Brother 525CJ, drukarki
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R
WORD PROCESSOR
SERVICE MANUAL
MODEL:DP-525CJ/DP-530CJ/DP-540CJ/DP-550CJ
LW-800ic/LW-810ic/LW-810icBL/LW-840ic
REVISED EDITION
SERVICE MANUAL
CONTENTS
PART I
THEORY OF OPERATION
CHAPTER 1 MECHANICAL THEORY ....................................................................... 1-1
1. Ink Jet Printer ........................................................................................................... 1-1
1.1. Ink Jet Printer System Configuration .......................................................................... 1-2
1.2. Ink Jet Operation ........................................................................................................ 1-4
1.2.1. Paper Feed Mechanism................................................................................ 1-4
1.2.2. Carriage Assembly ....................................................................................... 1-7
1.2.3. Carriage Motion Control.............................................................................. 1-10
1.2.4. Maintenance Station Operation................................................................... 1-11
1.2.4.1. Spitting ................................................................................................. 1-12
1.2.4.2. Wiping .................................................................................................. 1-13
1.2.4.3. Capping ................................................................................................ 1-14
1.2.4.4. Purging ................................................................................................. 1-14
1.2.5. Sensors ...................................................................................................... 1-15
1.2.5.1. Carriage Home Position Sensor ............................................................ 1-15
1.2.5.2. PE Sensor ............................................................................................ 1-16
1.3. INK CHG (Ink Change) Functions ............................................................................. 1-17
1.3.1. Ink Cartridge Installation/Replacement ....................................................... 1-17
1.3.2. Automatic Print head Cleaning (Purging) .................................................... 1-17
2. Keyboard................................................................................................................ 1-18
CHAPTER 2 ELECTRICAL THEORY ........................................................................ 2-1
1. System Configuration ............................................................................................... 2-1
1.1. Main PCB (Printed Circuit Board) ............................................................................... 2-1
1.2. Switch PCB (Printed Circuit Board)............................................................................. 2-1
1.3. Keyboard FPC (Flexible Printed Circuit) ..................................................................... 2-1
1.4. FDD (Floppy Disk Drive) Module ................................................................................ 2-1
1.5. CRT Display ............................................................................................................... 2-1
2. Ink Jet Printer Configuration..................................................................................... 2-3
2.1. Ink Cartridge............................................................................................................... 2-3
2.2. Carriage Motor ........................................................................................................... 2-3
2.3. Line Feed Motor ......................................................................................................... 2-3
2.4. Carriage Home Position Sensor.................................................................................. 2-3
2.5. PE (Paper End) Sensor .............................................................................................. 2-3
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SERVICE MANUAL
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
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SERVICE MANUAL
10.3.1. Read/Write Circuit ...................................................................................... 2-26
10.3.2. Motor Drive Circuit...................................................................................... 2-26
10.3.3. Sensor Circuits ........................................................................................... 2-26
PART II
REPAIR
CHAPTER 3 TROUBLESHOOTING .......................................................................... 3-1
1. Introduction .............................................................................................................. 3-1
2. Precautions .............................................................................................................. 3-1
2.1. Personal Safety .......................................................................................................... 3-1
2.2. Handling ESD-Sensitive Parts .................................................................................... 3-1
3. Checks Before Repair .............................................................................................. 3-2
4. Checks After Repair ................................................................................................. 3-3
5. Troubleshooting Flow Charts.................................................................................... 3-4
6. Failure Analysis ........................................................................................................ 3-6
7. SELF-TESTS.......................................................................................................... 3-13
7.1. SERIAL NUMBER Input Display ............................................................................... 3-13
7.2. Self Print Mode......................................................................................................... 3-14
7.3. Self-Test Mode ......................................................................................................... 3-17
7.3.1. Display (CRT) Test ..................................................................................... 3-19
7.3.1.1. Cross Hatch Pattern Test ...................................................................... 3-20
7.3.1.2. Full Dot Screen Test ............................................................................. 3-21
7.3.1.3. Blank Screen Test ................................................................................ 3-22
7.3.1.4. H Pattern Test ...................................................................................... 3-23
7.3.1.5. mw Pattern Test.................................................................................... 3-24
7.3.1.6. Dot Pattern Test.................................................................................... 3-25
7.3.2. Print Checks ............................................................................................... 3-26
7.3.2.1. Print Test Pattern 1............................................................................... 3-26
7.3.2.2. Print Test Pattern 2............................................................................... 3-29
7.3.2.3. Dot Patterns.......................................................................................... 3-31
7.3.3. Keyboard Tests........................................................................................... 3-33
7.3.4. FDD Tests .................................................................................................. 3-36
7.3.4.1. FDD Test .............................................................................................. 3-36
7.3.4.2. Special FDD Test.................................................................................. 3-37
7.3.4.3. FDD SW Test ....................................................................................... 3-41
7.3.4.4. FDD Write Error Rate Check ................................................................ 3-42
7.3.4.5. FDD Read Error Rate Check................................................................. 3-44
7.3.5. PE (Paper-End) Sensor Test....................................................................... 3-46
7.3.6. CR (Carriage Reset) Test ........................................................................... 3-47
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SERVICE MANUAL
7.3.7. DISK TYPE ................................................................................................ 3-48
7.3.8. RS-232C Test ("Echo Back") ...................................................................... 3-49
CHAPTER 4 COMPONENT DISASSEMBLY ............................................................. 4-1
1. Covers...................................................................................................................... 4-1
1.1. Upper Cover............................................................................................................... 4-2
1.1.1. Removing the Upper Cover .......................................................................... 4-2
1.1.2. Removing the Front Cover ........................................................................... 4-6
1.1.3. Installing the Upper Cover ............................................................................ 4-7
2. Keyboard Assembly ................................................................................................. 4-8
2.1. Removing the Keyboard ............................................................................................. 4-8
2.2. Installing the Keyboard ............................................................................................... 4-9
3. Ink Jet Printer Assembly......................................................................................... 4-10
3.1. Removing the Printer Assembly ............................................................................... 4-11
3.2. Installing the Printer Assembly.................................................................................. 4-11
3.3. Disassembling the Printer Assembly......................................................................... 4-12
3.3.1. Removing the CA Unit ................................................................................ 4-13
3.3.2. Installing the CA Unit .................................................................................. 4-13
3.3.3. Disassembling the PF Unit.......................................................................... 4-14
3.3.3.1. Removing the Form .............................................................................. 4-15
3.3.3.2. Removing the Release Lever and Release Shaft .................................. 4-16
3.3.3.3. Removing the ACF Shaft Assembly ...................................................... 4-17
3.3.3.4. Removing the Pressure Rollers and Roller Holders............................... 4-18
3.3.3.5. Removing the Holder Plate ................................................................... 4-19
3.3.3.6. Removing the Hopper Assembly........................................................... 4-20
3.3.3.7. Disassembling the Paper Feed Assembly ............................................. 4-22
3.3.3.8. Removing the Eject Roller Assembly and the PF Roller Assembly........ 4-23
3.3.3.9. Removing the Motor Frame Assembly .................................................. 4-24
3.3.3.10. Removing the PF Stopper..................................................................... 4-25
3.3.3.11. Removing the PE Sensor...................................................................... 4-26
3.3.4. Disassembling the CA Unit ......................................................................... 4-27
3.3.4.1. Removing the Carriage ......................................................................... 4-28
3.3.4.2. Removing the Carriage Drive................................................................ 4-30
3.3.4.3. Removing the Star Wheel Holder Assembly ......................................... 4-31
3.3.4.4. Removing the MS Holder Assembly...................................................... 4-32
3.3.4.5. Removing the Leaf Switch (Home Position Sensor) .............................. 4-33
3.3.4.6. Removing and Mounting the KB Switch Assy........................................ 4-34
3.4. Adjusting the CA Unit ............................................................................................... 4-35
3.4.1. Adjusting the Carriage Home Position......................................................... 4-35
3.4.2. Adjusting Belt Tension ................................................................................ 4-36
iv
[ Pobierz całość w formacie PDF ]
zanotowane.pl doc.pisz.pl pdf.pisz.pl lemansa.htw.pl
R
WORD PROCESSOR
SERVICE MANUAL
MODEL:DP-525CJ/DP-530CJ/DP-540CJ/DP-550CJ
LW-800ic/LW-810ic/LW-810icBL/LW-840ic
REVISED EDITION
SERVICE MANUAL
CONTENTS
PART I
THEORY OF OPERATION
CHAPTER 1 MECHANICAL THEORY ....................................................................... 1-1
1. Ink Jet Printer ........................................................................................................... 1-1
1.1. Ink Jet Printer System Configuration .......................................................................... 1-2
1.2. Ink Jet Operation ........................................................................................................ 1-4
1.2.1. Paper Feed Mechanism................................................................................ 1-4
1.2.2. Carriage Assembly ....................................................................................... 1-7
1.2.3. Carriage Motion Control.............................................................................. 1-10
1.2.4. Maintenance Station Operation................................................................... 1-11
1.2.4.1. Spitting ................................................................................................. 1-12
1.2.4.2. Wiping .................................................................................................. 1-13
1.2.4.3. Capping ................................................................................................ 1-14
1.2.4.4. Purging ................................................................................................. 1-14
1.2.5. Sensors ...................................................................................................... 1-15
1.2.5.1. Carriage Home Position Sensor ............................................................ 1-15
1.2.5.2. PE Sensor ............................................................................................ 1-16
1.3. INK CHG (Ink Change) Functions ............................................................................. 1-17
1.3.1. Ink Cartridge Installation/Replacement ....................................................... 1-17
1.3.2. Automatic Print head Cleaning (Purging) .................................................... 1-17
2. Keyboard................................................................................................................ 1-18
CHAPTER 2 ELECTRICAL THEORY ........................................................................ 2-1
1. System Configuration ............................................................................................... 2-1
1.1. Main PCB (Printed Circuit Board) ............................................................................... 2-1
1.2. Switch PCB (Printed Circuit Board)............................................................................. 2-1
1.3. Keyboard FPC (Flexible Printed Circuit) ..................................................................... 2-1
1.4. FDD (Floppy Disk Drive) Module ................................................................................ 2-1
1.5. CRT Display ............................................................................................................... 2-1
2. Ink Jet Printer Configuration..................................................................................... 2-3
2.1. Ink Cartridge............................................................................................................... 2-3
2.2. Carriage Motor ........................................................................................................... 2-3
2.3. Line Feed Motor ......................................................................................................... 2-3
2.4. Carriage Home Position Sensor.................................................................................. 2-3
2.5. PE (Paper End) Sensor .............................................................................................. 2-3
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SERVICE MANUAL
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
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SERVICE MANUAL
10.3.1. Read/Write Circuit ...................................................................................... 2-26
10.3.2. Motor Drive Circuit...................................................................................... 2-26
10.3.3. Sensor Circuits ........................................................................................... 2-26
PART II
REPAIR
CHAPTER 3 TROUBLESHOOTING .......................................................................... 3-1
1. Introduction .............................................................................................................. 3-1
2. Precautions .............................................................................................................. 3-1
2.1. Personal Safety .......................................................................................................... 3-1
2.2. Handling ESD-Sensitive Parts .................................................................................... 3-1
3. Checks Before Repair .............................................................................................. 3-2
4. Checks After Repair ................................................................................................. 3-3
5. Troubleshooting Flow Charts.................................................................................... 3-4
6. Failure Analysis ........................................................................................................ 3-6
7. SELF-TESTS.......................................................................................................... 3-13
7.1. SERIAL NUMBER Input Display ............................................................................... 3-13
7.2. Self Print Mode......................................................................................................... 3-14
7.3. Self-Test Mode ......................................................................................................... 3-17
7.3.1. Display (CRT) Test ..................................................................................... 3-19
7.3.1.1. Cross Hatch Pattern Test ...................................................................... 3-20
7.3.1.2. Full Dot Screen Test ............................................................................. 3-21
7.3.1.3. Blank Screen Test ................................................................................ 3-22
7.3.1.4. H Pattern Test ...................................................................................... 3-23
7.3.1.5. mw Pattern Test.................................................................................... 3-24
7.3.1.6. Dot Pattern Test.................................................................................... 3-25
7.3.2. Print Checks ............................................................................................... 3-26
7.3.2.1. Print Test Pattern 1............................................................................... 3-26
7.3.2.2. Print Test Pattern 2............................................................................... 3-29
7.3.2.3. Dot Patterns.......................................................................................... 3-31
7.3.3. Keyboard Tests........................................................................................... 3-33
7.3.4. FDD Tests .................................................................................................. 3-36
7.3.4.1. FDD Test .............................................................................................. 3-36
7.3.4.2. Special FDD Test.................................................................................. 3-37
7.3.4.3. FDD SW Test ....................................................................................... 3-41
7.3.4.4. FDD Write Error Rate Check ................................................................ 3-42
7.3.4.5. FDD Read Error Rate Check................................................................. 3-44
7.3.5. PE (Paper-End) Sensor Test....................................................................... 3-46
7.3.6. CR (Carriage Reset) Test ........................................................................... 3-47
iii
SERVICE MANUAL
7.3.7. DISK TYPE ................................................................................................ 3-48
7.3.8. RS-232C Test ("Echo Back") ...................................................................... 3-49
CHAPTER 4 COMPONENT DISASSEMBLY ............................................................. 4-1
1. Covers...................................................................................................................... 4-1
1.1. Upper Cover............................................................................................................... 4-2
1.1.1. Removing the Upper Cover .......................................................................... 4-2
1.1.2. Removing the Front Cover ........................................................................... 4-6
1.1.3. Installing the Upper Cover ............................................................................ 4-7
2. Keyboard Assembly ................................................................................................. 4-8
2.1. Removing the Keyboard ............................................................................................. 4-8
2.2. Installing the Keyboard ............................................................................................... 4-9
3. Ink Jet Printer Assembly......................................................................................... 4-10
3.1. Removing the Printer Assembly ............................................................................... 4-11
3.2. Installing the Printer Assembly.................................................................................. 4-11
3.3. Disassembling the Printer Assembly......................................................................... 4-12
3.3.1. Removing the CA Unit ................................................................................ 4-13
3.3.2. Installing the CA Unit .................................................................................. 4-13
3.3.3. Disassembling the PF Unit.......................................................................... 4-14
3.3.3.1. Removing the Form .............................................................................. 4-15
3.3.3.2. Removing the Release Lever and Release Shaft .................................. 4-16
3.3.3.3. Removing the ACF Shaft Assembly ...................................................... 4-17
3.3.3.4. Removing the Pressure Rollers and Roller Holders............................... 4-18
3.3.3.5. Removing the Holder Plate ................................................................... 4-19
3.3.3.6. Removing the Hopper Assembly........................................................... 4-20
3.3.3.7. Disassembling the Paper Feed Assembly ............................................. 4-22
3.3.3.8. Removing the Eject Roller Assembly and the PF Roller Assembly........ 4-23
3.3.3.9. Removing the Motor Frame Assembly .................................................. 4-24
3.3.3.10. Removing the PF Stopper..................................................................... 4-25
3.3.3.11. Removing the PE Sensor...................................................................... 4-26
3.3.4. Disassembling the CA Unit ......................................................................... 4-27
3.3.4.1. Removing the Carriage ......................................................................... 4-28
3.3.4.2. Removing the Carriage Drive................................................................ 4-30
3.3.4.3. Removing the Star Wheel Holder Assembly ......................................... 4-31
3.3.4.4. Removing the MS Holder Assembly...................................................... 4-32
3.3.4.5. Removing the Leaf Switch (Home Position Sensor) .............................. 4-33
3.3.4.6. Removing and Mounting the KB Switch Assy........................................ 4-34
3.4. Adjusting the CA Unit ............................................................................................... 4-35
3.4.1. Adjusting the Carriage Home Position......................................................... 4-35
3.4.2. Adjusting Belt Tension ................................................................................ 4-36
iv
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