Nikon SC - Electrical System Issues

3. Electrical system
Failures
Causes-
Actions
Lamp does not light
oven though bright¬
ness control dial
\arned ON
• No electric current flows —
• Lamp bulb has burned out -
• Fuse has burned out-
Disconnection in the circuit-
Insert the power source
cord into the socket
Replace the lamp bulb
Replace the fuse (1 A)
Repair the disconnec¬
tion
Lamp bulb burns
out immediately after i
being lit
Unspecified lamp bulb is used
Instrument is used in a place subject to •
vibration
Use the specified Nikon
bulb
Choose a place free
from vibration
Lamp lights but no
light appears in
eyepiece
Image brightness is
insufficient
Revolving nosepiece is not correctly set ■ Set the revolver correct¬
ly with a click
Silver surface of the bulb is turned upward—» Attach the bulb correct¬
ly
Surface of the bulb is not clean-- Clean the bulb surface
Condenser diaphragm is closed-* ■ Open the diaphragm
to match specimen
Condenser is excessively lowered-» Raise the condenser to
its limit
Unspecified lamp bulb is used-* Use the specified Nikon
bulb
Brightness control dial is not turned-- Control the dial proper-
sufficiently ly
Dirt on the lens surfaces of condenser,- ► Clean the lens surfaces
objective and/or eyepiece
Flickering or unstable ' • Lamp bulb is going to burn out-
brightness of lamp • Poor contact of electrical part -
Replace the lamp bulb
Repair the contact
Fuse is liable to be
blown up
No specified fuse is used-
Use the specified fuse
1A/250V
14