NEC NDA-24300 manual PIM Accommodating Circuit Card Replacement Procedure

UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE

3.PIM Accommodating Circuit Card Replacement Procedure

This section covers the procedures for replacing circuit cards mounted in the PIM (IMG0/1/2/3).

3.1Precaution

•Use this procedure to replace a faulty circuit card with a spare or to check a spare card.

•There are functional switches (having set the default switch) on some of the circuit cards to be re- placed. As for switch setting on the circuit cards, confirm the circuit card mounting face layout for the PIM. When a circuit card with a default switch setting is replaced with a spare card, always make the switch setting on the new circuit card the same as on the replaced card. Otherwise, electronic compo- nents on the circuit card may be destroyed, or the circuit card itself may fail to function normally.

•When handling a circuit card, always use the field service kit as countermeasures against static elec- tricity. Touching a circuit card without using the field service kit may destroy the card due to static electricity on the human body.

3.2Circuit Card Mounting Face Layout

Figure 4-18shows the face layout of the circuit cards mounted in the PIM.

PIM

Slot No.

									Universal Slots											Universal Slots
0		01	02		03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
	PWR0			PWR1		LC/TRK	LC/TRK	LC/TRK	LC/TRK	LC/TRK	LC/TRK	LC/TRK	LC/TRK	LC/TRK	MUX0	MUX1	LC/TRK	LC/TRK	LC/TRK	LC/TRK	LC/TRK	LC/TRK	LC/TRK	LC/TRK	LC/TRK

Note: This section also covers the procedure to replace the SDT (PA-SDTA/PA-SDTB) card. The card can be mounted in any of the universal slots (Slots 04-12 or 15-23).

Figure 4-18 Circuit Card Mounting Face Layout of PIM

WARNING

Improper key operations may result in a system down. Operate the keys with extreme care.

During replacement of a circuit card, the system issues system messages and activates the related alarm. Reset the indicated alarm after completing the replacement procedure.

If the indicated alarm is cleared via the RALM command, the system also clears the whole contents of the system message. Before using the RALM command, print the messages using the DFTD command.

Use the ALM RST button only to reset the alarm lamps.

NDA-24300CHAPTER 4

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