Acer TravelMate 4220 TravelMate 4520/4220, Extensa 4420/4120 Service Guide - Page 65
Removing the Modem Board, Removing the Speakers, M2 x L3 BZN+NYLOK, M2 X L2 NI
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Removing the Modem Board 1. Remove the screws securing the modem board. Step 1 Type M2 x L3 BZN+NYLOK Quantity 2 Color Silver Torque 1.6 kgf-cm +/-15% 2. Remove the modem board from its system board connector (MDC1), then disconnect the modem cable from the board. Removing the Speakers 1. Remove the screws securing the speakers. Step 1 Type M2 X L2 NI Quantity 2 Color Silver Torque 1.6 kgf-cm +/-15% Chapter 3 55