Philips as 111 service manual

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Whenthe power supply is being turned on, you may not remove this laser cautions label. If it removes, radiation of laser may be received. 2.1 ESD PROTECTION PREPARATION OF SERVICING Pickup Head consists of a laser diode that is very susceptible to external static electrocity. Although it operates properly after replacement, if it was subject to electrostatic discharge during replacement, its life might be shortened. When replacing, use a conductive mat, soldering iron with ground wire,etc. to protect the laser diode form  damage by static electricity. And also, the LSI and IC are same as above. Soldering iron with ground wire or ceramic type Ground conductive wrist strap for body. Conductive mat Theground resistance between the ground line and the ground is less than 10 1M 2-2