Denon AVR-1912 Service Manual

2
CONTENTS
SAFETY PRECAUTIONS ..........................................................3
NOTE FOR SCHEMATIC DIAGRAM .........................................4
TECHNICAL SPECIFICATIONS ................................................5
DIMENSION ...............................................................................5
CAUTIONS IN SERVICING .......................................................7
Initializing INTEGRATED NETWORK AV RECEIVER ..............7
Service Jig ................................................................................7
DISASSEMBLY ..........................................................................8
1. FRONT PANEL ASSY .........................................................10
2. PCB RS232C (AVR-2112CI only) ....................................... 11
3. PCB HDMI ...........................................................................12
4. POWER TRANS MAIN ........................................................13
5. PCB AUDIO_VIDEO ASSY .................................................13
6. PCB SMPS/PCB SPK .........................................................14
7. PCB REG/PCB REG_CNT ..................................................15
8. RADIATOR ASSY ................................................................16
SPECIAL MODE ......................................................................18
Special mode setting button (for 1912E3 model) ....................18
Special mode setting button
(for AVR-1912E2/EA/E1C,2112CIE3 model) ...........................19
1. µcom/DSP Version display mode ........................................20
2. Errors checking mode (Displaying the protection history) ...23
3. Remote ID Setup mode .......................................................25
4. DIAGNOSTIC MODE
(Video/Audio (signal) path conrmation mode) ...................27
BLOCK DIAGRAM ...................................................................29
JIG FOR SERVICING ..............................................................43
WHEN THE MICROPROCESSOR IS REPLACED
WITH A NEW ONE ...................................................................45
PROCEDURE FOR UPGRADING THE VERSION
OF THE FIRMWARE ................................................................45
1. How to update by DFW .......................................................45
2. How to update by DPMS .....................................................49
ADJUSTMENT .........................................................................56
SURROUND MODES AND PARAMETERS ............................57
TROUBLE SHOOTING ............................................................61
1. POWER ...............................................................................61
2. Analog video ........................................................................62
3. HDMI/DVI ...........................................................................68
4. AUDIO .................................................................................77
5. Network/USB .......................................................................80
6. SMPS ..................................................................................83
CLOCK FLOW & WAVE FORM IN DIGITAL BLOCK .............86
LEVEL DIAGRAM ....................................................................87
PRINTED WIRING BOARDS ...................................................93
7CH AMP ................................................................................93
SMPS .....................................................................................94
SPK ........................................................................................95
REG .......................................................................................97
FRONT_CNT ..........................................................................97
SIDE_CNT ..............................................................................98
REG_CNT ..............................................................................98
RS232C (AVR-2112CI model) .................................................99
SIRIUS (AVR-2112CI model) .................................................99
FRONT .................................................................................100
FUNCTION (1912E3 model) ................................................101
USB (1912E3 model) ............................................................101
FUNCTION (Except the 1912E3 model) ...............................101
USB (Except the 1912E3 model) ..........................................101
FUNCTION CNT (1912E3 model) .........................................102
FUNCTION CNT (Except the 1912E3 model) .......................102
V.AUX ...................................................................................102
H/P .......................................................................................102
AUDIO_VIDEO .....................................................................103
HDMI ....................................................................................104
SCHEMATIC DIAGRAMS ......................................................106
7CH-AMP UNIT (1/2) ............................................................106
7CH-AMP UNIT (2/2) ............................................................107
SPK UNIT ..............................................................................108
SMPS UNIT ...........................................................................109
REG UNIT .............................................................................110
SIDE_CNT UNIT ................................................................... 111
FRONT_CNT UNIT ...............................................................112
SIRIUS UNIT (AVR-2112CI ONLY) .......................................113
RS232C UNIT (AVR-2112CI ONLY) ...................................... 113
AUDIO_VIDEO UNIT (1/3) ....................................................114
AUDIO_VIDEO UNIT (2/3) ....................................................115
AUDIO_VIDEO UNIT (3/3) ....................................................116
HDMI UNIT (1/13) .................................................................117
HDMI UNIT (2/13) .................................................................118
HDMI UNIT (3/13) ...............................................................119
HDMI UNIT (4/13) .................................................................120
HDMI UNIT (5/13) ...............................................................121
HDMI UNIT (6/13) .................................................................122
HDMI UNIT (7/13) .................................................................123
HDMI UNIT (8/13) .................................................................124
HDMI UNIT (9/13) .................................................................125
HDMI UNIT (10/13) .............................................................126
HDMI UNIT (11/13) ................................................................127
HDMI UNIT (12/13) ...............................................................128
HDMI UNIT (13/13) ...............................................................129
FRONT UNIT .........................................................................130
V.AUX UNIT ..........................................................................130
FUNCTION_CNT UNIT .........................................................130
FUNCTION UNIT ..................................................................130
H/P UNIT ...............................................................................130
USB UNIT..............................................................................131
WIRING DIAGRAM ................................................................132
EXPLODED VIEW ..................................................................133
PARTS LIST OF EXPLODED VIEW ......................................135
PACKING VIEW .....................................................................138
PARTS LIST OF PACKING & ACCESSORIES .....................138
SEMICONDUCTORS .............................................................140
1. IC's ....................................................................................140
2. FL DISPLAY.......................................................................171
PARTS LIST OF P.C.B. UNIT ................................................173
PCB 7CH_AMP ASS'Y ..........................................................173
PCB SPK ASS'Y ....................................................................177
PCB REG_CNT ASS'Y ..........................................................180
PCB FRONT ASS'Y...............................................................182
PCB AUDIO_VIDEO ASS'Y ..................................................185
PCB HDMI ASS'Y ..................................................................188

Denon AVR-1912 Specifications

General

Impedance	47 Ω
Receiver type	Surround
Frequency range	10 - 100000 Hz
Input sensitivity	200 mV
Audio output channels	7.1 channels
Audio A/D Converter (ADC)	24-bit/96kHz
Signal-to-Noise Ratio (SNR)	100 dB
Total Harmonic Distortion (THD)	0.08 %
Power output per channel (1KHz@6 Ohm)	125 W
Power output per channel (20-20KHz@8 Ohm)	90 W
HDMI in	6
Composite video in	3
Component video (YPbPr/YCbCr) in	1
Headphone connectivity	6.3 mm
Connectivity technology	Wired
Speakers connectivity type	Banana connector/Binding posts
Audio formats supported	AAC, FLAC, MP3, WAV, WMA
Image formats supported	JPG
Wi-Fi	No
Ethernet LAN	Yes
AM band range	520 - 1710 kHz
FM band range	87.5 - 107.9 MHz
Supported radio bands	AM, FM
Preset stations quantity	56
Supported video modes	1080i, 1080p, 480i, 480p, 576i, 576p, 720p
Analog signal format system	NTSC, PAL
Display	-
Product color	Black
Audio decoders	Dolby Digital EX, Dolby Digital Plus, Dolby Pro Logic II, Dolby Pro Logic IIx, Dolby Pro Logic IIz, Dolby TrueHD, DTS 96/24, DTS Neo:6, DTS-ES, DTS-ES (Discrete 6.1), DTS-ES (Matrix 6.1), DTS-HD
Apple docking compatibility	iPhone, iPod
AC input voltage	120 V
AC input frequency	60 Hz
Power consumption (standby)	0.1 W
Power consumption (typical)	460 W

Weight and Dimensions

Depth	382 mm
Width	435 mm
Height	167 mm
Weight	10200 g