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Part 1: Safety and Precautions
3.2 Static Electricity Precautions
The static charge accumulated from clothing, etc., can damage electrical components.
To discharge any built-up static electricity, touch a metallic object that is grounded. Be
sure to do this before disassembling the printer for servicing. Before discharging the
static charge, do not touch the electrical contacts on the logic board and on the carriage
ribbon cable (see Figure 1-7 ) while the carriage ribbon cable is connected to the logic
board.
3.3 Disassembly and Reassembly Precautions
The printer is comprised of a large number of plastic parts. When disassembling the
printer, take care not to break or bend plastic hooks.
CAUTION
3.4 Self-Diagnosis
The printer has a self-diagnosis feature to detect hardware defects. The results of the
self-diagnosis is indicated on the host computer's screen as an error. (The host
computer should be set in ECP or nibble mode, and uses the BJ status monitor under
Windows95/98.) For details, see Part 3: 2.1 Error Indications (page 3-15) .
Figure 1-8 Electrical System of Printer
Some plastic parts contain glass fibers for extra rigidity and precision, but
since their viscosity is low, plastic hooks can break easily when excessive
force is used. Use a precision screwdriver, and do not pull plastic hooks
with excessive force while unhooking them.
Hook
Figure 1-9 How to Release Plastic Hooks
Electrostatic Discharge!
Logic Board
AC Adapter
Never apply excessive force
when releasing a hook.
1-8
BJC-2000
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