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CHAPTER 5 NDA-24300
Page 354
Issue 1
FAULT REPAIR PROCEDURES
5.4
Speech Path System Fault - STBY Side Has Become Faulty
Faulty Situation:
• A fault occurred in the STBY side of the dual configuration system.
• [1-B] TSW Failure (Permanent)
• [1-D] TSW Write Failure
• [1-F] TSW Clock Failure
• [4-D] TSW Ready Failure
Check to see if the TSW circuit card is mak-
ing poor contact.
Set the TSW MBR switch of the TSW circuit
card UP.
Set the MB switch of the TSW circuit card UP
and extract the circuit card from its mounting
slot.
Extract the TSW circuit card from its mounting
slot and clean the contact portion.
If cleaning cannot be done, repeat insertion and
extraction of the circuit card two or three times.
Set the TSW MBR and MB switches of the
TSW circuit card UP and insert the circuit card
into its mounting slot.
Set the MB switch of the TSW circuit card
DOWN.
Set the TSW MBR switch DOWN.
Check if a station-to-station connection can be
set up.
Check PCM cables. Check the PCM cables. See Figure 5-8.
Initialize the system by pressing the START
button on the TOPU and see if a station-to-sta-
tion connection can be set up.
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
START
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