Oki ML521, ML520 manual Maintenance & Disassembly

Table of Contents	Page
........Head Drive Time	39
........Print Speed	40
........%Head Overheat Alarm Processing	41
....2.1.08 Power Supply Circuit	42
2.2 Mechanical Operation - Printhead Mechanism	43
........Printhead Gap Information	44
........Interconnect Diagram: Control Board to Printhead	45
........Line Feed Motor Resistance	46
........Space Motor Resistance	47
........Printhead Operation	48
........Printhead Temperature	49
....2.2.02 Spacing Mechanism	50
........Spacing Operation	51
....2.2.03 Head Gap Mechanism	52
........Ribbon Drive Operation	53
....2.2.05 Line Feed Mechanism	54
........Cut Sheet/Continuous Sheet Switching Mechanism	55
........Cut Sheet Paper Feed Operation	56
........Continuous Paper Feed (Rear Tractor Mechanism)	57
........Continuous Paper Feed (Pull Tractor Mechanism)	58
........Continuous Paper Feed (Bottom Tractor Feed	59
Mechanism)
........Continuous Paper Feed (Push/Pull Tractor Mechanism)	60
....2.2.06 Paper Detection Mechanism	61
....2.2.07 Support Protector Mechanism	62
....2.2.08 Automatic Paper Load	63
........Continuous Feed Paper	64
....2.2.09 Paper Park	65
3 Maintenance & Disassembly
....3.1.01 General Information	66
....3.1.02 Maintenance Tools	67
....3.1.03 Maintenance Precautions	68
3.2 Disassembly/Assembly Procedures	69
....3.2.01 Preliminary Items	70
....3.2.02 Printhead Assembly	71
....3.2.03 Ribbon Protector	72
....3.2.04 Gear Case Assembly	73
....3.2.05 Pull-up Roller Assembly	74
....3.2.06 Upper Cover, Access Cover, and Sheet Guide	75
Assemblies
....3.2.07 Control Board (FJIM)	76
....3.2.08 Power Supply Assembly	77
....3.2.09 Operator Panel PCB (LEOP)	78
....3.2.10 PC Connector	79