Ricoh S-C1 User manual

Model S-C1
(Machine Code: B045/B049/B044/B046)
SERVICE MANUAL
17 July, 2001
Subject to change
B046I100.WMF

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TABLE OF CONTENTS
1 INSTALLATION ........................................................................... 1-1
1.1 INSTALLATION REQUIREMENTS ...........................................................1-1
1.1.1 ENVIRONMENT ...............................................................................1-1
1.1.2 MACHINE LEVEL.............................................................................1-2
1.1.3 MINIMUM OPERATIONAL SPACE REQUIREMENTS ....................1-2
1.1.4 POWER REQUIREMENTS ..............................................................1-3
1.2 COPIER.....................................................................................................1-4
1.2.1 ACCESSORY CHECK......................................................................1-4
1.2.2 INSTALLATION PROCEDURE ........................................................1-4
Initial Programming: Faxless models (B044, B045) .............................1-8
Initial Programming: Fax-equipped models (B046, B049)....................1-8
1.3 PAPER TRAY UNIT ................................................................................1-10
1.3.1 ACCESSORY CHECK....................................................................1-10
1.3.2 INSTALLATION PROCEDURE ......................................................1-10
1.4 PAPER TRAY UNIT HEATER.................................................................1-12
1.4.1 ACCESSORY CHECK....................................................................1-12
1.4.2 INSTALLATION PROCEDURE ......................................................1-12
1.5 DOCUMENT FEEDER ............................................................................1-17
1.5.1 ACCESSORY CHECK....................................................................1-17
1.5.2 INSTALLATION PROCEDURE ......................................................1-17
1.6 DIMM.......................................................................................................1-21
1.6.1 INSTALLATION PROCEDURE ......................................................1-21
2 PREVENTIVE MAINTENANCE SCHEDULES............................. 2-1
2.1 PM TABLES ..............................................................................................2-1
2.2 HOW TO CLEAR THE PM COUNTER......................................................2-2
3 REPLACEMENT AND ADJUSTMENT......................................... 3-1
3.1 PRECAUTIONS.........................................................................................3-1
3.1.1 GENERAL ........................................................................................3-1
3.1.2 LITHIUM BATTERIES ......................................................................3-1
3.1.3 PCU (PHOTOCONDUCTOR UNIT) .................................................3-1
3.1.4 TRANSFER ROLLER.......................................................................3-1
3.1.5 SCANNER UNIT...............................................................................3-2
3.1.6 LASER UNIT ....................................................................................3-2
3.1.7 FUSING UNIT...................................................................................3-2
3.1.8 PAPER FEED...................................................................................3-2
3.1.9 IMPORTANT ....................................................................................3-3
3.2 SPECIAL TOOLS AND LUBRICANTS ......................................................3-3
3.3 EXTERIOR COVER AND OPERATION PANEL .......................................3-4
3.3.1 PLATEN COVER..............................................................................3-4
3.3.2 REAR COVER..................................................................................3-4
3.3.3 COPY TRAY.....................................................................................3-5
3.3.4 SCALE PLATE (B044 AND B045 ONLY) .........................................3-5
3.3.5 LEFT COVER ...................................................................................3-6

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3.3.6 RIGHT COVER.................................................................................3-6
3.3.7 FRONT LEFT COVER AND OPERATION PANEL ..........................3-6
3.3.8 FRONT RIGHT COVER ...................................................................3-6
3.3.9 RIGHT DOOR...................................................................................3-7
3.3.10 BYPASS TRAY (B044 AND B046 ONLY) ......................................3-7
3.3.11 PLATEN COVER SENSOR............................................................3-8
3.4 SCANNER SECTION ................................................................................3-9
3.4.1 EXPOSURE GLASS.........................................................................3-9
Non-DF machines.................................................................................3-9
DF-equipped machines.........................................................................3-9
3.4.2 LENS BLOCK .................................................................................3-10
3.4.3 EXPOSURE LAMP, LAMP STABILIZER BOARD ..........................3-10
3.4.4 SCANNER MOTOR........................................................................3-11
3.4.5 SCANNER HP SENSOR ................................................................3-11
3.4.6 SCANNER ALIGNMENT ADJUSTMENT .......................................3-12
3.5 FUSING...................................................................................................3-13
3.5.1 FUSING UNIT.................................................................................3-13
3.5.2 EXIT SENSOR ...............................................................................3-13
3.5.3 HOT ROLLER STRIPPER PAWLS ................................................3-14
3.5.4 HOT ROLLER & FUSING LAMP ....................................................3-15
3.5.5 THERMOFUSE, THERMOSWITCH, AND THERMISTOR.............3-15
3.5.6 PRESSURE ROLLER.....................................................................3-16
3.6 PCU.........................................................................................................3-17
3.7 TONER SUPPLY CLUTCH .....................................................................3-18
3.8 PAPER FEED SECTION.........................................................................3-19
3.8.1 PAPER FEED ROLLER AND FRICTION PAD...............................3-19
3.8.2 PAPER END SENSOR...................................................................3-19
3.8.3 REGISTRATION SENSOR.............................................................3-20
3.8.4 BYPASS PAPER END SENSOR (B044 AND B046 ONLY) ...........3-20
3.8.5 BYPASS FEED ROLLER (B044 AND B046 ONLY) .......................3-21
3.8.6 BYPASS FEED CLUTCH (B044 AND B046 ONLY).......................3-22
3.8.7 BYPASS FRICTION PAD (B044 AND B046 ONLY).......................3-22
3.8.8 REGISTRATION CLUTCH .............................................................3-22
3.8.9 PAPER FEED CLUTCH .................................................................3-23
3.9 IMAGE TRANSFER.................................................................................3-24
3.9.1 IMAGE TRANSFER ROLLER ........................................................3-24
3.9.2 ID (IMAGE DENSITY) SENSOR ....................................................3-24
3.9.3 DISCHARGE PLATE ......................................................................3-25
3.10 FUNCTION CONTROL UNIT (FCU) .....................................................3-25
3.11 LASER UNIT .........................................................................................3-27
3.11.1 LOCATION OF “CAUTION”DECAL ............................................3-27
3.11.2 PSU BRACKET ............................................................................3-28
3.11.3 LASER UNIT ................................................................................3-29
3.11.4 LD UNIT........................................................................................3-29
3.11.5 POLYGON MIRROR MOTOR ......................................................3-29

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3.12 OTHER REPLACEMENTS....................................................................3-30
3.12.1 QUENCHING LAMP .....................................................................3-30
3.12.2 HIGH-VOLTAGE POWER SUPPLY BOARD ...............................3-30
3.12.3 PSU ..............................................................................................3-30
3.12.4 MAIN MOTOR ..............................................................................3-31
3.12.5 EXHAUST FAN ............................................................................3-31
3.13 COPY IMAGE ADJUSTMENTS: PRINTING/SCANNING .....................3-32
3.13.1 PRINTING ....................................................................................3-32
Registration - Leading Edge/Side-to-Side...........................................3-32
Blank Margin.......................................................................................3-33
Main-Scan Magnification.....................................................................3-33
3.13.2 SCANNING...................................................................................3-34
Registration: Platen Mode...................................................................3-34
Magnification.......................................................................................3-34
Standard White Density Adjustment ...................................................3-35
3.13.3 DF IMAGE ADJUSTMENT ...........................................................3-36
Registration and Blank Margin............................................................3-36
Sub-scan Magnification.......................................................................3-36
4 TROUBLESHOOTING ................................................................. 4-1
4.1 SERVICE CALL CONDITIONS .................................................................4-1
4.1.1 SUMMARY .......................................................................................4-1
4.1.2 SC CODE DESCRIPTIONS .............................................................4-2
4.2 ELECTRICAL COMPONENT DEFECTS ..................................................4-7
4.2.1 SENSOR/SWITCH OPEN ERRORS ................................................4-7
4.3 BLOWN FUSE CONDITIONS ...................................................................4-7
4.4 DUMPING THE FUSER TEMPERATURE LOG........................................4-8
5 SERVICE TABLES....................................................................... 5-1
5.1 USING SERVICE PROGRAM MODE .......................................................5-1
Accessing SP Mode..............................................................................5-1
Accessing Copy Mode from within SP Mode ........................................5-1
How to Select a Program Number ........................................................5-2
To Input a Value or Setting ...................................................................5-2
5.1.1 SP MODE TABLES ..........................................................................5-3
SP1-XXX (Feed) ...................................................................................5-3
SP2-XXX (Drum)...................................................................................5-4
SP4-XXX (Scanner)..............................................................................5-9
SP5-XXX (Mode) ................................................................................5-14
SP6-XXX (Peripherals) .......................................................................5-18
SP7-XXX (Data Log)...........................................................................5-19
5.1.2 TEST PATTERN PRINTING (SP5-902) .........................................5-23
5.1.3 INPUT CHECK (SP5-803) ..............................................................5-24
Input Check Table...............................................................................5-24
5.1.4 OUTPUT CHECK (SP5-804) ..........................................................5-25
Input Check Table...............................................................................5-25
5.1.5 SMC PRINTING (SP5-992) ............................................................5-26
5.1.6 MEMORY ALL CLEAR (SP5-801)..................................................5-27
5.1.7 FREE RUNS...................................................................................5-28

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5.1.8 PROGRAM UPLOAD/DOWNLOAD ...............................................5-29
Program Download (SP5-827)............................................................5-29
Program Upload (SP5-826) ................................................................5-31
5.1.9 SRAM DATA UPLOAD/DOWNLOAD .............................................5-32
SRAM Data Upload (SP5-824) ...........................................................5-32
SRAM Data Download (SP5-825).......................................................5-33
5.1.10 SERIAL NUMBER INPUT (SP5-811) ...........................................5-33
5.1.11 ID SENSOR ERROR ANALYSIS (SP2-221) ................................5-34
5.1.12 MEMORY READ/WRITE ..............................................................5-35
5.2 USER TOOLS .........................................................................................5-36
5.2.1 HOW TO ENTER AND EXIT USER TOOLS ..................................5-36
5.2.2 USER TOOLS TABLE ....................................................................5-36
System Settings Table........................................................................5-36
Copy Features Table ..........................................................................5-36
6 DETAILED SECTION DESCRIPTIONS ....................................... 6-1
6.1 OVERVIEW ...............................................................................................6-1
6.1.1 COMPONENT LAYOUT ...................................................................6-1
6.2 PAPER PATH............................................................................................6-5
6.3 DRIVE LAYOUT ........................................................................................6-6
6.4 BLOCK DIAGRAM: PCBS AND COMPONENTS......................................6-7
6.5 MAIN PCBS...............................................................................................6-8
6.5.1 FCU (FUNCTION/FACSIMILE CONTROL UNIT).............................6-8
SPC2 ....................................................................................................6-9
VPL (Video Processing LSI) .................................................................6-9
CIOP (Communications and I/O Processing)........................................6-9
FROM (Flash ROM) – 2MB ..................................................................6-9
DRAM – 8MB.......................................................................................6-9
SRAM – 128K .......................................................................................6-9
3V/5V Converter ...................................................................................6-9
Energy-Save Switching.........................................................................6-9
Reset/Backup Circuit ..........................................................................6-10
SAF Backup........................................................................................6-10
Analog Processing Circuit...................................................................6-10
Modem................................................................................................6-10
Speaker Driver....................................................................................6-10
Heater Control ....................................................................................6-10
Video Processing Circuit.....................................................................6-10
Power Pack Control ............................................................................6-10
Scanner Driver....................................................................................6-10
Plotter Driver.......................................................................................6-10
6.5.2 SBU (SENSOR BOARD UNIT).......................................................6-11
Buffer ..................................................................................................6-11
CCD ....................................................................................................6-11
Amplifier..............................................................................................6-11
6.5.3 NCU (NETWORK CONTROL UNIT) ..............................................6-12
North America version ........................................................................6-12
Europe/Asia version............................................................................6-12

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6.6 COPY PROCESS OVERVIEW ...............................................................6-13
6.7 SCANNING..............................................................................................6-15
6.7.1 OVERVIEW ....................................................................................6-15
6.7.2 SCANNER DRIVE ..........................................................................6-16
6.8 IMAGE PROCESSING ............................................................................6-17
6.8.1 OVERVIEW ....................................................................................6-17
6.8.2 IMAGE PROCESSING PATH.........................................................6-18
6.8.3 ORIGINAL MODES ........................................................................6-19
Original Modes: Copying....................................................................6-20
6.8.4 IMAGE PROCESSING STEPS FOR EACH MODE .......................6-21
6.8.5 MODE ADJUSTMENTS .................................................................6-22
To customize... ...................................................................................6-22
Default plotter customization settings for each mode... ......................6-23
6.9 LASER EXPOSURE................................................................................6-24
6.9.1 OVERVIEW ....................................................................................6-24
6.9.2 LD SAFETY SWITCHES ................................................................6-25
6.10 PHOTOCONDUCTOR UNIT (PCU) ......................................................6-26
6.10.1 OVERVIEW ..................................................................................6-26
6.10.2 DRUM DRIVE...............................................................................6-27
6.11 DRUM CHARGE ...................................................................................6-28
6.11.1 OVERVIEW ..................................................................................6-28
6.11.2 CHARGE ROLLER VOLTAGE CORRECTION ............................6-29
Correction for Ambient Environment...................................................6-29
6.11.3 CHARGE ROLLER CLEANING....................................................6-30
6.11.4 DETECTION OF A NEW PCU......................................................6-31
At time of copier installation ................................................................6-31
When a replacement PCU is installed.................................................6-31
6.12 DEVELOPMENT ...................................................................................6-32
6.12.1 OVERVIEW ..................................................................................6-32
6.12.2 DEVELOPMENT BIAS .................................................................6-33
6.12.3 TONER SUPPLY..........................................................................6-34
Toner-Bottle Models (B044 and B046)................................................6-34
Toner Hopper Magazine (B045 and B049) .........................................6-35
6.12.4 TONER DENSITY CONTROL ......................................................6-36
Overview.............................................................................................6-36
Reference Voltage ..............................................................................6-36
Toner Density Sensor Initial Setting....................................................6-36
Toner Concentration Measurement ....................................................6-37
Vsp/Vsg Detection ..............................................................................6-37
Calculation of Vref ..............................................................................6-37
Toner Supply Determination ...............................................................6-37
Toner Clutch ON Time ........................................................................6-37
6.12.5 TONER SUPPLY IF SENSOR READING IS ABNORMAL ...........6-38
ID Sensor............................................................................................6-38
TD Sensor...........................................................................................6-38

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6.12.6 DETECTION OF TONER NEAR END AND TONER END ...........6-38
Toner Near End detected when either of the following occurs............6-38
Toner End detected when any of the following occurs........................6-38
6.13 DRUM CLEANING AND TONER RECYCLING.....................................6-39
6.14 PAPER FEED........................................................................................6-40
6.14.1 OVERVIEW ..................................................................................6-40
6.14.2 PAPER FEED DRIVE MECHANISM ............................................6-41
From Paper Tray.................................................................................6-41
From 100-Sheet Bypass Tray (B044, B046).......................................6-41
From 1-Sheet Bypass Tray (B045, B049)...........................................6-41
6.14.3 PAPER FEED AND SEPARATION ..............................................6-42
6.14.4 PAPER LIFT MECHANISM ..........................................................6-42
PAPER END DETECTION .................................................................6-43
Main Tray............................................................................................6-43
100-Sheet Bypass Tray (B044, B046) ................................................6-43
6.14.5 PAPER REGISTRATION..............................................................6-43
6.15 IMAGE TRANSFER AND PAPER SEPARATION .................................6-44
6.15.1 OVERVIEW ..................................................................................6-44
6.15.2 IMAGE TRANSFER CURRENT TIMING......................................6-45
6.15.3 TRANSFER ROLLER CLEANING................................................6-46
6.16 IMAGE FUSING AND PAPER EXIT......................................................6-47
6.16.1 OVERVIEW ..................................................................................6-47
6.16.2 FUSING DRIVE AND RELEASE MECHANISM ...........................6-47
6.16.3 PRESSURE ROLLER...................................................................6-48
6.16.4 PRESSURE RELEASE ................................................................6-48
Separation ..........................................................................................6-48
6.16.6 FUSING TEMPERATURE CONTROL..........................................6-49
Overview.............................................................................................6-49
Fusing Temperature Control for Thick Paper......................................6-49
6.16.7 OVERHEAT PROTECTION .........................................................6-49
6.17 ENERGY SAVER MODES ....................................................................6-50
6.17.1 MODE TRANSITIONS..................................................................6-50
6.17.2 SYSTEM SETTINGS ....................................................................6-51
6.17.3 LOW POWER MODE LEVELS.....................................................6-51
6.17.4 AUTO-OFF LEVEL .......................................................................6-51
6.17.5 TRANSITION OPERATION..........................................................6-51

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PAPER TRAY UNIT (B421)
1 OVERALL MACHINE INFORMATION...................................B421-1
1.1 MECHANICAL COMPONENT LAYOUT ............................................ B421-1
1.2 ELECTRICAL COMPONENT LAYOUT.............................................. B421-1
1.3 DRIVE LAYOUT ................................................................................. B421-2
1.4 OVERALL ELECTRICAL CIRCUIT .................................................... B421-2
1.5 DETAILED DESCRIPTIONS .............................................................. B421-3
1.5.1 PAPER FEED AND SEPARATION ........................................... B421-3
1.6 PAPER LIFT MECHANISM ................................................................ B421-3
1.7 PAPER END DETECTION ................................................................. B421-4
1.8 SIDE AND END FENCES .................................................................. B421-5
2 REPLACEMENT AND ADJUSTMENT...................................B421-6
2.1 FEED ROLLER AND FRICTION PAD................................................ B421-6
2.2 REMOVING THE PAPER TRAY UNIT FROM THE COPIER............. B421-6
If Optional Tray Heater Is Not Installed.......................................... B421-6
If Optional Tray Heater Is Installed ................................................ B421-6
2.3 SENSORS.......................................................................................... B421-7
2.4 DRIVE SECTION................................................................................ B421-8
2.4.1 DRIVE BLOCK .......................................................................... B421-8
2.4.2 PAPER FEED MOTOR.............................................................. B421-8
2.4.3 PAPER FEED CLUTCH ............................................................ B421-9
2.4.4 TRAY MAIN BOARD (2.4.1) ..................................................... B421-9
DOCUMENT FEEDER (B444)
1 OVERALL INFORMATION ....................................................B444-1
1.1 MECHANICAL COMPONENT LAYOUT ............................................ B444-1
1.2 ELECTRICAL COMPONENT LAYOUT.............................................. B444-2
1.3 DRIVE LAYOUT ................................................................................. B444-3
2 DETAILED SECTION DESCRIPTIONS .................................B444-4
2.1 PICK-UP AND SEPARATION ............................................................ B444-4
2.2 CLUTCH OPERATION....................................................................... B444-4
2.3 TRANSPORT AND EXIT.................................................................... B444-4
2.4 UNIT OPEN SWITCH AND GUIDE OPEN SENSOR......................... B444-5
2.5 OVERALL ELECTRICAL CIRCUIT .................................................... B444-5
3 REPLACEMENT AND ADJUSTMENT...................................B444-6
3.1 DF UPPER COVERS ......................................................................... B444-6
3.2 ORIGINAL TABLE .............................................................................. B444-6
3.3 FEED UNIT......................................................................................... B444-6
3.4 DF PICKUP ROLLER ......................................................................... B444-7
3.5 DF FEED ROLLER............................................................................. B444-7

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3.6 DF SEPARATION ROLLER ............................................................... B444-8
3.7 DF MOTOR ........................................................................................ B444-9
3.8 DF FEED CLUTCH........................................................................... B444-10
3.9 SENSORS........................................................................................ B444-10
3.10 DF EXPOSURE GLASS................................................................. B444-11
3.11 DF CONNECTION BOARD............................................................ B444-11
SPECIFICATIONS
1 GENERAL SPECIFICATIONS.............................................................. SPEC-1
2 MACHINE CONFIGURATION .............................................................. SPEC-5
3 OPTIONAL EQUIPMENT ..................................................................... SPEC-6
ADF .................................................................................................. SPEC-6
PAPER TRAY UNIT ........................................................................... SPEC-6

Stella C1/C1F (B044/B045/B046/B049)
PARTS CATALOG
This catalog gives the numbers and names of parts on this machine.
CONTENTS
Stella C1/C1F (B044/B045/B046/B049)
PS480 (B421)
Printer Controller Type 1013 (B441)

Stella C1/C1F
(B044/B045/B046/B049)

LOCATION OF UNIT ............................................... 2
1.EXTERIOR (B044/B045/B046/B049)................... 6
2.OPERATION PANEL (B044/B045/B046/B049)... 8
3.BY-PASS FEED UNIT (B044/B045/B046/B049). 10
4.PAPER REGISTRATION (B044/B045/B046/B049) 12
5.TRANSPORT SECTION (B044/B045/B046/B049) 14
6.PAPER CASSETTE (B044/B045/B046/B049).... 16
7.ADF 1 (B046/B049/B444).................................... 18
8.ADF 2 (B046/B049/B444).................................... 20
9.ADF 3 (B046/B049/B444).................................... 22
10.ADF 4 (B046/B049/B444)................................... 24
11.OPTICS SECTION 1 (B044/B045/B046/B049).. 26
12.OPTICS SECTION 2 (B044/B045/B046/B049).. 28
13.LASER UNIT (B044/B045/B046/B049).............. 30
14.PCU SECTION (B044/B045/B046/B049)........... 32
15.FUSING UNIT (B044/B045/B046/B049)............ 34
16.DRIVE SECTION (B044/B045/B046/B049)....... 36
Stella C1/C1F (B044/B045/B046/B049)
PARTS CATALOG
This catalog gives the numbers and names of parts on this machine.
CONTENTS
17.ELECTRICAL SECTION ................................... 38
(B044/B045/B046/B049)
18.FRAME SECTION (B044/B045/B046/B049)..... 40
19.FAX UNIT (B046/B049/B465)............................ 42
20.FCU BOARD (B044/B045) ................................ 44
21.FCU BOARD (B046/B049/B465)....................... 52
22.NCU BOARD (B046/B049/B465) ...................... 58
23.DECALS AND DOCUMENTS ........................... 60
(B044/B045/B046/B049)
24.SPECIAL TOOLS (B044/B045/B046/B049)...... 62
PARTS INDEX........................................................ 65
August ,05 ' 2001

2
LOCATIONS OF UNITSLOCATIONS OF UNITS
1. EXTERIOR (B044/B045/B046/B049)
See Page 7
2. OPERATION PANEL
See Page 9
3. BY-PASS FEED UNIT
See Page 11
LOCATIONS OF UNITS
4. PAPER REGISTRATION
See Page 13
LOCATIONS OF UNITS
5. TRANSPORT SECTION
See Page 15
LOCATIONS OF UNITS
6. PAPER CASSETTE
See Page 17