Processor Pcb Fault Isolation; Fault Isolation Procedure - Toshiba strata CT Installation & Maintenance Manual

Processor PCB Fault Isolation

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To clear a "soft" fault

Fault Isolation Procedure

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Strata CT I&M Manual October 2000
2. Describe the nature of the defect on an information tag. Attach the tag to the front of the
unit with string (not wire) so the tag can remain attached during the testing and repair.
Note Return tags are available from Toshiba Information Systems UK Ltd.
The Strata CT processor PCB (B_C_U) circuits may contain a "soft" fault due to an
extremely high level of static electricity and/or improper or no System Initialisation.
If the processor is found defective during the fault finding procedures, attempt to clear a
"soft" fault before returning the processor PCB for repair.
1. Initialise the system, then re-program the system as necessary to test for the fault.
2. If the fault returns again, tag the defective processor PCB and return it for repair.
1. Test the power supply (see
power and ground per system installation section.
2. Verify that both the BATT jumper plugs on the processor PCB, are in the On position.
3. If there are feature keys, verify that they are correctly installed:
N
Strata CT: verify correct installation of the BRCS or RKYS options on the processor
PCB per the Installation chapter.
4. For the Strata CT, make sure the system power is Off. Then install an processor PCB in
the appropriate slot of the Base Cabinet:
Strata CT: If B2CBU, B3CBU or B5CBU is installed, install its partner card, B2CAU
or B3CAU in the "Bl01" slot of the Base Cabinet.
5. If B2CAU/B2CBU, B3CAU/B3CBU or B5CAU/B5CBU is installed, connect them
together with the two ribbon cables supplied per
6. Verify that all PCBs are installed in proper slots per the Configuration chapter for the
system.
7. Turn system power On; backup the customer database using DK Admin or DK Backup.
For Strata CT, verify that the heartbeat LED flashes on B1CAU, B2CAU, B3CAU or
B5CAU (B2CBU, B3CBU or B5CBU do not have heartbeat LEDs).
8. Run System Initialisation Program 91-9 (two times) per Program 91-9.
9. Run Program 03, for all option PCBs installed per Program 03.
10. Run the processor RAM tests with Program 00 (Part 2).
11. Enter the customer database (manually or with DK Admin or DK Backup) and retest for
faults.
12. After performing the above steps, tag the defective PCB(s), Power Supply, or KSU, and
return for repair.
"Testing the System's Power Supply" on Page
Chapter 2 – Strata CT
Fault Finding
2-6). Test AC
Installation.
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