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8. MAINTENANCE, TROUBLESHOOTING
8-9
Panel test
The panel test checks the controls on the control unit for proper operation.
1. Press a key. If the key is normal, "1" is shown at the key's on-screen location when
the key is pressed; "0" when it is released. (The POWER switch cannot be
checked.)
2. Operate the TILT lever. If the lever is normal, "1" appears when increasing the tilt
angle, "2" when decreasing the tilt angle and "0" when the lever is released.
3. Operate the trackball. Its X-Y coordinate changes with trackball rotation. The co-
ordinates are "0" until the trackball is operated.
4. Operate the GAIN and RANGE controls. The on-screen indication is "-1" with
counterclockwise rotation and "1" with clockwise rotation.
Panel test
00
00
00
00
00
00
X=0
Y=00
0
0
0
00
0
PANEL TEST
PRESS [MENU] KEY TO EXIT
Trackball position in
X-Y coordinate