4-20 MAC™ 5000 resting ECG analysis system Revision B
2024917-010
Maintenance: Disassembly Guidelines
Printhead Replacement
Removal
1. Remove the top cover following the procedure above.
2. Using a Phillips head screw driver, remove the two screws that hold
the printhead to the printhead mounting plate.
3. Open the writer assembly, disconnect and remove the printhead.
Reassembly
1. Record the resistance value of the new printhead.
2. Connect the new printhead to the ribbon cable.
3. Hold the new printhead FIRMLY in place against the two metal tabs
on the printhead mounting plate, then tighten the two screws.
4. Replace the top cover and power up the unit.
5. Go to the Setup menu and enter the new printhead resistance value.
6. Run a Writer Test test (See Chapter 5).
Diskette Drive Removal/Replacement
1. Remove the top cover and display/keyboard assembly following the
procedures above.
2. Remove the cable from the diskette drive to the main PCB.
3. Remove two flat head screws holding the diskette drive to its
mounting brackets. Loosen, but do not remove two TORX mounting
screws holding the mounting brackets in place.
4. Detach the diskette drive and lift from the unit.
5. Apply the adhesive pad to the replacement diskette drive and
position the drive in the unit. Insert and loosely attach the two
screws.
6. The mounting screws MUST be tightened in the following order:
Tighten the two TORX mounting screws,
Next tighten the two screws holding the drive to the mounting
bracket.
Adhesive Pad
46A
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