Service manual

Preventive Maintenance
2-20
Cleaning the Digital Array Printhead and Paper Sensor
If you use Hewlett-Packard recording paper, you should not have to clean the printhead
for the life of the product. If you need to clean the printhead, this is the procedure to
follow. These are the materials required:
• Foam swabs — Hewlett-Packard part number 9310-0468 or 9300-0767
• 90% Isopropyl Alcohol — Hewlett-Packard part number 8500-0559 or equivalent
• Dry, lint-free tissue — Kimwipes® or Hewlett-Packard lint-free wipes (Hewlett-Packard
part number 92193W)
To clean the printhead:
Touch the equipotential connector on the back of the cardiograph to discharge any static
electricity stored on your skin before touching the printhead. The printhead can be
damaged by static electricity.
1. From the front of the cardiograph, unlatch and open the paper door. The printhead is
to the right under the paper blade, behind the ESD brush (see Figure 2-4).
Figure 2-4 Cleaning the Digital Array Printhead.
A. Printhead
B. Paper Sensor
CAUTION