Schiller AT-102, Service Handbook, Page: 74 / 140

3.12
AT-102 Service Handbook
Functional Check
Test Procedure Result
Corrective action if result not
OK
Connect unit to mains supply. Mains indicator (LED) is lit. Check mains fuse on the back panel
and replace if necessary.
If problem remains, replace main board
MK 18-1
Switch the unit on by pressing
the ON key on the keyboard.
If no ECG simulator is connected, a
short audible alarm is generated and
the lead indications in the display
are flashing..
LCD screen comes on and shows
three ECG traces and a number of
status indications.
ECG traces are barely visible
No traces visible on the LCD
screen.
Ignore or connect ECG simulator
Check power board, ECG and main
board.
Open the unit and check that the two
wire connection from the power supply
to the LCD assembly is properly
connected (high-voltage backlight). If
problem remains, replace LCD
assembly.
Check that the signal cable from the
main board to the LCD assembly is
properly connected. If problem remains,
check LCD assembly, power, ECG and
main board.
Connect an ECG simulator to
the ECG connector on the
side panel and switch ON.
Three ECG traces, heart rate,
sensitivity, time scale and status of
lead connections are shown on the
screen.
If a lead alarm is flashing, check that
the lead is properly connected
Press the MAN Start key. Six leads are printed and are of
good quality. If not, reset to default settings and try
again. Open the case and inspect all
cable assemblies and connectors.
Check printer alignment. Run printer
test (see next page).
Check / replace printer motor.
Replace main board MK 18-1.
Replace paper tray and complete
printer assembly.
Press AUTO START and wait
approximately 10 seconds for
the printout to commence.
A preprogrammed printout is
produced. If not as programmed, check all
settings. If problem remains, replace
main board MK 18-1.
Switch the unit OFF and leave
connected to the mains supply
for 10 hours or more to
charge the battery.
Disconnect the mains and
switch the unit ON. Battery symbol is shown on the LCD
screen.
Run the unit on battery power
for approximately an hour.
Unit fully operational. No
degradation. If not, check battery and replace if
necessary.
Run the unit more than 4hours
on battery power . Battery symbol does not start
flashing before 4 hours .
If the unit does run for 4 hours on
battery power it indicates a weak
battery. Replace as necessary.