Vfd Check - Yamaha RX-Z9 Service Manual

RX-Z9/DSP-Z9

8. VFD CHECK

• This program is used to check the FL display section. The
display condition varies as shown below according to the
sub-menu operation.
• Internal /external synchronization of the image signals sub-
ject to the microprocessor control is set to forced external
synchronization.
8.VFD CHECK
Segment conditions of the FL driver and the FL tube are
checked by turning ON and OFF all segments. Next, the
operation of the FL driver is checked by using the dimmer
control. Then 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 sec-
ond row from the top are shorted.)
50
EFFECT OFF
Initial display /
All segments OFF /
All segments ON (dimmer 100%) /
All segments ON (dimmer 50%) /
Lighting of segments in lattice /
Lighting in lattice /
Short / Normal /