Service manual
Performance Verification
2-2
Visual Inspection and Power On Self Test
Before beginning the inspection, press the key to put the cardiograph in
Standby mode, and unplug the power cord from the wall outlet. Inspect the cardiograph
for the following:
• Worn or damaged power cord
• Loose or missing hardware
• Mechanical damage
• Evidence of liquid spill
• Worn printer drive gear
• Worn printer roller
• Corroded or damaged reusable electrodes, if present
• Damaged patient cable
• Dirt/paper residue on the thermal printhead
• Frayed or damaged wiring
Replace any damaged or missing items, and clean the printhead and patient electrodes as
necessary. Cleaning instructions are listed under “Preventive Maintenance” later in this
chapter. Connect the cardiograph to AC power. Be sure that the AC indicator comes on.
Turn the cardiograph On and observe that the display turns on (PageWriter
200/200i/300pi) or that the LED’s flash on (PageWriter 100).
Extended Self-test
The cardiograph’s extended self-test checks each major subassembly. The extended self-
test consists of two sections: the testing of internal circuitry and the testing of printer,
display, keyboard, and modem capabilities.
To begin the extended self-test, press and hold both the and keys while
turning on the cardiograph with the key.
To stop or exit extended self-test, you must press to place the cardiograph
in Standby.
Internal Circuitry Testing of PageWriter 100
These tests are performed on the internal circuitry:
•Memory
• Gate Array
• Front-End Interface
• Serial Interface
Each of these tests is described in detail later in this chapter.
When the internal circuitry test of the PageWriter 100 is performed, the LEDs show which
test is being performed. The following table shows which LED is associated with each
test.
2Q6WDQGE\
$XWR 0DQXDO
2Q6WDQGE\
2Q6WDQGE\