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NDA-24300 CHAPTER 5
Page 377
Issue 1
FAULT REPAIR PROCEDURES
10.2 Tone Fault
Replace the TSW circuit card with a spare
and check.
When only Hold Tone is faulty
If External Hold Tone source is in
use
Check the external equipment which sends out
hold tone.
Check cross connections on the MDF. Figure 5-
21 shows a block diagram of external hold tone
supply (optional).
Replace the EMA/PLO circuit
card with a spare.
Note:
When system is 1-IMG
configuration, replace
EMA card. Otherwise,
replace PLO card.
Set the MB switch of the EMA/PLO circuit
card to UP side and extract the circuit card from
its mounting slot.
If the EMA card is removed
from the system while the
system is in operation under
the control of the CPU #1, the
system will reset and stop all
call processing. Refer to
Section 1.3.2, EMA Card
Replacement Procedure, in
Chapter 4, for detailed
instructions.
Make necessary switch settings on the new
circuit card, referring to the card extracted.
Set the MB switch of the new circuit card UP
and insert the circuit card into its mounting slot.
Set the MB switch DOWN.
Initialize the system and confirm the tone.
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
START
END
WARNING