Electrical
Troubleshooting Guide
IRB6400 M94A
Page 2 - 6
Computer System
2.3 Troubleshooting
2.3.1 General
ESD ALERT!! ESD ALERT!!
In this computer system ALL computer boards are
static sensitive.
'ESD' is Electro Static Discharge.
ESD is the charge you get from walking across a new
carpet floor and then touch an object with a different
potential.
In the case of carpeting, this voltage is very, very high.
ESD is on our bodies at ALL times. There is enough
voltage to damage computer board electronics when it
is discharged through them.
IT IS CRITICAL THAT BEFORE HANDLING ANY
COMPUTER BOARD TO PUT ON THE GROUND
STRAP THAT IS ATTACHED TO THE SWING GATE
OF THE CONTROL CABINET.
This applies to all boards in the system. If you need to
put a board down or carry it to another location put it into
the special static free bag that comes with each controller
first.
If this procedure is not followed every time a board is
handled damage WILL be done to the board even if no
apparent damage is evident.
Never remove any computer component with
power ON.
In general, when troubleshooting the system begin by:
1) Reading any error messages shown on the teach
pendant display.
2) Check the systems error log by
a) pressing MISC
b) selecting Service
c) press View
d) select Error Log
3) Check the LEDs on the front of the boards in the
system. The LEDs will indicate board failures. The
LEDs are explained later in this chapter.
4) Try restarting the system. When the system is
restarted the computer runs diagnostics that can
be helpful when troubleshooting. Also restarting
resets the system software.
5) If needed check wiring by using the circuit diagrams.
6) Remember to check for mechanical problems.
Fig. 2-1 ..............
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