GE CT-9800

GE MEDICAL SYSTEMS CT 9800 QUICK SYSTEM
Rev. 14 Direction 18000
4-3-29
The entire self-test takes approx. 1 second to execute. During execution, various LED’s will light and after the 1
second execution, all LED’s should be off. If a failure is detected, the RED LED’s will remain ON or will flash a
specific number of times to indicate what the failure is (see note below).
Note: To decode the flashing LED pattern and determine the cause of failure, follow these guidelines: The
LED’s flash two times per second. After they have flashed their code, there is a 2 second pause and the code is
repeated. Therefore, wait for the two second pause; then count the number of flashes until the next two second
pause. The number of flashes is used to look up the failing subtest (CODE) in
Tables 4-3-1 and 4-3-2.
PRECAUTION:
If self tests fail during the initial installation, be sure to reseat the controller board. Be sure it is fully seated into
the backplane connector and all Cables are securely attached.
TABLE 4-3-1
HOST MODULE ERROR CODES
CODE
TEST
POSSIBLE FAILURE
1
RAM TEST
Data read from ram did not compare with data written. RAM chips,
ADR Bus, SD Bus, RAM EN, Read or Write problem.
2
HI-SPEED BUFFER1
Data read buffer 1 did not compare with data written. Buffer ram
chips, HS BUF EN, HS Address counters, ADR Bus, SD Bus, or
BO Bus.
3
HI-SPEED BUFFER2
Data read from buffer 2 did not compare with data written. Buffer
ram chips, HS BUF EN, HS Address counter, ADR Bus, SD Bus, or
B1 Bus.
4
DONE
The done flip-flop did not set or did not clear when told to. Flip-flop,
ADR Bus, SD Bus, I/O decode, or board received a start or reset
during the test.
5
BURST COUNTER
Burst counters did not count correctly. Burst counters, ADR Bus,
AD Bus, BMC logic, or burst count latch.
6
BREAK COUNTER
Break counters did not count correctly. Break counters, ADR Bus,
SD Bus. BMC logic, or burst count latch.
7
BMC CB TEST
Data read back from BMC did not compare with data written. BMC
logic or BMC cables.
8
SECTOR TRANSFER
SIMULATION
Data read back from the BMC did not compare with data written.
BMC logic or BMC cables.
9
EEPROM
CHECKSUM
The checksum at the end of the EEPROM did not compare with the
calculated checksum.
10
DUAL PORT RAM
Data read from dual port ram B did not compare with data written to
dual port ram A. Dual port ram chjps or 80186 not running.
11
RESERVED
12
RESERVED
13
RESERVED
14
ERROR CONDITION
Data Parity or ECC error was not successfully cleared. Test
condition logic, data parity logic, 9520 or FW Bus.