Revision B
4-1
MAC 5000 resting ECG analysis system
2000657-002
4 Troubleshooting
Assembly Descriptions .................................................................. 3
Introduction ........................................................................................... 3
Assembly Block Diagram ....................................................................... 3
Input and Output Connectors ........................................................... 4
A Pins (J1) ............................................................................................. 4
COM1 (COM3/4) Pins (J3) ..................................................................... 4
COM2 Pins (J5) ..................................................................................... 4
ANALOG Pins (J6) ................................................................................. 5
EXT. VID. Pins (J7) ................................................................................ 5
Internal Cabling ......................................................................... 6
CPU PCB Input/Output Signals ......................................................... 8
Battery Pack/Monitor (J2) ...................................................................... 8
LCD Backlight (J4) ................................................................................. 8
Keyboard (J8) ........................................................................................ 9
LCD (J10) ............................................................................................ 10
Power Supply/Motor (J11) .................................................................. 11
Thermal Printer (J12) .......................................................................... 12
Floppy Disk Drive (J13) ....................................................................... 13
Acquisition Module (J14) ..................................................................... 13
General Fault Isolation ............................................................... 14
Visual Inspection ................................................................................. 14
Power-up Self-test ............................................................................... 14
Power-up Flow Chart ........................................................................... 15
Poor Quality ECGs ................................................................................ 15
Diagnostic Tests ....................................................................... 16
Introduction ......................................................................................... 16
Loading the System Diagnostics .......................................................... 16
System Diagnostics Main Menu ........................................................... 17
Display Diagnostics ............................................................................. 17
Pixel Verification Test .............................................................17
Grey Scale Test Patterns ........................................................17
Anti-Aliasing Test Pattern .......................................................17
Speaker Test ........................................................................................ 17
Keyboard Diagnostics .......................................................................... 18
Writer Diagnostics ............................................................................... 19
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