Power-Up Flow Chart; Poor Quality Ecgs - GE Marquette MAC 5000 Field Service Manual

Power-up Flow Chart

Press ON key
Sh4
3VC
Micro-Controller
*
"MOE"
Reset
Sh8 pin 5
AC Present? Sh8
No
pin 13
Battery OK? Sh8
pin 17
Yes
"MOE" enables
+3VM and +5VM
Stabilization period
No
over?

Poor Quality ECGs

Revision B
Refer to the CPU PCB schematic diagram found in the PCB Assemblies
chapter at the end of the manual.
"MOE" releases
nSysResest
Sh8 pin 10
Micro-Controller
"CURLY"
Sh2
configures FPGA
Sh2
"CURLY" reads
SmartMedia card
and moves
instruction byte
to FPGA for
Yes
"unpacking"
four bytes loaded
to FPGA?
Yes
"CURLY" asserts
WordRdy
Sh2 pin 9
Yes
FPGA puts
unpacked instruction
on StrongARM
data bus and
negates nWait
Poor quality ECGs can be caused by factors in the environment,
inadequate patient preparation, hardware failures related to the
acquisition module, leadwires, cables, or problems in the unit.
Use a simulator to obtain an ECG report. If the report is good, the
problem is external to the unit.
MAC 5000 resting ECG analysis system
2000657-002
Troubleshooting: General Fault Isolation
StrongArm
access
SmartMedia card
via FPGA and
loads remaining
code to DRAM
StrongArm
running?
Run application
software
Start-up screen
displayed
No
*
No
Yes
MD1322-017A
4-15