TOSHIBA 2060, 2860, 2870 SERVICE MANUAL

SERVICE MANUAL

PLAIN PAPER COPIER

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2060/2860/70

AUTOMATIC DUPLEXING UNIT

MD-5002

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Copyright TOSHIBA CORPORATION 1995
ALL RIGHTS RESERVED

GENERAL PRECAUTIONS REGARDING THE INSTALLATION
AND SERVICE FOR THE COPIER 2060, 2860/70 AND THE
AUTOMATIC DUPLEXING UNIT MD-5002

1. Transportation/Installation

• When transporting/installing the copier, use two persons and be sure to use the positions as indi­cated below.
The copier is fairly heavy and weighs approximately 73 kg (161 lb), therefore pay full attention
when handling it. (2870: 84 kg)

4 portions

2. Installation

• Be sure to use a dedicated outlet with AC 115V/15A (220V, 240V/10A) or more for its power
source.

• The copier must be grounded for safety.
Never ground it to a gas pipe or a water pipe.

• Select a suitable place for installation.
Avoid excessive heat, high humidity, dust, vibration and direct sunlight.

• Also provide proper ventilation as the copier emits a slight amount of ozone.

• To insure adequate working space for the copying oper ation, keep a minim um clearance of 80 cm
(32”) on the left, 80 cm (32”) on the right and 10 cm (4”) in the rear.

3. Service of Machines

• Basically, be sure to turn the main switch off and unplug the power cord during service.

• Be sure not to touch high-temperature sections such as the exposure lamp, the fuser unit, the
damp heater and their periphery.

• Be sure not to touch high-voltage sections such as the chargers and the high-voltage tr ansformer .

• Be sure not to touch rotating/operating sections such as gears, belts, pulleys, etc.

• When servicing the machines with the main switch turned on, be sure not to touch live sections
such as the lamp terminal, etc.

• Use suitable measuring instruments and tools.

4. Main Service Parts for Safety

• The breaker , door switch, fuse, thermostat, thermofuse, thermistor, etc. are particularly important
for safety. Be sure to handle/install them properly.

5. Notice Labels

• Be sure to check the rating plate and the cautionary labels such as “Unplug the power cord during
service”, “Hot area” etc. to see if there is any dirt on their surface or if they are properly stuck to the
copier during servicing.

6. Disposition of Consumable Parts/Packing Materials

• Regarding the recovery and disposal of the copier, supplies , consumable parts and packing mate­rials, it is recommended to follow the relevant local regulations or rules.

7. When parts are disassembled, reassembly is basically the reverse of disassembly unless
otherwise noted in this manual or other related documents. Be careful not to reassemble
small parts such as screws, washers, pins, E-rings, toothed washers in the wrong places.

8. Basically, the machine should not be operated with any parts removed or disassembled.

9. Precautions Against Static Electricity

• The PC board must be stored in an anti-electrostatic bag and handled carefully using a wristband,

because the ICs on it may become damaged due to static electricity.

1. SPECIFICATIONS • ACCESSORIES • OPTIONS • SUPPLIES

1.1 Specifications

Copy process Indirect electrophotographic process (dry)
Type Desk top (console when the pedestal is used)
Exposure Type Slit exposure with fixed table
Acceptable originals Kind Sheets, books, and 3-dimensional objects.

When the document feeder is used:
Sheet originals only (60 g/m2~90 g/m2) (16 lb.~24 lb.)

Maximum size A3 (Ledger)

Copy paper

Cassette Duplexing Manual Note

Size A3~A5-R A3~A6-R Adjustable to

(Ledger~Statement-R) Unfixed, Arbitary sizes
Thickness 64~80 64~130 Unit: g/m
(Weight) (17~22) (17~34) (Unit: lb.)

2

Special _ _ OHP film
paper etc.

Dec. 1996 © TOSHIBA 1 - 1 2060, 2860/70 SPECIFICATIONS

Copy speed

System copy speed

Cassette/manual LCF
Paper size 2060 2860 2060 2860
A4, B5, A5-R 20 28 20 28
LT, ST-R
A4-R, B5-R 20 26 — —
LT-R
B4, FOLIO 20 22 — —
LG, Computer
A3 19 19 — —
LD
Reduction/ 15 15 15 15
Enlargement

Manual feeding represents the value when the size is set.

CPM

(BLI format)

Mode CPM

Original→Copy Number of copies 2060 2860

1 → 1 1 set 19 24

3 set 20 27
5 set 20 28

1 → 2 1 set 10 10

3 set 15 18
5 set 17 21

2 → 2 1 set 8 8

3 set 14 16
5 set 16 19

2 → 1 1 set 16 16

3 set 19 23
5 set 19 25

*Ten originals (A4) are set in the ADF. This includes the first

copy time.

First copy Approx. 4.0 sec. (Actual-size A4 or Letter from upper cassette)
Warm-up time Approx. 80 sec.
Multiple copying 1~999, keyboard entry
Reproduction ratio

Actual ratio 100% or 101% (Setting mode)
Zoom ratios 50~200% (Multiple reduction and enlargement in 1% steps)

2060, 2860/70 SPECIFICATIONS 1 - 2 Dec. 1996 © TOSHIBA

Paper supply Cassette or sheet-bypass feeding

Cassette: 600 sheets
Sheet-bypass feeding: 50 sheets

Toner supply Automatic density detection and replenishment

Toner cartridge replacement
Exposure Automatic control and manually selectable (9 steps)
Weight Copier: 73 kg (with 2 cassettes and the platen cover),

ADU: 10 kg
Power source 115 V ~ 60 Hz, 12A For the U.S.A. and Canada

220 V ~ 50/60 Hz, 8A

240 V ~ 50 Hz, 8A
Power consumption 1.5 kW (115 V), 1.7 kW (220 V/240 V)
Counter 6-digit total counter

Machine size

598mm

640mm

For Europe

123

540mm

Dec. 1996 © TOSHIBA 1 - 3 2060, 2860/70 SPECIFICATIONS

1.2 Accessories

Copy receiving tray : 1 pc.
Operator’s manual : 1 pc.
Set-up report : 1 pc.
Drum : 1 pc.
Developer : 1 bottle
Toner : 1 pc.
*Accessories vary according to the destination.

1.3 Options

Automatic duplexing unit: ADU MD-5002
Automatic document feeder: ADF MR-3006 (RADF), MR-2008 (ADF)
Paper feed pedestal: PFP KD-1003 (1 cassette), KD-2009 (2 cassettes)
Paper feed unit MY-1006
Large capacity feeder: LCF MP-1501
Sorter MG-1003A (10 bins)

Key copy counter MU-8/MU-10 (6 digit)

*Options vary according to the destination.

1.4 Supplies

Drum OD-2060
Developer ZD-2060
Toner ZT-2060

MG-1004 (10 bins staple)

MG-2009 (20 bins)

MG-2010 (20 bins staple)

2060, 2860/70 SPECIFICATIONS 1 - 4 Dec. 1996 © TOSHIBA

2. OUTLINE OF THE MACHINE

2.1 Sectional Views and Electrical Parts Location Diagram

2.1.1 Sectional view
[A] Front view

6

BT

7

8

2

AQ

5

FR

FR

1

FQ

FK

ES

ES

4

EP ER

FT

3

EQ

EO

ENEM

EL

EK

GK
GT

CT

AO

AS

AP AN

AR BK AL

BL

BN

BM

BR

BO

BP

BQ

FS

BS

CL

CK

ET

DS

CN

DR

CO

CM

DP

AM

AT

AK

DO
CS
DT

CR
FL
DN

9

CP

FM

DQ

DK

DL

CQ

FO

DMFN

FP

(This diagram includes an installed ADU. Refer to Chapter 13 concerning the ADU.)

Dec. 1996 © TOSHIBA 2 - 1 2060, 2860/70 GENERAL

No. Name

No. Name

1 Carriage 1
2 Mirror 1
3 Reflector
4 Light distribution adjustment plates
5 Exposure lamp
6 Carriage 2
7 Mirror 2
8 Mirror 3
9 Mirror unit
AT Mirror 4
AK Mirror 5
AL Mirror 6
AM Slit glass
AN Auto exposure sensor
AO Lens
AP Original glass
AQ Ozone filter
AR Main charger

CQ Cassette
CR Manual feed separation pad
CS Manual feed roller
DT Manual pickup roller
DK Cassette separation roller
DL Cassette feed roller
DM Cassette pickup roller
DN Upper transport roller
DO Manual feed switch (S6)
DP Paper guide
DQ Lower transport roller
DR Aligning switch (S8)
DS Aligning roller (U)
ET Aligning roller (L)
EK Thermistor-1 (THMS1)
EL Thermostat (THERMO)
EM Heater lamp

EN Heat roller (upper side)
AS Discharge lamp
BT Receiving tray
BK LED eraser array
BL Main blade
BM Recovery blade
BN Toner recovery auger
BO Separation claw (for drum)
BP Transfer charger
BQ Separation charger
BR Drum
BS Bias guide
CT Transport belt
CK Magnetic roller
CL Leveller (doctor)
CM Auto-toner sensor
CN Mixer 1
CO Mixer 2
CP Sheet bypass guide

EO Pressure roller (lower side)

EP Separation claw (for heat roller)

EQ Felt roller

ER Heat roller cleaning blade

ES Fuser exit roller

FT Scraper

FK Fuser cover

FL Paper stop switch-1 (S7)

FM Paper stop switch-2 (S16)

FN Paper-empty switch-2 (S14)

FO Cassette tray

FP Cassette size switch-2 (S15)

FQ Exit/ADU selection gate

FR Exit roller

FS ADU

GT Exit fan (M7)

GK Bottom fan (M8)

2060, 2860/70 GENERAL 2 - 2 Dec. 1996 © TOSHIBA

[B] Rear side view

HP HO IO IP

GQ

HLGRHKHTHRITIK

HS

GS

IT

IM

IT

IN

HN

HQ

HM

CT

EN

GP

FRES

IL

IN

Dec. 1996 © TOSHIBA 2 - 3 2060, 2860/70 GENERAL

No. Name

GP Scanning motor (M2)
GQ Carriage drive wire
GR Drum gear
GS Aligning clutch (CLT2)
HT Drum driving gear
HK Drum belt
HL Belt for dev-unit, ALGN-roller & paper feeding drive
HM Belt for fuser drive
HN Main motor (M1)
HO Lens motor (M3)
HP Mirror motor (M4)
HQ Thermistor-2 (THMS2)
HR Dev-unit drive gear
HS Aligning roller
IT Paper feed belt
IK Manual feed clutch (CLT4)
IL Transport roller clutch (CLT1)
IM Transport roller drive belt
IN Cassette feed clutch (CLT3, 5)
IO Optical fan (M6,12)
IP Document motor (M11)

2060, 2860/70 GENERAL 2 - 4 Dec. 1996 © TOSHIBA

2.1.2 Electrical parts layout
[A] DC electrical parts (except motors)

[Front side]

1

BT

6

3

2

7

BO

8

AK

AL
BP

BN

AQ

AT

AS

AP

BK

CM

AR

CS

CP

CO

CT

DT

CK

CN

4

BQ

BL

BM

AN

AO

CQ

9

CR

AM

BS

5

CL

[Rear side]

Dec. 1996 © TOSHIBA 2 - 5 2060, 2860/70 GENERAL

No. Name

No. Name

1 Control panel key PC board (PWA-KEY)
2 Display PC board (PWA-DSP)
3 Liquid crystal module (LCD)
4 Total counter (T-CTR)
5 Logic PC board (PWA-LGC)
6 Auto paper sensor-2 (APS-R)
7 Auto paper sensor-3 (APS-C)
8 Auto paper sensor-4 (APS-F)
9 Toner-full switch (T-FUL-SW) (S13)

*AT Size switch 1 (SIZE1-SW) (S5)

AK Discharge lamp PC board (PWA-ERS)
AL LED eraser array PC board (K-DCH)
AM High-voltage power supply (PS-HVT)
AN Home switch (HOME-SW) (S10)
AO Platen switch (PTN-SW) (S27)
AP Manual feed switch (M-FED-SW) (S6)
AQ Aligning switch (PSTPO-SW) (S8)
AR Paper stop switch 1 (PSTP1-SW) (S7)

*BK Paper-empty switch-1 (EMP1-SW) (S3)

BL Exit switch (EXIT-SW) (S9)
BM Heat-roller thermistor 1 (THMS1-HTR)
BN Toner sensor (TNR-ATC)
BO Lens switch (LNS-SW) (S11)
BP Mirror switch (MRR-SW) (S12)
BQ Automatic exposure PC board (PWA-AES)
BS Aligning-roller clutch (RGT0-CLT) (CLT2)
CT Transport-roller clutch (RGT1-CLT) (CLT1)
CK Manual-feed roller clutch (MFED-CLT) (CLT4)

*CL Feed-roller clutch 1 (FED1-CLT) (CLT3)

CM Size switch 2 (SIZE2-SW) (S15)
CN Feed-roller clutch 2 (FED2-CLT) (CLT5)
CO Paper-empty switch 2 (EMP2-SW) (S14)
CP Paper stop switch 2 (PSTP2-SW) (S16)
CQ Heat-roller thermistor-2 (THMS2-HTR)
CR Drum thermistor (DRM-THMS)

*CS Tray-up switch (T-UP1-SW) (S28)
AS Side door switch (U-COV-SW) (S4)
BT Auto paper sensor-1 (APS-3B)

*: Option

DT Tray-up switch (T-UP2-SW) (S29)

2060, 2860/70 GENERAL 2 - 6 Dec. 1996 © TOSHIBA

[B] DC electrical parts (motors)

EK

DO

[Front side]

DS

DP

DL

ET

EL

No. Name

DK Main motor (MAIN-MOT) (M1)
DL Scanning motor (SCN-MOT) (M2)
DM Lens motor (LNS-MOT) (M3)
DN Mirror motor (MRR-MOT) (M4)
DO Toner motor (TNR-MOT) (M9)
DP Document motor (DCM-MOT) (M11)

DK

DM

DN

DQ

DR

[Rear side]

No. Name

*DQ Tray-up motor-1 (T-UP1-MOT) (M13)

DR Tray-up motor-2 (T-UP2-MOT) (M14)

DS Optical fan-F (OPT-FAN-F) (M12)

ET Optical fan-R (OPT-FAN-R) (M6)

EK Exit fan (EXIT-FAN) (M7)

EL Bottom fan (BTM-FAN) (M8)

*: Option

Dec. 1996 © TOSHIBA 2 - 7 2060, 2860/70 GENERAL

[C] AC electrical parts

[Front side]

FM

EN

FK

EP

FT

FN

EO

FO

FL

ES

EQ

EM

ER

[Rear side]

No. Name

EM SW power supply (PS-ACC)
EN Door switch (DOOR-SW) (S2)
EO Main switch (MAIN-SW) (S1)
EP Lamp regulator PC board (PWA-LRG)
EQ Heater lamp (HTR-LAMP)
ER Damp heater L (D-HTR-L) (Option)

No. Name

FT Thermostat (Option)
FK Damp heater U1 (D-HTR-U1) (Option)
FL Exposure lamp (EXPO-LAMP)
FM Thermofuse (FU-EXPO)
FN Fuse PC board (PWA-FUS) (Option)
FO Damp heater U2 (D-HTR-U2) (Option)

ES Thermostat (K-THERMO)

2060, 2860/70 GENERAL 2 - 8 Dec. 1996 © TOSHIBA

2.2 Symbol and Function of Electrical Parts

(1) Motors

Symbol

M1 MAIN-MOT (Main motor) Drives the drum, developer, IC motor 10 31

M2 SCN-MOT (Scanning motor) Scans the optical system Pulse motor 5 23
M3 LNS-MOT (Lens motor) Drives the lens unit Pulse motor 11 23
M4 MRR-MOT (Mirror motor) Drives the mirror unit Pulse motor 11 23
M6 OPT-FAN-R (Optics fan-R) Cools the optical system IC motor: Z80 5 8
M7 EXIT-FAN (Exit-fan) Cools the drum and cleaner IC motor: Z80 4 14
M8 BTM-FAN (Bottom fan) Prevents the paper from floating IC motor: Z80 4 14

M9 TNR-MOT (Toner motor) Replenishes the toner Brush motor 23 30
M11 DCM-MOT (Document motor) Drives copy-area indicators Pulse motor 9 2
M12 OPT-FAN-F (Optical fan-F) Cools the optical system IC motor: Z80 4 14
M13 T-UP1-MOT (Tray-up motor-1) Drives the upper cassette tray to Brush motor 12 36

Code name Remarks

heat roller and transport belt

up through suction

lift up/down

Function

Parts list

Page Item

M14 T-UP2-MOT (Tray-up motor-2) Drives the lower cassette tray to Brush motor 12 36

lift up/down

(2) Electromagnetic spring clutches

Parts list

Symbol

CLT1 RGT1-CLT Transmits transport-roller drive. 13 40

(Transport-roller clutch)

CLT2 RGT0-CLT Transmits aligning-roller drive. 15 16

(Aligning-roller clutch)

CLT3 FED1-CLT Transmits feed-roller clutch 12 24

(Feed-roller clutch-1) drive. (Upper cassette)

CLT4 MFED-CLT Transmits manual-feed roller 14 17

(Manual-feed roller clutch) clutch drive.

CLT5 FED2-CLT Transmits feed-roller clutch 12 24

(Feed-roller clutch-2) drive. (Lower cassette)

Code name Function Remarks

Page Item

(3) Counters

Parts list

Symbol Code name

T T-CTR (Total counter) Total counter 6-digit 3 23

K K-CTR (Key-copy counter) Individual counter 6-digit (option) 101 5

Dec. 1996 © TOSHIBA 2 - 9 2060, 2860/70 GENERAL

Function

Remarks

Page Item

(4) Switches

Parts list

Symbol

S1 MAIN-SW (Main switch) Power supply Tumbler type 6 3
S2 DOOR-SW (Door switch) For safety, cancels abnormal Push switch 6 4

S3 EMP1-SW Detects lack of paper in the upper Photointerruptor 12 32

S4 U-COV-SW For safety, detects open/closed Push switch 2 27

Code name

condition

(Paper-empty switch-1) cassette

Function

Remarks

Page Item

(Side door switch)
S5 SIZE1-SW (Size switch-1) Detects upper cassette size Push switch 13 50
S6 M-FED-SW Detects manual feeding Photointerruptor 14 3

(Manual-feed switch)
S7 PSTP1-SW Detects paper in front of the Photointerruptor 13 8

(Paper stop switch-1) upper transport roller
S8 PSTP0-SW Detects paper in front of the Photointerruptor 15 20

(Aligning switch) aligning roller
S9 EXIT-SW (Exit switch) Detects exiting paper Photointerruptor 28 8

S10 HOME-SW (Home switch) Detects home position of the Photointerruptor 11 8

S11 LNS-SW (Lens switch) Detects home position of the lens Photointerruptor 11 8

S12 MRR-SW (Mirror switch) Detects home position of the mirror Photointerruptor 11 8

S13 T-FUL-SW Detects when the used toner bag Push switch 10 25

(Toner-full switch) is full

S14 EMP2-SW Detects lack of paper in the lower Photointerruptor 12 32

condition of paper jam release cover

optical system

unit

unit

(Paper-empty switch-2) cassette

S15 SIZE2-SW Detects lower cassette size Push switch 13 50

(Size switch-2)

S16 PSTP2-SW Detects paper in front of the lower Photointerruptor 2 26

(Paper stop switch-2) transport roller

S27 PTN-SW Detects open/closed condition of Photointerruptor 5 38

(Platen switch) the platen cover

S28 T-UP1-SW Detects the position of the upper Photointerruptor 12 32

(Tray-up-1 switch) cassette tray

S29 T-UP2-SW Detects the position of the lower Photointerruptor 12 32

(Tray-up-2 switch) cassette tray

2060, 2860/70 GENERAL 2 - 10 Dec. 1996 © TOSHIBA

(5) Heaters and lamps

Parts list

Symbol

EXP EXPO-LAMP Exposes the original Halogen lamp 18 13

HTR HTR-LAMP (Heater lamp) Fixing Halogen lamp 25 6

ERS ERS-LAMP Discharges the drum Fuse type 4 12

DCH DCH-LED To interrupt the charge LED 4 10

DHU1

Code name

(Exposure lamp) 300W

(Discharge lamp)

(LED eraser array)

D-HTR-U1 (Damp heater U1) Keeps optical system warm (option)

Function

Remarks

900W
(100V series)
1100W
(200V series)

Cement resistor 102 4

Page Item

DHU2
DHL D-HTR-L (Damp heater L)

D-HTR-U2 (Damp heater U2) Keeps optical system warm (option)

Keeps the drum and transfer/separation
charger case warm (option)

Cement resistor 102 4
Cement resistor 7 30

(6) PC boards

Symbol

LGC PWA-LGC (Logic PC board) Controls the entire copier 8 15
DSP PWA-DSP Controls condition displays 3 20

(Display PC board)

KEY PWA-KEY Controls operation keys 3 21

(Key PC board)

LRG PWA-LRG Controls exposure lamp 5 20

(Lamp regulator PC board)

DCH K-DCH Turns on and drives LED during 4 10

(LED eraser array PC board) reduction

ERS PWA-ERS Discharge lamp 4 12

Code name

Function

Remarks

Parts list

Page Item

(Discharge lamp PC board)

AES PWA-AES Reads dark/light of the original 17 37

(Automatic exposure PC board)

FUS PWA-FUS (Fuse PC board) Fuse for the damp heater circuit 7 31

Dec. 1996 © TOSHIBA 2 - 11 2060, 2860/70 GENERAL

(7) Transformers

Parts list

Symbol

HVT PS-HVT (Charging transformer) Generates high voltage electricity

ACC PS-ACC Power supply for whole copier 8 7

(Power supply for all) power

Code name

for charging (negative voltage)
(Transfer/separation Generates high voltage electricity
transformer) for transfer/separation and

developing bias voltage
(Transfer bias Generates bias voltage to raise
transformer) transfer efficiency

Function

Remarks

Mono unit type 7 27

Page Item

(8) Others

Parts list

Symbol

ATS SNR-ATC Reads toner density with a magnetic 23 33

Code name

Function

Remarks

Page Item

(Auto-toner sensor) sensor

THMS1 THMS1-HTR Detects temperature of the heat roller 26 19

(Heat-roller thermistor-1)

THMS2 THMS2-HTR Detects the temperature of the heat roller 26 27

(Heat-roller thermistor-2) end

THERMO K-THERMO Prevents abnormal heating of heat roller 26 8

(Thermostat)

FU FU-EXPO (Thermofuse) Prevents abnormal heating of the 18 12

exposure lamp

2060, 2860/70 GENERAL 2 - 12 Dec. 1996 © TOSHIBA

2.3 Wire Harness Location Diagram

[A] Location diagram for upper unit

Dec. 1996 © TOSHIBA 2 - 13 2060, 2860/70 GENERAL

[B] Location diagram for lower unit

2060, 2860/70 GENERAL 2 - 14 Dec. 1996 © TOSHIBA

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3560/70 S/M

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2.4 Removal of Co vers and PC Boards

2.4.1 Removal of covers
[A] Front cover

(1) Open the front cover.
(2) Remove the pins on the hinges at both ends

(1 each).

[B] Upper rear cover

(1) Remove the 4 screws.

[C] Lower rear cover

(1) Remove the upper 3 screws.
(2) Loosen the lower 2 screws.

Front cover

Upper rear cover

Upper
feed
cover

[D] Upper feed cover

(1) Open the front cover and the bypass tray and

then remove the 2 screws.

[E] Feed cover (left and right)

(1) Remove the paper feed cover.
(2) When removing the left feed cover, open the

front cover.

(3) Remove the screws (2 on each side).

Left
feed
cover

Right feed cover

Lower
rear
cover

Loosen

Dec. 1996 © TOSHIBA 2 - 15 2060, 2860/70 GENERAL

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3560/70 S/M

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[F] Upper exit cover

(1) Remove the 2 screws.
(2) Open the front cover and remove the screw.

[G] Lower exit cover

(1) Lift the upper unit.
(2) Remove the 5 screws.

[H] Rear top cover

(1) Remove the original cover.
(2) Remove the 4 screws.

Left top cover

Upper exit cover

Lower exit cover

Rear top cover

Right top cover

[I] Right top cover (feed side)

(1) Remove the 2 screws.

[J] Left top cover (exit side)

(1) Remove the 2 screws.

[K] Glass fix

(1) Remove the 2 screws.

[L] Upper inner cover

(1) Remove the process unit.
(2) Remove the 3 screws.

Glass fix

Upper inner cover

2060, 2860/70 GENERAL 2 - 16 Dec. 1996 © TOSHIBA

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3560/70 S/M

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[M] Middle inner cover

(1) Remove the screw.

[N] Door switch cover

(1) Remove the 2 screws.

Middle inner cover

Door switch cover

[O] Lower inner cover

(1) Remove the toner box.
(2) Remove the middle inner cover.

Lower inner cover

(3) Remove the 1 screw.

Dec. 1996 © TOSHIBA 2 - 17 2060, 2860/70 GENERAL

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3560/70 S/M

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2.4.2 Removal of main PC boards
[A] Logic PC board (PWA-LGC)

(1) Remove the lower rear cover.
(2) Remove the 16 connectors (2860).

(15 connectors for 2060).
(3) Remove the lock supports (4 pcs.)
(4) Remove the logic PC board.

[B] Power supply PC board (PS-ACC)

(1) Remove the connector bracket (2 screws).
(2) Remove the 14 connectors.
(3) Remove the 4 screws.
(4) Remove the power supply PC board.

[C] Lamp regulator PC board (PWA-LRG)

(1) Remove the upper rear cover.
(2) Remove the 2 connectors.

Lock support

Lock support

PWA-LGC

PWA-LRG

Lock support

PS-ACC

Connector bracket

(3) Remove the lamp regulator PC board (4 lock

supports).

Connectors

2060, 2860/70 GENERAL 2 - 18 Dec. 1996 © TOSHIBA

Lock support

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3560/70 S/M

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[D] ADU drawer connector

(1) Remove the logic PC board.
(2) Remove the bracket for the logic PC board (3

screws).

Remove the connector J535 on the PS-ACC.
(3) Remove the bracket for the ADU drawer con-

nector (2 screws).

Bracket for PWA-LGC

ADU drawer connector bracket

Dec. 1996 © TOSHIBA 2 - 19 2060, 2860/70 GENERAL

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3560/70 S/M

3. COPYING PROCESS

3.1 Copying Process

Original exposure

2

Halogen lamp

Paper exiting

300 W

7

Fixing

Heat roller

900 W (115V)
1030W (220/240V)

9

8

LED eraser array

63 LEDs

Charging

1

–635V ±5 V

Discharge lamp

1.8W x 9 lamps

Cleaning

Separation
AC 3.41 kV

1 kHz

Optical

section

_

_

+

+

+

_

_

+

+

Transfer

–DC 5.25 kV

5

6

Toner

Carrier

_

_

+

_

+

_

+

3

Black development

Magnetic roller
Bias –100 VDC

Sheet-bypass feeding
(50 sheets)

Cassette feeding (upper/
lower/PFP)(600 sheets)

LCF feeding
(1500 sheets)

4

Transfer bias

1 Charging :Negatively charges surface of

D

the photosensitive drum.

2 Exposure : Forms an electrical image on

D

the drum.

3 Development : toner adheres to surface of

D

photosensitive drum and forms
a visible image.

4 Transfer bias :Increases transfer efficiency.

D

5 Transfer :Transfers the visible image from

the drum onto the transfer
(copy) sheet.

–DC 990 V

6 Separation : Separates the transfer sheet,

along with the toner, from the

D

drum.

7 Fixing :Fixes the toner on the transfer

sheet by applying heat and

D

pressure.

8 Cleaning :Mechanically removes any re-

D

9

Discharge lamp

maining toner on the drum.

:Discharges any remaining

charge from the drum.

Dec. 1996 © TOSHIBA 3 - 1 2060, 2860/70 PROCESS

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3.2 Comparison with the 2050 of Copying Process Conditions

Process 2050 2060/2860

1. Drum OD-1710 (OPC ø60) OD-2060 (OPC ø60)
(1) Sensitivity Highly sensitized drum (1)
(2) Charger grid voltage DC –800V (2)–635 V DC

Scolotron system Scolotron system

Output adjustable by using the
ten keys

2. Main charger Variable output (fixed current) using
the digital keys

3. Exposure

(1) Light control Automatic exposure/manual (1)Automatic exposure and

slide volume setting manual 9-step setting

(2) Light source 300W halogen lamp stabilized with (2)

regulator (light intensity remains
constant even when voltage varies)

4. Development

(1) Magnetic roller One magnetic roller (with two shaft (1)

mixers)

(2) Auto-toner Magnetic bridge-circuit system (2)
(3) Toner replenishment Toner cartridge system (3)
(4) Toner-empty detection Intensity sensing system (4)
(5) Toner T-1710 (Black) (5)T-2060 (Black)

T-1710-R (Red)
T-1710-BL (Blue)

(6) Developing material D-1710 (Black) (6)D-2060 (Black)

D-1710-R (Red)
D-1710-BL (Blue)

(7) Developer bias –194V DC, volume adjustable (7)–100 V DC, adjustable using the

digital keys

5. Transfer bias –1.4KV DC –990 V DC

6. Transfer Adjustable output (fixed current) using
the digital keys

7. Separation Adjustable output (independently
adjustable using the digital keys)

2060, 2860/70 PROCESS 3 - 2 Dec. 1996 © TOSHIBA

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3560/70 S/M

Process 2050 2060/2860

8. Discharge

(1) Discharging position Discharge by exposure after cleaning (1)
(2) Discharge lamp Discharge by tungsten lamp (2)

9. Cleaning

(1) System Blade system (1)
(2) Recovered toner Non-reusable (2)

10. Fixing

(1) System Long-life heat roller system (1)

• Fixing • Fixing roller: Teflon coated roller • Fixing roller:
Aluminum roller coated with
Teflon (ø40)

• Pressure • Pressure roller: PFA tube silicon • Pressure roller:

roller (ø28) Silicon rubber roller with

PFA tube. (ø35)

• Lamp rating Infrared heat Infrared heat

• 900W (100V series) • 900W (115V)

• 1100W (200V series) • 1030W (220/240V)

(2) Cleaning Cleaning with silicon impregnated (2)

roller

(3) Heater-temperature control ON/OFF control by thermistor (3)

11. Control Microcomputer

Dec. 1996 © TOSHIBA 3 - 3 2060, 2860/70 PROCESS

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4. COPIER OPERATION

4.1 Operation Outline

Copier operation Operation during warm up and standby

Automatic-feed copying using PRINT key

Copying operation Bypass-feed copying

Interrupt copying

4.2 Description of Operation

4.2.1 Operation up to standby state after power on

(1) Initial operation

• The main switch is turned ON.

• Copy quantity indicator “0” and “WAIT WARMING UP” are displayed.

• Initialization of the optical system
~ Carriages move to their home position and then stop.
~ Lens and mirror units move to their home position and then stop.
~ Indicators perform the initial operation and move to a position indicating the copy area.

• Initialization of the paper feed section
~ Each slot’s cassette trays move upward. If they were raised already, they are not moved.

(2) Pre-running

65 sec. have elapsed since the power was turned ON ~
Main motor rotates ~ Fuser unit drive section rotates: Pre-running

Pressure roller is warmed

After pre-running for 15 sec., the main motor stops

~ Fuser unit drive section stops

(3) When the heat roller temperature is sufficient for fixing, the heater lamp is turned off , and the copier

enters the standby mode.

4.2.2 Standby (ready)

• Bottom fan motor (M8) and exit fan motor (M7) are running at low speed.

• All keys on the control panel are operable.
When there is no key input for a set amount of time, the copy quantity “1” will be shown, the
reproduction ratio will indicate “actual size”, and the exposure will be set at automatic.

Dec. 1996 © TOSHIBA 4 - 1 2060, 2860/70 OPERATION

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4.2.3 Automatic feed copying using the PRINT key

(1) PRINT key is pressed

• Main, transfer, and separation chargers, transfer bias, discharge lamp and LED eraser array are
turned on.

• Optical fan motor (M6, M12), bottom fan motor (M8) and exit fan motor (M7) are running at high
speed.

• Main motor is turned on
~ Drum, developer unit, transport belt, heat roller, and exit roller are running.

(2) Cassette feeding

• Feed clutch (CLT3 or 5) is turned on
~ Pick-up roller, paper feed roller, and separation roller are running.

– Transpor t roller rotating

• Paper reaches the transport roller
~ Paper stop switch-2 (S14) is turned on. After a set amount of time , the feed clutch (CLT3 or 5) is

turned off.

* Paper reaches the aligning roller. Paper stop switch-1 (S7) is turned on.

~ Aligning operation

After a set amount of time, the feed roller stops rotating (CLT1).

(3) Carriage operation

• Exposure lamp is turned on.
Carriages -1 and -2 scan in a forward direction
~ Scanning motor (M15) is turned on. At this time , if the toner density of the de v eloper material is

lower than the set value, the copier enters the toner supply operation.
~ Toner motor (M9) is turned ON.

(4) A set time lag after the carriage operation;

aligning clutch (CLT2) is turned on:
~ paper is sent to the transfer unit.
The counter is increased by 1.

(5) Termination of carriage scanning.

• Scanning motor (M2) is turned off.

• Main charger and exposure lamp are turned off.

• Aligning clutch (CLT2) is turned off. (Timing of shutting off depends on paper size.)

(6) Exit operation

• Exit switch (S9) detects the passing of the paper trailing edge.

• Main motor (M1), transfer and separation chargers, transfer bias, discharge lamp, and LED
eraser array are turned off.

• Optical fan motor (M6, M12) stop, and bottom fan motor (M8) and exit fan motor (M7) are running
at low speed.

• Carriages and indicators move to the position indicating copy area.

• The copier enters the standby mode.

2060, 2860/70 OPERATION 4 - 2 Dec. 1996 © TOSHIBA

Dec. 1996 © TOSHIBA 4 - 3 2060, 2860/70 OPERATION

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3560/70 S/M

MAIN-MOT

SCN

RGT

EXIT-SW

EXPO

HVT-M

Transfer

OFF

0.1

0.1

FWD

0.72

1.02 2.12 3.95 5.05
ON ON

0.44 2.13 3.37
ON ON

0.71
ON

1.37

BWDBWD

ON

2.03

2.35 4.10

2.10
High

OFF

CW

4.913.772.411.990.840.2

3.64 4.96
ON

BWDFWD

5.06

5.034.30

5.29

High

5.34

7.10 8.50 8.53

CCW

5.753.932.82
ON

OFF

6.85

Separation

Guide bias

OFF 0.1

1.47

2.46

4.10
High

4.40

ONON

Timing chart for two A4 actual-size cassette feeding

5.40

5.224.142.291.20

LOWLOW

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4.2.4 Bypass-feed copying

(1) A sheet of paper is inserted through the bypass guide

• Manual feed switch (S6) is turned on.

(2) PRINT key is pressed

• The main transfer and separation chargers, transfer bias, discharge lamp, and LED eraser array
are turned on.

• Optical fan motor (M6, M12), bottom fan motor (M8) and exit fan motor (M7) are running at high
speed.

• Main motor (M1) is turned on
~ Drum, developer unit, transport belt, heat roller, and exit roller are running.

(3) Sheet-bypass feeding

• Manual feed clutch (CLT4) is turned on
~ Manual feed roller is lowered.
~ Manual feed roller, paper feed roller, and separation roller are running.

– Aligning operation –

• Paper reaches aligning roller
~ Paper stop switch1 (S7) is turned on.

After a set time lag, the manual feed clutch (CLT4) is turned off and paper feeding is terminated.

(4) Same as operation (3) through (6) of “4.2.3 Automatic Feed Copying Using the PRINT key”.

4.2.5 Interrupt copying

(1) The INTERRUPT key is pressed.

• Interruption LED is turned on.
The copying operation is temporarily halted and carriages-1 and -2 return to their home position.
The copying mode is set to automatic exposure and 1-to-1 reproduction ratio. Register remains
unchanged.

(2) The preferred copying modes are specified.
(3) After interrupt copying is terminated when the INTERRUPT key is pressed again, the interrupt LED

goes off and the copier returns to the conditions before the interruption.

(4) PRINT key is pressed

The copying operation before the interruption is resumed.

2060, 2860/70 OPERATION 4 - 4 Dec. 1996 © TOSHIBA

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4.3 Fault Detection

If a fault occurs in the copier , a symbol corresponding to the type of fault will be displa yed in order to dr aw
the attention of the operator.

• Classification of faults
A) Faults which can be cleared without turning off the door switch (yellow flashing display on the

display panel).
(1) ADD PAPER
(2) BYPASS MISFEED
(3) INSERT KEY COPY COUNTER
(4) CASSETTE MISFEED

B) Faults which cannot be cleared without turning off the door switch (red flashing display on the

display panel).
(1) CLEAR PAPER
(2) ADD TONER (yellow flashing display)
(3) REPLACE TONER BAG

C) Faults which cannot be cleared unless the main switch (S1) is turned off.

(1) SERVICE CALL

A-1) ADD PAPER ( )

[In the case of the copier and PFP cassettes]

• When the cassette is not installed, the size switch (S5 or S15) detects the absence of the
cassette.

G

When the cassette is not installed.
When the cassette is installed but
there is no paper in the cassette.

6

4

7

4

8

~Size switches are all switched off.

Paper empty status.

ff

Signal sent to control circuit.

The ADD PAPER display will flash.
* The PRINT key will not function.

Dec. 1996 © TOSHIBA 4 - 5 2060, 2860/70 OPERATION

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[In the case of the LCF and the pedestal]
By combining the operation of the tray motor and the condition of the tray-up switch and the empty
switch, the CPU detects whether or not there is paper.

• When the power is turned on or when the LCF door is opened/closed (for the pedestal:
when the power is turned on or when the cassette is removed) ~
The PFC (Paper Feed Controller) causes the LCF to initialize.

ff

Detects whether or not there is paper

• Tray motor comes on ~ The tray rises.

f

At this time, both tray-up and LCF empty switches are off.

• A fixed time later, if the tray-up switch is not turned on:

The tray is
not normal

→

The “ADD PAPER” is displayed regard­less of paper being present or not.

↕

Removing/reinstalling the LCF or turning off/on clears this condition. (For the pedestal, turn
off/on the power.)

f

• Within a fixed time, the tray-up switch turns on:
~ The tray motor stops.
At this time, if the empty switch is on ~ It is determined there is paper.
At this time, if the empty switch is off ~ It is determined there is no paper.

f

The “ADD PAPER” is displayed.

• During copying, sheets of paper are fed and when the paper supply becomes low →
The tray-up switch goes off → The PFC turns on the tray motor ~ The tray moves up.
The tray-up switch come on → The tray motor stops.

• During copying, when the empty switch goes off despite the tray-up switch being on

fff

It is determined there is no paper.

“ADD PAPER” is displayed.

Copying stops.

2060, 2860/70 OPERATION 4 - 6 Dec. 1996 © TOSHIBA

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A-2) BYPASS MISFEED ( )

• During sheet bypass copying

14443

The manual feed clutch (CLT4) has been tur ned on

f

The paper-stop switch-1 (S7) comes on
* If the paper-stop switch-1 (S7) does not come on within the specified time:

fff f

BYPASS MISFEED

The BYPASS MISFEED symbol is displayed

Copying cannot be started

Clearing method: Remove the paper from the sheet-bypass guide. The manual-f eed switch

(S6) goes off.

A-3) INSERT KEY COPY COUNTER ( )

• If the copy counter (optional) is installed in the copier and is then withdrawn:
The INSERT KEY COPY COUNTER display appears

f

Copying is not possible

• If the counter is withdrawn during copying, the machine will stop after the paper being copied
has exited.

B-1) CLEAR PAPER ( )

• Leading-edge jam detection by the exit switch (S9): (E01)
The aligning clutch (CLT2) is turned on

ff

1.875 sec.*
The exit switch (S9) comes on
* When the exit switch (S9) has not come

on after 1.875 seconds have elapsed.

The CLEAR PAPER symbol (E01) ap­pears and copying will stop.

f

Aligning motor

Exit switch

Timer

On

On

0

1.875 sec

CLEAR PAPER (E01)

Dec. 1996 © TOSHIBA 4 - 7 2060, 2860/70 OPERATION

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•

• Immediately after power on

T railing-edge detection b y exit switch (S9): (E02)
Aligning clutch (CLT2) goes off.

↓ 1.92 sec*
The exit switch (S9) goes off (detects pa­per exit)
* When the exit switch (S9) does not go

off even after 1.92 seconds:

↓

The CLEAR P APER symbol appears (E02),
and copying stops.

↓

Exit switch (S9) is detecting paper (on)

↓

Aligning motor

Exit switch

Timer

Off

On

0

CLEAR PAPER (E02)

1.92 sec

CLEAR PAPER (E03)

• If the front cover is opened during copying

↓

CLEAR PAPER (E04)

• Leading edge jam detection by the paper stop switch in front of the aligning roller:
After the leading edge of the paper passes the transport rollers, if the paper stop switch-1 (S7)
is not turned on within a fixed time

↓

Paper misfeeding (E05)

• During paper feeding from the ADU:
After the feed clutch is turned on, if the paper stop switch (S16) does not come on within a
fixed time.

↓

Paper misfeeding (E11)

• During paper stacking in the ADU:
If the ADU jam switch (SA4) does not detect any paper at the fixed timing

↓

Paper misfeeding (E08)

2060, 2860/70 OPERATION 4 - 8 Dec. 1996 © TOSHIBA

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• During paper feeding from the copier and the pedestal:
After the feed clutch is turned on, if paper stop switches (S7/S16) do not come on within a fixed
time

↓

Paper misfeeding (E13 – E19)
E13 – E19: The error code is different according to the cassette used.

B-2) ADD T ONER ( )

Toner density has become low

↓

Toner empty detection: Auto-toner sensor

↓

Control circuit: f the ADD TONER symbol appears: copying is not possible
Clearing method: Replace the toner cartridge and close the front cover.

Toner supply operation: copying is possible

B-3) REPLACE TONER BAG ( )

The toner bag becomes full of toner

↓

The toner-recovery auger moves towards the rear of the copier: toner-full switch (S13) will be
turned on.

↓

REPLACE TONER BAG display

• When the toner-full switch (S13) comes on during copying

↓

Copying will stop after the last sheet has exited during copying
Clearing method: Replace with a new toner bag.

C-1) Service call

If the CLEAR/STOP key and the “8” key are pressed simultaneously when the SERVICE CALL symbol
symbol is flashing, one of the error codes will appear on the message display.
For the contents of the error codes, refer to the “SERVICE HANDBOOK”.

Dec. 1996 © TOSHIBA 4 - 9 2060, 2860/70 OPERATION

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4.4 Flow Charts

4.4.1 Power on to ready

Restart

Main switch on

DC power on

YES

Cover open?

NO

Heater lamp HTR ON

• SCN-MOT

• LNS-MOT

• MRR-MOT

• DCM-MOT

• STOP-MOT

• GUIDE-MOT

P-STP-SW

ON?

Start initialization

1444442444443

YES

NO

EXIT-SW ON?

NO

ADU-JAM-SW

YES

YES

ON?

NO

Paper jam

"E03"

A

2060, 2860/70 OPERATION 4 - 10 Dec. 1996 © TOSHIBA

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3560/70 S/M

NO

A

T-FUL-SW

ON?

NO

Toner empty?

YES

Toner replen-

ishment

Initialization

over?

NO

YES

NO

Main motor

6 sec. ON

T-FULL SW

ON

(Toner-full removal

operation)

YES

Toner bag

replacement

NO

Have 20 sec.

passed since start

of initialization?

YES

Service call

“C21”or “C22” or “C23”

YES

• Lens and mirrors posi­tioned for specified
reproduction ratio

• Carriage and indicator
indicate copy area

Is heat roller

pre-running sufficient

for fixing?

YES

Main motor ON
Pre-running operation
starts

NO

Have 15 sec.

passed

NO

Is the

thermistor

open?

YES

Service call

“C41”

NO

YES

Main motor OFF
Pre-running stops

READY

Dec. 1996 © TOSHIBA 4 - 11 2060, 2860/70 OPERATION

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3560/70 S/M

4.4.2 Automatic feed copying

PRINT key

Transfer charger on
Separation charger on
Discharge lamp on

Process control

All LEDs of the LED eraser array on

Main charger on

LED eraser array off

All LEDs of the LED eraser array on

Main charger off

All LEDs of the LED eraser array off

NO

Is number

of remaining copies

zero?

YES

Transport control

for main motor

Feed motor on

Feed motor off

Aligning motor on
Counter on
Scraper solenoid on

Counter off

Scraper solenoid off
Aligning motor off

NO

remaining copies

PLL check

OK?

YES

Is

number of

zero?

YES

NO

Service call

"C01"

YES

Optical section control

Carriage moves to
home position

Exposure lamp on

Carriage advances

Carriages stops

Exposure lamp off

Is number

of remaining copies

zero?

NO

Carriage retreats to home
position

Process control end

Exit switch

check 1

OK

NG

B

2060, 2860/70 OPERATION 4 - 12 Dec. 1996 © TOSHIBA

Copying area indicated

Optical section

control end

Paper jam

"E01"

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3560/70 S/M

B

Paper jam

“E02”

NG

Exit switch

check 2

Transfer changer OFF
Separation charger OFF
Discharge lamp OFF

Drum rotation reversed

Standby

OK

Dec. 1996 © TOSHIBA 4 - 13 2060, 2860/70 OPERATION

5. DISPLAY UNIT

The display unit consists of key switches for copier operation/selection of each mode, LEDs and an LCD
displaying the copier state or messages.
Particularly, when the operator’s attention is recommended, a graphic symbol lights or flashes and the
message indicating that condition is displayed.

5.1 Detailed Drawing of the Control Panel and the Display Panel

For the U.S.A. and Canada

For Europe

STAPLE 2 in 1

SORT

GROUP

SORTER DUPLEXADF

READY

PREV. HELP YES NO

SADF

ADF

CASSETTE

IMAGE MODE

LIGHT AUTO DARK

READY

PREV. INFO YES NO

100%LT

ENERGY SAVE INTERRUPT

123
456
789

C

0

100%A4

/

CLEAR/STOP

200%

100%

ZOOM

FUNCTION CLEAR

PRINT

100%

123
456
789

C

0

/

50%

FC

200%

ORIGINAL

LD

LG

LT

ST

OTHER

AMS APS

ORIGINAL

50%

FC

UNIV

AMS APS

Arrangement of the control panel

For the U.S.A. and Canada For Europe

COPY SIZE

A4

A3

B4

B5

M1
M2

USER SET

COPY

USER SET

JOB MEMORY

SET RECALL

M1
M2

MODE MEMORY

SET RECALL

LEFT RIGHT BOOK

EDGE ERASE DUAL PAGE

LEFT RIGHT BOOK

EDGE ERASE DUAL PAGE

IMAGE SHIFT

IMAGE SHIFT

CASSETTE

Details of the display panel

Dec. 1996 © TOSHIBA 5 - 1 2060, 2860/70 DISPLAY

5.2 Items Shown on the Display Panel

5.2.1 Display during normal copying

No. Message Conditions of machine Notes

1 WAIT WARMING UP Being warmed up • The number and reproduction ratio

• Indicated after the main switch
is switched on up until the example, as “0”, “100%” when the
machine becomes capable of main switch comes on.
copying.

2 READY Capable of copying. •

• Indicated when the machine is “1”. When a digital key is pressed,
capable of copying and the the set number is indicated.
operator’s instructions for •
copying conditions are awaited. pressing the CLEAR/STOP key.

• Returns to the initial condition •Manual copying is possible.
if no key input is given for 45
seconds.

3 COPYING Now copying. •

• Indicated by pressing the quantity indicator returns to the
PRINT key. initially set number.

•

Copy quantity indicator becomes
“1” and copying is completed.

4 SAVING ENERGY Energy saving conditions. •

PRESS PRINT

5 PLACE NEXT ADU 1-sided copying standby •

ORIGINAL state. C below. not using ADF.

of the copies are indicated, for

Copy quantity indicator indicates as

The set number is cleared to “1” by

After completion of copying, the copy

Released by pressing the ENERGY
SAVER key or the PRINT key.

When using ADU 1-sided, and when

In case of lateral paper feeding, the symbol A lights up and for longitudinal feeding, the symbol B lights
up on the display panel.

C

BA

2060, 2860/70 DISPLAY 5 - 2 Dec. 1996 © TOSHIBA

5.2.2 Display in the event of faulty conditions

No. Message Abnormal state & indication Solution

6 ADD PAPER Indication of lack of paper. • Supply paper to the selected

•

Indicates when there is no paper
in the cassette. (A below.) • Select another cassette.

• Indicates which cassette has no
paper. (E below.)

• Manual copying is possible.

7 ADD TONER: Indication of lack of toner. •

• B below is indicated when and the front cover is closed.

PRESS INFO the toner in the toner cartridge

runs out.

•

When this message is displayed,
it is not possible to copy.

8 INSERT Key copy counter withdrawn. • Released and returned to normal

• Indicated when the key copy conditions by inserting the key

KEY COPY COUNTER

9 DISPOSE OF Indication of need to replace the Open the front cover and replace

USED TONER • Indicated when the toner bag is

counter is withdrawn when the copy counter.
machine is READY or during
copying. C below.

• When it is removed after
pressing the PRINT key, the
machine stops after that copy is
completed, but the counter
counts it.

toner bag. the toner bag.

full. D below.
The copier stops.

cassette.

Released after the toner is supplied

D

B C

AE

Dec. 1996 © TOSHIBA 5 - 3 2060, 2860/70 DISPLAY

No. Message Abnormal state & indication Solution

10 PAPER MISFEED Bypass paper jamming The machine is returned to normal

• Indicates when paper jams at conditions automatically by pulling

IN BYPASS the bypass guide. A below.

11

MISFEED IN COPIER

PRESS INFO the machine. B, C, D and H copier following the message.

12 MISFEED Original jammed Open the ADF feed cover and

IN DOC. FEEDER jammed in the optional

13

MISFEED IN SORTER:

PRESS INFO

14 MISFEED IN ADU: Indicates when paper is jammed

PRESS INFO copier following the message.

Paper jammed in the machine. • Press the HELP (INFO) key and

• Indicated when paper jams in remove the paper jammed in the

below.

• Indicated when an original is remove the jammed original.

document feeder. E and F
below.

Paper jammed in the sorter. Remove the paper jammed in the

• Indicates when paper is jammed sorter and open and close the front
in the sorter. G below. cover once.

in the ADU section. I below.

the paper out from the bypass guide.

Press the HELP (INFO) key and
remove the paper jammed in the

B
G
I

E

F

C

A

D

H

2060, 2860/70 DISPLAY 5 - 4 Dec. 1996 © TOSHIBA

No. Message Abnormal state & indication Solution

15

CALL FOR SERVICE:

PRESS INFO abnormal. A below. machine back on.

16

TIME FOR PERIODIC

MAINTENANCE periodic maintenance and

Some or one of the mechanism, Turn off the machine, remove the
motors, switches or sensors are cause of the fault and turn the

Indication of PM cycle. Maintenance and inspection by a

• Indicated when it is time for qualified service technician.

inspection.

• Capable of copying.

A

Dec. 1996 © TOSHIBA 5 - 5 2060, 2860/70 DISPLAY

5.3 Relationship between Copier Conditions and Operator’s Actions

Sheet

bypass

key

SHIFT

IMAGE

key

PAGE

COPY

DUAL-

key

EDGE

ERASE

key

SAVER

ENERGY

key

RUPT

INTER-

key

CASSETTE

SELECTION

SIZE

COPY

SIZE

ORIGINAL

key

EXPOSURE

RATIO

REPRO-

DUCTION

keys

Digital

STOP

CLEAR/

key

PRINT

key

key

key

selection

key

– _____________

– _____________

Operation

During copying ......... Interruption of the copying (Stop function .....The copy quantity indicator will not change.)

Condition

Warming up – _____________

Ready ______________

Reproduction-ratio

changing

Copying – _ ––_ ––__ ––––_

Add paper – _____________

Add toner – _____________

Key copy counter not

inserted (optional)

Bypass misfeed ––––––––––––––

Replace toner bag – – ____________

Clear paper ––––––––––––––

Service call ––––––––––––––

Interrupt mode _ ––______ – _ – __

Energy-saving mode _ ––––––––_ ––––

_: Machine operates or indicates in accordance with the operator’s action. – : Operation is ignored.

2060, 2860/70 DISPLAY 5 - 6 Dec. 1996 © TOSHIBA

(1) By pressing the ENERGY SAVER key or the PRINT key, the energy-saving mode will be cancelled.

(2) During copying, avoid changing exposure as far as possible.

(3) The function of the CLEAR/STOP key changes in the following manner according to the machine status.

When not copying ....When pressed once, the copy quantity indicator returns to “1”.

(4) During copying, avoid sheet bypass feeding because of possible paper jamming.

Note: The interrupt mode will be automatically cancelled when the machine is not used for 45 seconds.

5.4 Description of Operation

5.4.1 Dot matrix LCD display circuit

(1) Structure

• Dot matrix LCD display circuit has a display ca­pacity of 40 characters (20 characters x 2 lines).

• 1 character is a unit consisting of ON/OFF lights
made of 35-element (5 x 7) dots.

(2) Drive Operation

• LED control: The LCD’s internal control driver drives.

• What character is displayed in what position: IC19 (main CPU), IC9 (HC244), IC37 (7407), and
IC18 (gate array) of the logic circuit control.

• Message data and executable programs are stored in the main PROM.

• The character codes are stored in the PROM on the LCD.

The main CPU divides the display bloc k into 4 b locks . The main CPU outputs the RAM address data
for the starting position at which each block is displayed and then outputs display data for the number
of characters (10 characters) to be displayed to the LCD. When the message is changed, the main
CPU outputs the display data for the blocks 1~4.

12

34

(4a)

When changing the display data only for the repro­duction ratio, the leading RAM address data in the
display position of the reproduction-ratio block (4a)

Display blocks

are first output and then the display data for the
number of reproduction-ratio characters (4 char­acters) are output to the LCD.

Dec. 1996 © TOSHIBA 5 - 7 2060, 2860/70 DISPLAY

AD15

~

AD0

IO10

IO17

A7

B7

~

A0

~

~

B0

DB7

~

DB0

O17

O14
O15

OE

244

Gate array

LCD-E

LCD-RS

E

RS

Main CPU

5.4.2 LED display circuit

(1) LED display method

For example, the following shows how the LED LP12 (APS) lights up for displaying “automatic paper
sensing”.

+5VD

R9

DSPON0

“L”

R11

Q2

R

(APS)

LP12

“L” 14

D10

R7

IC4

When DSPON0 signal becomes “L” lev el, tr ansistor Q2 is turned ON. Further, when IC4 pin14 (D10)
becomes “L” level, current flows from +5VD to LP12 (APS) through the transistor. In this way LP12
(APS) lights up.

2060, 2860/70 DISPLAY 5 - 8 Dec. 1996 © TOSHIBA

(2) The actual circuit is controlled as follows.

VDD

1000

R18

21

1000

R17

12

1000

R20

12

1000

R19

21

27

1

C4

2

CKME0.1/25

4
26
28

2

3
29

30

1
23
18
13

8

SGD

GND

4B3 4C8

R16

DSPDAT

4B3

DSPLTH

4B3

DSPRST

DSPCLK

4B3

1000

12

R15

1000

12

1

C6

2

CKM33P/50J

1

C7

2

CKM33P/50J

HC14

HC14

21

43

IC3

IC3

LAST
L/R
SIN
LATCH
BE0
STB
CK

VDD
VSSL
VSSD3
VSSD2
VSSD1
VSSD0

IC4

7932M

DSPON1

4B8

DSPON0

A-EXPO5
EXPO9-4
EXPO8-3
EXPO7-2
EXPO6-1

DSPOUT1
DSPCLK1
DSPLTH1

PHOTO

4B8

4C8
4C8
4C8
4C8
4C8
4B8

4C8
4C8
4C8

R2
100

12

LTL16KG
R3
100

P/3

12

LTL16KG
R4
100

P/2

21

LTL16KG
R5
100

P/1

12

6

D16

7

D15

9

D14

10

D13

11

D12

12

D11

14

D10

15

D9

16

D8

17

D7

19

D6

20

D5

21

D4

22

D3

24

D2

25

D1

5

SOUT

DSON1

4B3

DSON0

4B3

R6
100

21

R7
100

21

R12
100

21

R14
100

R13
100

21

R10

12

R11

LTL16KG

P/0

LTL16KG

P/USER

LTL16KG

APS

LTL16KG

USER/AJ

12

LTL16KG

EDGE

LTL16KG

DP

150

150

21

R8

R9

21

21

21

12

12

12

12

12

12

12

2200

21

2200

1

LTL16KG

LP7

LTL16KG

LP8

LTL16KG

LP9

LTL16KG

LP10

LTL16KG

LP11

LTL16KG

LP12

LTL16KG

LP13

LTL16KG

LP17

LTL16KG

LP18

1

3

Q2
2SA1428Y

2

LP1

LP2

LP3

LP4

LP5

LP6

LP16

LP15

LP14

3

Q1
2SA1428Y

2

21

O/3

12

O/2

12

O/1

12

O/0

12

O/USER

12

AMS

12

MSB

12

MSR

12

MSL

5VD

(14.2.1 Display Circuit (PWA-DSP) 1/4)

• The signals of DSPON0 and DSPON1 be­come “L” level by one turn every 8 msec.

DSPON0

8 msec 8 msec

Q2

OFFQ2ON

• Q1 (or Q2) is turned ON when DSPON0 (or
DSPON1) is “L” level.

DSPON1

Q1ONQ1

OFF

• LED ON/OFF signal from LGC is inputted
to the SIN (pin 26) terminal of IC4 through

DSPDAT

DSPDAT signal line. (Serial data)

• The LED ON/OFF signal is inputted to IC2
in serial is outputted to output terminals of
D1 – D16 in parallel.

D7

LP14

(example)

LP18

(example)

ON

ON ON

Condition of LED lighting

1 The transistor (Q1 or Q2) connected on the anode side of the LED is ON status.
2 Output connected on the cathode side of the LED is “L” level.

When the above conditions 1 and 2 are fulfilled, the LED lights.

Refer to the following names of the LED which are ON/OFF controlled by DSPON0/DSPON1 signals.

Dec. 1996 © TOSHIBA 5 - 9 2060, 2860/70 DISPLAY

Transmission

LP SIGNAL DSP-ON-0 LP SIGNAL DSP-ON-1 LC7932

order

1 5 DF/SINGL ADF single feeding 6 DF/MULT1 ADF multiple feeding IC1-6
2 38 CST1 Cassette selection (LCF) 35 PEMP1 Paper empty (LCF) IC1-7
3 22 CST2
4 23 CST3

Cassette selection (Copier-U)
Cassette selection (Copier-L)

17 PEMP2 Paper empty (Copier-U) IC1-9

18 PEMP3 Paper empty (Copier-L) IC1-10
5 24 CST4 Cassette selection (PFP-U) 19 PEMP4 Paper empty (PFP-U) IC1-11
6 25 CST5 Cassette selection (PFP-M) 20 PEMP5 Paper empty (PFP-M) IC1-12
7 26 CST6 Cassette selection (PFP-L) 21 PEMP6 Paper empty (PFP-L) IC1-14
8 27 O/YOKO Horizontal original 28 O/TATE Vertical original IC1-15
9 12 DFJ ADFJAM (Feeding) 29 DEJ ADFJAM (Exiting) IC1-16

10 15 SRVC Call service 11 SJ Sorter JAM IC1-17
11 30 TEMP Toner empty 13 EJ Paper existing JAM IC1-19
12 16 TFULL Toner full 31 RJ
13 33 KCTR Key copy counter withdrawn 36 TJ
14 32

ADUSTUCK

ADU stacking 14 ADUJ ADUJAM IC1-22

Paper feeding JAM (Before aligning)
Paper feeding JAM (After aligning)

15 37 PJ PFPJAM IC1-24
16 34 MJ Bypass JAM IC1-25

17 53 MAG2/G
18 53 MAG2/B
19 53 MAG2/A
20 53 MAG2/F
21 53 MAG2/E
22 53 MAG2/D
23 53 MAG2/C
24 53 MAG3/G
25 53 MAG3/B
26 53 MAG3/A
27 53 MAG3/F
28 53 MAG3/E
29 53 MAG3/D
30 53 MAG3/C

Copy quantity display (tens)
Copy quantity display (tens)
Copy quantity display (tens)
Copy quantity display (tens)
Copy quantity display (tens)
Copy quantity display (tens)
Copy quantity display (tens)
Copy quantity display (units)
Copy quantity display (units)
Copy quantity display (units)
Copy quantity display (units)
Copy quantity display (units

) 1 STAPLE Staple mode IC2-20
Copy quantity display (units)
Copy quantity display (units)

53 MAG1/G Copy quantity display (hundreds) IC2-6
53 MAG1/B Copy quantity display (hundreds) IC2-7
53 MAG1/A Copy quantity display (hundreds) IC2-9
53 MAG1/F Copy quantity display (hundreds) IC2-10
53 MAG1/E Copy quantity display (hundreds) IC2-11
53 MAG1/D Copy quantity display (hundreds) IC2-12
53 MAG1/C Copy quantity display (hundreds) IC2-14
52 AC All clear IC2-15
50 PS Energy saving IC2-16
51 INT Interruption IC2-17

4 2IN1 2IN1 IC2-19
2 SORT Sort mode IC2-21

3 GROUP Group mode IC2-22
31 7 ADU1 Duplexing (1 → 2) 8 ADU2 Duplexing (2 → 2) IC2-24
32 9 ADU3 Duplexing (2 → 1) 10 ADU4 Duplexing (Book → 2) IC2-25

33 IC4-6
34 *7 P/3 Paper size *1 O/3 Original size IC4-7
35 *8 P/2 Paper size *2 O/2 Original size IC4-9
36 *9 P/1 Paper size *3 O/1 Original size IC4-10
37 *10 P/0 Paper size *4 O/0 Original size IC4-11
38 *11 P/USER

Paper size (User adjustment)

*5 O/USER Original size (User adjustment) IC4-12
39 *12 APS APS *6 AMS AMS IC4-14
40 *13 USER/AJ User adjustment *16 MSB Margin shift (Book) IC4-15
41 *17 EDGE Edge erasing *15 MSR Right margin shift IC4-16
42 *18 DP Dual-page copying *14 MSL Left margin shift IC4-17
43 39 PHOTO Photo mode IC4-19
44 40 AUTO Automatic exposure 45 EXPO5 Exposure display 5 IC4-20
45 49 EXPO9

Exposure display 9 (D MAX.)

44 EXPO4 Exposure display 4 IC4-21
46 48 EXPO8 Exposure display 8 43 EXPO3 Exposure display 3 IC4-22
47 47 EXPO7 Exposure display 7 42 EXPO2 Exposure display 2 IC4-24
48 46 EXPO6 Exposure display 6 41 EXPO1 Exposure display 1 (L MAX.) IC4-25

IC1-20
IC1-21

Mark *: LEDs on PWA-DSP
No mark: LEDs on PWA-KEY

2060, 2860/70 DISPLAY 5 - 10 Dec. 1996 © TOSHIBA

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3560/70 S/M

6. DRIVE SYSTEM

6.1 Construction of Drive System

The drive system consists of a drum (cleaner unit), developer unit, transport belt, heat roller, exit roller,
transport roller, cassette feed roller and aligning roller.
The drive system is driven by the main motor.

6.2 Description of Operations

• Drum drive ......................... Main motor rotation is transmitted to the drum drive pulley via the timing

(Cleaner unit) belt, and drives the drum gear.

• Developer unit drive ........... Main motor rotation is transmitted to the developer unit drive gear via

the timing belt and the gear.

• Heat roller drive .................. Main motor rotation is transmitted to the heat roller gear via timing belt

and gears, and drives the heat roller.

• Transport belt ..................... Transport belt gear is driven by the heat roller gear via the idle gear.

• Exit roller ............................ Exit roller gear is driven by the heat roller gear via the idle gear.

• Aligning roller ..................... Main motor rotation is transmitted to the aligning roller clutch via the

timing belt and gears.

• Transport roller................... Main motor rotation is transmitted to the transport roller clutch via timing

belts and gears.

• Cassette feed roller............ Main motor rotation is transmitted to the cassette feed roller via timing

belts and gears.

Timing pulley of the
clamshell fulcrum
(TP24/TP30/G28)

Belt

(324 pitch)

Transport roller

(One-way clutch/TP15)
(One-way clutch/TP20)

(TP30/G28)

(G28)

Bypass feed roller
(Clutch/G28)

(G28)

(G28)

(G28)

Gear/Developer
unit drive gear

(G26)/(G23)
Belt
(324
pitch)

(TP24)(G24)

Arm fulcrum
gear (G26)

(G26)

Belt (324 pitch)

(G28)

Belt (258 pitch)

Lower transport roller
(Clutch/G28)(TP15)

Timing pulley/Drum
drive gear

(G20)

(TP40)

Aligning roller (Clutch/G28)

Aligning roller drive gear

(G32/G19)

Upper cassette feed roller
(Clutch/G28)

Lower cassette feed roller
(Clutch/G28)

(TP20))

Belt (248 pitch)

Belt

(324 pitch)

Drum

(G72)

Timing pulley

(G56/TP24)

Timing pulley

(G57/TP24/TP19)

Main motor
(G10)

Belt
(246 pitch)

Transport belt

Arm fulcrum gear

(G25)

(G20)

(G27/G19)

(G56)

(G35)

Heat roller

(G24/G18)

(G30)

(G20)

(G21)

ADU transport roller

(G20)

Exit roller
(G20)

(G22)

(G22)

Drive system (Rear side view)

Dec. 1996 © TOSHIBA 6 - 1 2060, 2860/70 DRIVE

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3560/70 S/M

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6.3 Disassembly and Replacement

[A] Clamshell fulcrum bracket and pulley

(1) Remove the upper rear cover and the upper

feed cover.

(2) Remove the clamshell fulcrum bracket (3

screws).
(3) Remove the 2 belts from the pulley.
(4) Remove the clamshell fulcrum pulley.

Clamshell fulcrum bracket

[B] Main motor

(1) Remove the main motor (2 connectors and 2

screws).

[C] Main drive unit

(1) Remove the drum tension bracket (1 screw).

Clamshell fulcrum pulley

Connectors

Connector

Belt

Main motor

Drum tension bracket

(2) Remove the shaft bracket (1 screw).
(3) Remove the main drive unit (connector and 5

screws).

Main drive unit

Shaft bracket

2060, 2860/70 DRIVE 6 - 2 Dec. 1996 © TOSHIBA

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[D] Main drive unit gears

(1) The developer-unit drive gear and the drum

drive gear are press-fitted to their shafts.

[E] Feed drive unit

(1) Remove the LCF connector bracket (2

Drum drive gear

Dev-unit drive gear

Fuser drive gear

screws).

(2) Remove the clamshell fulcrum bracket and the

feed roller bracket (3 screws) and then remove

the pulley and belt.

LCF connector bracket

Pulley

Belt

Dec. 1996 © TOSHIBA 6 - 3 2060, 2860/70 DRIVE

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(3) Remove the lower feed roller clutch (1 set-

screw).

(4) Remove the pulley and belt for the upper feed

roller (1 stop-ring).

Clutch

Set-screw

(5) Remove the feed drive unit (3 screws).

• This is easy to remove if the feed drive unit
is slanted.

Pulley

Stop-ring

Belt

Feed drive unit

2060, 2860/70 DRIVE 6 - 4 Dec. 1996 © TOSHIBA

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3560/70 S/M

6.4 Main Motor

6.4.1 Main motor drive

FG pulse

Phase V

Hall

element B

Photo­interruptor

Phase U

Hall element C

Reference frequency

(F-MOT-REF)

MAIN-CW/CCW

Control

MOT-BRK

signal

MAINMOT-ON

678

PLL-OK

Wave
shaping

Lock
protection
circuit

Phase
comparator

Speed
comparator

Difference

Difference

Voltage
detection
circuit

+

Rotation
control

Excitation
phase
switching
section

Rotor
position
detection

Phase W

Hall element A

Main motor (M1)

(1) The LGC transmits control signals for main motor rotation. (MAIN-CW/CCW: Direction of rotation,

MAINMOT-ON: Motor rotation command)
(2) The excited phase switching unit excites each phase on the main motor → Main motor runs.
(3) Hall elements A to C are used to detect the rotation position of the motor (or rotor).
(4) The excited phase switching unit switches the excitation for each phase.

(By repeating (2) through (4) above, the motor keeps running.)
(5) The FG pulse is generated by the FG pulse pattern and N/S magnets of rotor installed on the main

motor.
(6) The phases and velocities of the FG pulse and the reference frequency from the LGC are com-

pared, and the differences are added. Further to this are added the fluctuations in the supply volt-

age. (Signal generation)
(7) Changes the switching timing for the excited phase switching unit to match the signal amount ob-

tained in step (6).

i.e. control is done to equalize the FG pulse and reference frequency. → The main motor runs at a

constant speed. (Locked range state.)
(8) When the main motor enters the locked range state, the excited phase switching unit transmits the

PLL-OK signal to the LGC. (“L” level).
(9) When the MOT-BRK from LGC enters “L” level, the main motor rotation is braked, and when the

MAINMOT-ON signal enters “H” level, the main motor stops.

Dec. 1996 © TOSHIBA 6 - 5 2060, 2860/70 DRIVE

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6.4.2 Control signals

(1) MAIN-CW/CCW signal (LGC → MOT: Input)

Switches the rotation direction of the main motor. When this signal becomes “L” level, the main

motor rotates counterclockwise as viewed from the rear side, and drives the developer unit, drum,

heat roller, etc.
(2) PLL-OK signal (MOT → LGC: Output)

When the cycle of FG pulse deviation from the reference frequency is within fixed range, this state

is specified as lock range (normal rotation), and this PLL-OK signal becomes “L” lev el. Also , at this

time, the LED “LP1” light comes on.
(3) F-MOT-REF signal (LGC → MOT: Input)

This signal is a reference clock signal for the main motor to rotate at a fixed speed.
(4) MOT-BRK signal (LGC → MOT: Input)

When it becomes “L” level, the main motor rotation is broken down.
(5) MAINMOT-ON signal (LGC → MOT: Input)

This signal is main motor ON/OFF control signal, when it becomes “L” level, the motor rotates.

Signal level of motor circuit.

Signal “H” level “L” level
MAIN-CW/CCW CW CCW direction
PLL-OK Speed is out of the locked range. Locked range state.
F-MOT-REF Reference clock
MOT-BRK Brake OFF Brake ON
MAINMOT-ON Motor OFF Motor ON

* The signal names indicate a level in the connector J543, respectively.

2060, 2860/70 DRIVE 6 - 6 Dec. 1996 © TOSHIBA

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7. OPTICAL SYSTEM

7.1 Functions

In this copier, the surf ace of the original is directly exposed to light, and the reflected light is conducted to
the surface of the drum via the mirror, lens, and slit.
The whole original image is reflected on the drum surface through the light source being scanned from
the leading edge to the trailing edge.
This area where functions as above are performed is called the optical section, located at the upper side
of the copier.

Original width
indicator

Carriage 2

Carriage 1

Optical fan

Scanning motor

Original glass

Lens unit

Optical system (front view)

Mirror 6

Drum

Lens motor

Slit glass

Mirror motor

Mirror unit

Dec. 1996 © TOSHIBA 7 - 1 2060, 2860/70 OPTICAL

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7.2 Construction

The construction and purpose of the optical section are the followings:
(1) Original glass

The original is placed on this glass. Light from the exposure lamp exposes the surface of the origi­nal through this original glass.

(2) Carriage 1

Carriage 1 consists of the exposure lamp, reflector, mirror 1, thermofuse, and light distribution
adjustment plates, etc. Carriage 1 is scanned by the scanning motor. The relation between the
scanning speed and the drum rotation speed is specified as follows. In actual-size copying, both
speeds are the same. The reproduction ratio of the direction of paper transport (lengthwise repro­duction ratio) is specified by this scanning speed being changed. In enlargement copying, the scan­ning speed is slower than the drum rotation speed, and in reduction copying it is faster.

Light distribution plates

Reflector

Mirror 1

a. Exposure lamp

The light source for exposing the original to light.

b. Reflector

The reflection plate for using the exposure lamp effectively.
The sub-reflector is slit for optical path width cutting.

Original

Thermofuse

Exposure lamp

Glass

Sub-reflector

Mirror 1

2060, 2860/70 OPTICAL 7 - 2 Dec. 1996 © TOSHIBA

Reflector

Exposure lamp

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c. Mirror 1

The mirror for conducting the reflected light from the original to mirror 2 (mentioned later).

d. Thermofuse

Prevents the exposure lamp from an increase in temperature due to excessive lighting.

e. Light distribution adjustment plates

It is positioned to shield the light irradiated from the reflector on the surface of original, and adjusts the
light intensity.
If the positions for the installation of this adjustment plate at the front or rear side are shifted, and the
light intensity is different at both sides, this may cause uneven light distribution.

(3) Carriage 2

Consists of mirror 2 and 3, conducts the reflected light from mirror 1 to the lens via mirror 2 and 3.
This is also scanned by the scanning motor in the same way as carriage 1.
The scanning speed is half that of carriage 1.
(The scanning distance is also half.)

Mirror 3

Carriage 2

Mirror 2

Dec. 1996 © TOSHIBA 7 - 3 2060, 2860/70 OPTICAL

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(4) Lens unit

It is driving by the lens motor. The reflected light from mirror 3 is reversed at the lens focus, and
conducted to mirror 4 (mentioned later).

Lens

Lens unit

(5) Mirror unit

The mirror unit consists of mirror 4 and 5, and conducts the reflected light passing the lens to mirror
6 via mirror 4 and 5. This is driven by the mirror motor. Changing of positions of the lens unit and
mirror unit alters the reproduction ratio of the vertical direction of paper transport (lateral reproduc­tion ratio).
When the distance of the light path is equal between the original surface and the lens focus and the
lens focus and the drum surface, actual-size copying is obtained.
When the former is longer, reproduction copying is performed, and when shorter, enlargement
copying.

Mirror 5

Mirror 4

Mirror unit

2060, 2860/70 OPTICAL 7 - 4 Dec. 1996 © TOSHIBA

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(6) Mirror 6

Conducts the reflected light from mirror 5 to the slit.

Mirror 6

(7) Slit (glass)

The sub-reflector performs slit functions therefore the slit glass only protects the optical section
from toner dust, etc.

(8) Copy-area indicator unit

This is located inside the original scale. This is f or indication of the maximum area in which the cop y
can be made at that time.
The indicator is driven by the document motor. The original range is indicated with the copy-area
indicator and orange line on carriage 1.

Carriage 1

Copy area
indicator

Original scale

Original glass

Original range where a copy
can be made

Dec. 1996 © TOSHIBA 7 - 5 2060, 2860/70 OPTICAL

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7.3 Description of Operation

7.3.1 Scanning motor

Carriage drive wire

Pulley

Carriage 1

Carriage 2

Pulley

(Rear side)

Tension spring

Pulley

Scanning motor

Pulley

The scanning motor rotation is transmitted to carriages 1 and 2 via the timing belt and the carriage drive
wire. Carriage 1 and 2 are first moved to home position. The home position is detected when carriage 1
passes the home switch. When the PRINT key is pressed, carriages 1 and 2 scan the original.

7.3.2 Mirror motor/lens motor

Mirror motor

Lens motor

2060, 2860/70 OPTICAL 7 - 6 Dec. 1996 © TOSHIBA

Mirror unit

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Lens motor

Mirror motor

Gear (G18)…motor axis

↓

Gear/pulley (G88/TP16)

↓

Timing belt (pitch length: 810)

↓

Lens unit

Gear (G18)…motor axis

↓

Gear (G88/G10)

↓

Rack gear (G22)

↓

Mirror unit

Immediately after the power is switched on:

• If the lens/mirror switch is on, the lens unit is transported to the exit side. Then the mirror unit is
transported to the feed side, and it is positioned for actual size copying.

• If the lens/mirror switch is off, the switches are turned on by the lens unit, then the mirror unit in that
order and both units are positioned for actual-size copying.

When the reproduction ratio is selected, the lens unit and the mirror unit are positioned accordingly using
the actual-size position as the starting (standard) position.

7.3.3 Document motor

The front and rear copy area indicators are set at home position, that is, for maximum width, via the
timing belt. When the paper size or reproduction ratio is changed, the indicators are positioned for the
specified size and the original setting position is indicated on the glass.

7.3.4 Optical fan motor

Stops during standby and rotates during copying, and cools the optical section.

Dec. 1996 © TOSHIBA 7 - 7 2060, 2860/70 OPTICAL

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3560/70 S/M

7.4 Pulse Motor Drive

7.4.1 Pulse motor drive circuit (constant current type)

The scanning motor (M2) is driven by hybrid IC STK6713BMK4 of the unipolar constant current chopper
drive. The driving circuits of A and A phases are shown below. Since B and B phases are exactly the
same, they are omitted here.

+24V

i

ONiOFF

R51

V

DD

A

A

62353

R55

187

D/A DADAT

G/A

R58

A

A

V

CC2

213

øA
15

øA13Td18V

ref

9

IC15

F1

C24

F2

IC2

IC2

IC2

IC2

D

Internal equivalent circuit of STK6713B

R1

IC1

C

C1
R3

—
+

D1

E

B

R5

A

R7

PG 4

5

DG

GND

The circuit configuration on the inside of the IC is composed of each phase excitation switching section
(IC2), driver (F1, F2), comparator (IC1), and current detection resistor (R7).
The following explains the circuit operation when the A phase is excited.

2060, 2860/70 OPTICAL 7 - 8 Dec. 1996 © TOSHIBA

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– Process when the A phase is excited –

1 øA phase becomes “L” level (øA is “H” level).
2 Reverse input E of the comparator (IC1) is applied the reference voltage which depends on the

resistance divided voltage of the R51, R55, and the R58.
Non-reverse input B is “L” level. Therefore, the output C of IC1 becomes “L” level.

3 According to step 1 and 2, D of IC2 becomes “H” level, and F1 is turned ON. (conductive condi-

tion).

4 Current flows into the coil A from the power supply of +24V, and it gradually increases.
5 The terminal voltage of the current detection resistor R11 increases, and C becomes “H” le v el and

F1 goes OFF from the moment when voltage B becomes higher than voltage E.

6 Because the winding method of coil A and A is bipolar winding, the energy stored in coil A is induced

in coil A, and is discharged using the coil A.
That is, A current flows in direction of DG (Drive Ground), R7, F2 diode and coil A.

7 When the voltage stored in the condenser C1 lowers, and becomes lower than voltage E , C

becomes “L” level and F1 comes ON again, and winding current of A phase increases.

8 In this manner, the ON/OFF operation of the motor current (constant current chopping operation) is

repeated.

I

OH

=1.25(A)

0 (A)

Motor input current waveform

In the case of the excitation of A phase, øA becomes “L” level and F2 comes ON, the same operation is
performed.

The limit of winding value is changed in high torque and low torque by the D/A output. In low torque the
current is lower, in high torque the current is higher.

Low torque : IOH= 1.0 – 1.15 (A)
High torque: IOH= 1.25 (A)

Dec. 1996 © TOSHIBA 7 - 9 2060, 2860/70 OPTICAL

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VCC2

1A2

A

3

øA
15

øA13Td1

8

Vref9Vref

11

Td210øB

14

øB

16

B
7

B6PG4SG

5

NC

12

F1 F2

IC2

IC2 IC3

IC3

IC2

IC2

IC1 IC1

IC3

IC3

C1

R3

C2

R4

R1

+

—

+

—

R2

R7

R5 R6

R8

D1 D2

F4 F3

SUB

+

—

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Waveform time chart of each section

1

øIN

A

B

C

0

Ec

Ec: C1 discharge voltage

oh

I

0(A)

ref

V

VOI

D

I

OFF

I

ON

Equivalent circuit

reg

0(V)

0(A)

0(A)

2060, 2860/70 OPTICAL 7 - 10 Dec. 1996 © TOSHIBA

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7.4.2 Pulse motor drive circuit (constant voltage type)

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Lens motor (M3) (LNS-MOT) ~Dr iven by IC3 (Logic PC board: TD62308F)

8

4

Mirror motor (M4) (MRR-MOT) ~Driven by IC4 (Logic PC board: TD62308F)

7

4

6

Document motor (M11) (DCM-MOT) ~Driven by IC2 (Logic PC board: TD62308F)

DA DA

Phase A

DC

24V

Phase A

QA QA

In the case of 2-phase excitation, the figure on the
right shows the signals applied to the base of tran­sistors QA, QB, QA, and QB.
An ON/OFF combination of the transistor is
switched.

The combination of the current flowing phases is
switched.

→→

Phase B

DB DB

Phase B

QB QB

TD62308F

A

ON ON

B

A

ON ON

ONON

The motor rotates.

Dec. 1996 © TOSHIBA 7 - 11 2060, 2860/70 OPTICAL

B

ONON

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7.5 Exposure Control Circuit

7.5.1 Introduction

The exposure control circuit is composed of four blocks as follows.
1 Lamp regulator Applies a pulse duty ratio corresponding to PWM signal

to the exposure lamp.

2 Automatic exposure sensor circuit Generates an AES signal indicating the density of the

original by sensing the light reflected by the surface of
the original.

6448 648

3 Exposure step Detects the exposure position set by the operator’s key

input

648

4 Arithmetic and control unit Determines the lamp voltage by computation on the

basis of AES and exposure step , and outputs the PWM
signal to the lamp regulator.

6448

Note: The ON/OFF state of the exposure lamp is controlled by a special signal (EXPON; J2-A18),

distinct from the PWM signal.

Original

Exposure lamp

Lamp

regulator
Automatic exposure
sensor circuit

PWA-AES

Control Panel

AES signal

Arithmetic and control unit
PWA-LGC

*PWM signal

Gate array
(IC18)

Main CPU
(IC19)

RAM

Key input

2060, 2860/70 OPTICAL 7 - 12 Dec. 1996 © TOSHIBA

(IC30)

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The exposure control circuit has the following two functions:

A Manual exposure mode ..................A constant lamp voltage corresponding to the set exposure

step on the exposure lamp is applied.

B Automatic exposure mode ..............The quantity of light reflected by the surface of the original,

which varies infinitely with the lightness and darkness of
the surface of the original, is detected by the automatic ex­posure sensor circuit, and the voltage applied to the expo­sure lamp is continually varied accordingly; a high lamp
voltage being impressed for dark originals and a low lamp
voltage for light originals.

7.5.2 Operation of lamp regulator

A typical characteristic curve is shown in the following diagram.
By means of a phase-angle control system, a lamp voltage corresponding to the PWM pulse duty
ratio input is generated even if some fluctuation occurs in the AC input voltage.

Lamp voltage

190/95 V approx.
170/85 V approx.

76/38 V approx.

100 V series
200 V series

Range of actual use

Range of actual use

40 % 90 %

[Characteristic curve of the lamp regulator]

Limiter voltage

PWM pulse duty ratio [%]

Dec. 1996 © TOSHIBA 7 - 13 2060, 2860/70 OPTICAL

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7.5.3 Automatic exposure sensor circuit

By the action of IC1, the incidence of light upon photocell PD1 is generated as an AES signal on J1­B13 (PWA-LGC).
Dim reflected lightf Small AES output
Intense reflected lightf Large AES output

7.5.4 Arithmetic and control unit

The arithmetic and control unit is composed of the following four blocks.
1 AD converter

The AES signal is input into the analog input terminals of the CPU (IC19) and converted to
digital.

2 SRAM with built-in battery (BC-RAM)

Consists of IC30, which stores exposure adjustment data to ensure that optimum exposure is
performed for each reproduction ratio and for automatic exposure.

3 Main CPU (IC19)

Incorporates software which computes the voltage to be applied to the lamp in accordance with
the copying mode, such as enlargement/reduction, automatic exposure, and manual exposure,
and the adjustment data in BC-RAM.

4 PWM timer circuit

Consists of the circuit shown in figure below.
The data resulting from the computation performed by the CPU described in item 3 above, are
converted to PWM signals by the gate array, and output to J2-A17 via IC10 from the PWM
output terminal of the gate array.

Gate array

PS-LRG

7407

PWM

IC10

Lamp regulator

2060, 2860/70 OPTICAL 7 - 14 Dec. 1996 © TOSHIBA

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7.5.5 Lamp regulator circuit

The lamp regulator monitors the AC input voltage to control the exposure lamp to a fixed intensity.
(Method) • The AC input voltage is detected.

fff f=

• The waveform rectifying circuit rectifies the AC input voltage to a DC voltage approxi­mated to the effective value of the input voltage.

• This DC voltage and pulse signal are rectified, and compared with the reference voltage
and amplified.

• According to the output, the trigger pulse generation circuit generates a trigger pulse
synchronous with the power source frequency.

• The energization angle of the triac is controlled.

Makes the voltage at both ends of the lamp constant.

Waveform
rectifying circuit

Trigger pulse
generation
circuit

Differential
amplifier

(PWM)
Pulse signal

Pulse
waveform
rectifying circuit

Reference pulse signal
setting circuit

Exposure lamp

Dec. 1996 © TOSHIBA 7 - 15 2060, 2860/70 OPTICAL

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7.6 Automatic Original-Size Detection Circuit

This circuit detects the original size (standard sizes only) using the 3-beam type reflecting photosensor
and 2 – 3 reflecting photosensors (3 for A4 series, 2 for LT series) on the base frame of the optical unit.

7.6.1 Principle of original-size detection

Original glass

Original

On the base frame of the optical unit, the reflecting
photosensor (3-beam type) and 2 – 3 reflecting
photosensors (3 for A4 series, 2 for LT series). Each
photosensor consists of an infrared light emitting
diode (light-emitting side LED) and a phototransistor
(light-receiving side). When an original is placed
on the original glass, the light emitted by the LEDs
is reflected by the original and led to the
phototransistor. In this way, the presence or ab­sence of an original is detected by whether reflected
light exists or not.

APS-0~2

APS-R

(Reflecting photosensor)
This sensor does not exist in the
LT series.

APS-F

(Reflecting photosensor)

APS-C

(Reflecting photosensor)

(Reflecting photosensor (3-beam
type))

7.6.2 Original size detection

(1) If the copier is set in the original size detection mode, the carriage is set at its home position.
(2) Detection is performed in an instant when the original cover is opened, each sensor receive the

reflecting light and the condition of a matrix shown in (4) are satisfied.

(3) Original size detection is performed when the output signals from each sensor are input to the gate

array (IC18) and the main CPU (IC19). IC18 and IC19 are on the logic PC board.

DD

V

IN32

IN31

IN30 IC18

PD3
PD1
PD2 IC19

GND

PWA-LGC

Gate array

Main CPU

Reflecting photosensor

Reflecting multi-beam
sensor

14444244443

APS-R

APS-C

APS-F

1

4

42

APS-2

4

APS-0

43

APS-1

Original size detection circuit

197

196

195

128
130
129

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A4 series

Paper exit side

LT series

A4

B5

A5

A5-R

APS-2

APS-1

APS-0

APS-R

“•” are detection points for each sensor

Sensor detection points

APS

-C

A3

B4

A4-R

B5-R

APS

-F

LDLT

COMP

LT-R LGST

ST-R

APS-2

ST-R

APS-1

ST, LT-R, LG

APS-0

LT, LD

APS-C

APS-F

(4) Original size is determined by a combination of the presence/absence of the original. Combination

charts for size determination of A4 series and L T series are shown below in input le v el at ports PD1
~ PD3 (Main CPU: IC19) and ports IN30 ~ IN32 (Gate array: IC18).
*LT series does not use IN32.

Dec. 1996 © TOSHIBA 7 - 17 2060, 2860/70 OPTICAL

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A4 series

Main CPU (IC19) Port Input Level

(APS-2) (APS-1) (APS-0) (APS-F) (APS-C) (APS-R) Original

PD3 PD2 PD1 IN30 IN31 IN32 size

HHHHHH

LLHHHHA5
LLLHHHB5
L H H H H H A5-R
LLLHHLA4
L * H H L H B5-R
L L H L L H A4-R
LLLLLHB4
LLLLLLA3

Gate array (IC18)

Original not exist

LT series

Main CPU (IC19) Port Input Level

(APS-2) (APS-1) (APS-0) (APS-F) (APS-C) Original

PD3 PD2 PD1 IN30 IN31 size

HHHHH

LLHHHST
LHHHHST-R
LLLHHLT
LLHHLLT-R
LLHLLLG
LLLLLLD

Gate array (IC18)

Original not exist

Note:

H: Original detected
L: Original not detected

*: H and L whichever is sufficient
Port input level (Main CPU: IC19, Gate array: IC18)

= Output level of each sensor

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7.7 Disassembly and Replacement

7.7.1 Original glass

(1) Remove the glass fix (2 screws).
(2) Remove the original glass in the direction of

the arrow.

7.7.2 Automatic exposure sensor PC board
(PWA-AES)

(1) Remove the original glass and move carriages

1 and 2 to the exit side.
(2) Remove the optical cover (2 screws).
Note: Be careful not to deform the black sheets

Glass fix

Original glass

Optical cover

of either side of the lens unit when moving
the lens unit with its optical cover removed.
Move the lens unit toward the paper feed
side to protect the black sheet when install­ing the optical cover.

(3) Remove the automatic exposure sensor unit

(1 screw).
(4) Remove the connector (1) and the screws (2)

and take off the PC board.

Automatic exposure sensor unit

Connector

Paper feed side

Dec. 1996 © TOSHIBA 7 - 19 2060, 2860/70 OPTICAL

Black sheet

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7.7.3 Optical fan (front)

(1) Open the front cover.
(2) Remove the inner cover (3 screws).
(3) Disconnect a connector and remove 2 screws.

7.7.4 Optical fan (rear)

(1) Remove the upper rear cover.
(2) Remove the connector (1) and the screws (2).

Optical fan (front)

Optical fan (rear)

7.7.5 Lens motor/mirror motor

(1) Remove the optical cover.
(2) Remove each motor (2 screws each).

Lens motor

Harness cover

Mirror motor

(3) Remove the each connector.

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7.7.6 Automatic paper-size detector

(1) Remove the original glass.
(2) Remove the 3 beams sensor. (2 screws, 1

connector).
(3) Remove the reflecting photosensors (1 scre w ,

1 connector).

Reflecting photosensor

3 beam sensor

[A4 series]

3 beam sensor

Reflecting photosensor

Reflecting photosensor

[LT series]

7.7.7 Exposure lamp and thermal fuse

(1)

Remove the original glass and the rear top cover.
(2) Move the carriage 1 to the position that the lamp

Exposure lamp

terminal is visible.
(3) Remove the exposure lamp while bending the

power supply blade. Attention should be paid

not to touch lamp surface. (It may lead to un-

even exposure.)
Note: When installing, position the lamp so that the

TOSHIBA mark faces to the front. Moreover,
the projection on the exposure lamp should
face to the exit side.

Exit side

Projection Reflector

Lamp

(4) To replace the thermofuse, remove the 2

Thermal fuse

[Front side]

[Rear side]

screws.

Dec. 1996 © TOSHIBA 7 - 21 2060, 2860/70 OPTICAL

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7.7.8 Copy area indicator unit

(1) Remove the left top cov er, the upper rear co ver

and the control panel.
(2) Remove the transparent indicator cover (2

screws).
(3) Disconnect the document motor connector.
(4) To take out the document motor, disconnect a

connector and remove the 2 screws.

Remove the belt.
Note: To install the belt, place both indicators

against the bracket projection and set the
belt in the groove on the indicator.

Document
motor

Original width indicator unit

Belt

7.7.9 Scanning motor

(1) Remove the upper rear cover.
(2) Disconnect the connector . Remove 2 scre ws ,

the tension spring, the wire drive belt, and the

scanning motor bracket.
Note: When installing;

1. Hang the tension spring on to the copi­er’s frame.

2. Hang the wire drive belt on the scanning
motor pulley and then the belt drive pul­ley. Attach the screws A and B tempo­rarily.

3. Hang the tension spring on to the scan­ning motor bracket.

4. Tighten the screws A and then B after a
proper tension is applied by the spring
while screws A and B are loosened.

Tension spring

Belt drive pulley

Scanning motor

A

B

Wire drive belt

2060, 2860/70 OPTICAL 7 - 22 Dec. 1996 © TOSHIBA

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(3) Remove the 3 screws and take out the scan-

ning motor.

Scanning motor

7.7.10 Home switch

(1) Remove the top left cover.
(2) Remove the connector and the 2 claws on the

bracket, then take out the home switch.

7.7.11 Platen switch

(1) Remove the upper rear cover and the rear top

cover .

(2) Remove the platen switch unit (2 screws).

Home switch

Connector

Claw

Platen switch

Dec. 1996 © TOSHIBA 7 - 23 2060, 2860/70 OPTICAL

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(3) Remove the platen switch actuator by press-

ing and turning it in the direction of the arrow
(arrows 1 to 3 ). Then remove the connec­tor and 2 claws.

Platen switch actuator

3

1

2

7.7.12 Carriage 1

(1) Remove the original glass, the left top cover,

the transparent indicator cover and the upper
rear cover.

(2) Remove the 2 brackets which attach carriage

1 to the wire (1 screw each).

Platen
switch

Wire fixing
bracket

Platen switch
claws

[Front side]

Home switch
claws

Wire fixing
bracket

[Rear side]

2060, 2860/70 OPTICAL 7 - 24 Dec. 1996 © TOSHIBA

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(3) Remove the cable for carriage 1 from the ca-

ble holder of carriage 2.

(4) Remove the cable holder.

Disconnect the connector.

Carriage 2

Cable

Cable holder

Remove the earth wire (1 screw).

(5) Tilt entire the unit of carriage 1 and pull it out

upwards.

Note: Adjustments are necessary when installing

carriage 1.

Connector

Cable holder

Earth wire

Carriage 1

Dec. 1996 © TOSHIBA 7 - 25 2060, 2860/70 OPTICAL

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7.7.13 Mirror 1

(1) Remove the carriage 1.
(2) Remove the plate springs (2) which fix mirror

1.

(3) Remove the mirror 1.

7.7.14 Lens unit

(1) Remove the lens cover.

Mirror 1

(2) Remove the upper exit cover and the left top

cover.
(3) Remove the cable guide (1 screw).
(4) Remove the lens/mirror drive unit.
(5) Remove the indicator unit.

(6) Remove the tension bracket (1 screw).

Cable guide

Tension bracket

2060, 2860/70 OPTICAL 7 - 26 Dec. 1996 © TOSHIBA

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(7) Remove the lens/mirror shaft bracket (1

screw).

(8) Remove the lens unit from the lens/mirror

Lens/mirror shaft

Shaft hold bracket

shaft.

7.7.15 Mirror unit and mirrors 4 and 5

(1) Remove the lens unit.
(2) Remove the mirror unit from the lens/mirror

shaft.
(3) Remove the plate springs (2 each) to take out

the mirrors.

Lens unit

Mirror 5

Note: Adjustments are necessary when installing

the mirror unit.

Mirror 4

Mirror unit

Dec. 1996 © TOSHIBA 7 - 27 2060, 2860/70 OPTICAL

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7.7.16 Lens/mirror drive unit

(1) Remove the right top cover, rear top cover,

optical cover and upper rear cover.
(2) Remove the glass stay in front and rear (4

screws).
(3) Remove the cable holder and the earth wire

(1 screw).

Glass stay (rear)

Glass stay (rear)

(4) Disconnect the connector from rear side, and

remove the 2 screws.

Lens/mirror drive unit

2060, 2860/70 OPTICAL 7 - 28 Dec. 1996 © TOSHIBA

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7.7.17 Lens/mirror switch

(1) Disconnect the connector. Remove the lens/

mirror drive unit (2 screws).
(2) Disconnect the connector. Remove the lens/

mirror switch with its bracket (2 screws).
(3) Remove the hook. Disconnect the 2 connec-

tors. Remove the lens/mirror switch.

Connector

Connector

7.7.18 Carriage 2

(1) Remove the carriage 1.
(2) Remove the lens/mirror drive unit.
(3) Set the wire holder jig to the wire drive pulley

on the front and rear side.

Lens/mirror switch

Wire drive pulley (front side)

Wire holder jig

Wire drive pulley (rear side)

Connector

Wire holder jig

Dec. 1996 © TOSHIBA 7 - 29 2060, 2860/70 OPTICAL

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(4) Remove the tension spring on the front and

rear side.

(5) Remove carriage 2.

Tension spring

Tension spring

[Rear side][Front side]

Carriage 2

7.7.19 Mirror 2 and Mirror 3

(1) Remove carriage 2.
(2) Remove the plate springs (2 each).

Mirror 3

2060, 2860/70 OPTICAL 7 - 30 Dec. 1996 © TOSHIBA

Mirror 2

Carriage 2

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7.7.20 Upper exit roller

(1) Remove the upper exit cover and rear cover.
(2) Remove the upper exit roller unit (2 screws).
(3) Remove the upper exit roller from its fitting in

the bracket.

7.7.21 Exit side ozone filter

(1) Remove the upper exit cover.
(2) Pull the ozone filter out.
Note: When replacing it with a new filter, be care-

ful not to crush or otherwise damage it with
your fingers.

7.7.22 Exit fan motor

(1) Remove the upper exit cover and rear cover.

Ozone filter

Upper exit roller unit

Fan unit

(2) Remove the 2 screws each which secure the

clamshell release lever and the upper exit

roller unit.

(3) Take out the 1 screw securing the fan unit.
(4) Remove the connector.
(5) Remove the exit fan motor.

Upper unit release lever

Connector

Exit fan motor

Fan unit

Dec. 1996 © TOSHIBA 7 - 31 2060, 2860/70 OPTICAL

Screw

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7.7.23 Carriage drive wire

(1) Remove the carriages 1 and 2.
(2) Remove the scanning motor and the belt.
(3) Remove the belt drive pulley (1 screw).
(4) Remove the fan unit.

(5) Remove the one screw on the rear side wire

drive pulley.

Belt drive pulley

(6) Remove the stopper ring and bearing in front

and rear side.
(7) Remove the whole wire drive shaft.
(8) Remove the rear side wire drive pulley from

the shaft. Remove the front side wire drive

pulley (1 screw).

Bearing

Stop-ring

[Front side]

Bearing

Stop-ring

[Rear side]

2060, 2860/70 OPTICAL 7 - 32 Dec. 1996 © TOSHIBA

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Note: How to wind the carriage drive wires

1. Fit the end “D” of the carriage drive wire
in the groove of the wire drive pulley and
wind the carriage drive wire in the direc­tion and the number of turns shown in the
figure on the right. (Do not allow the wire
to twist while winding it.)

[Front side]

2. Install the wire holding jig from the side
indicated with an arrow.

Wire holding jig

[Rear side]

End “D”

1

1 turns

2

5 turns

5 turns

End “D”

1

1 turns

2

Wire holding jig

7.7.24 Slit glass, mirror 6 cover

[Front side]

(1) Remove the process unit.

Mirror 6 cover hook

[Rear side]

Dec. 1996 © TOSHIBA 7 - 33 2060, 2860/70 OPTICAL

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(3) Remove the mirror 6 cover (1 hook).
(4) Remove the slit glass from the mirror 6 cover

releasing the claw.

Note: Be sure not to let the slit glass fall during

installation or removal.

Cover hook

Slit glass

Cover hook

Glass hook

Mirror 6 cover

7.7.25 Mirror 6

(1) Remove the optical cover and the mirror 6

cover.

(2) Remove the mirror 6 bracket (3 screws, 2

hooks).

(3) Take out the mirror 6 bracket in the direction

of the arrow.

(4) Remove the 2 plate springs and take out mir-

ror 6.

Mirror 6 bracket installation screw

Mirror 6 bracket hooks

Plate spring

Mirror 6

Installation hole

Plate spring

2060, 2860/70 OPTICAL 7 - 34 Dec. 1996 © TOSHIBA

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7.7.26 Upper damp heater-1

(1) Remove the optical co ver and the inner cov er.
(2) Remove the connector.
(3) Remove the screw and take out the upper

damp heater-1.

7.7.27 Upper damp heater-2

(1) Remove the original glass.
(2) Remove the upper exit cover.
(3) Remove the connector.
(4) Remove the screw and take out the upper

Connector

Upper damp heater-1

damp heater-2

Connector

Upper damp heater-2

Dec. 1996 © TOSHIBA 7 - 35 2060, 2860/70 OPTICAL

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8 PAPER FEEDING SECTION

8.1 Functions

This unit sends paper which is set in the paper cassette or the bypass tray to the transfer position.
The paper feeding section is mainly comprised of manual feed roller, pick-up rollers, paper feed rollers,
separation rollers, transport rollers, aligning roller, manual feed switch, paper empty switch, paper size
switch, paper feed switch, paper stop switch and also their drive mechanism.
The following explains each part function.
(1) Pick-up roller/manual feed roller

Sends paper in the bypass tray or the paper cassette to the paper feed roller and the roller moves up
and down on each occasion of paper feeding.

(2) Paper feed roller

This is the opposite of the separation roller, sending paper f ed from the pic k-up roller to the transport
roller.

(3) Separation roller

This is the opposite of the paper feed roller . When two sheets or more are f ed from the pic k-up roller,
the load of the torque limiter of the separation roller is greater than the friction power between the
sheets of paper, the separation roller stops, causing the lower sheet also to stop and not be fed at
that moment. But in the case of single sheet feeding, it rotates at the same timing as the paper feed
roller so that it has the rotation force of that roller.

(4) Transpor t roller

Transport the paper from the feed roller to the aligning roller.

(5) Aligning roller

Paper fed from the paper feed roller is stuck against the aligning roller which is at rest, and leading
edge alignment is performed.
Then the aligning roller rotates to feed paper to the developing position.
Further, the aligning roller is contacted with the brush to prevent paper dust from adhering to the
aligning roller due to paper alignment. The following explains about switches which detect paper
size, paper presence and paper feeding position for ON/OFF control of each roller.

(6) Manual feed switch

Detects if paper is set in the bypass tray. If this is the case, manual paper feeding has priority over
cassette paper feeding.

(7) Paper-empty switch

This sensor detects paper in the paper cassette by the use of the actuator . When there is no paper in
the cassette, the actuator intercepts the transmitted light in the sensor, causing a paper-empty situ­ation to be detected.

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(8) Paper size switch

Consists of four push-type switches.
In the paper cassette, tabs are installed so that any of these switches (1 to 4) is pressed when a
paper cassette is installed in the copier.
Corresponding to which switch is being pressed, paper size detection is performed.

(9) Paper stop switch

Detects the leading/trailing edge of paper passing through the paper transport roller.
Jam detection such as for paper misfeeding, etc. is also used.

(10)Paper aligning switch

Detects that the leading edge of the paper has arrived at the aligning roller.
Also detects that the trailing edge of the paper has passed through the aligning roller.
If the former is detected, it reads that the aligning roller has completed paper alignment.

Lower aligning roller

Aligning switch

Cassette tray
lift-up unit

Manual feed roller

Upper aligning
roller

Pick-up
roller

Separation pad

Manual switch

Manual pick-up roller

Manual switch actuator

Paper stop switch-1

Feed roller

Transport roller-1

Separation roller

Paper stop switch-2

Transport roller-2

Paper feeding section sectional view (Front side)

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Manual feed clutch

Main motor

Aligning roller clutch

Feed clutch (upper)

Cassette tray-up/down unit

Feed clutch (lower)

Transport
clutch

Paper feeding section drive system (Rear side)

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8.1.1 Manual pick-up roller vertical movement

Spring clutch

Drive power

Pick-up lever

Pick-up roller

Lever spring

Feed roller

Pick-up arm

When drive power is transmitted to the feed roller, rotation power is sent to the pick-up lever via the
spring clutch. Then the pick-up arm falls by its own weight and the spring clutch stops in the position in
which it has bumped into the stopper.
When the drive power of the feed roller is lost, the pick-up lever is lifted up by the force of the lever spring
after which the pick-up arm is also raised.

8.1.2 Cassette pick-up roller vertical movement

Lever a

Spring

Pick-up roller

Cassette insertion direction

Lever d

Lever b

Lever c

When the cassette is inserted, the cassette lever d pushes up the lever a in the direction A. Then the
pick-up roller is caused to fall by its own weight due to the link mechanism of the levers b and c.

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8.1.3 Paper separation operation

Since no paper separation claws are used in the
cassette, a paper separation roller is installed in­side the machine. The separation roller section
consists of a paper feed roller, separation roller,
spring joint, etc., as shown.
The feed roller is rotated by the feed clutch in the
direction of the arrow ( ) at the same timing
as the pick-up roller.
As shown in the lower right figure, two sheets feed­ing are occured, since the friction between the
sheets is smaller, the low er sheet is stopped being
fed any further while the upper sheet is forced to
be transported by the feed roller in the direction of
the arrow ( ).

[Example]
When only one sheet of paper 1 has entered into
the separation roller section, since the feed roller’ s
transporting force is stronger than the separation

Feed roller

Spring joint

Separation roller

Feed roller

roller’s braking f orce, the separation roller is f orced
to rotate causing the sheet to be sent toward the
aligning roller ( ).
When, two sheets (1 and 2) have entered into
the separation roller section at the same time, since
the powers of the feed roller’s transporting and
separation roller’s braking are g reater than the fric­tion power of the paper , the paper 1 is transported
toward in the direction of the arrow ( ) and
the paper 2 is not transported any further by the
separation roller.

1

2

Separation roller

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8.2 Cassette Feeding Operations

8.2.1 Operation explanation
[A] From power-on until standby status

(1) When the power is turned on for the copier, the tray motors (M13/14) are set to ON and the trays at

each level start to rise. When the trays are raised, the tray-up switches (S28/29) are turned on (L →
H), and the tray motors (M13/14) are turned off, which stops the upward motion of the trays. At this
point, if the empty switches (S3/14) are off (L), it is determined that paper is not present. If the empty
switches are on (H), it is determined that paper is present. The trays stop in their raised position
regardless of whether there is paper or not.

(2) If the power is turned on when the cassette has been removed, the tray motor for that level does not

come on. When the cassette is inserted in the slot, the tray is raised and the presence or absence of
paper is determined.

(3) If either of the paper stop switches (S7/16) or the aligning switch (S8) is ON (because there is paper

in the paper path) when the power is turned on, it is determined that a paper jam has occurred and
operation is not possible until the paper is removed.

[B] Standby mode

(1) After the paper supply is checked by the raising of the trays as described above, the standby mode

is obtained. In the standby mode, the trays remain in their raised position.

(2) When the cassette is inserted or removed in the standby mode, the tray is raised again to check the

paper supply.

[C] Manual feeding

• The manual feed switch detects the presence of manual feeding paper.

• The manual solenoid is turned on, and the pick-up roller and the manual feed roller are rotated.

• The pick-up roller is lowered, and paper feeding is started.

• The leading edge of the paper turns on the paper aligning switch and is aligned at the aligning
roller.

• The manual f eed clutch is turned off, and the pic k-up roller and man ual f eed roller stopped rotat­ing, and then the pick-up roller is raised.

• The aligning clutch is turned on, and the paper is transported to the transfer process.

[D] Cassette feeding (upper or lower)

• The feed clutch and the transport clutch are turned on, and the feed roller and the transport roller
are rotated, and then paper feeding is started.

• The leading edge of the paper turns on the paper stop switch, then the feed clutch is turned off.

• The leading edge of the paper turns on the aligning switch, and is aligned at the aligning roller.

• The transport clutch is turned off, and the transport roller is stopped.

• The aligning clutch is turned on, and the paper is transported to the transfer process.

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8.3 Motor Drive Circuit

8.3.1 Brush motor drive circuit

T ray-up motor (T -UP-MO T) : Driven by IC13 (upper cassette)/IC12 (lower cassette) (PW A-LGC:

T A8428)

The block diagram of TA8428 is shown below.

Protection for
overheating and
over current

Control logic

1 2 3 4 5 6 7

IN1 IN2 M(+) GND M(–) N.C. V

CC

IN1 and IN2 are input terminals for the signals from the microcomputer. In the control section, the motor
is controlled on and off based on the signals from the microcomputer. For the control, refer to the table
below.

Input Output

IN1 IN2 M (+) M (–) Description

H H L L BRAKE
L H L H CCW (upward)
H L H L CW (downward)
LL

OFF (high impedance)

STOP

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