NEC NEAX2400 Troubleshooting, 4How to Replace the FCH PA-FCHACard, Chapter, ND-70185E, Page

TROUBLESHOOTING

3-B PM C-level Infinite Loop (Permanent)

[How to Replace FCH card]

1)Provide the anti-static kit.

2)Turn ON the MNT 3 switch. (make-busy-request)

3)Make sure that system message (23-W) "FCH Alternate Routing (Start)" is displayed.

4)Turn the MB key upward. (make-busy)

5)Disconnect the front cable from the FCH card with care.

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

FCH (PA-FCHA)

6) Extract the FCH card from the slot. MB

7)Set key settings on the new FCH card.

8)Turn ON the MNT 3 switch on the new FCH card. (make-busy-request)

9)Turn the MB key upward on the new FCH card.

10)Mount the new FCH card in the same slot.

11)Connect the disconnected front cable again with care.

12)Turn the MB key downward.

13)Turn OFF the MNT 3 switch. (make idle)

14)Make sure that system message (23-X) "FCH Alternate Routing (Stop)" is displayed.

	MBR
	(MNT 3)
2	Not
1
	Used
0		E C
		4
		0

MNT

6

FCH DTI

MNT 3

FCH DTI

OPE MB

MNT 3

FCH DTI

OPE

MB

MNT 3

8

Anti-static Kit

Front Cable

MBR key operation MB key operation

Cable Disconnection

	Figure 7-4 How to Replace the FCH (PA-FCHA) Card
CHAPTER 7	ND-70185 (E)
Page 150
Revision 3.0