
B–62075E/04
5. TROUBLESHOOTING
275
Main CPU
MPG (JA3)
ENCn (JFn)
n : Axis
number
APCBAT (JA4A)
SCALEn (JF2n)
(1)
(2)*
(3)
MPG
BAT
PC
Linear scale
6V (1.5V x 4)
Pulse coder
Manual pulse generator
Fig. 5.2 (c)
(d)If AlM does not light by power on of NC, any of load connected
to (1) to (3) may be faulty. Check whether grounding or
short–circuiting exists or not. If it is present, replace the
appropriate part or cable.
(4)Short–circuiting within the controller (PCB may be faulty)
Power is supplied to PCBs through the back panel.
Check it by the steps below :
1) Remove a PCB in a slot and turn on power, then confirm lightening
of LED ALM. Repeat this operation to each PCB.
2) When ALM does not light at power on with a PCB removed, the
PCB may be faulty.
WARNING
Perform an operation with a PCB removed within 30
minutes, otherwise data in memory may be lost.