User's Manual

NDA-24300 CHAPTER 5
Page 381
Issue 1
FAULT REPAIR PROCEDURES
(1) Check by minimizing the system configuration
Mount only the basic circuit cards in CPU
No. 0 system and initialize.
Remove all circuit cards from CPU No. 0
system except the basic circuit cards.
Circuit cards to be mounted are as follows:
CPU, EMA, TSW, MUX
(EMA: PH-PC40, TSW: PH-SW12, MUX:
PH-PC36)
On the CPU Display Panel (DSP), set its SENSE
switch to “1.”
Press Reset (RST) button on the DSP.
CPU OPE lamp should be illuminated on the
DSP.
Initialization cannot be made. Check by replacing the basic circuit cards indi-
vidually.
Set MB switch of the circuit card UP and
extract the circuit card from its mounting
slot.
Make necessary switch settings on the new
circuit card.
Set MB switch of the new circuit card UP
and insert the circuit card into its mounting
slot.
Set MB switch DOWN.
On the DSP (CPU), set SENSE switch to “1.”
Press RST button on the DSP.
CPU OPE lamp should illuminate on the DSP.
If CPU OPE lamp of the DSP does not
illuminate, replace next circuit card and check it.
(Repeat the above steps for all basic circuit
cards.)
END