HP DeskJet 850C/855C Main Logic Controller Board C2642-60001 C2642-80001

Descripción

HP DeskJet 850C / 855C Main Logic Controller Board

This HP DeskJet 850C/855C series main logic controller board is identified by the white part-number label C2642-60001 and PCB silkscreen C2642-80001 Rev A. It is the printer’s main logic / formatter PCA, with a custom HP controller IC, socketed firmware ROM, DRAM and a parallel printer interface.

Identification and component markings

• Printer series: HP DeskJet 850C / 855C
• Part number on label: C2642-60001
• PCB marking: C2642-80001 Rev A
• HP ASIC marking: hp 1MM4-0001 9526307 9536 SINGAPORE
• Firmware ROM: Sharp LH53476G, marked C2642-80129 REV C/VERS.140 LH53476G 9546 D
• DRAM: OKI M548128BL-80
• PCB safety marking: KALEX 94V-0
• Approximate era: 1995

Function and interfaces

Main formatter and logic controller assembly for compatible HP DeskJet 850C/855C series inkjet printers. The board includes firmware storage, memory buffering, a parallel IEEE 1284 interface and a connector for the printer’s external DC power input. Confirm the board references, connector layout and original printer model before ordering, as similar-looking boards may not be interchangeable.

Condition

Vintage printer logic board in excellent physical condition according to the supplied inspection notes. The socketed DIP ROM is intact, parallel-port connector clips are clean, and no damage to PCB traces was noted. Supplied as one complete logic-controller board with the components described above.