Toshiba G00I113 Service Note

BSINo. G00I113 Page 1

BSI No.: G00I113 Publish

2000/09/29

Date: Subject: FC-25P Service Manual

Model: FC25P

Category Field Application UNIT

New Model Description Others Documents

FactoryApplication: -

CONTENT

The new model (FC25P) is a product using the present model (FC15, FC22) as the base for the printer. This BSI is to substitute for a Service Manual by specifying the differences.

Elimination of optical system

Printer control only

[Differences]

The following table clarifies the differences in the table of contents of the Service Manual of the FC15 and the FC22.

o : Parts common to the FC25P

#1 : A separate explanation for the FC25P is added.

#2 : There is no optical system so some part of the contents have become unnecessary for the

FC25P.

x : FC25P unnecessary parts --- Letters in italic

The pages indicated by the sign #1, #2, X are appended as a separate file.

[Service Manual]

Chapter Page Contents Remarks

1 1-1~1-6

2 2-1~2-31 3

3-1 Expression of Colors and 4-Step Copy Process

3-2~3-9 General Description of Copying Process ~

3-10 List of Copying Process Conditions

4-1~4-5 4-6~4-12

4-13

5 5-1~5-8

SPECIFICATIONS/ACCESSORIES/OPTIONS/ SUPPLIES OUTLINE OF THE MACHINE

COPY PROCESS

Details of Copying Process

GENERAL OPERATION

Overview of Operation ~ Interruption copying

Detection of Abnormal Conditions ~ Immediately after the power is turned ON Automatic paper feed copying

IMAGE PROCESSING

BSINo. G00I113 Page 2

6 6-1~6-4

7 7-1~7-6

8 DISPLAY UNIT

8-1~8-6

8-7~8-10

9 9-1~9-32

10 10-1~10-10

11 11-1~11-16

12 12-1~12-22

13 13-1~13-30

14 14-1~14-10

15 15-1~15-8

16 16-1~16-16

17 17-1~17-6

18 18-1~18-2

18-3 18-4~18-7

IMAGE QUALITY CONTROL

COLOR REGISTRATION CONTROL

Detailed Drawing of the Control Panel and the Display Panel ~ Relation between Copier Conditions and Operator's Actions Description of Operation ~ Disassembly and Replacement SCANNER

LASER OPTICAL UNIT

DRIVE SYSTEM

PAPER FEEDING SYSTEM

PROCESSING UNIT (EPU)

UNITS AROUND THE PROCESSING UNIT

TRANSFER/TRANSPORT UNIT

FUSER UNIT

POWER SUPPLY UNIT

PWA-F-SIC-310~PWA-F-LGC-310

PWA-F-IMC-310

PWA-F-SCM-310~PWA-F-MAC-511

o o

o o o o o o o o o

[Service Handbook

Chapter

Page Contents Remarks

1-1~1-4 1-5~1-18

1-19~1-42

1-43

1-45

1-46~1-50

1-51~1-52

1-53~1-57

1-58~1-73

1-74~1-76

1-77~1-82

1-83

1-84

]

ADJUSTMENT ITEMS

Error Code List

Self Diagnostic mode ~ Output check (03 Test print mode(04) ~ Setting mode(08) Registering/changing ID codes

Adjustment Order (Copy Image Related Adjustment) Automatic Adjustment of the Auto-Toner Circuit ~ Automatic Initialization of Image Quality Control Copy lmage Dimensional Adjustment Paper alignment (paper buckle) at the main registration roller ~ Printer related adjustment Scanner related adjustment ~ Sharpness Adjustment High-Voltage Transformer Setting ~ Adjusting Doctor-to-Sleeve Gap Adjusting the Scanner Section

Adjusting the Cassette for Sidewise Deviation Key Copy Counter (MU-8, MU-10)

PREVENTIVE MAINTENANCE (PM)

BSINo. G00I113 Page 3

2-1~2-11

2-12 2-13

3 3-1~3-4

4-1~4-9

4-10~4-11

4-12~4-22

4-23~4-24

4-25~4-34

4-33~4-35

4-36

4-37~4-39

4-40~4-45 4-45~4-51

4-52 4-53~4-80

5 5-1~5-28

6-1

6-2

Types of Preventive Maintenance ~ Peventive Maintenance Checklist PM Kit

List of Adjustment Tools

PRECAUTIONS FOR STORING & HANDLING SUPPLIES TROUBLESHOOTING

Troubleshooting Based on Error Code ~ Paper jam in ADU and reversing area Original jam in the RADF

Paper jam in the sorter ~ Paper feeding system related service call Scanner related service call

Copy process related service call ~ Fuser unit related service call Communications related service call ADF related service call

Other service calls ~ Laser optical unit related service call Sorter related service call

Image quality related service call

Options related service call

Image processing options related service call ~ Troubleshooting of Image FIRMWARE UPDATING

WIRE HARNESS CONNECTION DIAGRAMS AC Wire Harness

DC Wire Harness Appendix

o o

Attached File

G00I113(Manual).pdf G00I113(Handbook).pdf

Related Documents:

LinkTo: Link From:

• Print speed (For FC-25P) (Prints/min.)

Paper supply

Paper size

A3, LD B4, LG

A4-R, B5-R, LT-R

A4, LT

A5-R, ST-R

A3 WIDE

Thick Paper 1(Full size)

Thick Papaer 2/3(Full size)

OHP Sheet (A4, LT)

Color modes/Monochrome modes

Cassette

12 14 17

Same as normal papers

LCF

–

SFB

12 14 17

2~6

January 2000 © TOSHIBA TEC 1 - 1 - 2 FC-22 SPECIFICATIONS

System copy speed

FC-15 FC-22

Copy mode

Number of sheets set

Color modes

Monochrome

modes

The same speed in both color

and monochrome modes

Copies/min.Copies/min. Copies/min.

Single-sided originals 1 set 12 16 16

x 3 sets 14 19 19

Single-sided copies 5 sets 14 20 20

Single-sided originals 1 set 4 4 4

x 3 sets 8 9 9

Two-sided copies 5 sets 10 12 12

Two-sided originals 1 set 4 4 4

x 3 sets 8 9 9

Two-sided copies 5 sets 10 12 12

Two-sided originals 1 set 11 12 12

x 3 sets 13 17 17

Single-sided copies 5 sets 14 19 19 Any of the left copy speeds includes the first cop y time and is a v ailable when the corresponding copy

mode is used and 10 A4-sized originals are set in the automatic document feeder. These values are attained in full color mode copying.

• Paper Cassette Duplex copy LCF Bypass copy Remarks

Size A3~A5R A4, LT A3~A5-R Irregular or

LD~ST-R LD~ST-R arbitrary sizes can be set.

Weight 64~105g/m2, 17~28 lb. 64~209g/m

17~110 lb. index

Special paper – – – Recommended

OHP film

• First print time ................... Approx. 10.3 seconds or under (A4/LT, the first cassette, 100%)

• Warming-up time............... Approx. 9 minutes

• Multiple copying ................ Up to 999 copies;entry by digital keys

• Reproduction ratio.............Actual ratio: 100±0.5%

Zooming: 25~400% in increments of 1%

• Resolution/Gradation Read: 600 dpi/256 gradation

Write: Corresponding to 9600 dpi x 600 dpi

(primary scanning only : 16 division smoothing)

• Excluded image width Leading edge: 5.0±2.0 mm, Trailing edge: 2.5±2.0 mm

Side edge: 2.0±2.0 mm

• Paper feeding.................... Automatic feeding: Copier’s cassettes–2 pieces standard (expandable up

to 4 pieces by installing optional cassettes) LCF–Optional (Stack height 165 mm : Equivalent to 1500 sheets of 80 g/m2, 20 lb.)

Bypass feeding:

• Capacity for originals .......................................A4, A4-R, B5, B5-R, A5-R, LT, LT-R, ST-R:

(Stack height 8 mm : Equivalent to 50 sheets of 80 g/m2, 20 lb.)

50 sheets

(Optional automatic document feeder) B4, Folio, LG, Comp: 35 sheets

A3, LD: 25 sheets

FC-22 SPECIFICATIONS 1 - 2 January 2000 © TOSHIBA TEC

• Stacking capacity of sheets ... Paper weight 64~80 g/m2, 17~22 lb.: 50 sheets

(Optional automatic duplexing unit)

• Toner supplying...................... Automatic toner-density detection and supply

• Density control ....................... Automatic density mode and manual density mode selectable in 11 steps

• Weight....................................

Paper weight 81~90 g/m2, 23~24 lb.: 40 sheets

Toner cartridge replacing method

Approx. 200 kg (FC15/22)

, Approx. 190kg (FC25P)

• Power requirements...............

• Power consumption................

The automatic document feeder, automatic duplexing unit and LCF are supplied with electric

power through the copier.

• Total counter........................... Mechanical counter (7 digit)

• Dimensions ............................ See the figure below (W845 x D750 x H1000 mm)

AC 115V/16A, AC 220 – 240V/9A (FC15/22)

9A (FC25P)

2.0 kW or less (115V series, 200V series) (FC15/22)

20kw or less, (200V series) (FC25P)

, AC115V/12A, AC220-240V/

, 1.5kw or less (115V)

1000 mm

750 mm

845 mm

January 2000 © TOSHIBA TEC 1 - 3 FC-22 SPECIFICATIONS

1.2 Accessories

Setup instructions 1 pc. Operator’s manual 1 pc. (not available for MJD) Color copy guide 1 pc. (not available for MJD) Setup report 1 set. (for NAD and MJD) CS card 1 pc. (for MJD) Operator’s manual pocket 1 pc. Detouchable code Copy receiving tray 1 pc. Warrantee sheet 1 pc. (for NAD) DF level up kit 1 pc. Cassette size plate for OHP film 1 pc. Media Pack 1 pc. Manual for Visual Cal 1 pc.

1 pc. (for ASD, AUD and MJD)(FC15/22)

/ 1 pc. (FC25P)

* Machine version

NAD: North America MJD: Europe AUD: Australia (FC15/22)/ Australia, South America (FC25P) ASD: Asia

FC-22 SPECIFICATIONS 1 - 4 January 2000 © TOSHIBA TEC

1.3 Options

Platen cover KA-2060PC Automatic document feeder (RADF) MR-3006A, MR-3006E Automatic duplexing unit (ADU) MD-5007, MD-5007N Cassette module MY-1011, MY-1011N Slot cover KE-FC22 Large capacity feeder (LCF) MP-1501 LCF kit KN-FC22L01 20-bin staple sorter MG-2014 Installation kit for staple sorter KN-FC22S01 Staple cartridge

External printer controller (Fiery Z4) KR-7037 Built-in printer controller (Fiery X4e) KR-7038 Video I/F kit for external controller connection KR-8005 Control panel kit for built-in controller KR-8006 Key copy counter MU-8, MU-10 Work table KK-2460 Work table kit KN-FC22W01 AI board KR-2030 Damp heater kit MF-FC22U, MF-FC22E Operator’s manual (English, French, German, Spanish, Italian) MANUAL FC25P (FC25P) Color copy guide GUIDE FC22 (English, French, German, Spanish, Italian) Fninisher MJ1014

STAPLE-400 (FC15/22)

STAPLE-700 (FC25P)

MNL2-FC22 (FC25/22)

January 2000 © TOSHIBA TEC 1 - 5 FC-22 SPECIFICATIONS

1.5 System List

feeder

MP-1501

Large capacity

KR-7037

(Fiery Z4)

KR-8005

KK-2460

Work table

KA-2060PC

Platen cover

MR-3006A, MR-3006E

Automatic document feeder

Key copy counter

Work table kit

KN-FC22W01

MU-8, MU-10

Cassette module

MY -1011, MY-1011N

KN-FC22L01

LCF kit

Cassette (Standard)

controller connection

External printer controller

Video I/F kit for external

MD-5007, MD-5007N

Automatic duplexing unit

KE-FC22

Slot cover

KN-FC22S01

staple sorter

KR-8006

built-in controller

Control panel kit for

Installation kit for

MG-2014

20-bin staple sorter

AI board

KR-2030

Finisher

KR-7038

Built-in printer

STAPLE-400

Staple cartridge

STAPLE-700

Staple cartridge

MJ-1040

controller (Fiery X4e)

FC-22 SPECIFICATIONS 1 - 6 January 2000 © TOSHIBA TEC

2. OUTLINE OF THE MACHINE

124

125

122

116

110

104

106

121

117

118

107

105

108

120

119

103

109

113

114

115

123

111 112

43 59 35 54 58

53 57

52 56 32 28

21 60 16 20

55 19

27 62 34 26 61 33 25 40

65 66

51 77 3146 38 49 75 29 44 36

102

101

86 88

101

102

80 81

7178

47 39 50 76 30 45 37 48 74

3 215

8 7

23 42 18941 17

126, 127

2.1 Sectional View

[A] Front view (The drive system is illustrated in [B] and [C])

January 2000 © TOSHIBA TEC 2 - 1 FC-22 OUTLINE OF THE MACHINE

1 Carriage 1

40 Cleaning blade Y

2 Exposure lamp 3 Reflector 4 Mirror 1 5 Thermostat 6 Carriage 2 7 Mirror 2 8 Mirror 3

9 Lens 10 CCD PC board 11 Scanner control board 12 Original glass 13 Carriage fan

14 SCM fan 15 SIC fan 16 Drum Y 17 Drum M 18 Drum C 19 Drum K

41 Cleaning blade M 42 Cleaning blade C 43 Cleaning blade K 44 Recovery blade Y 45 Recovery blade M 46 Recovery blade C 47 Recovery blade K 48 Toner recovery auger Y 49 Toner recovery auger M 50 Toner recovery auger C 51 Toner recovery auger K 52 Discharge LED Y 53 Discharge LED M 54 Discharge LED C 55 Discharge LED K 56 Main charger Y 57 Main charger M

58 Main charger C 20 Developer sleeve (Magnetic roller) Y 21 Developer sleeve (Magnetic roller) M 22 Developer sleeve (Magnetic roller) C 23 Developer sleeve (Magnetic roller) K 24 Upper mixer Y 25 Upper mixer M 26 Upper mixer C 27 Upper mixer K 28 Lower mixer Y 29 Lower mixer M 30 Lower mixer C 31 Lower mixer K 32 Doctor blade Y 33 Doctor blade M 34 Doctor blade C 35 Doctor blade K 36 Scattered toner recovery roller Y 37 Scattered toner recovery roller M

59 Main charger K

60 Charger wire cleaner Y

61 Charger wire cleaner M

62 Charger wire cleaner C

63 Charger wire cleaner K

64 Image quality sensor

65 Color registration sensor

66 Transfer belt

67 Transfer belt drive roller

68 Transfer belt cleaning blade

69 Transfer belt recovery blade

70 Transfer belt toner recovery auger

71 Suction charger

72 Transfer belt contact/release motor

73 Transfer belt driven roller

74 Transfer roller Y

75 Transfer roller M

76 Transfer roller C 38 Scattered toner recovery roller C 39 Scattered toner recovery roller K

FC-22 OUTLINE OF THE MACHINE 2 - 2 January 2000 © TOSHIBA

77 Transfer roller K

78 Transfer belt push-up mechanism

[C] Rear drive system

4213 49 5

26 25

27,28

36 30,31

14 15 7 16 17

6 9 18 208

19 3839

43 46

4446 46

January 2000 © TOSHIBA TEC 2 - 5 FC-22 OUTLINE OF THE MACHINE

1 Scan motor 2 Drive belt 3 Drive pulley 4 Driven pulley 5 Carriage drive wire

6 Drum motor Y (drum Y) 7 Drum motor M (drum M) 8 Drum motor C (drum C)

9 Drum motor K (drum K) 10 Color developer motor 11 Color developer drive belt 12 Black developer motor 13 Black developer drive belt 14 Developer sleeve (magnetic roller) Y 15 Developer sleeve (magnetic roller) M 16 Developer sleeve (magnetic roller) C 17 Developer sleeve (magnetic roller) K 18 Used toner transport unit (EPU side)

drive belt

42 Paper exit gate solenoid 43 ADU transport roller 1 44 ADU transport roller 2 45 ADU transport roller 3 46 ADU transport drive belt 47 Used toner transport motor 48 Used toner transport unit (main unit

side) drive belt

49 Document motor

50 Developer removal shutter open/close

motor

19 Transfer belt motor 20 Transfer belt drive roller 21 Registration roller 22 Registration clutch 23 Paper feed motor 24 Feed path clutch 25 Bypass feed roller 26 Bypass feed clutch 27 1st cassette feed roller 28 1st cassette feed clutch 29 1st cassette tray-up motor unit 30 2nd cassette feed roller 31 2nd cassette feed clutch 32 2nd cassette tray-up motor unit 36 Transport roller 37 Fuser motor 38 Upper fuser roller 39 Upper cleaning roller 40 Fuser exit roller 41 Exit roller

FC-22 OUTLINE OF THE MACHINE 2 - 6 January 2000 © TOSHIBA

2.2 Location of Electrical Parts

[A] Arrangement of Various Units

Scanner unit

Laser optical unit

Processing unit

Fuser unit

Transfer/transport unit

Main unit

Rear side

January 2000 © TOSHIBA TEC 2 - 7 FC-22 OUTLINE OF THE MACHINE

[B] Scanner unit (B-1) Motors

(B-2) Sensors and switches

[A4 series]

APS-1, 2, 3

APS-R APS-C

Rear side

SEN1SEN2

Rear side

[LT series]

APS-C

APS-R

APS-1

APS-3

SEN1SEN2

Rear side

FC-22 OUTLINE OF THE MACHINE 2 - 8 January 2000 © TOSHIBA

(B-3) PC boards

SCM

CCD

FUS-SCN

DH1-1 DH1-2

SDV

Rear side

(B-4) Others

THM02

EXP

Rear side

LRG

January 2000 © TOSHIBA TEC 2 - 9 FC-22 OUTLINE OF THE MACHINE

SSR-L

SSR-U

NFL

PWC

INL

(G-4) PC boards

SIC

IMC

Control panel

KEY DSP PNL

MTH

HVT-M-Y

HVT-M-M

HVT-M-C

HVT-M-K

(G-5) Others

LGC

Rear side

January 2000 © TOSHIBA TEC 2 - 15 FC-22 OUTLINE OF THE MACHINE

Rear side

2.3 Symbols and Functions of Various Devices

(1) Motors

Symbol

M1 SCN-MOT (B-1)

Name Function Remarks

Scans the carriages.

Scan motor

M2 DCM-MOT (B-1)

Drives the original-width indicator.

Document motor

M3 CRG-FAN (Fan, 80 square) (B-1)

Carriage fan motors

M4 SCM-FAN (Fan, 60 square) (B-1)

Cool the surroundings of the carriages. (2 pcs.) Cools SCM PC boards.

SCM fan motor

M5 IN-FAN (Fan, 60 square) (G-1)

SIC fan motor

M6 OUT-FAN (Fan, 60 square) (G-1)

SIC fan motor

M7 PU-FAN (Fan, 80 square) (G-1)

Ozone exhaust fan motor

M8 EX-FAN (Fan, 80 square) (G-1)

Fuser-unit exhaust fan motor

M9 POW-FAN (Fan, 80 mm square) (G-1)

Cools the SIC PC boards (suction).

Cools the SIC PC boards (exhaust).

Exhausts the ozone of copier.

Cools the fuser unit.

Cools the power unit.

Power-unit fan motor

M10 USTN-MOT (G-1)

Used toner transport motor

M11 POL-MOT (C-1)

Polygonal motor

M12 Y-TILT-MOT (C-1)

Tilt motor Y

M13 M-TILT-MOT (C-1)

Tilt motor M

M14 C-TILT-MOT (C-1)

Tilt motor C

M15 Y-TNR-MOT (G-1)

Toner motor Y

M16 M-TNR-MOT (G-1)

Toner motor M

M17 C-TNR-MOT (G-1)

Toner motor C

M18 K-TNR-MOT (G-1)

Transports used toner to the toner bag.

Drives the polygonal mirror.

Drives the parallel adjustment controls of the laser optical system (Y). Drives the parallel adjustment controls of the laser optical system (M). Drives the parallel adjustment controls of the laser optical system (C). Supplies toner (Y).

Supplies toner (M).

Supplies toner (C).

Supplies toner (K).

Toner motor K

FC-22 OUTLINE OF THE MACHINE 2 - 16 January 2000 © TOSHIBA

(5) Sensors and thermistors

Symbol Name Function Remarks

APS-1,2,3

APS-1, 2, 3 (3-beam) (B-2)

APS-C APS-C

Detects the size of original documents. (A4 series)

APS-R APS-R

Automatic original detection sensor

APS-1 APS-1 (B-2) APS-3 APS-3

Detects the size of original documents. (LT series)

APS-C APS-C APS-R APS-R

Automatic original detection sensor

CCD CCD-SEN (B-3)

Reads out information on originals.

CCD sensor

SEN1 HP-SEN (B-2)

Detects the carriage home position.

Carriage home position sensor

SEN2 PLTEN-SEN (B-2)

Platen sensor

SEN3-1 CSPEN-SEN (for 1st cassette) (G-3) SEN3-2 CSPEN-SEN (for 2nd cassette)

Cassette paper-empty sensor

SEN4 MNPEN-SEN (G-3)

Bypass paper sensor

Detects if the platen cover is open or closed. Detects if there is paper in the cassette or not.

Detects if there is paper in the bypass

tray or not. SEN5-1 CSLIM-SEN (for 1st cassette) (G-3) SEN5-2 CSLIM-SEN (for 2nd cassette)

Cassette tray-up limit sensor SEN6-1 CSJAM-SEN (for 1st cassette) (G-3) SEN6-2 CSJAM-SEN (for 2nd cassette) SEN6-3 CSJAM-SEN (for 3rd cassette) SEN6-4 CSJAM-SEN (for 4th cassette)

Cassette-feed jam sensor

SEN7 OHPE-SEN (G-3)

OHP edge sensor

SEN8 OHPC-SEN (G-3)

OHP center sensor

SEN9 PWA-F-SFB (G-3)

Bypass paper-width sensor

SEN10 RGST-SEN (G-3)

Registration sensor

Detects paper inside the cassette as well as detecting if the cassette tray is at its upper limit. Detects paper misfeeding.

Detects if paper or OHP is set.

Detects the paper width of the bypass tray. Detects if paper has reached the registration roller or not.

FC-22 OUTLINE OF THE MACHINE 2 - 20 January 2000 © TOSHIBA

(6) Heaters and lamps

Symbol Name Function Remarks

EXP EXPO-LAMP (B-4)

Exposes the original.

Exposure lamp

LRG PS-LRG-310 (B-4)

Controls the exposure lamp.

Lamp regulator

DH1-1 DNP-HTR (for lenses) (B-3) DH1-2 DNP-HTR (for mirrors)

Prevents condensation in the scanner section.

Damp heater

DH3-1 DNP-HTR (paper feed side) (E-1) DH3-2 DNP-HTR (paper exit side)

Prevents condensation on the drum surface.

Damp heater

LAMP1 UP-LAMP [F]

Heats the upper fuser roller.

Upper fuser lamp

LAMP2 LOW-LAMP [F]

Heats the lower fuser roller.

Lower fuser lamp

ERS-Y ERAS-LED (Y) (D-2)

ERS-M ERAS-LED (M)

Removes residual charge on the drum

surface. ERS-C ERAS-LED (C) ERS-K ERAS-LED (K)

Discharge LED lamp

(7) PC boards Symbol Name Function Remarks

SIC PWA-F-SIC-310 (G-4)

SIC PC board

LDR-Y PWA-F-LDR-310 (Y) (C-2)

Controls image processing and the

control panel.

Drives the lasers.

LDR-M PWA-F-LDR-310 (M)

LDR-C PWA-F-LDR-310 (C) LDR-K PWA-F-LDR-310 (K)

Laser drive PC board (LDR board)

OPT PWA-F-OPT-310 (C-2)

Detects the position of laser beams.

H-Sync signal detection PC board

MTH PWA-F-MTH-310 (G-4)

Relays between SIC and IMC.

Mother board

LGC PWA-F-LGC-310 (G-4)

General control of the copier.

LGC PC board

IMC

RLY PWA-F-RLY-310 (C-2)

PWA-F-IMC-310 (FC15/22)

PWA-F-IMC-313 (FP25P) IMC PC board

Laser relay PC board (RLY board)

Controls image processing and color

registration.

Relays between IMC and laser drive PC

boards.

Controls the scanner section.

(G-4)

SCM PWA-F-SCM-310 (B-3)

Scanner control PC board (SCM board)

CCD PWA-F-CCD-310 (B-3)

CCD PC board

Controls the pre-processing of CCD

image data.

Controls the scan motor.

SDV PWA-F-SDV-230 (B-3)

Scan motor drive PC board

DSP PWA-F-DSP-310 (G-4) PNL PWA-F-PNL-310

DSP PC board

PNL PC board

KEY PC board

KEY PWA-F-KEY-310

Control panel PC board

(8) Transformers

Symbol Name Function Remarks

HVT-M-Y HVT-M-M HVT-M-C

HVT-M-K

PS-HVT-M-310 (Y) (G-4) PS-HVT-M-310 (M)

Produces high voltages for charging,

development and discharging. PS-HVT-M-310 (C) PS-HVT-M-310 (K) Main high-voltage transformer

HVT-TB

PS-HVT-TB-310 (E-2) Transfer transformer

Produces high voltages for tr ansfer and

suction.

(9) Others

Symbol Name Function Remarks

SSR-U SSR (U) (G-5)

SSR-L SSR (L)

Switches the upper and lower fuser lamps ON and OFF.

Solid-state relay

FUS-SCN

FUS-TBU

PWA-F-FUS-351 (SCN) (B-3)

PWA-F-FUS-351 (TBU) (E-2) Fuse PC board

PS PS-ACC-310JU (115V series) (G-5)

Prevents over-current to damp heaters (scanner section, transfer/transport unit).

Provides electrical power. PS-ACC-310E (200V series) Switching power supply

NFL FL-VU-220F (115V series) (G-5)

Cuts off noise. FILTER-ZSB2210 (200V series) Noise filter

BR B-NK1D-110-20A (115v series) (G-5)

Safety switch B-NRW10-10A-Y (200V series) Breaker

INL INLET-AP300-2A2 (200V series) (G-5)

Inlet Inlet

PWC CBL/P-152UC-1 (115V series) (G-5)

Power cable CBL/P-INLET-EUR (200V series) Power cable

R K-LOAD-313 24V dummy load (G-5)

Dummy Load Do not touch as it becomes high

temperature

[I] Exit-side upper cover

(1) Shift the slide cover toward the rear to remove

it.

(2) Unscrew 3 screws and remove the exit-side

upper cover.

[J] Exit-side lower cover, front cover and rear cover, and paper-exit unit cover

(1) Remove the exit-side lower cover (4 screws). (2) Remove the exit-side front cover (2 screws). (3) Remove the exit-side rear cover (2 screws). (4) Remove the paper-exit unit cover (6 screws).

[K] Right top cover

(1) Remove the right top cover (3 screws).

Exit-side upper cover

Slide cover

Exit-side rear cover

Left top cover

Center top cover

Exit-side front cover

Paperexit unit cover

Exit-side lower cover

Right top cover

[L] Center top cover

(1) Remove the center top cover (3 screws).

[M] Left top cover

(1) Remove the left top cover (3 screws).

(5) Disconnect 4 connectors of the SIC board, unscrew 2 screws and take out the SIC board with the AI

board on it.

(6) Detach the SYS-ROM (J190) from the SIC board.

(7) Detach the AI-ROM (IC8) from the AI board. (8) Remove 4 lock supports and detach the AI board from the SIC board.

(9) Disconnect 5 connectors of the IMC board, unscrew 2 screws and take out the IMC board. (10)

Detach the IMC-ROM (IC30) from the IMC board.

AI board

SIC board

IMC board

[C] SCM board (Scanner Control Board)/SCM-

ROM

(1) Remove the glass retainer (2 screws). (2) Remove the original glass. (3) Remove the right top cover (3 screws). (4) Remove the right top bracket (3 screws). (5) Remove the lens cover (9 screws and

connector(s)).

(6) Detach the SCM board, disconnecting 11 con-

nectors and unscrewing 8 screws.

(7) Detach the SCM-ROM (IC19) from the SCM

board.

* See Chapter 9 for the detail on the above procedure.

Lock supports

AI board

SCM board

AI-ROM

SIC board

SYS-ROM

SCM-ROM

[D] Main high-voltage transformer

(1) Remove the rear cover. (2) Disconnect 5 connectors. (3) Unscrew 2 screws and remove the main high-

voltage transformer together with its bracket.

(4) Remove 2 screws and 2 lock supports and take

Connectors

out the main high-voltage transformer.

* All 4 transformers should be removed using the

same procedure.

3.2 General Description of Copying Process

Image

processing

Paper exit

Original exposure

2 3

Halogen lamp

Discharge LED array

Wavelength 660 nm x24 pcs

Conductive blade cleaning

–700 VDC

1.0 kV/500 Hz AC

Fusing

Heat roller

500 W x1, 400 W x1 (115V, 127V)

570 W x1, 460 W x1 (200V series)

180 W

Charger (grid voltage)

–550V (–250~–1000V)

–

Data reading (scanning)

CCD

600-dpi, 7500 pixel

–

Photoconductive drum

–

– –

++++

–

Separation/transfer

700~1500 W

(600~4800)

Toner

Data writing

Semiconductor laser

Pw=10.4 nJ/mm

Carrier

–

Development

Magnetic roller

Bias –400 VDC

(–100 ~ –700)

1.2 kV/4kHz AC

Bypass feeding

(50 sheets)

LCF feeding

(1500 sheets)

Cassette feeding

(600 sheets for each)

1 Charging: Places a negative charge on the sur-

face of the photoconductive drum.

Original exposure: Converts images on the original into optical signals.

Data reading: The optical image signals are read into CCD and converted into electrical signals.

4 Data writing: The electrical image signals are

changed to light signals (by laser emission) which expose the surface of the photoconductive drum.

5 Development: Negatively-charged toner is

made to adhere to the photoconductive drum, producing a visible image.

6 Transfer/separation: Transfers the visible toner

image onto paper, and separates the paper with the toner image from the photoconductive drum.

7 Fusing: Fuses the toner image to the paper by

applying heat and pressure.

8 Conductive blade cleaning : While scraping off

the residual toner from the drum, this blade also eliminates the (+) residual charge on the drum left after image transfer.

9 Discharge LED array: Eliminates the residual

(–) charge from the surface of the photoconductive drum.

(3) Data reading (scanning) Data reading is the process of illuminating the original with light and converting the reflected light into electrical signals.

CCD board

The light reflected from the original is directed to the charge coupled device (CCD) and this optical image information is converted to electrical signals (image signals), which are then sent to the image processing section via the scanner control PC board. The CCD for color processing has RGB filters provided over its surf ace, which allow the CCD to read the light amount in the respective ranges of wavelength. The image data corresponding to the respective RGB colors is then sent to the image processing section.

(Example)

CCD light receiving amount

Light 255

Dark 0

Scanner control

PC board

Image processing

section

Value of image signals to be output



Difference between "light "



and "dark" is divided into



256 steps.

 

(4) Data writing Data writing is the process of converting the image signals light signals and exposing the drum surface with the light signal. Namely, the image signals sent from the image processing section are converted into optical signals (laser emission) by the semiconductor laser element, which are then used to expose the drum surface, thus forming an electrostatic latent image there.

sent from the image processing section

into

Drum K

Image processing section

Laser drive PC board

Semiconductor laser element

Polygonal mirror

Drum Y

Drum MDrum C

+ 60 hidden pages