NEC NDA-24300 manual How to Clean the Connector Portion

SYSTEM MAINTENANCE OUTLINE

(4)How to clean the connector portion (gold-plated terminal):

(a)Dip the gold-plated terminal portion in the cleaning fluid for 3 to 5 seconds (only PA-XX type circuit card), as shown in Figure 2-22.

Circuit

Card

Cleaning

Fluid

Container

Figure 2-22 How to Clean the Connector Portion

Note 1: Some of the parts are subject to damage if they come in contact with the cleansing liquid. Be careful to allow only the connector portion (gold-plated terminal) to contact the cleaning liquid.

Note 2: Be sure to use fresh cleaning fluid (FREON or isopropyl alcohol).

(b)Using a soft cotton cloth, wipe both sides of the connector portion (gold-plated terminal) clean (only PA-XX type circuit card), as shown in Figure 2-23.

gauze

Gold-plated terminal

Figure 2-23 How to Clean Gold-Plated Terminal

Note 1: Use cloth (gauze, etc.) to clean.

Note 2: After wiping, be careful not to leave lint on the surface of the circuit card.

(5)When a check on the flat cable or LT cable is directed in the tree, check the following items:

(a)Make a visual check to see if the connector is properly connected.

(b)Poor connector contact may be responsible for the fault. Repeat connection and disconnection a few times, and check again to see if the connector is properly connected.

(c)Perform continuity test on the flat cable.

(6)When replacing the circuit card is directed in the tree, replace the circuit card with a spare as per Chapter 4.

(7)When multiple circuit cards appear to be faulty, before replacing them with spares, remount them (one at a time) into their slots, to determine which cards should be replaced.

NDA-24300CHAPTER 2

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