ocr: C64 BOARD IDENTIFICATION To date there are 4 versions of 64 PCB assemblies in use. VERSION IDENTIFYING FACTORS PCB ASSY # SCHEMATIC # Original 5 pin board 326298-01 326106 (CN5-Video port has 5 pins) Al (CR) 8 pin board 250407-04 251138 (CN5-Video port has 8 pins) B 8 pin board 250425 251469 (Reduced oscillator circuit) B-2 8 pin board 250441-01* 251469 (Reduced Osc. w/component changes) These boards are interchangeable with casework, keyboard, etc.; however, care must be taken to provide the customer with a unit that is compatible with their monitor and cable. When component level repairs are ...