B--63005EN/02
9.TROUBLESHOOTING
637
The management software for the CNC is loaded from the FROM to the
DRAM at power on, so that it is executed on the DRAM.
A parity error occurred on this DRAM.
These alarms occur if the data on the DRAM is destroyed due to some
external cause or if the DRAM module or CPU card is defective.
Replace the DRAM module installed on the CPU card.
If the above action does not solve the problem, replace the CPU card.
NOTE
This drawing shows a motherboard without a PC
(A20B --8100--014x). For motherboards with a PC
(A20B --8100--014x, A20B --8100--046x, and
A20B--8100--054x), the positions and the orientations of
the connectors and the DIMM module socket differ slightly,
but their relative positions are the same.
The DRAM module is installed on the CPU card.
CPU card
Motherboard
9.26
ALARMS 912 TO 919
(DRAM PARITY)
Causes and actions
D Replacing the DRAM
module
D Replacing the CPU card.
D Installation position of
the CPU card (DRAM
module)
[For the LCD--mounted
type]