Service manual

PageWriter 100, 200, 200i, and 300pi Series Cardiographs
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Figure 1-1 M1770A/M1771A PageWriter 300pi/200i/200 Cardiograph.
The PageWriter 100, 200, and 300 family of cardiographs print ECGs in Auto and
Manual formats. All PageWriter cardiographs use a continuous feed, high-resolution,
thermal array printer. This produces electrocardiograms on standard- size paper that can
be included in patient records without cutting or mounting. ECG reports clearly show the
ECG waveforms. The PageWriter 200 and 300 series cardiographs also annotate records
with patient information and ECG measurements. The PageWriter 200i and 300pi also
includes ECG interpretation for both adult and pediatric patients.
From a service standpoint, the PageWriter 100, 200, and 300 family of cardiographs are
similar except for two major hardware differences:
• The M1770A has additional firmware for ECG measurements and interpretation.
• The M1771A has additional firmware for ECG measurements.
• The M1772A keypanel does not have an LCD preview display and uses operational keys
instead of alphanumeric keys for user input.
All other model differences are found in the cardiograph’s software.
The PageWriter 100, 200, and 300 family of cardiographs is designed for low-cost, long-
term reliability. The modular design makes extensive use of VLSI and gate array
technology, resulting in a minimum number of subassemblies. The modular approach
means less down-time for the user, since replacing subassemblies allows faster field
repairs. The internal self-test efficiently identifies faulty subassemblies, further speeding
the repair process.