Mechanical Construction; Electrical Parts Layout - Kyocera KM-1620 Service Manual

1-6-3 Optical section .................................................................................................................................... 1-6-17
(1) Detaching and refitting the exposure lamp ................................................................................... 1-6-17
(2) Detaching and refitting the scanner wires .................................................................................... 1-6-18
(2-1) Detaching the scanner wires ............................................................................................... 1-6-18
(2-2) Fitting the scanner wires ...................................................................................................... 1-6-20
(3) Detaching and refitting the ISU (reference) .................................................................................. 1-6-23
(4) Detaching and refitting the laser scanner unit .............................................................................. 1-6-24
(5) Adjusting the longitudinal squareness (reference) ....................................................................... 1-6-27
(6) Adjusting magnification of the scanner in the main scanning direction ........................................ 1-6-28
(7) Adjusting magnification of the scanner in the auxiliary scanning direction ................................... 1-6-29
(8) Adjusting the scanner leading edge registration ........................................................................... 1-6-30
(9) Adjusting the scanner center line ................................................................................................. 1-6-31
(10) Adjusting the margins for scanning an original on the contact glass ............................................ 1-6-32
1-6-4 Drum section ....................................................................................................................................... 1-6-33
(1) Detaching and refitting the drum unit ............................................................................................ 1-6-33
(2) Detaching and refitting the drum separation claws ....................................................................... 1-6-34
(3) Detaching and refitting the main charger unit ............................................................................... 1-6-35
1-6-5 Developing section .............................................................................................................................. 1-6-36
(1) Detaching and refitting the developing unit .................................................................................. 1-6-36
1-6-6 Transfer section .................................................................................................................................. 1-6-37
(1) Detaching and refitting the transfer roller ..................................................................................... 1-6-37
1-6-7 Fixing section ...................................................................................................................................... 1-6-38
(1) Detaching and refitting the fixing unit ........................................................................................... 1-6-38
(2) Detaching and refitting the press roller ......................................................................................... 1-6-39
(3) Detaching and refitting the fixing heater M and S ......................................................................... 1-6-40
(4) Detaching and refitting the heat roller separation claws ............................................................... 1-6-41
(5) Detaching and refitting the heat roller ........................................................................................... 1-6-42
(6) Detaching and refitting the fixing thermostat ................................................................................ 1-6-43
(7) Detaching and refitting the fixing thermistor ................................................................................. 1-6-43
1-7 Requirements on PCB Replacement
1-7-1 Upgrading the firmware on the main PCB ............................................................................................ 1-7-1
1-7-2 Adjustment-free variable resisters (VR) ............................................................................................... 1-7-2
1-7-3 Remarks on engine PCB or main PCB replacement ............................................................................ 1-7-2

2-1 Mechanical construction

2-1-1 Paper feed section ............................................................................................................................... 2-1-1
2-1-2 Optical section ...................................................................................................................................... 2-1-4
(1) Original scanning ............................................................................................................................ 2-1-5
(2) Image printing ................................................................................................................................. 2-1-6
2-1-3 Drum section ........................................................................................................................................ 2-1-8
2-1-4 Developing section ............................................................................................................................. 2-1-10
(1) Formation of magnetic brush ........................................................................................................ 2-1-11
(2) Single component developing system .......................................................................................... 2-1-12
2-1-5 Transfer and separation sections ....................................................................................................... 2-1-13
2-1-6 Fixing section ..................................................................................................................................... 2-1-15
(1) Fixing temperature system ........................................................................................................... 2-1-16
(2) Fixing temperature control based on ambient temperature .......................................................... 2-1-16
2-1-7 Exit and switchback sections ............................................................................................................. 2-1-17
2-1-8 Duplex section .................................................................................................................................... 2-1-18
(1) Paper conveying operation in duplex copying .............................................................................. 2-1-19

2-2 Electrical Parts Layout

2-2-1 Electrical parts layout ........................................................................................................................... 2-2-1
(1) PCBs .............................................................................................................................................. 2-2-1
(2) Switches and sensors ..................................................................................................................... 2-2-2
(3) Motors ............................................................................................................................................. 2-2-3
(4) Other electrical components ........................................................................................................... 2-2-4
2C9