SERVICE MANUAL
ii
3.
Power Supply Circuit ................................................................................................ 2-4
3.1.
Configuration.............................................................................................................. 2-4
3.2.
+24V Generator.......................................................................................................... 2-5
3.3.
+5V Generator............................................................................................................ 2-5
4.
Reset Circuit............................................................................................................. 2-6
4.1.
Configuration.............................................................................................................. 2-6
5.
CBIC and Peripherals............................................................................................... 2-7
5.1.
CBIC #9 ..................................................................................................................... 2-7
5.2.
Main ROM (#12, #13) ................................................................................................. 2-7
5.3.
Main RAM (#10, #11) ................................................................................................. 2-7
5.4.
Video RAM (#7).......................................................................................................... 2-7
5.5.
Printer Driver Circuits (#2, #3, Q1 to Q4, and Q14 to Q17) ......................................... 2-7
5.6.
FDC (Floppy Disk Controller)...................................................................................... 2-7
5.7.
Clock Circuit ............................................................................................................... 2-8
5.8.
Buzzer Drive Circuit ................................................................................................... 2-8
5.9.
Country Specification Change-over ............................................................................ 2-9
5.10. RS-232C I/F Circuit .................................................................................................. 2-10
6.
Printer Control ........................................................................................................ 2-11
6.1.
Ink Jet Head Control................................................................................................. 2-11
6.2.
Carriage Motor Control ............................................................................................. 2-12
6.3.
Line Feed Motor Control ........................................................................................... 2-13
6.4.
Carriage Home Position Sensor................................................................................ 2-14
6.5.
PE Sensor ................................................................................................................ 2-14
7.
Switch PCB ............................................................................................................ 2-15
7.1.
Configuration............................................................................................................ 2-15
8.
Keyboard System ................................................................................................... 2-16
8.1.
FPC Operation ......................................................................................................... 2-16
8.2.
Keyboard Scan......................................................................................................... 2-17
8.3.
Keyboard Control Circuit........................................................................................... 2-18
9.
CRT Control ........................................................................................................... 2-20
9.1.
Configuration............................................................................................................ 2-20
9.2.
SRAM and Display Screen Relationship ................................................................... 2-21
9.2.1.
SRAM (#7) Access ..................................................................................... 2-22
9.2.2.
CRT Display Timing Chart .......................................................................... 2-23
10. FDD (Floppy Disk Drive) Control ............................................................................ 2-24
10.1. FDD Configuration.................................................................................................... 2-24
10.2. FDD Operation ......................................................................................................... 2-25
10.2.1. Basic Operation .......................................................................................... 2-25
10.2.2. Interface between CBIC (#8) and FDC (#5)................................................. 2-25
10.3. FDD Module ............................................................................................................. 2-26
Содержание DP-550CJ
Страница 15: ...THEORY SERVICE MANUAL Mechanical 1 3 Fig 1 2 General View of Printing Mechanism ...
Страница 20: ...THEORY Mechanical SERVICE MANUAL 1 8 Fig 1 7 Printer Flat Cable to Cartridge Alignment ...
Страница 21: ...THEORY SERVICE MANUAL Mechanical 1 9 Fig 1 8 Ink Jet Cartridge to Flat Cable Alignment ...
Страница 33: ...THEORY SERVICE MANUAL Mechanical 1 21 Fig 1 17 LCD Unit Installation in the Upper Cover ...
Страница 34: ...THEORY Mechanical SERVICE MANUAL 1 22 DP 525CJ LW 800ic Fig 1 18 LCD of DP 525CJ LW 800ic ...
Страница 36: ...THEORY Mechanical SERVICE MANUAL 1 24 DP 540CJ DP 550CJ LW 840ic Fig 1 20 LCD of DP 540CJ DP 550CJ LW 840ic ...
Страница 38: ...THEORY Electrical SERVICE MANUAL 2 2 Fig 2 1 Major Electronic Component Parts ...
Страница 80: ...REPAIR SERVICE MANUAL Troubleshooting 3 17 Fig 3 5 Results of Self Print Test ...
Страница 118: ...REPAIR SERVICE MANUAL Mechanical 4 3 Fig 4 2 Removing the Sub Paper Support and Paper Support ...
Страница 124: ...REPAIR SERVICE MANUAL Mechanical 4 9 Fig 4 6 Removing the LCD Unit ...
Страница 127: ...REPAIR Mechanical SERVICE MANUAL 4 12 DP 525CJ LW 800ic Fig 4 8 Removing the LCD PCB 1 ...
Страница 128: ...REPAIR SERVICE MANUAL Mechanical 4 13 DP 530CJ LW 810ic Fig 4 9 Removing the LCD PCB 2 ...
Страница 129: ...REPAIR Mechanical SERVICE MANUAL 4 14 LW 810icBL Fig 4 10 Removing the LCD PCB 3 ...
Страница 130: ...REPAIR SERVICE MANUAL Mechanical 4 15 DP 540CJ Fig 4 11 Removing the LCD PCB 4 ...
Страница 131: ...REPAIR Mechanical SERVICE MANUAL 4 16 DP 550CJ LW 840ic Fig 4 12 Removing the LCD PCB 5 ...
Страница 134: ...REPAIR SERVICE MANUAL Mechanical 4 19 Fig 4 14 Installing LCD Latch ...
Страница 139: ...REPAIR Mechanical SERVICE MANUAL 4 24 Fig 4 18 Installing the Hinge Assy ...
Страница 154: ...REPAIR SERVICE MANUAL Mechanical 4 39 Fig 4 30 Removing the Hopper Assembly ...
Страница 162: ...REPAIR SERVICE MANUAL Mechanical 4 47 Fig 4 38 Removing the Carriage ...
Страница 171: ...REPAIR Mechanical SERVICE MANUAL 4 56 Fig 4 45 Measuring Friction during Carriage Movement ...
Страница 178: ...REPAIR Mechanical SERVICE MANUAL 5 2 Fig 5 1 Carriage Assembly Lubrication Points ...
Страница 179: ...REPAIR SERVICE MANUAL Mechanical 5 3 Fig 5 2 Paper Feed Assembly Lubrication Points ...
Страница 180: ...REPAIR Mechanical SERVICE MANUAL 5 4 Fig 5 3 Eject Roller Assembly and PF Roller Assembly Lubrication Points ...
Страница 194: ...Feb 98 53T010BE1 R ...