Table Of Contents - Denon DNP-720AE Service Manual

CONTENTS
SAFETY PRECAUTIONS ..........................................................3
NOTE FOR SCHEMATIC DIAGRAM .........................................4
TECHNICAL SPECIFICATIONS ................................................5
DIMENSION ...............................................................................5
CAUTIONS IN SERVICING .......................................................6
Firmware update ......................................................................6
Initializing Network Audio Player (Factory Rerset) ....................6
DISASSEMBLY ..........................................................................7
1. FRONT PANEL ASSY ...........................................................8
2. PCB MAIN ............................................................................9
3. SMPS PCB UNIT...................................................................9
4. TUNER PACK......................................................................10
5. WIFI MODULE ....................................................................10
SPECIAL MODE ......................................................................11
Special mode setting button ....................................................11
1. Initialization mode (Factory Reset) ......................................12
2. Initialization mode (User Reset) ..........................................12
3. Version display ....................................................................13
4. Product Mode 1 ...................................................................14
5. Product Mode 2 ...................................................................14
6. Protection history display mode ..........................................15
7. DPMS UP date mode ..........................................................15
8. Update mode (by DFW) ......................................................16
9. MAC Address rewrite mode .................................................16
10.Access to development server mode .................................16
WHEN THE MICROPROCESSOR IS
REPLACED WITH A NEW ONE .............................................17
PROCEDURE FOR UPGRADING
THE VERSION OF THE FIRMWARE .....................................17
TROUBLE SHOOTING ............................................................19
1. OLED dosen't light ...............................................................19
2. Cannot connect to network ..................................................19
3. No Sound, Noise generated ................................................21
CLOCK FLOW & WAVEFORM IN DIGITAL BLOCK ..............25
BLOCK DIAGRAM ...................................................................26
POWER BLOCK DIAGRAM ....................................................27
PRINTED WIRING BOARDS ...................................................28
MAIN ......................................................................................28
SMPS .....................................................................................28
FRONT ...................................................................................30
LED ........................................................................................30
USB ........................................................................................30
KEY ........................................................................................30
SCHEMATIC DIAGRAMS ........................................................31
SMPS UNIT .............................................................................31
MAIN UNIT (1/2)......................................................................32
MAIN UNIT (2/2)......................................................................33
FRONT UNIT ...........................................................................34
LED UNIT ................................................................................34
KEY UNIT ................................................................................34
USB UNIT................................................................................34
WIRING DIAGRAM ..................................................................35
EXPLODED VIEW ....................................................................36
PARTS LIST OF EXPLODED VIEW ........................................37
PACKING VIEW .......................................................................39
PARTS LIST OF PACKING & ACCESSORIES .......................39
SEMICONDUCTORS ...............................................................41
1. IC's ......................................................................................41
2. FL DISPLAY.........................................................................52
PARTS LIST OF P.C.B. UNIT ..................................................53
PCB MAIN ASS'Y ....................................................................53
PCB KEY ASS'Y ......................................................................58
PCB SMPS ASS'Y ...................................................................58
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