Revision C MAC 1200/1200 ST 13-3
2012250-021
Troubleshooting: Troubleshooting Chart
Troubleshooting Chart
Symptom Cause Remedy
Periodic superimposition of AC line
interference (50 Hz) (see figure below)
Interference from the power line Ground bed, verify position of the leadwires, switch
on AC line filter
Superimposition of irregular AC line
interference (see figure next page)
Muscle artifact caused by patient
movements, hiccup, coughing
The patient should be warm enough and resting
comfortably (place cushions under arms and knees).
Comfort or distract patient, enable muscle filter
(20 Hz / 40 Hz), if necessary.
The printed date and time are incorrect Built-in lithium battery is depleted.
The battery has a life of
approximately 5 years
Notify service to check and/or replace battery
The green indicator does not light up,
although the recorder is connected to the
power line
Defective AC power adapter or
fuse
Notify service to check and/or replace fuse
The recorder does not write over the
entire paper width
Paper compartment not properly
closed
Paper door must lock into place on both sides
In Automatic mode, the recorder does not
stop and continues to feed paper. This
does not happen in Manual mode.
The paper pad was inserted the
wrong way round so the recorder
cannot detect the cue mark
Insert the paper pad as instructed
Recorder does not start after activation of
the key, or the recording is
aborted.
Unit operated on battery power:
battery discharged
Connect recorder to the power line. After a few
minutes, the recorder is able to resume operation.
Always connect recorder to the power line when
indicator lights up. The battery capacity depends on
age, temperature and charge level. (See Chapter 3,
“Operating and Performance Tests” for details.)
No recording in Automatic mode Failure of at least one electrode Check all electrodes or enable Override function.
(See Chapter 10, “Automatic Mode” section for
details).
Paper jam Open paper compartment and removed jammed
sheet, place beginning of paper between the marks,
close paper compartment and press .
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