Sony UP-960, Service Manual

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1 UP-960(UC)
UP-960CE(CE)
TABLE OF CONTENTS
1. OPERATING INSTRUCTIONS
2. SERVICE OVERVIEW
2-1. PC BOARD LOCATION ............................................................................... 2-1
2-2. REMOVAL OF THE COVER AND THE PANELS .................................... 2-2
2-2-1. Removal of the Top Cover ..................................................................... 2-2
2-2-2. Removal of the Door Panel .................................................................... 2-2
2-2-3. Removal of the Front Panel .................................................................... 2-3
2-2-4. Removal of the Rear Panel ..................................................................... 2-3
2-3. REMOVAL OF THE MAIN PARTS ............................................................ 2-4
2-3-1. Removal of the Mechanical Block ......................................................... 2-4
2-3-2. Removal of the MA-91 Board and the Switching Regulator ................. 2-4
2-3-3. Removal of the Thermal Head ............................................................... 2-5
3. ELECTRICAL ALIGNMENT
3-1. TRAP ADJUSMENT ..................................................................................... 3-1
3-2. VIDEO LEVEL ADJUSTMENT ................................................................... 3-2
3-3. BRIGHTNESS AND CONTRAST ADJUSTMENT .................................... 3-2
3-4. DOOR LOCK SENSOR ADJUSTMENT ..................................................... 3-3
3-5. HEAD VOLTAGE ADJUSTMENT .............................................................. 3-4
4. CIRCUIT OPERATION DESCRIPTION
4-1. VIDEO CIRCUIT ........................................................................................... 4-4
4-1-1. Input Trap Filter Circuit ......................................................................... 4-4
4-1-2. Sharpness, AGC Circuit and C-SYNC Signal ........................................ 4-4
4-1-3. Brightness, Contrast Control and A/D Conversion ................................ 4-4
4-2. OSCILLATOR CIRCUIT .............................................................................. 4-5
4-3. IC601 PERIPHERAL CIRCUIT .................................................................... 4-5
4-3-1. Serial Data Reading from System Control ............................................. 4-6
4-3-2. Writing to the Frame Memory ................................................................ 4-6
4-3-3. Transfer from Frame Memory to Line Memory ..................................... 4-6
4-3-4. Thermal Head Control and One Line Memory ...................................... 4-6
4-4. SYSTEM CONTROL SECTION .................................................................. 4-8
4-4-1. Watch of Various Keys .......................................................................... 4-8
4-4-2. Watch of Various Function Switches ..................................................... 4-8
4-4-3. Platen Motor Control .............................................................................. 4-9
4-4-4. Head Up and Down Control ................................................................... 4-9
4-4-5. Door Open and Close Control .............................................................. 4-10
4-4-6. Watch of Paper Sensor ......................................................................... 4-11
4-4-7. Watch of the Head Temperature Sensor ............................................... 4-11
4-4-8. Head Fan Motor (for Head Cooling) Control ....................................... 4-11
4-4-9. Analog Circuit Section Control ............................................................ 4-12
4-4-10. Gate Array IC601 Control .................................................................... 4-12