36
TROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTING GUIDE
If you suspect a problem, check the possible cause by means of the check list below.
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, rebuild-
ing or repairs. Ask your dealer for repair.
Check List
Problem Possible cause Check Page
Illumination lamp
does not work
Cable connection is
disconnected
Check cable connection. 20
Base relay cable is switched
off.
Connect the cable. 20
Plug of lamp house cover is
switched off
Insert plug. 20
POWER switch is OFF Turn ON POWER switch. 25
Brightness adjustment knob is
the minimum
Turn up brightness adjustment
knob.
30
Illumination lamp is broken
Replace it with a new
illumination lamp.
48
Socket has deteriorated Replace it with a new socket. 49
Illumination field is
not uniform/is
shady/is dark
Filter selector lever is out of
position
Click filter selector lever. 33
Fixation target lamp
does not work
Fixation cable is off Insert cable. 20
Fuse blows
Rated capacity of fuse is
incorrect
Use fuse with correct rating &
authorized fuse.
48, 50
Slit width narrows by
itself
Slit-adjustment knob torque
has been decreased
Readjust slit-width control knob
torque.
46
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