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NDA-24300 CHAPTER 2
Page 31
Issue 1
SYSTEM MAINTENANCE OUTLINE
STEP 5 Perform the work indicated by (8), and if the result of the work is the same as the status indi-
cated, the fault is indicated by (9). If the fault repair work indicated by (9) affects another nor-
mal line, recheck the work as indicated by (10).
(b) Fault Repair Procedure
A fault repair procedure is explained by means of “TREE” format in Chapter 5. The following ex-
plains how to follow the “TREE” format and proceed with designated work. See Figure 2-25.
• Begin from START and proceed with the necessary repair work following the sequence.
• When a faulty circuit card (or circuit cards) is suspected, replace the faulty circuit card with a spare
in accordance with the work procedure pertaining to that specific circuit card.
STEP 1 Replace the circuit card indicated by (A) with a spare and check it. Perform the detailed work
as per (B). If the fault status is beyond repair, proceed to the next step.
STEP 2 If the range of the fault or the system configuration is as indicated by (C), perform a check as
indicated by (D). If the fault status is beyond repair, proceed to the next step.
STEP 3 Replace the circuit card indicated by (E) with a spare and check it. The detailed procedure in-
dicated by (G) varies with the system configuration indicated by (F).