STUDIO350/450 e-STUDIO352/452 e-STUDIO353/453
Trademarks
Transportation / Installation
Service of Machines
Main Service Parts for Safety
Contents
Scanner
11-1
12.4
12-4
12-5
12-7
Specifications
System copy speed Copy mode Sec
Approx seconds temperature 20C
Set 55.47 54.68 Sets 126.21 118.07
Sets 196.93 181.36
Automatic duplexing unit Stackless, Switchback type
LCF-Option Stack height 137.5 mm x 2 equivalent to
Sheets 64 to 80 g/m2 17 to 22 lb
80 g/m2 17 to 22 lb
Specifications
Accessories
Options
STUDIO350/450
STUDIO352/353/452/453
2nd line for fax board
07/11
Supplies
System List
Radf
STAPLE-2000
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Outline of the Machine
Sectional View
04/05
0 22 24 25 2 27 2
2003 2008 Toshiba TEC Corporation All rights reserved
Electric Parts Layout
Unit construction
LT series
Scanner unit Motor, sensor, lamp
A4 series
Control panel unit
PC board, heater, thermostat, other part
ASD/AUD/CND/SAD/TWD models Standard NAD/MJD models Option
Process unit Motor, sensor, switch, PC board
Motor, sensor, lamp, heater, thermistor, thermostat
Laser unit
Paper feeder unit
Transport unit
Bypass unit
Automatic duplexing unit
Fuser unit
Drive unit
CLT5 CLT6 CLT7 CLT8 HVT
PC board unit
STUDIO350/450
STUDIO352/353/452/453
Symbols and Functions of Various Components
Sensors and switches
CST-U-SW
CST-L-SW
SFB-SNR
SFB-FED-SNR
Electromagnetic clutches
Solenoids
PC boards
Lamps and heaters
Thermistors and thermostats
Transformer
Others
System block diagram
General Description
2003 2008 Toshiba TEC
Construction of boards Construction diagram of boards
Function of each board
Outline of the Machine
HVT
Installation and Replacement Covers and PC boards
External covers Front cover
Front left cover
Open the front cover Remove 1 screw and front left cover
Rear cover STUDIO350/450
Remove 7 screws and take off the rear cover
Left upper cover
Front upper cover
Right upper cover
Upper rear cover
Receiving tray
Remove 2 screws and take off the receiving tray
Tray back cover
Left cover
Left rear cover
IH terminal cover
Right front hinge cover
STUDIO350/352/353/450/452/453
Front right cover
Right lower cover
Right rear cover
LGC board unit
PC boards
Logic PC board LGC board A-1 LGC board
Hard disk / HDD cooling fan
Remove 4 screws and take off the hard disk
SYS board cover
System control PC board case SYS board case STUDIO350/450
Hard disk
HDD cooling fan
05/11
07/11
NIC board
NIC board / System control PC board SYS board STUDIO350/450
Remove 10 screws, take off the SYS board
Switching power supply
SYS board
Noise filter
Power supply cooling fan
High-voltage transformer
MR-3015 Reversing Automatic Document Feeder Radf
Turn OFF the power and unplug the power Cable
KD-1011 Paper Feed Pedestal PFP
KD-1012 Large Capacity Feeder LCF
44 2003 2008 Toshiba TEC Corporation All rights reserved
MJ-1022 Hanging finisher D-1 When PFP/LCF is not installed
Lift up the equipment and take off the LCF
When PFP/LCF is installed
Remove 2 screws Lift up the finisher and take it off
MJ-1023 Console finisher
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MJ-1024 Console finisher
MJ-6004 Hole punch unit
Outline of the Machine
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Lift up the punch unit and take it off
KN-3520 Bridge unit
MJ-5004 Job separator
Outline of the Machine
MJ-5005 Offset tray
MR-3018 Reversing Automatic Document Feeder Radf
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MJ-1101 Console finisher
MJ-6101Hole punch unit
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Remove 2 screws Take off the hole punch unit
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Copy Process
General Description of Copying Process
Details of Copying Process
Example
Image processing sec Tion Example CCD light Value of image
Magnet Magnetic roller Toner
30-100 µm
Additional Explanation
Charger
Paper may not be separated from the drum surface
Because of moisture or malfunction of the transfer
Separation charger during printing. As the result
Used to forcibly separate the paper which was left
Recovery blade Cleaning blade Drum rotation
Comparison with DP4500/3500
Overview of Operation
Description of Operation
Copying operation Bypass feed copying Interrupt copying
Warming-up
Ready state ready for copying
Drawer feed copying Upper drawer paper feeding
General Operation
Page
Press the Interrupt button
Bypass feed copying
Interruption copying
Detection of Abnormality
Types of abnormality
Description of abnormality
General Operation
Paper jam E010 → The copying operation is stopped. Timer
Paper jam E010
Paper jam E020
General Operation
Flow Chart
Immediately after the power is turned on
YES
Automatic paper feed copying
Paper jam E00
Ready
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Control Panel
Control Panel and Display Panel
Items Shown on the Display Panel
Display
Saddle Stitch
Tray Full Ready
Change Drawer To Correct Paper Size
Copying
This Size Paper
Check Paper
Large Capacity Feeder Cannot Punch
To Correct Media Type Press Basic
Department
Counter
According to the messages displayed
Radf
Dot matrix LCD circuit
Structure
System control PC board Control panel
Method of LED display ex Displaying Copy
Data Transmission
LED display circuit
Disassembly and Replacement
DSP board
Hinge bracket
Remove 16 screws and take off the KEY board
KEY board
Scanner
Function
Construction
Mirror-2 Mirror-3
Scan motor
Scanning drive circuit
Motclk
Motdir
Moten
Motref
Initialization at power-ON
Control of Exposure Lamp
General description
Exposure lamp
Working conditions
Control circuit for the exposure lamp
SLG board
Shading correction
General Description of CCD Control
Opto-electronic conversion
Automatic Original Size Detection Circuit
Principle of original size detection
Process of detection of original size
A4 Series LT Series
Stlt
When the platen sensor is OFF
APS-C APS-R
LED
Original glass
Lens cover
Automatic original detection sensor APS sensor A4 series
Protrusion
LT series
704L
Lens unit
Rear side
Carriage-1
Remove 2 seals and release the cable
After the installation, move carriage-1
With the position as shown in the figure
Fix it with a seal
Align the bent portion of the lamp
Carriage wire / Carriage-2
Rear sides Remove the carriage wires on both front
Mirror-1
INV board
Mirrors-2
Platen sensor / Carriage home position sensor
SLG board
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Image Processing
Followings are the boards used for image processing
Signal amplifi
Configuration
Features
SLG Board
Functions of image processing circuit
After correction
Example Enlargement
Example Reduction
2003 2008 Toshiba TEC Corporation All rights reserved
LGC Board
ON/OFF control of the semiconductive laser
APC Auto Power Control
Laser Driving PC Board LDR board
Laser Optical Unit
Drve PC board
Structure
Laser beam Drum
Devaton
Laser Optical Unit
Light emission is started when the forward cur
Laser Diode
Rent reaches or becomes larger than the threshold
Current and outputs the monitor current which is
Drive circuit of the polygonal motor
Laser Optical Unit Cooling Fan
Polygonal Motor
Laser optical unit
Laser unit fan
LRL PC board
Functions
20,2
Feeding system
Paper Feeding System
Paper Feeding System
Operation of drawer pickup roller
Operation
Operation of bypass pickup roller
Separation of paper
Feed roller
Bypass feeding
General operation From power-ON to ready status
Ready status
Paper feeding
Drive Circuit of Tray-up Motor
IN1 IN2
Screw
Bypass unit A-1 Bypass unit
Remove 2 screws and take off the right rear hinge cover
Hinge assembly
Open the side cover
Pull out the hinge assembly from the bypass tray
Hinge assembly
SFB board
Plate Bracket Spring
Solenoid arm
Bypass pickup solenoid
Solenoid
Bypass paper sensor
Bypass pickup roller
Bypass feed roller
Bypass transport roller
Drive unit
Bypass feed clutch
Bypass separation roller
Bypass feed sensor
Sensor plate
Lower drawer feed sensor
Disconnect 3 connectors
Disconnect the connector on the front side
Jam access cover
Lead wire
Connector
Terminal
Cover
Upper drawer
Feed sensor
Registration roller
Setscrew
Drive gear unit Screw Ring Bushing Registration Roller
Tray drive unit/Tray-up motor
Paper Feeding System
Transport clutch upper/lower
Upper transport clutch
Lower transport
Clutch
Drawer detection switch upper/lower
Attach the clutches to the shafts as shown on the right
Drawer feeding unit upper/lower H-1 Drawer feeding unit
Tray-up sensor
Paper stock sensor
Separation roller
Drawer feed clutch
Feed roller
Pickup roller
0.5mm
Drive System
Main Motor
10.3.1Main motor drive
10.3.2Control signals
Signal names are for the connector CN318 LGC board
Gear unit
Main motor
Registration clutch
Developer drive clutch
Drive System
Drum Related Section
11 2003 2008 Toshiba TEC Corporation All rights reserved
Detection standard line
Drum Related Section
Description of operations
Output Control Circuits of High-Voltage Transformer
Overview
CN30-B7 Hvdvr
Drum Temperature Detection Circuit
Drum temperature detection circuit
11.5.2Construction
Temperature/Humidity Sensor
11.5.1General description
Main charger grid
Cleaner unit
Main charger B-1 Main charger
Main charger wire
Charger wire cleaning pad
Drum
Seal
Cleaner Cleaning blade
Cleaning blade
Recovery blade
Separation finger
Charger wire
Exhaust fan / Sub-separation fan
Discharge LED
Toner bag full detection sensor-2
Developer unit cooling fan I-1 Developer unit cooling fan-2
Developer unit cooling fan-1
Developer unit cooling fan unit-1
Middle fan
Temperature / Humidity sensor
11 20 2003 2008 Toshiba TEC Corporation All rights reserved
Development System
Sectional view of developer unit
Functions
Drive Circuit of Toner Motor
Auto-Toner Circuit
STUDIO352/353/452/453 STUDIO350/450
Function of auto-toner sensor
Drve ndng
Adjustment using the temperature / humidity sensor
Adjustment using the drum thermistor
Developer unit
Developer material Discharge of developer material
Guide roller Front side
Guide roller
Rear side
Remove 1 E-ring and 4 gears Take off the guide roller
Auto-toner sensor
Drum thermistor
Replacement of Oil Seal
Developer sleeve
Replace the oil seal on the shaft on the de
Veloper sleeve rear side, if necessary
Mixer-1
Mixer-2
Oil seal
Bushing
Toner cartridge drive unit I-1 Toner cartridge drive unit
Toner cartridge detection switch
Toner motor
Rice grains on entire surface of the oil seal Evenly
Wipe off the excessive grease
12 16 2003 2008 Toshiba TEC Corporation All rights reserved
Fuser Unit / Paper Exit Section
13 2003 2008 Toshiba TEC Corporation All rights reserved
Fuser Unit / Paper Exit Section
Configuration
13.4
Circuit
13.4.1
Image of current flowng from a to B
13.4.2Heating principle of IH Heater
IH control circuit interface
IH2 on
VDD
IH1 on
FAX
13.4.5Temperature detection section
Control of the surface temperature of the fuser belt
Energy Saver
Reference
CPU
Checking timing Condition Temperature judged Error
13.4.6Abnormality in the IH control circuit
H1ERR1 CPU PA2 H1ERR2 PA3
IH error
Control Circuit of Exit Motor
Exit Motor Drive
Fuser unit cooling fan
Harness clamp
Exit sensor
Exit finger
Cleaning roller
Separation finger for pressure roller
Separation finger for fuser roller
Stepped screw
Fuser Unit / Paper Exit Section
Pressure roller
IH coil
Fuser roller
Thermistor
Take off the IH terminal cover Chapters 2.5.1 L
Thermostat
IH control PC board IH board
IH board unit
IH board cooling fan
Metal bushing
Exit motor
Exit roller
Take off the lower exit roller
Automatic Duplexing Unit ADU
Description of Operations
2003 2008 Toshiba TEC Corporation All rights reserved
Automatic Duplexing Unit
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Timing chart for duplex copying from upper
PmentEqu
Equpment
Drive of ADU
Yes
Yes
Right front hinge cover
Screw Right rear hinge cover
ADU inside rear cover
Snap pin
Tape
ADU inside
ADU opening / closing switch
Paper guide
ADU cover
Rear latch
Remove the screw and release the rear latch
Opening /Closing lever
ADU entrance sensor, ADU exit sensor
Rear latch
ADU driving PC board ADU board
ADU motor
ADU gear unit
Motor
ADU clutch
ADU clutch
Upper transport roller
Remove the clip on the front side
Remove 2 bushings and take off the upper
Pin
Belt
Middle transport roller
Lower transport roller
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Power Supply Unit
Operation of DC Output Circuits
Output Channel
Power Supply Unit
Fuse
LGC
PFP/LCF
SLG
Configuration of Power Supply Unit
STUDIO350/352/353/450/452/453 Power Supply Unit
PWR-EN
Sequence of Power Supply
PWR-DN
AC Wire Harness
2003 2008 Toshiba TEC Corporation All
Power Supply Unit
PC Boards
PWA-F-SYS e-STUDIO350/450
STUDIO352/353/452/453
PWA-F-LGC e-STUDIO350/450 STUDIO352/353/452/453
PWA-F-SLG e-STUDIO350/450 STUDIO352/353/452/453
PWA-F-CCD
PWA-F-ADU
PWA-F-DSP e-STUDIO350/450 STUDIO352/353/452/453
2003 2008 Toshiba TEC Corporation All rights reserved
PWA-F-FUS ASD/AUD/CND models Standard, MJD model Option
