
www.esabna.com
DATE: March 3, 2004 BULLETIN NO: M_03_020
(Original issue date December 9, 2003)
TITLE/ PRODUCT NAME: Aristo 400 & 460 Control Board Change
RATING:
_ _ DIRECTIVE _ _ ALERT
(Action is Required) (Potential Problem)
_
(Action is Optional) (Enhanced Product)
_
(Unrestricted) (Restricted Distribution)
PRODUCT SERIES/ MODEL:
Power Source PN Old PCB New PCB
AristoMig 400 230/460/575 vac 0458 625 882 0458 842 880 0458 842 882
AristoPower 460 230/460/575 vac 0558 002 668 0486 846 884 0486 958 884
SERIAL NO:
All serial numbers
SUMMARY:
The Aristo 400 and 460 main control board has been upgraded from an 8-bit to a 16-bit
microprocessor. This change improves weld performance and adds functionality by supporting
more advanced MMC features and functions . The 8-bit control board is obsolete and replaced
by the 16-bit board. The boards can be identified by using the photo’s below. Component
positioning in the top half of the PCB is different.
X_ INFORMATION _X_ PRODUCT IMPROVEMENT
X_ General Distribution _ _ Business Confidential

OPERATIONAL IMPACT:
ACTION:
CONTACT:
The 16-bit control board is backward compatible with the 8-bit board and can be used as a
repair part for older power sources without any degradation of welding performance when
using an MA-6 MMC panel only.
CAUTION
Aristo welding systems using a U-8 MMC must
No action required.
Some caution is needed for those persons using ESAT and updating the boot programs on any
Aristo power source. The boot program for 8 and 16 bit microprocessors is different and is not
interchangeable. Do not use a 8-bit boot program on a 16-bit PCB. The reverse is also true.
ESAB Welding & Cutting Products
Product & Service Information Group
843-664-4416 Phone
843-664-5539 FAX
use the 16 bit control PCB.
CAUTION