General Service Information - Epson NX Service Manual

General Service Information

This chapter provides instructions for removing and replacing the major subassemblies of the
Epson NX. The following precautions must be observed when performing any service
procedures.
disconnect all peripheral interface cables from the system unit before
removing the system unit cover. Failure to heed this warning could
expose you to an electrical shock hazard. Remove the AC power cord
only when you need to disassemble the system.
Components on the main system board can get very hot. After turning off
the computer, wait for at least 10 minutes for the components to cool
before removing the cover.
boards and disk drives in the computer are static-sensitive CMOS
devices. To prevent damage from static electricity, always discharge
body static by touching a grounded surface before opening the
computer's case. Always wear a grounded wrist strap when handling any
circuit boards or cables inside the computer. Do not touch any of the
circuit board components or connector pins with your hands, including
the gold edge connectors, as damage from static discharge and/or
contamination may result. Place circuit boards and disk drives on
anti-static rubber mats or similar anti-static surfaces when they are
removed from the computer.
Do not rock, twist, or physically stress the circuit boards while removing
them, as permanent damage may result.
Follow all instructions in the order given. Failure to do so may cause
damage to a subassembly or component.
Do not allow the speaker attached to the front of the system
chassis to come in close proximity to diskettes, hard disk drives, or other
magnetic media, as the speaker's magnetic field can cause loss of data.
Most of the components used in the manufacture of circuit
Removing and Replacing Subassemblies
3-1