GE Marquette MAC 5000

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