Patient Module And Cable Test - HP PageWriter XL M1705B Service Manual

These are the tests available in Extended Self-test:
n
Patient module and cable
n
CPU assembly
n
Printer
w Disk drive (M1700A and M1701A only)
w Preview display (M1700A only)
n
Keyboard display
H Modem and cable (Ml 700A
only)
n
All
The patient module and cable test is described in more detail in the
discussions that follow.
Note .I
!I?
Patient Module and Cable Test
This test looks for failures in the patient module and patient data
cable, and generates a test pattern in the patient module display.
If the patient module fails the test, the message Patient module
test failed. appears on the keyboard display. If the cable fails the
test, the message Patient module cable test failed. appears.
The patient module test does not test the patient electrodes or
leadwires. Test the patient electrodes and leadwires by recording
an ECG from a patient or ECG simulator as described later in this
section.
The test patterns displayed on the patient module consist of (in this
order):
n
all white cells
n
checkerboard cells
H all black cells
n
inverse checkerboard cells
n
80 characters (displayed in 5 successive groups of IG)
n
all white cells
You must observe the patient module display while the test pattern is
running to ensure:
n
accurate rendition of all patterns and characters
w no random lines or dots are displayed
Before and after the tests, asterisks appear in the display.
B-12 M1754A Signal Averaged ECG (SAECG) System