Ricoh A 1027, A 1022 Service Manual
RICOH GROUP COMPANIES
B022/B027
SERVICE MANUAL
001197MIU
®
®
SERVICE MANUAL
B022/B027
RICOH GROUP COMPANIES
B022/B027
SERVICE MANUAL
001197MIU
It is the reader's responsibility when discussing the information contained
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interest of Ricoh Corporation and its member companies.
NO PART OF THIS DOCUMENT MAY BE REPRODUCED IN ANY
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PERMISSION OF RICOH CORPORATION.
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desktop images, used in this document are trademarks, registered
trademarks or the property of their respective companies.
They are used throughout this book in an informational or editorial fashion
only and for the benefit of such companies. No such use, or the use of
any trade name, or web site is intended to convey endorsement or other
affiliation with Ricoh products.
2001 RICOH Corporation. All rights reserved.
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WARNING
The Service Manual contains informatio
regarding service techniques, procedures,
processes and spare parts of office equipmen
distributed by Ricoh Corporation. Users of thi
manual should be either service trained o
certified by successfully completing a Rico
Technical Training Program.
Untrained and uncertified users utilizin
information contained in this service manual t
repair or modify Ricoh equipment risk persona
injury, damage to property or loss of warrant
protection.
Ricoh Corporation
LEGEND
PRODUCT CODE
B022 2212 5622AG Aficio 1022 2522
B027 2712 5627AG Aficio 1027 2527
DOCUMENTATION HISTORY
REV. NO. DATE COMMENTS
*
COMPANY
GESTETNER LANIER RICOH SAVIN
11/2001 Original Printing
B022/B027
TABLE OF CONTENTS
INSTALLATION
1 OVERALL MACHINE INFORMATION.........................................1-1
1.1 SPECIFICATIONS.................................................................................... 1-1
1.2 MACHINE CONFIGURATION.................................................................. 1-5
1.2.1 SYSTEM COMPONENTS ............................................................... 1-5
1.2.2 INSTALLABLE OPTION TABLE...................................................... 1-7
Copier options...................................................................................... 1-7
Fax option............................................................................................ 1-7
Printer/scanner options........................................................................ 1-7
1.3 PAPER PATH........................................................................................... 1-8
1.4 MECHANICAL COMPONENT LAYOUT................................................... 1-9
1.5 ELECTRICAL COMPONENT DESCRIPTIONS...................................... 1-11
1.6 DRIVE LAYOUT ..................................................................................... 1-14
1.7 COPY PROCESS...................................................................................1-15
1.7.1 OVERVIEW ................................................................................... 1-15
1.8 BOARD STRUCTURE............................................................................ 1-17
1.8.1 OVERVIEW ................................................................................... 1-17
1.8.2 CONTROLLER.............................................................................. 1-19
DETAILED SECTION DESCRIPTIONS
2 DETAILED SECTION DESCRIPTIONS........................................2-1
2.1 SCANNING............................................................................................... 2-1
2.1.1 OVERVIEW ..................................................................................... 2-1
2.1.2 SCANNER DRIVE ........................................................................... 2-2
2.1.3 ORIGINAL SIZE DETECTION IN PLATEN MODE.......................... 2-3
2.2 IMAGE PROCESSING ............................................................................. 2-5
2.2.1 OVERVIEW ..................................................................................... 2-5
2.2.2 SBU (SENSOR BOARD UNIT)........................................................ 2-6
2.2.3 AUTO IMAGE DENSITY.................................................................. 2-7
2.2.4 IPU (IMAGE PROCESSING UNIT).................................................. 2-8
Overview.............................................................................................. 2-8
Image Processing Modes..................................................................... 2-9
Image Processing Path...................................................................... 2-10
Overview............................................................................................ 2-10
SP Modes for Each Image Processing Step ...................................... 2-11
Text Mode.......................................................................................... 2-11
Photo Mode........................................................................................ 2-12
Text/Photo Mode................................................................................ 2-13
Pale Mode.......................................................................................... 2-14
Generation Copy................................................................................ 2-15
Auto Shading...................................................................................... 2-16
SM i B022/B027
Pre-Filtering........................................................................................ 2-16
Main Scan Magnification/Reduction................................................... 2-16
Mirroring for ADF Mode...................................................................... 2-16
Characteristic Detection..................................................................... 2-17
Filtering .............................................................................................. 2-17
Overview............................................................................................ 2-17
MTF Filter........................................................................................... 2-17
Smoothing Filter................................................................................. 2-17
Characteristic Filter............................................................................ 2-17
Independent Dot Erase...................................................................... 2-18
Background Erase.............................................................................. 2-18
ID Gamma (γ) Correction ................................................................... 2-18
Gradation Processing......................................................................... 2-18
Overview............................................................................................ 2-18
Grayscale Processing........................................................................ 2-19
Binary Picture Processing.................................................................. 2-19
Error Diffusion.................................................................................... 2-19
Dithering............................................................................................. 2-19
Line width correction.......................................................................... 2-19
2.2.5 VIDEO CONTROL UNIT (VCU)..................................................... 2-20
Fine Character and Image (FCI)........................................................ 2-20
2.3 LASER EXPOSURE............................................................................... 2-21
2.3.1 OVERVIEW ................................................................................... 2-21
2.3.2 AUTO POWER CONTROL (APC) ................................................. 2-22
2.3.3 LD SAFETY SWITCH.................................................................... 2-23
2.4 PHOTOCONDUCTOR UNIT (PCU)........................................................ 2-24
2.4.1 OVERVIEW ................................................................................... 2-24
2.4.2 DRIVE............................................................................................ 2-25
2.4.3 NEW PCU DETECTION................................................................ 2-26
2.5 DRUM CHARGE..................................................................................... 2-27
2.5.1 OVERVIEW ................................................................................... 2-27
2.5.1 CHARGE ROLLER VOLTAGE CORRECTION............................. 2-28
Correction for Environmental Conditions............................................ 2-28
2.5.2 ID SENSOR PATTERN PRODUCTION TIMING........................... 2-29
2.5.3 DRUM CHARGE ROLLER CLEANING......................................... 2-30
2.6 DEVELOPMENT..................................................................................... 2-31
2.6.1 OVERVIEW ................................................................................... 2-31
2.6.2 DRIVE............................................................................................ 2-32
2.6.3 DEVELOPER MIXING................................................................... 2-33
2.6.4 DEVELOPMENT BIAS................................................................... 2-34
2.6.5 TONER SUPPLY........................................................................... 2-35
Toner bottle replenishment mechanism............................................. 2-35
Toner supply mechanism................................................................... 2-36
2.6.6 TONER DENSITY CONTROL....................................................... 2-37
Overview............................................................................................ 2-37
Toner density sensor initial setting..................................................... 2-39
Toner density measurement .............................................................. 2-39
Vsp/Vsg detection.............................................................................. 2-39
Toner supply reference voltage (Vref) determination......................... 2-39
B022/B027 ii SM
Toner supply determination................................................................ 2-39
Toner Supply Motor On Time Determinations.................................... 2-40
2.6.7 TONER SUPPLY IN ABNORMAL SENSOR CONDITIONS.......... 2-41
ID sensor............................................................................................ 2-41
TD Sensor.......................................................................................... 2-41
2.6.8 TONER NEAR END/END DETECTION AND RECOVERY........... 2-41
Toner Near End Detection ................................................................. 2-41
Toner Near End Recovery.................................................................. 2-42
Toner End Detection.......................................................................... 2-42
Toner End Recovery.......................................................................... 2-42
2.7 DRUM CLEANING AND TONER RECYCLING...................................... 2-43
2.7.1 DRUM CLEANING......................................................................... 2-43
2.7.2 TONER RECYCLING .................................................................... 2-44
2.8 PAPER FEED......................................................................................... 2-45
2.8.1 OVERVIEW ................................................................................... 2-45
2.8.2 PAPER FEED DRIVE MECHANISM ............................................. 2-46
2.8.3 PAPER FEED AND SEPARATION MECHANISM......................... 2-47
2.8.4 PAPER LIFT MECHANISM............................................................ 2-48
2.8.5 PAPER END DETECTION............................................................. 2-49
2.8.6 PAPER HEIGHT DETECTION....................................................... 2-50
2.8.7 FEED PRESSURE ADJUSTMENT FOR PAPER SIZE................. 2-51
Overview............................................................................................ 2-51
Paper Size Thresholds....................................................................... 2-51
Feed Pressure Adjustment................................................................. 2-52
Effect of the Amount of Remaining Paper.......................................... 2-52
From tray full to paper near-end......................................................... 2-52
From paper near end to paper end.................................................... 2-53
2.8.8 PAPER SIZE DETECTION............................................................ 2-54
2.8.9 SPECIAL PAPER SETTING.......................................................... 2-55
2.8.10 SIDE AND END FENCES............................................................ 2-56
Side Fences....................................................................................... 2-56
End Fence.......................................................................................... 2-56
2.8.11 PAPER REGISTRATION............................................................. 2-57
2.9 IMAGE TRANSFER AND PAPER SEPARATION.................................. 2-58
2.9.1 OVERVIEW ................................................................................... 2-58
2.9.2 IMAGE TRANSFER CURRENT TIMING....................................... 2-59
2.9.3 TRANSFER ROLLER CLEANING................................................. 2-60
2.9.4 PAPER SEPARATION MECHANISM............................................ 2-60
2.10 IMAGE FUSING AND PAPER EXIT..................................................... 2-61
2.10.1 OVERVIEW ................................................................................. 2-61
2.10.2 FUSING DRIVE AND RELEASE MECHANISM........................... 2-62
2.10.3 FUSING ENTRANCE GUIDE SHIFT MECHANISM.................... 2-63
2.10.4 PRESSURE ROLLER.................................................................. 2-64
2.10.5 CLEANING MECHANISM............................................................ 2-64
2.10.6 FUSING TEMPERATURE CONTROL......................................... 2-65
Temperature Control.......................................................................... 2-65
Fusing Lamp Control.......................................................................... 2-66
2.10.7 OVERHEAT PROTECTION......................................................... 2-67
2.10.8 PAPER EXIT................................................................................ 2-67
SM iii B022/B027
2.11 ENERGY SAVER MODES ................................................................... 2-68
2.11.1 OVERVIEW ................................................................................. 2-68
2.11.2 ENERGY SAVER MODE............................................................. 2-69
Entering the energy saver mode........................................................ 2-69
What happens in energy saver mode................................................. 2-69
Return to stand-by mode.................................................................... 2-69
2.11.3 AUTO OFF MODE....................................................................... 2-70
Entering off stand-by and off modes .................................................. 2-70
Off Stand-by mode............................................................................. 2-70
Off Mode............................................................................................ 2-70
Returning to stand-by mode............................................................... 2-70
INSTALLATION PROCEDURE
3 INSTALLATION PROCEDURE.................................................... 3-1
3.1 INSTALLATION REQUIREMENTS .......................................................... 3-1
3.1.1 ENVIRONMENT .............................................................................. 3-1
3.1.2 MACHINE LEVEL............................................................................ 3-1
3.1.3 MINIMUM SPACE REQUIREMENTS.............................................. 3-2
3.1.4 POWER REQUIREMENTS.............................................................. 3-3
3.2 COPIER INSTALLATION.......................................................................... 3-4
3.2.1 POWER SOCKETS FOR PERIPHERALS....................................... 3-4
3.2.2 INSTALLATION FLOW CHART....................................................... 3-5
3.2.3 ACCESSORY CHECK..................................................................... 3-6
3.2.4 INSTALLATION PROCEDURE........................................................ 3-7
3.3 PAPER TRAY UNIT INSTALLATION..................................................... 3-11
3.3.1 ACCESSORY CHECK................................................................... 3-11
3.3.2 INSTALLATION PROCEDURE...................................................... 3-11
3.4 LCT INSTALLATION .............................................................................. 3-14
3.4.1 ACCESSORY CHECK................................................................... 3-14
3.4.2 INSTALLATION PROCEDURE...................................................... 3-14
3.5 AUTO REVERSE DOCUMENT FEEDER INSTALLATION.................... 3-17
3.5.1 ACCESSORY CHECK................................................................... 3-17
3.5.2 INSTALLATION PROCEDURE...................................................... 3-17
3.6 INTERCHANGE UNIT INSTALLATION.................................................. 3-20
3.6.1 COMPONENT CHECK.................................................................. 3-20
3.6.2 INSTALLATION PROCEDURE...................................................... 3-21
3.7 1-BIN TRAY UNIT INSTALLATION ........................................................ 3-23
3.7.1 COMPONENT CHECK.................................................................. 3-23
3.7.2 INSTALLATION PROCEDURE...................................................... 3-23
3.8 SHIFT TRAY........................................................................................... 3-26
3.8.1 COMPONENT CHECK.................................................................. 3-26
3.8.2 INSTALLATION PROCEDURE...................................................... 3-26
3.9 BY-PASS FEED UNIT INSTALLATION.................................................. 3-28
3.9.1 COMPONENTS CHECK................................................................ 3-28
3.9.2 INSTALLATION PROCEDURE...................................................... 3-28
3.10 DUPLEX UNIT INSTALLATION............................................................ 3-30
3.10.1 ACCESSORY CHECK................................................................. 3-30
B022/B027 iv SM
3.10.2 INSTALLATION PROCEDURE.................................................... 3-31
3.11 BRIDGE UNIT INSTALLATION............................................................ 3-33
3.11.1 ACCESSORY CHECK................................................................. 3-33
3.11.2 INSTALLATION PROCEDURE.................................................... 3-33
3.12 1,000-SHEET FINISHER INSTALLATION............................................ 3-35
3.12.1 ACCESSORY CHECK................................................................. 3-35
3.12.2 INSTALLATION PROCEDURE.................................................... 3-36
3.13 500-SHEET FINISHER INSTALLATION............................................... 3-39
3.13.1 ACCESSORY CHECK................................................................. 3-39
3.13.2 INSTALLATION PROCEDURE.................................................... 3-40
3.14 PLATEN COVER INSTALLATION........................................................ 3-42
3.14.1 MEMORY (G578/G579)............................................................... 3-43
3.14.2 HDD (B420)................................................................................. 3-44
3.15 KEY COUNTER INSTALLATION ......................................................... 3-46
3.16 ANTI-CONDENSATION HEATER........................................................ 3-48
3.17 TRAY HEATER..................................................................................... 3-49
3.18 TRAY HEATER (OPTIONAL PAPER TRAY UNIT).............................. 3-51
3.19 TRAY HEATER (OPTIONAL LCT) ....................................................... 3-54
SERVICE TABLES
4 SERVICE TABLES.......................................................................4-1
4.1 GENERAL CAUTION................................................................................ 4-1
4.1.1 PCU (PHOTOCONDUCTOR UNIT)................................................. 4-1
4.1.2 TRANSFER ROLLER UNIT............................................................. 4-1
4.1.3 SCANNER UNIT.............................................................................. 4-1
4.1.4 LASER UNIT.................................................................................... 4-2
4.1.5 FUSING UNIT.................................................................................. 4-2
4.1.6 PAPER FEED.................................................................................. 4-2
4.1.7 OTHERS.......................................................................................... 4-2
4.2 SERVICE PROGRAM MODE................................................................... 4-3
4.2.1 SERVICE PROGRAM MODE OPERATION.................................... 4-3
Entering and Exiting SP mode............................................................. 4-3
SP Mode Button Summary................................................................... 4-4
Switching Between SP Mode and Copy Mode for Test Printing........... 4-5
Selecting the Program Number............................................................ 4-5
4.2.2 SERVICE PROGRAM MODE TABLES........................................... 4-6
SP1-XXX: Feed.................................................................................... 4-6
SP2-XXX: Drum................................................................................. 4-16
SP4-XXX: Scanner............................................................................. 4-25
SP5-XXX: Mode................................................................................. 4-31
SP6-XXX: Peripherals........................................................................ 4-41
SP7-XXX: Data Log ........................................................................... 4-43
SP9-XXX: Debug/Testing................................................................... 4-52
4.2.3 TEST PATTERN PRINTING (SP2-902-3) ..................................... 4-53
4.2.4 INPUT CHECK............................................................................... 4-54
Main Machine Input Check (SP5-803)............................................... 4-54
ARDF Input Check (SP6-007)............................................................ 4-57
SM v B022/B027
Finisher Input Check (SP6-117)......................................................... 4-58
4.2.5 OUTPUT CHECK........................................................................... 4-60
Main Machine Output Check (SP5-804)............................................. 4-60
ARDF Output Check (SP6-008)......................................................... 4-62
Finisher Output Check (SP6-118)...................................................... 4-62
4.2.6 SMC DATA LISTS (SP5-990)........................................................ 4-63
4.2.7 MEMORY ALL CLEAR (SP5-801)................................................. 4-64
Using a Flash Memory Card............................................................... 4-64
Without Using a Flash Memory Card................................................. 4-65
4.2.8 UPLOADING/DOWNLOADING NVRAM DATA............................. 4-66
Uploading NVRAM Data (SP5-824)................................................... 4-66
Downloading NVRAM Data (SP5-825)............................................... 4-67
4.2.9 APS OUTPUT DISPLAY (SP4-301)............................................... 4-68
4.2.10 DF APS SENSOR OUTPUT DISPLAY (SP6-901)....................... 4-69
4.2.11 NIP BAND WIDTH MEASUREMENT (SP1-109)......................... 4-70
4.3 PROGRAM DOWNLOAD....................................................................... 4-71
4.4 SOFTWARE RESET .............................................................................. 4-72
4.5 SYSTEM SETTINGS AND COPY SETTING RESET............................. 4-72
4.5.1 SYSTEM SETTING RESET........................................................... 4-72
4.5.2 COPIER SETTING RESET............................................................ 4-73
4.6 USER TOOLS......................................................................................... 4-74
4.6.1 HOW TO USE UP MODE.............................................................. 4-74
UP Mode Initial Screen: User Tools/Counter Display ......................... 4-74
System Settings................................................................................. 4-74
Copier/Document Server Features..................................................... 4-75
Printer, Facsimile, Scanner Settings.................................................. 4-75
Inquiry................................................................................................ 4-75
Counter.............................................................................................. 4-76
4.7 LEDS...................................................................................................... 4-77
Controller ........................................................................................... 4-77
SBCU................................................................................................. 4-77
IPU..................................................................................................... 4-77
4.8 DIP SWITCHES...................................................................................... 4-77
Controller: DIP SW2........................................................................... 4-77
SBCU: DIP SW102 ............................................................................ 4-77
4.9 SPECIAL TOOLS AND LUBRICANTS ................................................... 4-78
4.9.1 SPECIAL TOOLS........................................................................... 4-78
4.9.2 LUBRICANTS................................................................................ 4-78
PREVENTIVE MAINTENANCE SCHEDULE
5 PREVENTIVE MAINTENANCE SCHEDULE................................5-1
5.1 PM TABLE................................................................................................ 5-1
REPLACEMENT AND ADJUSTMENT
6 REPLACEMENT AND ADJUSTMENT.........................................6-1
B022/B027 vi SM
6.1 SCANNER UNIT....................................................................................... 6-1
6.1.1 EXPOSURE GLASS........................................................................ 6-1
6.1.2 SCANNER EXTERIOR/OPERATION PANEL................................. 6-2
6.1.3 LENS BLOCK ASSEMBLY.............................................................. 6-3
6.1.4 ORIGINAL SIZE SENSORS............................................................ 6-4
6.1.5 EXPOSURE LAMP.......................................................................... 6-5
6.1.6 SCANNER MOTOR/LAMP STABILIZER......................................... 6-6
6.1.7 SCANNER WIRES........................................................................... 6-7
6.2 LASER UNIT........................................................................................... 6-10
6.2.1 CAUTION DECAL LOCATIONS.................................................... 6-10
6.2.2 LASER UNIT.................................................................................. 6-11
6.2.3 POLYGON MIRROR MOTOR....................................................... 6-12
6.2.4 LD UNIT......................................................................................... 6-12
6.2.5 LASER SYNCHRONIZATION DETECTOR................................... 6-13
6.3 PHOTOCONDUCTOR UNIT (PCU)........................................................ 6-14
6.3.1 PCU............................................................................................... 6-14
6.4 TRANSFER UNIT................................................................................... 6-15
6.4.1 TRANSFER ROLLER UNIT........................................................... 6-15
6.4.2 IMAGE DENSITY SENSOR........................................................... 6-16
6.5 FUSING/EXIT......................................................................................... 6-17
6.5.1 FUSING UNIT................................................................................ 6-17
6.5.2 THERMISTORS............................................................................. 6-17
6.5.3 THERMOFUSE.............................................................................. 6-18
6.5.4 HOT ROLLER AND FUSING LAMP.............................................. 6-20
6.5.5 PRESSURE ROLLER/CLEANING ROLLER................................. 6-21
6.5.6 PAPER EXIT SENSOR/PAPER OVERFLOW SENSOR............... 6-22
6.6 PAPER FEED......................................................................................... 6-23
6.6.1 FEED ROLLERS............................................................................ 6-23
6.6.2 PAPER END SENSOR.................................................................. 6-24
6.6.3 PAPER TRAY LIFT MOTORS....................................................... 6-25
6.6.4 REGISTRATION CLUTCH............................................................. 6-26
6.6.5 PAPER FEED CLUTCHES............................................................ 6-27
Lower Paper Feed Clutch .................................................................. 6-27
Upper Paper Feed Clutch. ................................................................. 6-27
6.6.6 RELAY CLUTCHES....................................................................... 6-28
6.6.7 PAPER SIZE DETECTOR............................................................. 6-29
6.6.8 REGISTRATION SENSOR............................................................ 6-30
6.6.9 RELAY SENSORS......................................................................... 6-31
Upper Relay Sensor........................................................................... 6-31
Lower Relay Sensor........................................................................... 6-31
6.7 PCBS AND OTHER ITEMS.................................................................... 6-32
6.7.1 CONTROLLER BOARD................................................................. 6-32
6.7.2 SBCU BOARD............................................................................... 6-33
6.7.3 POWER PACK............................................................................... 6-33
6.7.4 MAIN MOTOR................................................................................ 6-34
6.7.5 PSU ............................................................................................... 6-35
6.8 COPY ADJUSTMENTS: PRINTING/SCANNING................................... 6-36
6.8.1 PRINTING...................................................................................... 6-36
Registration - Leading Edge/Side-to-Side.......................................... 6-36
SM vii B022/B027
Blank Margin...................................................................................... 6-37
Main Scan Magnification.................................................................... 6-37
Parallelogram Image Adjustment....................................................... 6-38
6.8.2 SCANNING.................................................................................... 6-39
Registration: Platen Mode.................................................................. 6-39
Magnification...................................................................................... 6-39
Standard White Density Adjustment................................................... 6-40
6.8.3 ADF IMAGE ADJUSTMENT.......................................................... 6-41
Registration........................................................................................ 6-41
Sub Scan Magnification ..................................................................... 6-41
6.8.4 TOUCH SCREEN CALIBRATION ................................................. 6-42
TROUBLESHOOTING
7 TROUBLESHOOTING..................................................................7-1
7.1 SERVICE CALL CONDITIONS................................................................. 7-1
7.1.1 SUMMARY....................................................................................... 7-1
7.1.2 SC CODE DESCRIPTIONS............................................................. 7-2
7.2 SELF-DIAGNOSTIC MODE.................................................................... 7-12
7.2.1 SELF-DIAGNOSTIC MODE AT POWER ON................................ 7-12
7.2.2 DETAILED SELF-DIAGNOSTIC MODE........................................ 7-13
Executing Detailed Self-Diagnosis..................................................... 7-13
7.3 PAPER FEED TROUBLESHOOTING.................................................... 7-15
7.4 SKEWED IMAGE.................................................................................... 7-16
7.5 ELECTRICAL COMPONENT DEFECTS................................................ 7-17
7.5.1 SENSORS..................................................................................... 7-17
7.5.2 SWITCHES.................................................................................... 7-19
7.6 BLOWN FUSE CONDITIONS................................................................. 7-20
PAPER TRAY UNIT (A860/B390)
1 OVERALL MACHINE INFORMATION.........................................8-1
1.1 SPECIFICATIONS.................................................................................... 8-1
1.2 MECHANICAL COMPONENT LAYOUT................................................... 8-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................... 8-3
1.4 ELECTRICAL COMPONENT DESCRIPTION.......................................... 8-4
1.5 DRIVE LAYOUT ....................................................................................... 8-5
2 DETAILED DESCRIPTIONS........................................................8-6
2.1 PAPER FEED AND SEPARATION MECHANISM.................................... 8-6
2.2 PAPER LIFT MECHANISM...................................................................... 8-7
2.3 PAPER END DETECTION....................................................................... 8-9
2.4 PAPER HEIGHT DETECTION ............................................................... 8-10
2.5 PAPER SIZE DETECTION..................................................................... 8-12
2.6 SIDE AND END FENCES....................................................................... 8-13
Side Fences....................................................................................... 8-13
End Fence.......................................................................................... 8-13
B022/B027 viii SM
3 REPLACEMENT AND ADJUSTMENT....................................... 8-14
3.1 FEED ROLLER REPLACEMENT........................................................... 8-14
3.2 TRAY MAIN BOARD REPLACEMENT................................................... 8-15
3.3 TRAY MOTOR REPLACEMENT............................................................ 8-15
3.4 RELAY CLUTCH REPLACEMENT......................................................... 8-16
3.5 UPPER PAPER FEED CLUTCH REPLACEMENT ................................ 8-17
3.6 LOWER PAPER FEED CLUTCH REPLACEMENT................................ 8-18
3.7 LIFT MOTOR REPLACEMENT.............................................................. 8-19
3.8 PAPER END SENSOR REPLACEMENT............................................... 8-20
3.9 VERTICAL TRANSPORT SENSOR REPLACEMENT ........................... 8-20
3.10 PAPER SIZE SWITCH REPLACEMENT.............................................. 8-21
LCT (A862/B391)
1 OVERALL MACHINE INFORMATION.........................................9-1
1.1 SPECIFICATIONS.................................................................................... 9-1
1.2 MECHANICAL COMPONENT LAYOUT................................................... 9-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................... 9-3
1.4 ELECTRICAL COMPONENT DESCRIPTIONS........................................ 9-4
2 DETAILED SECTION DESCRIPTIONS........................................9-5
2.1 PAPER FEED........................................................................................... 9-5
2.2 REVERSE ROLLER AND PICK-UP ROLLER RELEASE......................... 9-6
2.3 TRAY LIFT................................................................................................ 9-7
2.4 NEAR END/END DETECTION................................................................. 9-8
2.5 RIGHT TRAY SIDE FENCE...................................................................... 9-9
2.6 LEFT TRAY REAR FENCE...................................................................... 9-9
2.7 RIGHT TRAY PAPER END DETECTION............................................... 9-10
3 REPLACEMENT AND ADJUSTMENT....................................... 9-11
3.1 DETACHING THE TRAY FROM THE MAINFRAME.............................. 9-11
3.2 REAR FENCE HP SENSOR................................................................... 9-11
3.3 CHANGING THE TRAY PAPER SIZE.................................................... 9-12
3.4 LEFT TRAY PAPER END SENSOR....................................................... 9-12
3.5 TRAY LIFT MOTOR................................................................................ 9-13
3.6 TRAY MOTOR........................................................................................ 9-14
3.7 PAPER FEED CLUTCH AND RELAY CLUTCH..................................... 9-15
3.8 PAPER FEED UNIT................................................................................ 9-16
3.9 UPPER LIMIT, RIGHT TRAY PAPER END,
AND RELAY SENSORS......................................................................... 9-17
3.10 REAR FENCE MOTOR ........................................................................ 9-18
3.11 PICK-UP/PAPER FEED/REVERSE ROLLERS.................................... 9-19
AUTO REVERSE DOCUMENT FEEDER (B386)
1 OVERALL MACHINE INFORMATION.......................................10-1
SM ix B022/B027
1.1 SPECIFICATIONS.................................................................................. 10-1
1.2 MECHANICAL COMPONENT LAYOUT................................................. 10-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................. 10-3
1.4 ELECTRICAL COMPONENT DESCRIPTION........................................ 10-4
1.5 DRIVE LAYOUT ..................................................................................... 10-5
2 DETAILED SECTION DESCRIPTIONS...................................... 10-6
2.1 ORIGINAL SIZE DETECTION................................................................ 10-6
2.2 MIXED ORIGINAL SIZE MODE.............................................................. 10-9
2.3 PICK-UP AND SEPARATION............................................................... 10-10
2.4 ORIGINAL TRANSPORT AND EXIT.................................................... 10-11
2.4.1 SINGLE-SIDED ORIGINALS....................................................... 10-11
2.4.2 DOUBLE-SIDED ORIGINALS...................................................... 10-12
2.4.3 ORIGINAL TRAILING EDGE SENSOR....................................... 10-13
2.5 STAMP ................................................................................................. 10-14
2.6 TIMING CHART.................................................................................... 10-15
2.7 CONDITION OF JAM DETECTION...................................................... 10-16
2.8 OVERALL ELECTRICAL CIRCUIT....................................................... 10-17
3 SERVICE TABLES................................................................... 10-18
3.1 DIP SWITCHES.................................................................................... 10-18
4 REPLACEMENT AND ADJUSTMENT..................................... 10-19
4.1 DF EXIT TABLE AND COVER ............................................................. 10-19
4.2 ORIGINAL FEED UNIT......................................................................... 10-20
4.3 LEFT COVER....................................................................................... 10-21
4.4 PICK-UP ROLLER................................................................................ 10-22
4.5 FEED BELT.......................................................................................... 10-23
4.6 SEPARATION ROLLER....................................................................... 10-24
4.7 ORIGINAL SET/ORIGINAL REVERSE SENSOR ................................ 10-25
4.8 ORIGINAL SIZE SENSOR.................................................................... 10-26
4.9 ORIGINAL FEED DRIVE...................................................................... 10-27
DF Feed Clutch................................................................................ 10-27
Pick-up Solenoid.............................................................................. 10-27
Transport Motor................................................................................ 10-27
DF Feed Motor................................................................................. 10-27
4.10 REGISTRATION SENSOR................................................................. 10-28
4.11 STAMP SOLENOID AND ORIGINAL EXIT SENSOR........................ 10-29
INTERCHANGE UNIT (B300/B416)
1 OVERALL MACHINE INFORMATION.......................................11-1
1.1 SPECIFICATIONS.................................................................................. 11-1
1.2 MECHANICAL COMPONENT LAYOUT................................................. 11-2
1.3 DRIVE LAYOUT ..................................................................................... 11-3
2 DETAILED DESCRIPTION.........................................................11-4
B022/B027 x SM
2.1 JUNCTION GATE MECHANISM............................................................ 11-4
To the Exit Tray or Bridge Unit
(for the Upper Tray on top of the Bridge Unit, or the Finisher)........... 11-4
To the 1-bin Tray................................................................................ 11-4
To the Duplex Unit ............................................................................. 11-4
3 REPLACEMENT AND ADJUSTMENT....................................... 11-5
3.1 EXIT SENSOR REPLACEMENT............................................................ 11-5
1-BIN TRAY UNIT (A898/B413)
1 OVERALL INFORMATION.........................................................12-1
1.1 SPECIFICATIONS.................................................................................. 12-1
1.2 MECHANICAL COMPONENT LAYOUT................................................. 12-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................. 12-3
1.4 ELECTRICAL COMPONENT DESCRIPTION........................................ 12-3
2 DETAILED SECTION DESCRIPTIONS...................................... 12-4
2.1 BASIC OPERATION............................................................................... 12-4
3 REPLACEMENT AND ADJUSTMENT....................................... 12-5
3.1 PAPER SENSOR REMOVAL................................................................. 12-5
SHIFT TRAY UNIT (B313/B459)
1 OVERALL MACHINE INFORMATION.......................................13-1
1.1 SPECIFICATIONS.................................................................................. 13-1
1.2 COMPONENT LAYOUT......................................................................... 13-2
2 DETAILED SECTION DESCRIPTIONS...................................... 13-3
2.1 BASIC OPERATION............................................................................... 13-3
2.2 PRIMARY MECHANISMS...................................................................... 13-4
2.2.1 TRAY SHIFT.................................................................................. 13-4
2.2.2 HALF TURN DETECTION............................................................. 13-5
3 REPLACEMENT AND ADJUSTMENT....................................... 13-6
3.1 TRAY COVER REPLACEMENT............................................................. 13-6
3.1.1 TRAY COVER REMOVAL............................................................. 13-6
3.1.2 TRAY COVER ATTACHMENT...................................................... 13-6
3.2 TRAY MOTOR AND HALF TURN SENSOR REPLACEMENT .............. 13-7
3.2.1 REPLACING THE TRAY MOTOR................................................. 13-7
3.2.2 REPLACING THE HALF TURN SENSOR:.................................... 13-7
SM xi B022/B027
BY-PASS (A899/B415)
1 OVERALL MACHINE INFORMATION.......................................14-1
1.1 SPECIFICATIONS.................................................................................. 14-1
1.2 MECHANICAL COMPONENT LAYOUT................................................. 14-1
1.3 ELECTRICAL COMPONENT LAYOUT.................................................. 14-2
1.4 ELECTRICAL COMPONENT DESCRIPTION........................................ 14-2
2 DETAILED DESCRIPTIONS...................................................... 14-3
2.1 BASIC OPERATION............................................................................... 14-3
2.2 PAPER SIZE DETECTION..................................................................... 14-4
3 REPLACEMENT AND ADJUSTMENT....................................... 14-5
3.1 PAPER FEED ROLLER/FRICTION PAD/PAPER END SENSOR.......... 14-5
3.2 PAPER SIZE SENSOR BOARD............................................................. 14-6
3.3 PAPER FEED CLUTCH.......................................................................... 14-7
DUPLEX (A896/B414)
1 OVERALL MACHINE INFORMATION.......................................15-1
1.1 SPECIFICATIONS.................................................................................. 15-1
1.2 MECHANICAL COMPONENT LAYOUT................................................. 15-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................. 15-3
1.4 ELECTRICAL COMPONENT DESCRIPTION........................................ 15-4
1.5 DRIVE LAYOUT ..................................................................................... 15-5
2 DETAILED DESCRIPTIONS...................................................... 15-6
2.1 BASIC OPERATION............................................................................... 15-6
Longer than A4 sideways/LT sideways.............................................. 15-6
Up to A4 sideways/LT sideways......................................................... 15-7
2.2 FEED IN AND EXIT MECHANISM......................................................... 15-8
When paper is fed into duplex unit:.................................................... 15-8
Inversion and Exit:.............................................................................. 15-8
3 REPLACEMENT AND ADJUSTMENT....................................... 15-9
3.1 COVER REMOVAL ................................................................................ 15-9
3.2 ENTRANCE SENSOR REPLACEMENT.............................................. 15-10
3.3 EXIT SENSOR REPLACEMENT.......................................................... 15-11
BRIDGE UNIT (A897/B417)
1 OVERALL MACHINE INFORMATION.......................................16-1
1.1 SPECIFICATIONS.................................................................................. 16-1
1.2 MECHANICAL COMPONENT LAYOUT................................................. 16-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................. 16-3
1.4 ELECTRICAL COMPONENT DESCRIPTION........................................ 16-4
B022/B027 xii SM
1.5 DRIVE LAYOUT ..................................................................................... 16-5
2 DETAILED DESCRIPTION.........................................................16-6
2.1 JUNCTION GATE MECHANISM............................................................ 16-6
3 REPLACEMENT AND ADJUSTMENT....................................... 16-7
3.1 BRIDGE UNIT DRIVE MOTOR REPLACEMENT................................... 16-7
3.2 TRAY EXIT SENSOR REPLACEMENT................................................. 16-8
3.3 RELAY SENSOR REPLACEMENT........................................................ 16-8
1,000-SHEET FINISHER (B408)
1 REPLACEMENT AND ADJUSTMENT....................................... 17-1
1.1 MAIN PCB .............................................................................................. 17-1
1.2 STAPLER UNIT...................................................................................... 17-2
1.3 MOTORS................................................................................................ 17-3
1.3.1 SHIFT MOTOR.............................................................................. 17-3
1.3.2 STAPLER MOTOR........................................................................ 17-3
1.3.3 UPPER TRANSPORT MOTOR AND EXIT MOTOR..................... 17-3
1.3.4 LOWER TRANSPORT MOTOR.................................................... 17-4
1.4 MOTORS AND SENSORS..................................................................... 17-5
1.4.1 PREPARATION............................................................................. 17-5
1.4.2 STACK HEIGHT SENSOR............................................................ 17-6
1.4.3 STAPLER TRAY PAPER SENSOR............................................... 17-6
1.4.4 LOWER TRAY LIFT MOTOR......................................................... 17-6
1.4.5 STACK FEED-OUT MOTOR......................................................... 17-7
2 TROUBLESHOOTING................................................................17-8
2.1 JAM DETECTION................................................................................... 17-8
3 SERVICE TABLES.....................................................................17-9
3.1 DIP SWITCH SETTINGS........................................................................ 17-9
4 DETAILED DESCRIPTIONS.................................................... 17-10
4.1 GENERAL LAYOUT............................................................................. 17-10
4.2 ELECTRICAL COMPONENT LAYOUT................................................ 17-11
4.3 ELECTRICAL COMPONENT DESCRIPTION...................................... 17-13
4.4 DRIVE LAYOUT ................................................................................... 17-15
4.5 JUNCTION GATES .............................................................................. 17-17
Upper tray mode.............................................................................. 17-17
Sort/stack mode............................................................................... 17-17
Staple mode..................................................................................... 17-17
4.6 UPPER TRAY....................................................................................... 17-18
4.7 LOWER TRAY UP/DOWN MECHANISMS........................................... 17-19
4.8 PAPER SHIFT MECHANISM ............................................................... 17-20
4.9 JOGGER UNIT PAPER POSITIONING MECHANISM......................... 17-21
4.10 EXIT GUIDE PLATE........................................................................... 17-22
4.11 STAPLER MECHANISM..................................................................... 17-23
SM xiii B022/B027
4.12 STAPLER UNIT MOVEMENT MECHANISM...................................... 17-24
4.13 PAPER FEED-OUT MECHANISM ..................................................... 17-25
5 OVERALL MACHINE INFORMATION..................................... 17-26
5.1 SPECIFICATIONS................................................................................ 17-26
Upper Tray....................................................................................... 17-26
Lower Tray....................................................................................... 17-26
500-SHEET FINISHER (G302/B442)
1 REPLACEMENT AND ADJUSTMENT....................................... 18-1
1.1 EXTERIOR ............................................................................................. 18-1
1.2 ENTRANCE UPPER GUIDE / PAPER EXIT UNIT................................. 18-4
1.3 ENTRANCE LOWER GUIDE.................................................................. 18-5
1.4 PAPER EXIT UNIT GEAR / PADDLE ROLLER SOLENOID.................. 18-5
1.5 STAPLER UNIT...................................................................................... 18-6
1.6 JOGGER TRAY UNIT............................................................................. 18-6
1.7 PAPER EXIT SENSOR FEELER............................................................ 18-7
1.8 MAIN MOTOR ........................................................................................ 18-7
1.9 JOGGER MOTOR.................................................................................. 18-8
1.10 CONTROL BOARD............................................................................... 18-8
1.11 OUTPUT TRAY UNIT........................................................................... 18-9
2 DETAILED DESCRIPTIONS.................................................... 18-10
2.1 OVERALL MACHINE INFORMATION.................................................. 18-10
2.1.1 COMPONENT LAYOUT.............................................................. 18-10
Mechanical component layout.......................................................... 18-10
Drive layout...................................................................................... 18-11
2.1.2 ELECTRICAL COMPONENT DESCRIPTIONS........................... 18-12
2.2 DETAILED SECTION DESCRIPTIONS................................................ 18-14
2.2.1 OUTPUT TRAY MECHANISM..................................................... 18-14
Stack height detection...................................................................... 18-14
Output tray up/down mechanism...................................................... 18-15
2.2.2 PAPER FEED.............................................................................. 18-16
Overview.......................................................................................... 18-16
Straight feed out mode..................................................................... 18-16
Shift sorting mode............................................................................ 18-17
Stapling mode.................................................................................. 18-19
2.2.3 JAM CONDITIONS...................................................................... 18-20
2.2.4 ERROR DETECTION.................................................................. 18-20
3 OVERALL MACHINE INFORMATION..................................... 18-21
3.1 SPECIFICATIONS................................................................................. 18-21
B022/B027 xiv SM
B453/B461
TABLE OF CONTENTS
INSTALLATION
1 INSTALLATION............................................................................1-1
1.1 INSTALLATION REQUIREMENTS .......................................................... 1-1
1.2 PRINTER/SCANNER INSTALLATION..................................................... 1-1
Accessory Check ................................................................................. 1-1
Printer, Printer/Scanner Controller Installation..................................... 1-2
1.3 PRINTER OPTIONS................................................................................. 1-5
1.3.1 POSTSCRIPT UNIT (B462)............................................................. 1-5
1.3.2 NIB (G335)....................................................................................... 1-6
1.3.3 IEEE1394 INTERFACE (G590) ....................................................... 1-7
1.4 CHECKING THE CONNECTIONS........................................................... 1-8
TROUBLESHOOTING
2 TROUBLESHOOTING..................................................................2-1
2.1 CONTROLLER ERRORS......................................................................... 2-1
2.2 LEDS AND TEST POINTS....................................................................... 2-1
SERVICE TABLES
3 SERVICE TABLES.......................................................................3-1
3.1 SERVICE PROGRAM MODE................................................................... 3-1
3.1.1 ENABLING AND DISABLING SERVICE PROGRAM MODE.......... 3-1
Entering the SP mode......................................................................... 3-1
Exiting the Service Mode ..................................................................... 3-1
3.2 PRINTER SERVICE MODE...................................................................... 3-2
3.2.1 SERVICE MODE TABLE................................................................. 3-2
3.2.2 SP MODES RELATED TO PRINTER CONTROLLER.................... 3-2
3.3 SCANNER SERVICE MODE.................................................................... 3-3
3.3.1 SCANNER PROGRAM MODE TABLE............................................ 3-3
3.4 FIRMWARE UPDATE PROCEDURE..................................................... 3-11
3.5 POWER-ON SELF TEST........................................................................ 3-11
3.6 SELF DIAGNOSTIC TEST..................................................................... 3-11
3.7 USER PROGRAM MODE....................................................................... 3-12
3.7.1 PRINTER USER PROGRAM MODE............................................. 3-12
3.7.2 SCANNER USER PROGRAM MODE........................................... 3-13
SM xv B022/B027
DETAILED SECTION DESCRIPTIONS
4 DETAILED SECTION DESCRIPTIONS........................................4-1
4.1 OVERVIEW .............................................................................................. 4-1
4.2 CONTROLLER FUNCTIONS ................................................................... 4-3
4.2.1 SAMPLE PRINT............................................................................... 4-3
4.2.2 LOCKED PRINT .............................................................................. 4-3
4.2.3 PAPER SOURCE SELECTION....................................................... 4-4
Tray Priority (Auto Tray Select)............................................................ 4-4
Tray Lock............................................................................................. 4-4
Manual Tray Select.............................................................................. 4-4
4.2.4 AUTO CONTINUE........................................................................... 4-5
4.2.5 PAPER OUTPUT TRAY .................................................................. 4-6
Output Tray Selected........................................................................... 4-6
4.2.6 DUPLEX PRINTING ........................................................................ 4-6
4.2.7 STAPLING....................................................................................... 4-7
4.3 SCANNER FUNCTIONS .......................................................................... 4-8
4.3.1 IMAGE PROCESSING FOR SCANNER MODE.............................. 4-8
Image Data Path.................................................................................. 4-8
4.4 NIB............................................................................................................ 4-9
4.4.1 BLOCK DIAGRAM........................................................................... 4-9
4.4.2 LED INDICATORS........................................................................... 4-9
4.5 IEEE1394 INTERFACE.......................................................................... 4-10
4.5.1 SPECIFICATIONS......................................................................... 4-10
Hardware Specification...................................................................... 4-10
System Requirements........................................................................ 4-10
4.5.2 IEEE1394....................................................................................... 4-10
4.5.3 BLOCK DIAGRAM......................................................................... 4-11
4.5.4 PIN ASSIGNMENT........................................................................ 4-11
4.5.5 REMARKS ABOUT THIS INTERFACE KIT................................... 4-12
4.5.6 TROUBLESHOOTING NOTES...................................................... 4-12
SPECIFICATIONS
SPECIFICATIONS
1 GENERAL SPECIFICATIONS..................................................................... 5-1
1.1 PRINTER............................................................................................ 5-1
1.2 SCANNER.......................................................................................... 5-3
2 SOFTWARE ACCESSORIES...................................................................... 5-4
2.1 PRINTER............................................................................................ 5-4
Printer Drivers...................................................................................... 5-4
Utility Software..................................................................................... 5-4
2.2 SCANNER.......................................................................................... 5-5
Scanner Driver..................................................................................... 5-5
Scanner Utilities................................................................................... 5-5
3 MACHINE CONFIGURATION..................................................................... 5-6
3.1 SYSTEM COMPONENTS .................................................................. 5-6
B022/B027 xvi SM
B418
TABLE OF CONTENTS
INSTALLATION
1 INSTALLATION............................................................................1-1
1.1 FAX UNIT ................................................................................................. 1-1
1.1.1 CAUTIONS...................................................................................... 1-1
1.1.2 FLOW CHART................................................................................. 1-2
1.1.3 FAX OPTION TYPE 1027 INSTALLATION ..................................... 1-3
1.2 FAX UNIT OPTIONS................................................................................ 1-6
1.2.1 G3 INTERFACE UNIT TYPE 1027 INSTALLATION........................ 1-6
1.2.2 ISDN OPTION TYPE 1027 INSTALLATION.................................... 1-9
TROUBLESHOOTING
2 TROUBLESHOOTING..................................................................2-1
2.1 ERROR CODES....................................................................................... 2-1
2.2 ERROR CODES FOR THE ISDN OPTION.............................................. 2-9
2.2.1 D-CHANNEL LAYER MANAGEMENT........................................... 2-10
2.2.2 D-CHANNEL, LAYER 1................................................................. 2-10
2.2.3 D-CHANNEL LINK LAYER............................................................ 2-10
2.2.4 D-CHANNEL NETWORK LAYER.................................................. 2-11
2.2.5 B-CHANNEL LINK LAYER............................................................. 2-11
2.2.6 B-CHANNEL NETWORK LAYER.................................................. 2-12
2.2.7 TRANSPORT LAYER.................................................................... 2-12
2.2.8 SESSION LAYER.......................................................................... 2-13
2.2.9 DOCUMENT LAYER ..................................................................... 2-14
2.2.10 PRESENTATION LAYER............................................................ 2-14
2.3 FAX SC CODES..................................................................................... 2-15
2.3.1 OVERVIEW ................................................................................... 2-15
2.3.2 SC1201.......................................................................................... 2-15
2.3.3 SC1207.......................................................................................... 2-15
2.3.4 FAX SC CODE TABLE.................................................................. 2-16
2.4 ISDN TEST FUNCTION.......................................................................... 2-17
2.4.1 LEDS ............................................................................................. 2-17
2.4.2 BACK-TO-BACK TEST.................................................................. 2-18
SERVICE TABLES
3 SERVICE TABLES.......................................................................3-1
3.1 SERVICE PROGRAM MODE................................................................... 3-1
3.1.1 SERVICE PROGRAM MODE OPERATION.................................... 3-1
Entering and Exiting SP mode............................................................. 3-1
SM xvii B022/B027
SP Mode Button Summary................................................................... 3-2
Switching Between SP Mode and Copy Mode for Test Printing........... 3-3
Selecting the Program Number............................................................ 3-3
3.1.2 SERVICE PROGRAM MODE TABLES........................................... 3-4
3.2 BIT SWITCHES........................................................................................ 3-9
3.2.1 SYSTEM SWITCHES...................................................................... 3-9
3.2.2 SCANNER SWITCHES ................................................................. 3-21
3.2.3 PRINTER SWITCHES................................................................... 3-25
3.2.4 COMMUNICATION SWITCHES.................................................... 3-30
3.2.5 G3 SWITCHES.............................................................................. 3-39
3.2.6 G3-2 SWITCHES........................................................................... 3-46
3.2.7 G4 INTERNAL SWITCHES............................................................ 3-52
3.2.8 G4 PARAMETER SWITCHES....................................................... 3-59
3.3 NCU PARAMETERS .............................................................................. 3-62
3.4 DEDICATED TRANSMISSION PARAMETERS..................................... 3-73
3.4.1 PROGRAMMING PROCEDURE................................................... 3-73
3.4.2 PARAMETERS.............................................................................. 3-74
3.5 SERVICE RAM ADDRESSES................................................................ 3-78
DETAILED SECTION DESCRIPTIONS
4 DETAILED SECTION DESCRIPTIONS........................................4-1
4.1 OVERVIEW .............................................................................................. 4-1
4.2 BOARDS................................................................................................... 4-2
4.2.1 FCU ................................................................................................. 4-2
FACE2 (Fax Application Control Engine)............................................. 4-2
FBI (FACE Bridge Interface)................................................................ 4-2
Modem (R288F-29).............................................................................. 4-2
DRAM .................................................................................................. 4-3
Memory back-up .................................................................................. 4-3
Switches............................................................................................... 4-3
4.2.2 MBU................................................................................................. 4-3
ROM..................................................................................................... 4-3
SRAM................................................................................................... 4-3
Memory back-up .................................................................................. 4-3
Switches............................................................................................... 4-3
4.2.3 NCU (US)......................................................................................... 4-4
4.2.4 NCU (EUROPE/ASIA) ..................................................................... 4-5
4.2.5 SG3 BOARD.................................................................................... 4-6
CCP (Communication Control Processor)............................................ 4-6
Flash ROM........................................................................................... 4-6
DRAM .................................................................................................. 4-6
QM coder............................................................................................. 4-6
V.34 Modem......................................................................................... 4-6
4.2.6 SIG4 BOARD................................................................................... 4-7
ICCP (ISDN Communication Control Processor)................................. 4-7
CODEC................................................................................................ 4-7
B022/B027 xviii SM
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