Name: Toshiba 1550
Brand: Toshiba
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1550/1560 GENERAL 2 - 13 Mar. 1998 © TOSHIBA

2.4 Removing Covers and Electrical

Parts

2.4.1 Removing covers

[A] Front cover

(1) Remove the cassette (in the direction of the

arrow).

(2) Remove the screws fastening the hinge (4 pcs.).

[B] Inner cover (upper)

(1) Open the front cover.

(2) Remove the toner cartridge.

(3) Remove three screws.

Front cover

Cassette

Hinge

Inner cover (upper)

General Preacutions2
Specifications4
Accessories7
Options and Supplies7
Table of Contents8
Outline of the Machine8
Front and Rear Sectional Views for the 156010
Electrical Parts Location Diagram12
DC Electrical Parts Excluding Motors12
Mirror12
- Electrical Parts such as Motors13
- AC Electrical Parts14
- Exposure Lamp14
- Carriage 238
Aligning Roller (Lower55
- Lower Unit Drive56
- Upper Unit Drive56
- Explanation of Functions57
- Disassembly and Replacement58
- Drum Drive Gear and Developer Drive Gear58
- Mirror58
- Mirror Unit68
- Optical System68
Mirror69
- Explanation of Operation70
- Scanning Motor70
- Mirror Motor and Lens Motor71
- Immediately after the Power on72
- Mirror72
Auto Exposure PC Board73
- Mirror Motor74
- Lens Motor75
- Home Switch, Mirror Switch and Lens Switch75
- Exposure Lamp and Thermofuse76
Original Glass76
- Carriage 177
- Carriage Drive Wire78
- Mirror 681
- Pulse Motor Drive Circuit82
- Form of Electric Wave that Flows into the Motor83
- Waveform Timing Chart of each Section84
- Equivalent Circuit of STK6712B84
- Pulse Motor Dirve Circuit85
- Exposure Control Circuit86
- Brief Description86
- Function of Lamp Regulator87
- Characteristics of the Curve of the Lamp Regulator87
- Automatic Exposure Sensor Circuit88
- Arithmetic and Control Unit88
- Lamp Regulator Circuit89
- Lower Paper Feeder Unit Turned Upside down90
- Upper Paper Feeder Unit90
- Feeder Unit90
Aligning Roller (Upper90
- Paper Feeding Operation91
- Aligning Roller (Upper91
- Paper Separation Operation92
- Manual Feeding Operation92
- Cassette Feeding Operation92
- Upper Paper Feed Unit94
- Aligning Switch94
- Clutch and Aligning Rollers95
- Aligning Roller (Upper96
- Lower Paper Feed Unit97
- Empty Switch98
- Pick-Up Roller and Feed Roller100
- Pick-Up Roller Clutch and Feed Roller Clutch100
- Drum-Related Section101
Discharge Lamp101
- Main Charger, Discharge Lamp and LED Erasing Array102
- Transfer/Separation Chargers102
- Process Unit103
- Discharge Lamp103
- Main Charger Unit103
- Main Charger104
- LED Erasing Array104
- Replacing the Cleaning Pad105
- Replacing the Charge Wire106
- Damp Heater Unit107
- Transfer/Separation Terminal108
- Main Charger Terminal109
- Transfer/Separation Electric Current Control Circuit110
- Description110
- Transfer/Separation Control Circuit Diagram110
- LED Eraser Array111
- High-Voltage Transformer (PS-HVT)113
- Front Sectional View114
- Developer Unit114
- Drive System115
- Magnetic Roller, Mixer 1 and Mixer 2115
- Toner Cartridge115
- Removal and Installation of the Developer Unit116
- Installing the Developer Material116
- Removing the Developer Material118
- Guide Rollers119
- Front Side119
- Rear Side120
- Toner Cartridge Drive Motor121
- Auto-Toner Sensor121
- Magnetic Roller122
- Brush Motor Drive123
- Auto-Toner Sensor Circuit124
- Operation of Auto-Toner Sensor125
- Functions of Auto-Toner Sensor125
- Cleaner Unit127
- View with the Drum, Main Charger Unit and Developer Unit Removed127
- View with the Drum Removed127
Recovery Blade127
Toner Recovery Auger128
Drum129
- Main Blade131
- Toner Full Switch132
- View with the Upper Heat Roller Removed133
- View with the Fuser Guard Removed133
- Fuser and Paper Exit Section133
- Fuser Unit134
- Paper Exit Section134
- Heater Lamp135
- Thermostat, Thermistor and Brush136
- Cleaning Felt Roller and Cleaning Blade137
- Upper Heat Roller137
- Lower Heat Roller137
- Lower Exit Roller and Paper Exit Switch138
- Paper Exit Switch139
- Lever Caps139
- Lower Exit Roller139
- Separation Claws139
- Heater Control Circuit141
- Temperature Detection Unit141
- Thermistor Disconnection Detection142
- Optional Paper Feeding Unit143
- General Description144
- Names of the Main Components144
- View with the Rear Cover and Cassette Removed144
- Symbols and Functions of Electrical Parts145
- Aligning Roller (Upper146
- Functions and Operation146
- Detection and Clearing of Paper Jams147
- Covers and Paper Guide149
- Jam Access Cover149
- Paper Guide149
- Transport Rollers, Paper Stop Switch151
- Transport Roller Clutch and Door Switch151
Transport Guide152
- Separation, Pick-Up and Feed Rollers153
- Lower Paper Feeding Unit154
- Drive Motor and Drive PC Board155
- Flow Chart157
- Timing Chart161
- A4 Lateral Single-Sheet Copying161
- A4 Lateral Two-Sheets Copying161
- Explanation of Circuits162
- Interface Signals162
- Signals from the Copier to the Paper Feeding Unit162
- Signals from the Paper Feeding Unit to the Copier162
- Driving of the Drive Motor163
- Current Route While the Motor Is Turned On/Off163
- Electric Circuit Diagram and PC Board Assembly164
- PFU Drive Circuit Diagram164
- Harness Location Diagram165
- Harness Connection Diagram166
- PC Board Assembly167
- Electrical Circuit Diagram168
- Logic Circuit168
- 1560 Logic Circuit176
- Power Supply Circuit184
- Control Panel Circuit185
- Fuser Circuit189
- Power Stabilizing Circuit190
- Explanation of Circuit Operation191
- Pwa-F-Fus192
- Pwa-F-Lgc192
- Pwa-F-Pnl193
- Pwa-F-Aes193
- Pwa-F-Lrg193
- AC Harness Connection Diagram194
- AC Control Circuit194
- DC Harness Connection Diagram195
- Unpacking and Set-Up Procedure for the 1550197
- Installing the Copy Receiving Tray198
- Setting the Developer Unit199
- Automatic Adjustment of the Auto-Toner Sensor201
- Adjustment Procedure201
- Final Operation Check202
- Changing the Image Settings202
- Light Distribution Adjustment202
- Exposure Adjustment202
- Adjustment of Manual Exposure203
- Automatic Adjustment of Auto Exposure204
- Manual Adjustment of Exposure205
- Changing the Paper Size of the Cassette206
- Procedure for Installing the Toner Cartridge207
- Unpacking and Set-Up Procedure for the Paper Feeding Unit MY-1004208
- Installation Procedure209

Toshiba 1550 Service Manual

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Brand	Toshiba
Model	1550
Category	Copier
Language	English