Toshiba e-STUDIO 550 User manual

SERVICE MANUAL
e-STUDIO550/650/810
DIGITAL PLAIN PAPER COPIER
FileNo.31100202
(DP-5510/6510/8110)
2002-06

1. SPECIFICATIONS / ACCESSORIES /
OPTIONS / SUPPLIES
1.1. Specifications
1.2. Accessories
1.3. Options
1.4. Supplies
1.5. System List
TABLE OF CONTENTS
2. OUTLINE OFTHE MACHINE
2.1. Sectional View
2.2. Electric Parts Layout
2.3. Symbols and Functions of Various Components
2.4. Symbols and Functions of RADF Various
Components
2.5. System Block Layout
2.6. Disassembly and Replacement of Covers and PC
Boards
2.6.1. Covers
2.6.2. PC boards
3. COPY PROCESS
3.1. General Description
3.2. Details of Copy Process
3.3. Comparison of Copy Process to 6570/5570

4. GENERAL OPERATION
4.1. Overview of Operation
4.2. Operation
4.2.1. Warming-up
4.2.2. Standby state (ready for copying)
4.2.3. Cassette feed copying with [START] key ON
4.2.4. Bypass copying
4.2.5. Interrupt copying
4.3. Abnormality Detection
4.3.1. Abnormality classification
4.3.2. Abnormality description
4.4. Flow Chart
4.4.1. Power ON to ready
4.4.2. Automatic feed copying
5. CONTROL PANEL
5.1. Control Panel and Display Panel
5.2. Items Shown on Display Panel
5.2.1. Display during normal copying
5.2.2. Display in abnormal condition
5.3. Relation between Copier State and Operator's Action
5.4. Operation
5. 4. 1. Dot matrix LCD circuit
5.4.2. LED display circuit
5.5. Disassembly and Replacement

6. SCANNING SECTION
6.1. Function
6.2. Construction
6.3. Operation
6.3.1. Scanner motor
6.3.2. Two-phase motor drive circuit (fixed-current
type)
6.4. Control for Exposure Lamp
6.4.1. General description
6.4.2. Exposure lamp
6.4.3. Control circuit for exposure lamp
6.5. CCD control
6.5.1. Opto-electronic conversion
6.5.2. Shading correction
6.6. Automatic Original Size Detection Circuit
6.6.1. Principle of original size detection
6.6.2. Process of original size detection
6.7. Disassembly and Replacement
7. IMAGE PROCESSING
7.1. General Description
7.2. Image Processing Circuit
7.2.1. General description
7.2.2. Configuration
7.3. SLG Board (PWA-F-SLG-340)
7.3.1. Features
7.3.2. Functions of image processing circuit
7.4. PLG Board (PWA-F-PLG-340)
7.4.1. Features
7.4.2. Functions of image processing circuit
7.5. Scanning Section
7.6. Writing Section

8. LASER OPTICAL UNIT
8.1. General Description
8.2. Structure
8.3. Laser Diode
8.4. Disassembly and Replacement
9. PAPER FEEDING SYSTEM
9.1. General Description
9.2. Functions
9.3. Operation
9.3.1. Operation of bypass pickup roller
9.3.2. Operation of cassette pickup roller
9.3.3. Paper separation
9.3.4. General operation
9.4. Drive Circuit forTray-up Motor
9.5. Disassembly and Replacement
10. PROCESS RELATED SECTION
10. 1. Construction
10. 2. Functions
10. 3. Charger Wire Cleaner Operational Circuit
10. 4. High-voltageTransformer Output Control Circuit
10. 4. 1. General description
10. 4. 2. Operation
10. 5. Surface Potential Sensor
10. 5. 1. General description
10. 5. 2. Construction
10. 5. 3. Control method
10. 6. Disassembly and Replacement

11. DRUM/CLEANER UNIT
11. 1. Construction
11. 2. Functions
11. 3. DrumTemperature Detection Circuit
11. 4. Image Quality Control
11. 4. 1. General description
11. 4. 2. Principle of sensor
11. 4. 3. Outline of control
11. 4. 4. Construction
11. 5. Disassembly and Replacement
12. DEVELOPER UNIT
12. 1. Construction
12. 2. Functions
12. 3. Developer Unit Drive
12. 4. Motor Drive Circuit
12. 4. 1. Tonermotor
12. 4. 2. Developer motor
12. 5. Auto-toner Sensor Circuit
12. 5. 1. General description
12. 5. 2. Operation of auto-toner sensor
12. 6. Disassembly and Replacement
13. TRANSFER/TRANSPORT UNIT
13. 1. General Description
13. 2. Operation
13. 3. Functions
13. 4. Disassembly and Replacement

14. FUSER UNIT
14. 1. General Description
14. 2. Operation
14. 3. Functions
14. 4. Heater Control Circuit
14. 4. 1. Configuration
14. 4. 2. Heating principle of IH coil
14. 4. 3. IH control circuit interface
14. 4. 4. IH control circuit abnormalities
14. 4. 5. Temperature detecting section
14. 4. 6. Detection of open-circuited thermistors
14. 5. Fuser Motor Drive
14. 5. 1. Outline of operation
14. 5. 2. Control signals
14. 6. Disassembly and Replacement
15. EXIT/REVERSE SECTION
15. 1. General Description
15. 2. Operation
15. 3. Disassembly and Replacement

16. REVERSING AUTOMATIC DOCUMENT
FEEDER (RADF)
16. 1. General Description
16. 2. Construction
16. 3. Drive System
16. 4. Signal Block Diagram
16. 5. Operations
16. 5. 1. A4 single-sided feeding
(Operational condition: A4 paper/Rreproduction ratio: 100%)
16. 5. 2. A4 double-sided feeding
(Operational condition: A4 paper/Reproduction ratio: 100%)
16. 5. 3. A3 single-sided feeding
(Operational condition: A3 paper/Reproduction ratio: 100%)
16. 5. 4. A3 double-sided feeding
(Operational condition: A3 paper/Reproduction ratio: 100%)
16. 5. 5. Single-sided feeding at mixed-original mode
(Operational condition: A4-R and FOLIO papers/Reproduction ratio: 100%)
16. 6. Jams
16. 6. 1. Jams at feeding section
16. 6. 2. Jams at transporting section
16. 6. 3. Jams at large original exit section
16. 6. 4. Jams at small original reverse section
16. 6. 5. Jams at small original exit section
16. 6. 6. Jams at intermediate transport section
16. 7. Erros
16. 8. Original Size Detection
16. 8. 1. Original size detection method
16. 8. 2. Original size detection chart
16. 9. Flow Chart
16.10. Timing Chart
16.11. Circuits
16.12. Input/Output Signals
16.13. Disassembly and Replacement

17. POWER SUPPLY UNIT
17. 1. Construction
17. 2. Operation of DC Output Circuits
17. 3. Output Channel
17. 4. Fuse
17. 5. Configuration of Power Supply Unit
17. 6. Power Supply Sequence
18. PC BOARDS

SERVICE HANDBOOK
File No.31110201
e-STUDIO550/650/810
DIGITAL PLAIN PAPER COPIER
(DP-5510/6510/8110)
2002-06