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CHAPTER 4 NDA-24300
Page 274
Issue 1
UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
TSW Card Replacement Procedure
Use extreme care when operating the keys on the circuit card.
Figure 4-17 LEDs and Switches for TSW Changeover
WARNING
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
System Changeover. Check the following
lamp indications on the circuit cards to be
affected and ensure that they are all OFF:
• TSW ACT (TSW cards)
• OPE/MB (DLKC card) Note
• MUX ACT (MUX cards)
Note:
If the TSW card to be replaced
represents system status #0, all
the circuit cards with #0 status
are totally affected. Check the
whole cited cards' lamp
indications. (See Figure 4-16
and Figure 4-17.)
Check the following lamp indications on
the mate Speech Path block and ensure that
they are all steady-green:
• TSW ACT (TSW cards)
• OPE/MB (DLKC card)
• MUX ACT (MUX cards)
TSW ACT lamp on the TSW card remains
OFF.
A
START
Check the ACT mode of the mate
Speech Path System.
On the active GT (PH-GT09) card, set the MBR key
UP. Then, return the key DOWN.
On the TSW (PH-SW12) card to be replaced,
set the TSW MBR key UP.
MUX (PH-PC36)
MUX ACT
MB
TSW (PH-SW12)
TSW ACT
TSW MBR
MB
GT (PH-GT09)
OPE/MB
MBR
MB
DLKC (PH-PC20)
OPE/MB
MB
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