Principles of Operation
41
Haemonetics
®
ACP-215
®
Service Manual
P/N: SM-ACP215-01-EN(AB)
System Start-up Tests
The system start-up tests are defined in the order they are executed. The
function of the test is defined, and any visual or audible signs that the test is
occurring are described. If the test fails, a visual or audible indication of failure
is described. If any system test fails, no further testing is executed.
RAM Test
At power on, the system RAM is tested for its ability to retain data. A high
frequency tone is generated during the test, which lasts approximately two
seconds. If the test fails, the tone will continuously be generated.
CPU Test
The CPU opcodes and registers are functionally tested. No indications are
given that the test is being conducted. If the test fails, the following message is
displayed:
Screen Test
The screen test is a diagnostic tool. The system cannot determine if the display
pixels are functioning properly. Instead, all display pixels are illuminated for two
seconds. During illumination, any pixels that are not lit are easily identifiable
signaling a display problem. After the pixels are illuminated, a full character set
is displayed for two seconds. A scrambled character set indicates a problem
interpreting data from the CPU.
System Tests
The system tests begin after the RAM and CPU (and display) have been
certified as fully functional. The test names are displayed in a group resembling
a chart and are listed in the order they occur. The tests displayed in the left
column are system and peripheral tests, and the tests displayed in the right
CPU OPERATION ERROR
CODE = 4
PLEASE POWER OFF
!#%&”()*+,-./0123456789:;<=>?
@ABCDEFGHIJKLMNOPQRSTUVWXYZ{\}^_
`abcdefghijklmnopqrstuvwxyz{|}~
