Nidek Medical CP-690, Service Manual

Page: 16 / 70

4 - 6
4.6 The Chart Brightness is Unsuitable.
Is the setting of the light control switch
(SW2 on the BA01 board) appropriate?
[This switch has five channels; from 1
(most bright) to 5 (darkest).]
* The setting at shipment is “2”. Set the light control switch to the
appropriate channel.
(See 6.6.3.)
N
Is the working voltage ±10 % of the
rating voltage?
Y
N
Use another wall outlet or a voltage
regulator.
Y
Is there any dust on the condenser lens?
Y
Clean the condenser lens.
(See 5.13.2)
N
Is there any dust on the chart AS?
Y
Clean the chart AS.
(See 5.13.1.)
N
Is there any dust inside the lens barrel?
Y
Clean the projection lens inside the lens
barrel. (See 5.13.3.)
N
Is the setting of the voltage selector
appropriate?
N
Reset the voltage selector.
(See 6.6.1.)
Y