Giddings & Lewis Machine Control Board 501-04302-00

A large-format CNC machine control PCB assembly silkscreened "MACHINE CONTROL BOARD," carrying part number 501-04302-00 with secondary assembly reference 503-19030-00. The date code on the board reads 6/88, placing manufacture in June 1988. The board features a densely populated layout with dual KM6264AL-10 SRAM memory ICs, multiple rows of 28-pin DIP logic devices, address and data bus routing, and IO-PASS and IO-FAIL diagnostic indicators silkscreened at the board edge. Two multi-pin gold-finger edge connectors are present, one at the left side and one at the lower left, consistent with a backplane-mounted card architecture typical of late-1980s CNC control systems. A blue ribbon connector block is also visible, along with socketed ICs throughout. The reverse side shows a through-hole solder point matrix and multilayer trace routing. No manufacturer name or logo is visible in any of the provided photos. Part number 501-04302-00 is the primary identifier as labeled on the board silkscreen. This board is suited for buyers maintaining or restoring CNC equipment that uses this specific part number or compatible machine control card assemblies from this era.

Stock # 0326-569