Nad C-446 Service Manual
DRAFT DATE: November 2011
LAUNAM ECIVRES
NAD
Digital Media Tuner
Digital Media Tuner
C 446
C 446
SAFETY INFORMATION
Page 2
C 446 Digital Media Tuner
CUSTOM MANUFACTURED TO NAD SPECIFICATIONS
IN THE PEOPLE`S REPUBLIC OF CHINA
100-240V 50/60Hz 25W
CONTENTS
Page 3
DESCRIPTION
SAFETY INFORMATION ...................................................................................... 2
SPECIFICATIONS ................................................................................................. 4
REAR PANEL / FRONT PANEL VIEW .................................................................. 5
DISASSEMBLY INSTRUCTIONS ......................................................................... 6
WIRING DIAGRAM ............................................................................................... 7
BLOCK DIAGRAM ................................................................................................ 9
SPECIAL FUNCTION KEYS ................................................................................10
PCB LAYOUT ...................................................................................................... 11
SCHEMATIC DIAGRAM ...................................................................................... 17
ELECTRICAL PARTS LIST ................................................................................. 21
EXPLODED VIEW .............................................................................................. 30
EXPLODED VIEW PARTS LIST ......................................................................... 31
PACKING DIAGRAM .......................................................................................... 32
PACKING PARTS LIST ...................................................................................... 33
PAGE
REFERENCE
Page 4
SPECIFICATIONS
FM SEC TION
AM SECTION
Usable Sensitivity (98 MHz) 10 dBμ
Signal/Noise Ratio 65 dB (60 dBμ IHF-WTD Mono)
60 dB (60 dBμ IHF-WTD Stereo)
Frequency Response ±1.5 dB (20 Hz - 15 kHz, 60 dBμ)
Channel Separation (60 dBμ) - 30 Hz 33 dB
1 kHz 40 dB
10 kHz 32 dB
Capture Ratio (40 dBμ) 3 dB
AM Suppression 50 dB (60 dBμ, 100% Mod. FM, 30% Mod. AM)
Image Rejection (119.4 MHz) 70 dB
I.F. Rejection (10.7 MHz) 70 dB
Pilot Suppression (60 dBμ) 60 dB
Total Harmonic Distortion* - Mono 0.4%
Stereo 0.8%
Auto Search Sensitivity 24 dBμ
RDS Decode Sensitivity 26 dBμ
Usable Sensitivity (999/1000 Hz) 55 dBμ
Signal/Noise Ratio (5 mV in) 42 dB
Total Harmonic Distortion (5 mV in) 1.5%
IF Rejection (450 kHz) 40 dB
Image Rejection (F+2xIF) 28 dB
Selectivity 20 dB
Loop Sensitivity (20dB S/N) - 999/1000 Hz 66 dB
603/600 Hz 66 dB
1404/1400 Hz 66 dB
Frequency response (100 - 2.3 kHz, 5 mV) ±6 dB
DAB SECTION
BAND 3
PLAYABLE MEDIA FOR MAT
INTERFACE
GENERAL SPECIFICATIONS
Tuning range 175.280 – 240.000 MHz
Large signal handling capacity 0 dBm
Sensitivity -97 dBm
40 dB
Adjacent channel rejection 40 dB
WAV up to 1.536 mbit/s
FLAC up to 1.5 mbit/s
AAC up to 320 kbit/s
MP3 up to 320 kbit/s
WMA up to 320 kbit/s
Wired 10/100 Ethernet
Wireless (Wi-Fi) 802.11/b/g
Standby power <0.5W
Analog audio output 2 Vrms
S/PDIF audio output 3.3 V
Unit Dimension (W x H x D) - Gross 435 x 99 x 341 mm
Net weight 4.8 kg (10.6 lbs)
Shipping weight 6.5 kg (14.3 lbs)
* 60 dBμ, L=R 75 kHz for 120V version; 40 kHz Dev for 230V version)
information about C 446.
REAR PANEL / FRONT PANEL VIEW
Page 5
REAR PANEL
ANTENNA
FM
GND AM
© NAD C 446
FM ANTENNA TERMINAL
1
AM ANTENNA TERMINAL
2 DAB ANTENNA TERMINAL (230V version model only)
3 AUDIO OUT
4 DIGITAL OUT
5 LOCAL AREA NETWORK (LAN) PORT
6 WIRELESS (WIFI) ANTENNA TERMINAL
WIFI
AUDIO OUT
DIGITAL OUT
DAB
L
R
LAN RS232
DATA PORT
MP DOCK
IR IN
+12V
TRIGGER
IN
3 4 5 6 7 8 9 11101 2
100~240V – 50/60Hz
POWER
ON
12
7 RS 232
8 MP DOCK
9 +12V TRIGGER IN
10 IR IN
11 POWER
12
AC MAINS INPUT
FRONT PANEL
Digital Media Tuner C 446
SOURC E PLAY/PAUS E INFO SETUP BACK
Internet Radio
Magic 89.9
Playing
3 4 5 6 7 8 9 101 2
1 STANDBY BUTTON
2 STANDBY LED
3 SOURCE
4 PLAY/PAUSE
5 INFO
REMOTE SENSOR
6
7 VACUUM FLUORESCENT DISPLAY (VFD)
8 USB
9 SETUP
10 BACK
11
CONTROL/ENTER
CONTROL/ENTER
© NAD C 446
11
DISASSEMBLY INSTRUCTIONS
Page 6
1. Remove machine screws M6.0 x 8.0 ( x 7pcs) from the side panels
Refer to Figure No.1
Figure No.1
2. Pull both sides of the TOP COVER slightly outwards and tilt approx. 35°and then
remove in the direction as indicated.
Refer to Figure No.2
Figure No.2
WIRING DIAGRAM
Page 7
Encode
FPP Board
1
2
3
5
FM/AM Tuner
4
MainBoard
PowerBoard
WIRING DIAGRAM PARTS LIST
Page 8
ITEM Part Number Description Remark
1 14-44604 -01 Cable L=80 mm
2 14-44604 -00 Cable L=205mm
3 14-44624 -00 Cable L=175mm
4 14-98017 -10 Cable
L=50mm
5 14-44610-00 Cable L=200mm
Encode
MainBoard USB
M
a
i
n
B
o
a
r
d
FM/AM Tuner
PowerBoard
to
FPPBoard
to
FPPBoard USB
to FPPBoard
to
MainBoard
MainBoard
t o
BLOCK DIAGRAM
Page 9
RS232
TRIG IN
IR IN
IPOD control
DAB ANTENNA
WIFI ANTENNA
RS232
FM ANTENNA
AM ANTENNA
OPTICAL
LOGIC
Buffer
Key and IR front panel
KUANGXIN FM/AM/RDS MODULE
GP1UV701QS
D1G2V
3
ENCODER
IR TRIG RS232
SPI
RDS DATA
kst-mb114ma1-23
ADC
PCM1808
Transmitter
DIT4096
RS232
SPDIF
Multiplexer
NC7SZ157
SPDIF
SPDIF
FM/AM LO
FM/AM RO
3V3D
Frontier Venice 6.2
DAB/INTERNET RADIO
Main MCU
Renesas M30281
5VA
IIS
IIS
SPI
74LCX244
3V3D
AMS1117
VFD
4VAC 60VD 5V6D
BOE CIG128X32
+12VA
LPF
NE5532
IIS
DAC
CS4392-KZZ
+/-12VA
LPF
NE5532
3V3S
5VA
AMS1117
+/-12VA
+/-12VA
GND
GND
LO
RO
5V6D
ETHERNET
USB
KSZ8851SNL
ETHERNET DRIVER
POWER SWITCH
SPI
5VS 5V6D
+12VA
Standby PSU (25W)
4VAC 60VD 5V6D
Signal
Power
3V3D
5VS 1A (standby mode <0.2W dissipation )
+/-12VA 0.3A
5V6D 1.5A
DUAL 4VAC 0.5A
+60VD 0.1A
control
SPECIAL KEYS
Page 10
Function Keys Notes
Reset AH
Reset C
V FD T est
Source left + BACK
Source right + SETUP
INFO + SETUP
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