Denon PMA-50, Service Manual

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ABOUT THIS MANUAL .............................................................3
What you can do with this manual ............................................3
Using Adobe Reader (Windows version) ..................................4
SAFETY PRECAUTIONS ..........................................................6
NOTE FOR SCHEMATIC DIAGRAM
.........................................7
NOTE FOR PARTS LIST ...........................................................7
INSTRUCTIONS FOR HANDLING SEMI-CONDUCTORS AND
OPTICAL UNIT ..........................................................................7
1. Ground for Human Body ......................................................7
2. Ground for Workbench .........................................................7
TECHNICAL SPECIFICATIONS ................................................9
DIMENSION .............................................................................10
PRECAUTIONS DURING SERVICE .......................................11
Initializing This Unit .................................................................11
Service Jig ..............................................................................11
DISASSEMBLY ........................................................................12
1. MAIN ASSY .........................................................................14
2. FRONT ASSY ......................................................................16
3. NFC PCB ............................................................................17
4. SIDE COVER ......................................................................18
5. BOTTOM COVER ...............................................................19
SPECIAL MODE .....................................................................20
Special mode setting button ....................................................20
1. Version Check mode ..........................................................21
2. Display / LED check mode .................................................21
3. Protection Check mode ......................................................22
5. Owner’s Manual described initialization mode (User Reset) 23
JIG FOR SERVICING
..............................................................24
PROCEDURE AFTER REPLACING THE MICROPROCESSOR,
ETC ..........................................................................................25
Firmware Update Procedure ..................................................26
1. Procedure for upgrading IC214 ..........................................26
TROUBLE SHOOTING ............................................................34
1. OLED dosen't light ..............................................................34
2. No Sound, Noise generated ................................................35
2.1. COMMON(signal) .............................................................35
2.2. COMMON(Power , Control signal line) .............................36
2.3. Analog In .........................................................................37
2.4. USB In ..............................................................................38
2.5. Blutooth In ........................................................................38
2.6. Optical / Coaxial In ...........................................................38
MEASURING METHOD AND WAVEFORMS .........................39
BLOCK DIAGRAM ...................................................................43
POWER DIAGRAM ..................................................................44
WIRING DIAGRAM
..................................................................45
PRINTED CIRCUIT BOARDS ..................................................46
SCHEMATIC DIAGRAMS (1/11) .............................................49
MAIN_ADSP ...........................................................................49
SCHEMATIC DIAGRAMS (2/11) .............................................50
MAIN_DSP-USB_B .................................................................50
SCHEMATIC DIAGRAMS (3/11) .............................................51
MAIN_DIR_FPGA ...................................................................51
SCHEMATIC DIAGRAMS (4/11) .............................................52
MAIN_MCU .............................................................................52
SCHEMATIC DIAGRAMS (5/11) .............................................53
AMP_D_AMP ..........................................................................53
SCHEMATIC DIAGRAMS (6/11) .............................................54
AMP_POWER .........................................................................54
SCHEMATIC DIAGRAMS (7/11) .............................................55
AMP_D_AMP_OUT .................................................................55
SCHEMATIC DIAGRAMS (8/11) .............................................56
AMP_D_AMP_SW_HP_OUT_AUXIN .....................................56
SCHEMATIC DIAGRAMS (9/11) .............................................57
AMP_DAMP_FEEDBACK .......................................................57
SCHEMATIC DIAGRAMS (10/11) ...........................................58
FRONT ....................................................................................58
SCHEMATIC DIAGRAMS (11-1/11) ........................................59
SMPS 1/2 ................................................................................59
SCHEMATIC DIAGRAMS (11-2/11) ........................................60
SMPS 2/2 ................................................................................60
EXPLODED VIEW ...................................................................61
PACKING VIEW
.......................................................................62
SEMICONDUCTORS ...............................................................63
1. IC's .....................................................................................63
2. DISPLAY ............................................................................82
CONTENTS
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