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