HP Designjet 1050C & 1055CM Repair PartsThe HP Designjet 1050C and the PostScript version, the Designjet 1055CM, wide format printers were originally designed to operate for 5 years without requiring service. They have many built-in self correcting features. The Designjet 1050C series of plotters are one of the best designed and built printers HP has ever produced. They produce high quality output, are fast and reliable.
At about 1 to 1.5 million cycles (cycle defined as one carriage trip across the printer) the carriage belt, trailing cable and cutter, should be replaced and the drop detector should also be cleaned or replaced at about the same interval.
The difference between the "A" version and the "B" version (Plus version) is the electronics module (Emod). The "A" models have a single unit Emod that contains the logic board, power supply, and the Ink Supply Station (ISS) board and optional Hard Disk Drive. HP no longer supplies the "A" version Emod, however, LPS provides an upgrade kit to convert the "A" Emod to the "B" Emod. The Plus version uses descrete boards and power supply units. The power supply is different only in the length of the cables which is not an issue when upgrading. The ISS board and cabling are also the same. The LPS conversion kit has custom mounting and cabling for the HDD and HDD bridge PCB. New firmware and memory is also required and are supplied in the conversion kits.
Many owners and IT people are now maintaining their Designjet 1050C and 1055CM plotters by using the resident diagnostics and by interpreting the error codes using the service manual. It is usually an easy plotter to repair.
The 1050C - 1055CM service manual can be downloaded here.