Toshiba 4550, Service Manual

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[4550 SERVICE MANUAL] 2510001 1
GENERAL PRECAUTIONS REGARDING THE INSTALLATION AND 2510001 1
THE SERVICE OF THE COPIERS..................................................0-1 2510001 1
1. SPECIFICATIONS, ACCESSORIES, OPTIONS....................................1-1 4550101 2
1.1 Specifications........................................................1-1 4550101 0
1.2 Accessories...........................................................1-4 4550104 0
1.3 Options...............................................................1-4 4550104 0
1.4 System List...........................................................1-5 4550105 0
2. GENERAL DESCRIPTION OF THE 4550.........................................2-1 4550201 2
2.1 Functions of the 4550.................................................2-1 4550201 0
2.2 Front/Rear View.......................................................2-3 4550203 0
2.2.1 Front Section View.................................................2-3 4550203 0
2.2.2 Rear Side View.....................................................2-4 4550204 0
2.2.3 ADF Front Section View.............................................2-5 4550205 0
2.3 Electrical Parts Layout...............................................2-6 4550206 0
2.3.1 Copier's DC Electrical Parts.......................................2-6 4550206 0
2.3.1.1 DC Electrical Parts Except Motors...............................2-6 4550206 0
2.3.1.2 Motors..........................................................2-7 2510206 0
2.3.2 AC Electrical Parts................................................2-8 4550207 0
2.3.3 ADF Electrical Parts...............................................2-9 4550209 0
2.4 Symbols and Functions of Electrical Parts............................2-10 4550210 0
2.5 Wire-Harness Location Diagram........................................2-16 4550216 0
2.5.1 Location Diagram for Upper Unit...................................2-16 4550216 0
2.5.2 Location Diagram for Lower Unit...................................2-17 4550217 0
2.6 Removal of Covers and PC Boards......................................2-18 5010217 0
2.6.1 Removal for Covers................................................2-18 5010217 0
2.6.2 Removal of Main PC Boards.........................................2-22 4550222 0
3. COPYING PROCESS.........................................................3-1 2510301 2
3.1 Copying Process.......................................................3-1 2510301 0
3.2 Detailed Description of Copying Process...............................3-2 2510302 0
3.3 Comparison with the 4010 of Copying Process Conditions...............3-10 4550310 0
4. GENERAL COPIER OPERATION................................................4-1 4010401 2
4.1 Operation Outline.....................................................4-1 4010401 0
4.2 Descriptions of Operation.............................................4-1 4010401 0
4.2.1 Operation up to Standby State after Power On.......................4-1 4010401 0
4.2.2 Standby (Ready)....................................................4-1 4010401 0
4.2.3 Automatic Feed Copying Using the PRINT Key.........................4-2 4010402 0
4.2.4 Bypass-Feed Copying................................................4-5 2510405 0
4.2.5 Interrupt Copying..................................................4-5 2510405 0
4.3 Fault Detection.......................................................4-6 2510406 0
4.4 Flow Charts..........................................................4-13 2510413 0
4.4.1 Power On to Ready.................................................4-13 2510413 0
4.4.2 Automatic Cassette Feed Copying...................................4-15 4010415 0
5. DISPLAY UNIT............................................................5-1 4550501 2
5.1 Detailed Drawing of the Control Panel and the Display Panel...........5-1 4550501 0
5.2 Items Shown on the Display Panel......................................5-2 4550502 0
5.2.1 Display during Normal Copying......................................5-2 4550502 0
5.2.2 Displays in the Event of Faulty Conditions.........................5-3 4550503 0
5.3 Relation between Copier Conditions and Operator's Actions.............5-6 4550506 0
5.4 Description of Operation..............................................5-7 4550507 0
5.4.1 Dot Matrix LCD Display Circuit.....................................5-7 4550507 0
5.4.2 LED Display Circuit................................................5-8 4550508 0
5.5 Disassembly and Replacement..........................................5-12 5010513 0
6. DRIVE SYSTEM............................................................6-1 4550601 2
6.1 Construction of Drive System..........................................6-1 4550601 0
6.2 Description of Operations.............................................6-1 4550601 0
6.3 Main Motor (IC Motor) Drive...........................................6-2 2510602 0
6.3.1 Structure of IC Motor..............................................6-2 2510602 0
6.3.2 IC Motor Rotation System...........................................6-2 2510602 0
6.3.3 Position-Detection of Rotor........................................6-3 2510603 0
6.3.4 Main Motor Drive...................................................6-4 2510604 0