JVC CL-S200 Installation Manual page 25

Secondly, select "FUNCTION1" on OSD "FUNCTION", and press the "OK" button.
4) Select "FUNCTION1" on OSD "TEST PATTERN", and press the "OK" button.
Display method
1) Activate "Operation Button Guide ① " by pressing any operation buttons but the
Standby (Power) button.
2) Display a test pattern by pressing the "F1" button.
You can turn on and off the test pattern display by pressing the "F1" button.
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