NEC NEFAX - 691 B/W Laser Service Manual - Nec Unified Solutions, Inc.

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1.

MODIFICATIONS NOT AUTHORIZED BY 

NEC UNIFIED SOLUTIONS, INC.

NEC brand products are renowned for their high reliability. This reliability is achieved 

through high-quality design and a solid service network.

Product design is a highly complicated and delicate process where numerous mechanical, 

physical, and electrical aspects have to be taken into consideration, with the aim of arriving 

at proper tolerances and safety factors. For this reason, unauthorized modifications involve 

a high risk of degradation in performance and safety. Such modifications are therefore 

strictly prohibited. the points listed below are not exhaustive, but they illustrate the reason-

ing behind this policy.

SAFETY WARNINGS

DANGER: PROHIBITED ACTIONS

• Using any cables or power cord not specified by NEC.

• Using any fuse or thermostat not specified by NEC. Safety 

will not be assured, leading to a risk of fire and injury.

• Disabling fuse functions or bridging fuse terminals with 

wire, metal clips, solder or similar object.

• Disabling relay functions (such as wedging paper between 

relay contacts)

• Disabling safety functions (interlocks, safety circuits, etc.) 

Safety will not be assured, leading to a risk of fire and 

injury.

• Making any modification to the product unless instructed 

by NEC.

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