pen block hits the right side plate.
Cam sensor The plotter displays “LOAD MEDIA!” when media is already loaded.
Pinch roller sensor The pen block hits the left side plate.
+X, -X media sensor Media drops out of the plotter.
How to test the sensors
(1) Load an A2 or larger size sheet of paper in the plotter.
(2) Enter the adjustment menu (see Section 7.3.4).
(3) Press the MENU key to display the menu shown below.
(4) Press the F1 key to display the menu shown below.
Each short forms are corresponding to the sensors and the control panel switches as shown below.
Short form Sensor or key Short form Sensor or key Short form Sensor or key Short form Sensor or key
UP Up arrow key DN
Down arrow key
LT Left arrow key RT
Right arrow key
YHME
Y home sensor
PROL
Pinch roller sensor
CAM Cam sensor
XFRONT
Front media sensor
XREAR
Rear media sensor
STOP STOP key MENU Menu key COPY Copy key
CCUT Cross Cut key FAST Fast key ORIG Origin key
COND Condition key ENTR Enter key
F4 4 key F3 3 key F2 2 key F1 1 key
(5) Cover the front media sensor with a piece of paper.
The status of XFRONT changes from “L” to “H”.
(6) Cover the rear media sensor with a piece of paper.
The status of XREAR changes from “L” to “H”.
(7) Move the pen block to the far right. When the pen block reaches the home position ag, the status of
YHME changes from “L” to “H”.
(8) Lower the media set lever to raise the pinch rollers. The status of CAM changes from “L” to “H”.
(9) Move the pen block to the left and right. When the pen block crosses the pinch roller, the status of
PROL changes from “L” to “H”.
(10) Press each key on the control panel; the status will change from “L” to “H”.
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