Topcon TRC-NW8, Instruction Manual

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BEFORE REQUESTING SERVICE
Troubleshooting
When an error is encountered, review the Check List below.
If, after following the instructions below, you still cannot restore the instrument to a normal con-
dition or if the problem does not fall into any of the categories below, contact your dealer or
TOPCON (see the back cover).
Check List
WARNING
To avoid electric shock, do not attempt disassembling, rebuilding and/
or repairs on your own. Ask your dealer for repairs.
WARNING
Do not remove the covers from the main unit, chinrest unit or power
supply unit except for the lamp house cover. You may receive an
electric shock.
Problem Condition Check Page
Color LCD monitor
does not work. • Power cable is off the outlet/instrument. Connect power cable.
22
• Fuse has blown. Change fuse.
75
• Power save function is on (flickering
power lamp).
Press Photography switch and cancel
power save function.
34
Periphery of photo-
graphic image is dark. • Centring is incorrect. Adjust centering. 41
• Focusing is incorrect. Adjust focus. 43
• Patient’s pupil is not large enough. Darken room and thoroughly dilate
patient's pupil.
42
Photographic image is
flared all over.
(The whole is cov-
ered with light.) • Centering is incorrect. Adjust centering.
41
• Focusing is incorrect. Adjust focus.
43
• Opacity in patient's eye. Flare cannot be removed.
—
Photographic image
has a dim white spot. • Objective lens is stained. Clean lens.
79
• Eyelashes were in the way the moment
the photograph was taken. (Dim light
was seen at the screen bottom the
moment the camera was aligned.)
Let patient open eye wider and take pic-
ture again. If not wide enough, open eye-
lid (i.e., Take picture holding eyelid open).
44
Photographic image is
dark all over. • Flash level is insufficient. Adjust flash level (Flash level switch).
39
• Xenon set screws are loose. Refasten the xenon PCB.
74
• Xenon lamp has served its life. Change xenon lamp. 73
Illumination lamp does
not turn on. • Power save function is on (flickering
power lamp).
Press Photography switch and cancel
power save function.
34
• Lamp terminal is loose. Refasten lamp terminal.
73
• Fuse has blown. Change fuse.
75
• The lamp has burned out. Change lamp.
72
Internal fixation target
cannot be seen. • Centering is incorrect. Adjust centering.
41
• Setting is to external fixation target. Reset to internal fixation target.
28
• Fuse has blown Change fuse.
75
( ) scale is off monitor
center. • Internal fixation target is set to periphery. Press fixation target selector switch (reset)
to set the fixation target in the center.
47