Table of Contents
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Innomed Medical
1 Contents
1
CONTENTS .................................................................................................................................................. 2
2
THE HEARTSCREEN112C-1 .................................................................................................................... 3
DEVICES' TECHNICAL PARAMETERS ............................................................................................... 4
3
3.1
DEVICES' COMPONENTS AND THEIR OPERATION ....................................................................... 7
4
4.1
4.2
4.3
4.4
4.5
4.6
Devices' summarized exploded diagrams ....................................................................................... 13
4.6.1
Devices' base exploded diagram ..................................................................................................... 14
4.6.2
4.6.3
HeartScreen112C-1 top exploded diagram ..................................................................................... 15
5
BOARD LEVEL MEASUREMENTS ...................................................................................................... 16
5.1
Checking voltages - digital circuits ................................................................................................ 16
5.1.1
Checking voltages - Analog part..................................................................................................... 16
5.1.2
5.2
V
5.2.1
Checking voltages ............................................................................................................................ 16
6
DEVICE LEVEL MEASUREMENTS ..................................................................................................... 17
6.1
6.2
6.2.1
Leakage current measurement ........................................................................................................ 18
6.2.2
Sensitivity examination and DC tolerance checking ....................................................................... 18
6.2.3
Latch-up watch check ...................................................................................................................... 19
6.2.4
Measuring noise on the input and baseline checking ...................................................................... 19
6.2.5
Checking frequency response .......................................................................................................... 20
6.2.6
Checking filter ................................................................................................................................. 21
6.2.7
Checking CMRR .............................................................................................................................. 21
6.2.8
Printing ECG signal ........................................................................................................................ 21
6.2.9
Checking PC connection ................................................................................................................. 22
7
MAINTENANCE AND SERVICE PROCEDURES ............................................................................... 22
7.1
7.1.1
Disassembly of the bottom part:Remove the battery connections. .................................................. 24
7.2
8
POSSIBLE ERRORS AND TROUBLESHOOTING ............................................................................. 26
9
ASSEMBLY DRAWINGS ......................................................................................................................... 30
9.1
9.2
10
SCHEMATICS ........................................................................................................................................... 34
10.1
10.2
10.3
Heart Screen 112C-1
............................................................................................................................... 4
..................................................................................................... 8
..................................................................................................................................... 12
................................................................................................. 13
: ............................................................................................................... 16
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: .................................................................... 7
........................................................................... 11
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Service manual
.............................................. 10
D-7443-1-C
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