Toshiba SD-2550A - Table of Contents

SECTION 2
PART REPLACEMENT AND ADJUSTMENT PROCEDURES
SECTION 3
SERVICING DIAGRAMS
1. STANDING PC BOARDS FOR SERVICING ......................... 3-1
2. CIRCUIT SYMBOLS AND
SUPPLEMENTARY EXPLANATION ..................................... 3-2
2-1. Precautions for Part Replacement ..................................... 3-2
2-2. Solid Resistor Indication ..................................................... 3-2
2-3. Capacitance Indication ....................................................... 3-2
2-4. Inductor Indication ............................................................. 3-3
2-5. Waveform and Voltage Measurement .............................. 3-3
2-6. Others ................................................................................... 3-3
3. PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM .......................................................... 3-4
4. BLOCK DIAGRAMS .................................................................. 3-5
4-1. Overall Block Diagram ....................................................... 3-5
4-2. Power Supply Block Diagram ............................................ 3-7
4-3. Front Display, Power Switch Block Diagram ................... 3-8
4-4. Main Block Diagrams ....................................................... 3-11
5. CIRCUIT DIAGRAMS ............................................................. 3-15
5-1. Power Supply Circuit Diagram ........................................ 3-15
5-2. Front Display, Power Switch Circuit Diagram .............. 3-18
5-3. Main Circuit Diagram ...................................................... 3-21
5-4. Motor System Circuit Diagrams ...................................... 3-33
6. PC BOARDS .............................................................................. 3-35
6-1. Power Supply PC Board ................................................... 3-35
6-2. Power Switch PC Board ................................................... 3-36
6-3. Front Display PC Board ................................................... 3-37
6-4. Main PC Board .................................................................. 3-39
CONTENTS
SECTION 1
GENERAL DESCRIPTIONS
1. OPERATING INSTRUCTIONS ................................................ 1-1
2. LOCATION OF MAIN PARTS AND
MECHANISM PARTS ............................................................. 1-30
2-1. Location of Main Parts ..................................................... 1-30
2-2. Location of Mechanism Parts .......................................... 1-31
2-2-1. Type A ............................................................................ 1-31
2-2-2. Type B ............................................................................ 1-34
1. REPLACEMENT OF MECHANICAL PARTS (TYPE A) .... 2-1
1-1. Cabinet Replacement .......................................................... 2-1
1-1-1. Top Cover ........................................................................ 2-1
1-1-2. Tray Panel ....................................................................... 2-1
1-1-3. Front Panel ...................................................................... 2-2
1-1-4. Tray .................................................................................. 2-2
1-1-5. Rear Panel ........................................................................ 2-2
1-2. PC Board Replacement ....................................................... 2-3
1-2-1. Main PC Board ............................................................... 2-3
1-2-2. Power PC board .............................................................. 2-3
1-2-3. Front PC Board ............................................................... 2-4
1-3. Mechanism Parts ................................................................. 2-4
1-3-1. Mechanism Chassis Assembly ........................................ 2-4
2. REPLACEMENT OF MECHANICAL PARTS (TYPE B) .... 2-5
2-1. Cabinet Replacement .......................................................... 2-5
2-1-1. Top Cover ........................................................................ 2-5
2-1-2. Clamper Stay ................................................................... 2-5
2-1-3. Tray Panel ....................................................................... 2-6
2-1-4. Front Panel and Tray ..................................................... 2-6
2-1-5. Rear Panel ........................................................................ 2-7
2-2. PC Board Replacement ....................................................... 2-7
2-2-1. Main PC Board ............................................................... 2-7
2-2-2. Power PC board .............................................................. 2-8
2-2-3. Front PC Board ............................................................... 2-8
2-3. Mechanism Parts ................................................................. 2-8
2-3-1. Mechanism Chassis Assembly ........................................ 2-8
3. TROUBLESHOOTING ............................................................ 1-37
3-1. Main Circuit ....................................................................... 1-37
3-1-1. Servo System .................................................................. 1-37
3-1-2. Location Diagram of Servo Test Point ........................ 1-44
SECTION 4
PARTS LIST
SAFETY PRECAUTION ................................................................. 4-1
NOTICE ............................................................................................. 4-1
ABBREVIATIONS ........................................................................... 4-1
1. Integrated Circuit (IC) ............................................................ 4-1
2. Capacitor (Cap) ....................................................................... 4-1
3. Resistor (Res) ........................................................................... 4-1
4. EXPLODED VIEWS ................................................................... 4-2
4-1. Packing Assembly ................................................................ 4-2
4-2. Chassis Assembly (Type A) ................................................ 4-3
4-3. Mechanism Assembly (Type A) ......................................... 4-4
4-4. Chassis Assembly (Type B) ................................................ 4-5
4-5. Mechanism Assembly (Type B) ......................................... 4-6
5. PARTS LIST ................................................................................ 4-7
Specifications