ValueJet 1304　Service manual
7-45 AP-74109 Rev 1.1
7. Return the carriage to the origin side.
8. Close the covers.
7.11 Media Sensor Sensitivity Adjustment
This section describes the procedure to adjust the sensitivity of media sensor.
When you have removed and installed the sensors below or MAIN board assembly, always adjust the
sensitivity of media sensor
• P_EDGE sensor
• P_REAR sensor
• When you adjust the sensor sensitivity, note the following;
• Any ambient light, such as sun light or room light, does not interfere with the sensor.
• Keep the media holding lever down so that the media is stable on the sensor during adjustment.
If media is not securely held, the sensor detection accuracy may be decreased.
• Use non-conductive screwdriver when operating the trimmer on the MAIN board assembly.
If a conductive screwdriver contacts with electronic component on the MAIN board or frame,
it may cause a short-circuit.
• Before adjusting sensor sensitivity, perform the following work.
• Install all covers except for media guide R2.
"4.2 Removal of Covers" p.4-5
7.11.1 P_EDGE Sensor Sensitivity Adjustment
(1) Jigs and Tools
The following jigs and tools are required for P_EDGE sensor sensitivity adjustment.
• Test media: MF-3G (A4)
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