Schiller AT-101, Service Handbook

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Page 49
Care & Maintenance 5
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Service Handbook Fault-Finding 5.8
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5.8 Fault-Finding
Error Cause Remedy
Unit does not switch on,
Blank Screen
• No mains supply, Green mains in-
dicator off
• Contrast wrong adjusted
• Mains supply ok, but the screen is
still not lit
"
Check mains supply
"
Check contrast. Press the function key (FN) and then the
UP/DOWN cursors keys to change the contrast.
"
Press the OFF key.
Wait a few seconds and switch on again.
"
If the screen is still not lit: Call your local SCHILLER rep-
resentative.
QRS traces overlap
• Wrong settings
• Bad electrode
"
Change sensitivity setting
"
Ensure that the automatic sensitivity reduction is not
switched off.
"
Reset signals to baseline - press the 1mV key
"
Check electrode contact - Replace electrodes
"
If traces still overlap: Call your local SCHILLER repre-
sentative.
Note: Some patients have very high amplitudes and even
on the lowest sensitivity settings, the QRS traces can over-
lap.
kNoisy’ traces
• Bad electrode
• Patient not relaxed
• Wrong setting
"
Check electrode contact
"
Re-apply electrodes
"
Ensure that the patient is relaxed and warm
"
Check all filter settings.
"
Activate Myogram filter - change cutoff frequency
"
Ensure mains filter is correct for mains supply
"
If the trace is still knoisyk: Call your local SCHILLER rep-
resentative.
No printout obtained after an
auto mode recording
• No paper
• Wrong settings
"
Ensure that paper is loaded.
"
Check Settings - ensure that at least one item is selected
for print after an auto ECG is recorded
"
If the printer still doesnkt work: Call your local SCHILLER
representative.
Printout fades or is not clear • Old paper inserted
• Wrong inserted paper
• Dirthy print head
"
Ensure that fresh SCHILLER paper is installed.
"
Note that the thermal paper used for the AT-101 is heat
and light sensitive. If it is not stored in its original seal,
stored in high temperatures or is simply old, print quality
can deteriorate.
"
Ensure that the paper has been installed correctly with
the paper mark at the top.
"
Over a period of time, the printing ink from the grid on the
paper can form a film on the thermal print head. Clean
the thermal print head with a clean cloth as described
previously.
"
If the problem persists call your local SCHILLER repre-
sentative.
No printout of interpretation
statement or measurements • Wrong setting
"
Check that the interpretation and measurement options
are enabled for the printout.
No key response,
LCD locked
• Software hang up
"
Switch off, and switch on again after a few seconds. If the
unit is still not working call your local SCHILLER repre-
sentative.