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TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING GUIDE
If you suspect a problem, use the check list below to check the possible cause.
If the check list below does not solve the problem, or if the problem is not included in the list,
contact your dealer or TOPCON (see the back cover).
CAUTION
To avoid electric shocks, do not attempt overhauling, rebuilding
or repairs. Contact your dealer for repairs.
Check List
Problem Typical condition Check Page
Illumination lamp
does not work
Power switch is OFF. Turn Power switch ON. 25
Cable connection is
disconnected.
Connect the cable. 20
Base relay cable is switched
off.
Connect the cable. 20
Brightness adjustment knob is
at the minimum setting.
Turn up brightness selector
knob.
30
Illumination lamp is broken.
Replace it with a new
illumination lamp.
34
Socket is off. Insert the socket. 34
Socket has deteriorated. Replace it with a new socket. 36
Illumination field is
not uniform/is
shady/is dark
Aperture/slit length selector
knob is not fastened.
Click the aperture/slit length
selector knob into a fixed
position.
31
Filter selector lever is not
clicked.
Click the filter selector lever in
place.
32
Illumination lamp is not fitted in
place.
Fit the illumination lamp in the
socket.
34
Fuse blows
Rated capacity of fuse is
incorrect.
Use an approved fuse with the
correct rating.
33, 36
Fixation target
(optional) does not
work
The plug above chinrest is off. Insert the plug. ––
Fixation cable is off Insert the cable. 20
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