Pub. 42004-463C
VoIP Speaker Amplifier Interface
Page 4 of 13
P:\Standard IOMs - Current Release\42004 Instr. Manuals\42004-463C.docx
03/20
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When servicing a circuit module, avoid carpeted areas, dry environments, and certain types of
clothing (silk, nylon, etc.) because they contribute to static build-up. Similarly, disconnect the test
probe prior to removing the ground lead.
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All electrically powered test equipment should be grounded. Apply the ground lead from the test
equipment to the circuit module before connecting the test probe.
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If a circuit module is removed from the system, it is desirable to lay it on a conductive surface (such
as a sheet of aluminum foil) which is connected to ground through 100-kilohms of resistance.
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When soldering, be sure the soldering iron is grounded and has a grounded tip.
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Prior to connecting jumpers, replacing circuit components, or touching CMOS pins (if this becomes
necessary in the replacement of an integrated circuit device), be sure to discharge any static build-up
as described in procedure 1. Since voltage differences can exist across the human body, it is
recommended that only one hand be used if it is necessary to touch pins on the CMOS device and
associated board wiring.
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When replacing a CMOS integrated circuit device, leave the device in its conductive rail container or
conductive foam until it is to be inserted into the printed circuit module.
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All low impedance test equipment (such as pulse generators, etc.) should be connected to CMOS
device inputs after power is applied to the CMOS circuitry. Similarly, such low impedance
equipment should be disconnected before power is turned off.
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Replacement modules shipped separately from the factory will be packaged in a conductive material.
Any modules being transported from one area to another should be wrapped in a similar material
(aluminum foil may be used).
Never use non-conductive material
for packaging these modules.
Important Safety Information
Install equipment without modification and according to all applicable local and national electrical codes.
Consult the National Electrical Code (NFPA 70), Canadian Standards Association (CSA 22.1), and local
codes for specific requirements regarding your installation. Class 2 circuit wiring must be performed in
accordance with the NEC.
WARNING
—
This product can contain hazardous voltages.
Always remove power to this
station and any associated equipment before beginning any installation.
CAUTION
—Do not install this equipment in areas other than those indicated on the approval
listing in the Approvals section of this manual. Such installation may cause a
safety hazard and consequent injury or property damage.
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Read, follow, and retain instructions
—All safety and operating instructions should be read and
followed before operating the unit. Retain instructions for future reference.
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Heed warnings
—Adhere to all warnings on the unit and in the operating instructions.
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Attachments
—Attachments not recommended by the product manufacturer should not be used, as
they may cause hazards.
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Servicing
—Do not attempt to service this unit by yourself. Opening or removing covers may expose
you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.
This permanently connected apparatus must have an ALL-POLE MAINS switch with a contact separation
of at least 3 mm in each pole incorporated in the electrical installation of the building.