[RRL]

Tri Star CNC Services
4861 Prime Parkway
McHenry, IL 60050

Phone 815.578.9145
Fax 815.578.9153

Field Service/Machine Repair Group
2314 North Grandview Blvd.
Suite # 210
Waukesha, WI 53188

Phone 262.547.1742
Fax 262.547.1763


Email [email protected]


We specialize in FANUC & GE FANUC Repairs
We have test stands and repair stations to support the following product lines:

Controls (all sub assemblies including power supplies):
Fanuc 10/11/12
Fanuc 0 (A, B & C)
Fanuc 21 & 21i
Fanuc 16i & 18i
Fanuc 16 B & 18 B
Servo Drives:
Fanuc Alpha & Alpha i series
Fanuc AC Digital Series (S, C & D)
Fanuc DC and DCM Series
Spindle Drives:
Fanuc Alpha & Alpha i series
Fanuc AC Digital and Analog
Fanuc AC Serial Interface
Fanuc AC Series i & S

Tri Star CNC Services, LLC is an independent service organization ready to assist you with your CNC machine maintenance requirements. Our engineering staff has over 90 years of electronic control repair and/or machine tool repair.

Tri Star CNC Services, LLC operates two facilities. Our Field Service/Machine Repair Group operates out of Waukesha Wisconsin and our Controls/Electronic Repair Group has a repair facility located in McHenry Illinois.

[Suleman Khosa]

Dear Sir,

How are you?

Today I have to discuss my one machine problem in detail.

Problem: System alarm 970 NMI occurred in PMC LSI device.

Fanuc manual said replace the main board PCB.

Machine MAIN mother board with screen is A02B-0283-B500
Parts of this mother board is

A20B-3300-0280/04B Graphic card
A20B-3300-0311/08f CPU card
A20B-3300-0390/02A Servo control card
A20B-3900-0164/04A DRAM/SRAM card
A20B-8100-0661/10E Mother board PCB


I am waiting for your positive reply.

Email id: [email protected]
Skype: Sulemankhosa
Messanger yahoo: [email protected]


Thanks