Yamaha R-N402 Service Manual page 26

R-N402/R-N402D
D1. FL CHECK
This menu is used to check operation of the FL display.
D1-1. INITIAL DISPLAY
D1-2. ALL SEGMENT OFF
D1-3. ALL SEGMENT ON
D1-4. CHECK PATTERN 1
D1-5. CHECK PATTERN 2
Segment conditions of the FL tube is checked by turning ON and OFF all segments.
Next, a short between segments next to each other is checked by turning ON and OFF all segments alternately (in
lattice).
(In the above example, the segments in the second row from the top are shorted.)
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FL display
* After check, change to next menu at once.
Example
Lighting on segments in lattice.
Short Normal