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6.5.3
CMRR check .................................................................................................................................... 26
6.5.4
Checking blocking ........................................................................................................................... 26
6.5.5
Checking frequency characteristic .................................................................................................. 26
6.5.6
Checking time-constant ................................................................................................................... 27
6.5.7
Checking pacemaker detector.......................................................................................................... 28
6.5.8
Checking PACE tolerance ............................................................................................................... 28
6.5.9
Checking amplifier latch-up watcher .............................................................................................. 29
6.5.10
Noise measurement and baseline checking ................................................................................. 29
6.6
6.6.1
With printer partially connected...................................................................................................... 30
6.6.2
Print test with printer ...................................................................................................................... 30
6.6.3
Checking ECG signal ...................................................................................................................... 30
6.7
7
CARD LEVEL MEASUREMENTS - 60G&80G-L INTERFACE BOARDS..................................... 31
7.1
7.2
7.3
7.3.1
With printer partially connected...................................................................................................... 31
7.3.2
Print test with printer ...................................................................................................................... 31
8
DEVICE LEVEL MEASUREMENTS ..................................................................................................... 32
8.1
8.2
8.3
8.3.1
Safety examinations ......................................................................................................................... 33
8.3.1.1
Insulation checking..................................................................................................................................33
8.3.1.2
Leakage current measurement .................................................................................................................34
8.3.2
Sensitivity examination and DC tolerance checking ....................................................................... 34
8.3.3
Latch-up watcher check................................................................................................................... 35
8.3.4
Measuring noise on the input and baseline checking ...................................................................... 35
8.3.5
Checking time-constant ................................................................................................................... 35
8.3.6
Checking frequency transfer............................................................................................................ 36
8.3.7
Checking filter ................................................................................................................................. 36
8.3.8
Checking CMRR .............................................................................................................................. 37
8.3.9
Printing ECG signal ........................................................................................................................ 37
8.3.10
Checking PC connection ............................................................................................................. 37
8.3.11
Measuring power consumption ................................................................................................... 37
9
MAINTENANCE AND SERVICE PROCEDURES ............................................................................... 38
9.1
9.1.1
Further disassembly of the bottom part: ......................................................................................... 40
9.1.2
Further disassembly of the top part - HeartScreen 80G-L: ............................................................ 41
9.1.3
Further disassembly of the top part - HeartScreen 60G:................................................................ 43
9.2
10
POSSIBLE ERRORS AND TROUBLESHOOTING ......................................................................... 46
11
ASSEMBLY DRAWINGS..................................................................................................................... 50
11.1
11.2
11.3
12
SCHEMATICS ....................................................................................................................................... 54
12.1
12.2
12.3
12.4
12.5
12.6
12.7
2014.01.09
Heart Screen 60G-80G-L
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D-5450-1-B_HS60G80GL_SM_ENG.doc
Service manual
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