GE CT-9800

GE MEDICAL SYSTEMS CT9800 QUICK SYSTEM
Rev. 14 Direction 18000
4-3-58
If the YELLOW LED remains steadily ON, this indicates the SCSI interface failed.
If both RED LED’s remain steadily ON, this indicates the + 5V from the backplane is ≤4.75Vdc.
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 4-11-1 and 4-11-2.
PRECAUTIONS:
1) 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.
2) If self test continues to fail and it is the SCSI module that is failing, be sure that both the ODD (Optical
Drive) and MDD (Winchester Drive) are powered up. Running self tests with these drives turned off will
cause failures of one or more sections of Self Tests. Also check that all cables are installed securely.
TABLE 4-11-1
ARZ MODULE ERROR CODE
CODE TEST POSSIBLE FAILURE
1 RAM TEST Data read from ram did not compare with written. RAM chips, ADR
Bus, SD Bus, RAM EN, Read or Write problem.
2 HI-SPEED BUFFER 1 Data read buffer 1 did not compare with data written. Buffer ram chips,
HS BUF EN, HS address counter, ADR Bus, SD Bus, or B0 Bus.
3 HI-SPEED BUFFER 2 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 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, SD
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 break 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 chips or 80186 not running.
11 RESERVED
12 RESERVED
13 RESERVED
14 ERROR CONDITION Data Parity or ECC error not successfully cleared. Test condition logic,
data parity logic, 9520, or FW Bus.