Ksu/Processor Pcb Fault Isolation; Fault Isolation Procedure - Toshiba STRATA DK14 Installation And Maintenance Manual

KSU/Processor PCB Fault Isolation

The DK14 and DK40i KSU circuits, and DK424 and DK424i processor PCB (RCTU or B_C_U)
circuits may contain a "soft" fault due to an extremely high level of static electricity and/or
improper or no System Initialization.
If the KSU or RCTU is found defective during the fault finding procedures, attempt to clear a
"soft" fault before returning the DK14 or DK40i KSU, or the DK424 or DK424i processor PCB
for repair.
➤ To clear a "soft" fault
1. Initialize the system, then re-program the system as necessary to test for the fault.
2. If the fault returns again, tag the defective KSU or processor PCB and return it for repair.

Fault Isolation Procedure

1. Test the power supply (see
and ground per system installation section.
2. Verify that the BATT jumper plug on the DK14 or DK40i Base KSU motherboard, or the
DK424 or DK424i processor PCB, is in the On position.
3. If there are feature keys, verify that they are correctly installed:
o DK14: verify that the QKYS is correctly installed per Chapter 1 – DK14 Installation.
o DK40i: verify the KKYS option installation on the K4RCU3 per Chapter 3 – DK40i
Installation.
o DK424 or DK424i: verify correct installation of the RRCS or RKYS options on the
processor PCB per the Installation chapter.
4. For the DK14 and DK40i, skip to Step 6.
For the DK424, make sure the system power is Off. Then install an processor PCB in the
appropriate slot of the Base Cabinet:
DK424: If RCTUD is installed, install RCTUC in the "R11" slot of the Base Cabinet. If
RCTUBB is installed in the "RCTU" slot, install RCTUBA in the R11 slot of the Base
Cabinet.
DK424i: If B2CBU or B3CBU is installed, install its partner card, B2CAU or B3CAU in the
"Bl01" slot of the Base Cabinet.
5. DK424: If installing RCTUBA and RCTUBB, RCTUC and RCTUD, or RCTUE and RCTUF
connect them together with the two ribbon cables supplied per
DK424i: 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 DKi Admin or DKi Backup. For
the DK424, verify that the heartbeat LED flashes on RCTUA3, RCTUBB, RCTUB, RCTUD,
RCTUE (RCTUA, RCTUBA, RCTUC and RCTUF do not have heartbeat LEDs). For
DK424i, verify that the heartbeat LED flashes on B1CAU, B2CAU, B3CAU or B5CAU
(B2CBU, B3CBU or B5CBU do not have heartbeat LEDs).
8. Run System Initialization Program 91-9 (two times) per Program 91-9.
Strata DK I&M 6/00
"Testing the System's Power Supply" on Page
Chapter 7 – DK424i
Fault Finding
KSU/Processor PCB Fault Isolation
3-6). Test AC power
Chapter 5 – DK424 Installation.
Installation.
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