NAD M4 User manual

SERVICEMANUAL
SERVICE MANUAL
M4 C/AH
NAD ELECTRONICSINTERNATIONAL
TORONTO
M4 C/AH
FM/AM/DAB/XM TUNER
M4 C/AH
M4
STEREO
FM/AM/DAB/XM TUNER
STEREO
FM/AM/DAB/XM TUNER
STEREO
©NAD 2009

CONTENTS
SECTION 1 . . . .SUMMARY
SECTION 2 . . . .CABINET & MAIN CHASSIS
SECTION 3 . . . .ELECTRICAL
SECTION 4 . . . .REPLACEMENT PARTS LIST

SECTION 1
SUMMARY
CONTENTS
PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS ............. 1-2
SERVICING PRECAUTIONS ...........................................................................1-3
• General Servicing Precautions
• Insulation Checking Prodedure
• Electrostatically Sensitive Devices
SPECIFICATIONS ........................................................................................... 1-4,5
1-1

1-2
SUBJECT: GRAPHIC SYMBOLS
PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS
A.C. VOLTMETER
GOOD EARTH GROUND
SUCH AS THE WATER
PIPE. CONDUIT. ETC
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
CAUTION : DO NOT ATTEMPT TO MODIFY THIS
PRODUCT IN ANY WAY, NEVER PERFORM CUSTOM-
IZED INSTALLATIONS WITHOUT MANUFACTURER’S
APPROVAL. UNAUTHORIZED MODIFICATIONS WILL
NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO
YOUR BEING LIABLE FOR ANY RESULTING PROP-
ERTY DAMAGE OR USER INJURY.
SERVICE WORK SHOULD BE PERFORMED ONLY
AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL
OF THE FOLLOWING SAFETY CHECKS AND SERVIC-
ING GUIDELINES. TO DO OTHERWISE,INCREASES
THE RISK OF POTENTIAL HAZARDS AND INJURY TO
THE USER.
WHILE SERVICING, USE AN ISOLATION TRANS-
FORMER FOR PROTECTION FROM A.C. LINESHOCK.
SAFETY CHECKS
AFTER THE ORIGINAL SERVICE PROBLEM HAS
BEEN CORRCTED. A CHECK SHOULD BE MADE OF
THE FOLLOWING.
SUBJECT : FIRE & SHOCK HAZARD
1.BE SURE THAT ALL COMPONENTS ARE POSI-
TIONED IN SUCH A WAY AS TO AVOID POSSIBILITY
OF ADJACENT COMPONENT SHORTS.THIS IS ESPE-
CIALLY IMPORTANT ON THOSE MODULES WHICH
ARE TRANSPORTED TO AND FROM THE REPAIR
SHOP.
2. NEVER RELEASE A REPAIR UNLESS ALL PROTEC-
TIVE DEVICES SUCH AS INSULATORS, BARRIERS,
COVERS, SHIELDS, STRAIN RELIEFS, POWER
SUPPLY CORDS, AND OTHER HARDWARE HAVE-
BEEN REINSTALLED PER ORIGINAL DESIGN. BE
SURE THAT THE SAFETY PURPOSE OF THE POLAR-
IZED LINE PLUG HAS NOT BEEN DEFEATED.
3. SOLDERING MUST BE INSPECTED TO DISCOVER
POSSIBLE COLD SOLDER JOINTS, SOLDER
SPLASHES OR SHARP SOLDER POINTS. BE CER-
TAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES.
4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE
OR DETERIORATION TO PARTS AND COMPONENTS.
FOR FRAYED LEADS, DAMAGED INSULATION
(INCLUDING A.C. CORD). AND REPLACE IF NECES-
5. NO LEAD OR COMPONENT SHOULD TOUCH A
RECIVING TUBE OR A RESISTOR RATED AT 1 WATT
OR MORE. LEAD TENSION AROUND PROTRUNING
METAL SURFACES MUST BE AVOIDED.
6. ALL CRITICAL COMPONENTS SUCH AS FUSES,
FLAMEPROOF RESISTORS, CAPACITORS, ETC.
MUST BE REPLACED WITH EXACT FACTORY TYPES,
DO NOT USE REPLACEMENT COMPONENTS OTHER
THAN THOSE SPECIFIED OR MAKE UNRECOM-
MENDED CIRCUIT MODIFICATIONS.
7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PER-
FORM AN A.C. LEAKAGE TEST ON ALL EXPOSED
METALLIC PARTS OF THE CABINET, (THE CHANNEL
SELECTOR KNOB, ANTENNA TERMINALS. HANDLE
AND SCREWS) TO BE SURE THE SET IS SAFE TO
OPERATE WITHOUT DANGER OF ELECTRICAL
SHOCK. DO NOT USE A LINE ISOLATION TRANS-
FORMER DURING THIS TEST USE AN A.C. VOLTME-
TER, HAVING 5000 OHMS PER VOLT OR MORE SEN-
SITIVITY, IN THE FOLLOWING MANNER; CONNECT A
1500 OHM 10 WATT RESISTOR, PARALLELED BY A
.15 MFD. 150.V A.C TYPE CAPACITOR BETWEEN A
KNOWN GOOD EARTH GROUND (WATER PIPE,
CONDUIT,ETC.) AND THE EXPOSED METALLIC
PARTS, ONE AT A TIME. MEASURE THE A.C. VOLT-
AGE ACROSS THE COMBINATION OF 1500OHM
RESISTOR AND .15 MFD CAPACITOR. REVERSE THE
A.C. PLUG AND REPEAT A.C. VOLTAGE MEASURE-
MENTS FOR EACH EXPOSED METALLIC PART. VOLT-
AGE MEASURED MUST NOT EXCEED 75 VOLTS
R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C
ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A
POTENTIAL SHOCK HAZARD AND MUST BE COR-
RECTED IMMEDIATELY.
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED
TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE”
THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE
PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.

SERVICING PRECAUTIONS
CAUTION:Before servicing the Stereo Tuner covered by
this service data and its supplements and addends, read and
follow the SAFETY PRECAUTIONS. NOTE: if unforeseen
circumstances create conflict between the following servicing
precautions and any of the safety precautions in this publication,
always follow the safety precautions.
Remember Safety First:
General Servicing Precautions
1. Always unplug the Stereo Tuner AC power cord from the AC
power source before:
(1) Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2) Disconnecting or reconnecting any internal electrical
plug or other electrical connection.
(3) Connecting a test substitute in parallel with an electrolytic
capacitor.
Caution: A wrong part substitute or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.
2. Do not spray chemicals on or near this Stereo Tuner or a-
ny of its assemblies.
3. Unless specified otherwise in this service data, clean
electrical contacts by applying an appropriate contact
cleaning solution to the contacts with a pipe cleaner,
cottontipped swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication
of contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with
which instruments covered by this service manual might be
equipped.
5. Do not apply AC power to this Stereo Tuner and/or any of its
electrical assemblies unless all solid-state device heat sinks
are correctly installed.
6. Always connect test instrument ground lead to the
appropriate ground before connecting the test instrument
positive lead. Always remove the test instrument ground lead
last.
Insulation Checking Procedure
Disconnect the attachment plug from the AC outlet and turn the
power on. Connect an insulation resistance meter (500V) to the
blades of the attachment plug. The insulation resistance
between each blade of the attachment plug and accessible
conductive parts (Note 1) should be more than 1 M-ohm.
Note 1: Accessible Conductive Parts including Metal panels,
Input terminals, Earphone jacks, etc.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples of
typical Es devices are integrated circuits and some field effect
transistors and semiconductor chip components.
The following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1. Immediately before handing any semiconductor component
or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known earth
ground. Alternatively, obtain and wear a commercially
available discharging wrist strap device, which should be
removed for potential shock reason prior to applying power to
the unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an antistatic solder removal device. Some solder
removal devices not classified a “anti-static” can generate
electrical charges sufficient to damage ES devices.
5. Do not use freonpropelled chemicals. These can generate
electrical charge sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads
electrically shorted together by conductive foam, aluminum
foil, or comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective
material to the chassis or circuit assembly into which the
device will be installed.
Caution: Be sure no power is applied to the chassis or circuit,
and observe all other safety precautions.
8.Minimize bodily motions when handing unpackaged
replacement ES devices. (Normally harmless motion such as
the brushing together of your clothes fabric or the lifting of
your foot from a carpeted floor can generate static electricity
sufficient to damage an ES device.)
1-3

AM TUNER SECTION
Usable Sensitivity (999/1000kHz) 30dBμ
S/N Ratio (5mV in) 38dB
THD (5mV in) <3%
IF Rejection (450kHz) >36dB
Image Rejection (F+2xIF) 28dB
Selectivity 17dB
Output 130mV ±20mV
Loop Sensitivity (20dB S/N)
999/1000 kHz 66 dB
603/600 kHz 66 dB
1404/1400 kHz 66 dB
Frequency response (100-2.3kHz,5mV) ±6dB
FM TUNER SECTION
Usable Sensitivity (98MHz) 6dBμ
Signal / Noise Ratio Mono 72 dB
(60 dBμ, IHF wtd) Stereo >66 dB
Frequency Response
(20 Hz - 15 kHz, 60 dBμ) ±1.0 dB
Channel Separation (60 dBμ)
30Hz >33dB
1kHz >42dB
10kHz >35dB
Alternate Channel Sensitivity
(40 dBμ, ±400 kHz) 60 dB
Capture Ratio (40 dBμ) 1.5 dB
AM Suppression
(60 dBμ, 100% Mod.FM, 30% Mod.AM) 65 dB
Image Rejection (119.4MHz) 85dB
I.F. Rejection (10.7MHz) 80dB
Pilot Suppression (60dBμ) 60dB
THD (60 dBμ, L=R 75 kHz for North America version; 40 kHz
deviation for Europe version)
1-4
SPECIFICATIONS

Mono 0.20%
Stereo 0.25%
Auto-Search
Sensitivity On 24dBμ
SensitivityOff 15dBμ
RDS Decode Sensitivity 25dBμ
DAB SECTION
Band lll 174MHz-240MHz
Input 50 Ohm, nominal
Max signal ~-3dBm
Sensitivity ~-96dBm
Adjacent Channel Rejection ~ 35dB
Display 2-line by 16-character
DOT Matrix
Audio Output Stereo 2.5Vp-p
48kHz sample rate 16 bit sample Resolution
Optical S/PDIF IEC60958 Compliant
48kHz sample rate 24 bit sample resolution
1-5

2-1
SECTION 2
CABINET & MAIN CHASSIS
CONTENTS
EXPLODED VIEWS.................................................................................. 2-2
1. Cabinet and main frame section...................................................................2-2
2. Packing accessory section ... .......................................................................... 2-3
3. Exploded view parts list.. ... ... ......................................................................... 2-4

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M4 EXPLODED VIEWS
2-2

AC Cord
DAB Antenna
Shipping Box
Gift Box
polyfoam(down)
Polyfoam(up)
Batteries
Accessory Box
REMOCON
AM Antenna
M4 Packing Accessory Section
2-3

REF.NO. PART NO. DESCRIPTION Qty. REF.NO. PART NO. DESCRIPTION Qty.
1tekcarBRI0-200840-6610PF1sissahC2-100470-76100C
C002 01-50404-10 XM BOARD(AH) 1
01-50403-20
DAB BOARD includes DB1 ( C ) 1
C003 01-54245-20 C425 Main Board(AH Version) 1 S001 61-023206-1 Self Taping Screw (BTB3X6) 13
01-54245-10 C425 Main Board(C Version) 1 S002 61-022506-6 Machine Screw (MB2.5X6-Ni) 2
C004 01-50401-10 MAIN BOARD(AH Version) 1 S003 61-023616-0 Self Taping Screw(TBBT3×16) 4
01-50401-20 MAIN BOARD(C Version) 1 S004 61-224512-1 Hex Head Screw (M4X12) 8
C005 A18-50420-00 R Type Transformer 1 S005 61-224508-1 Hex Head Screw (M4X8) 8
C006 A18-50407-00 standby Transformer 1 S006 61-063106-0 Self Taping Screw (STF3X6) 4
C007 83-043001-0 Foot Assembly 4 S007 61-023106-2 Self Taping Screw (STB3X6) 15
S008 61-024108-1 Self Taping Screw (STB4X8) 4
S009 61-373506-0 Machine Screw (MB3X6W.S-Ni) 8
2)iN-6X3BTS(wercSgnipaTfleS1-601320-16010S12aicsaF0-100470-07100F
4)rC-8X6BM(wercSenihcaM0-805642-16110S1rosruCgniR0-200150-07200F
F003 76-048010-0 VFD window 1 S012 61-023208-0 Self Taping Screw (BTB3X8) C:9
6:HA1redloHrosruC1-100470-77400F
F005 87-048002-0 Input Button Pad 7 S013 61-024106-0 Self Taping Screw (STB4×6) 2
F006 87-048003-0 Power Button Pad 2 S014 61-023508-0 Machine Screw (MB3X8) 4
F007 86-046001-0 Led Lens Gum 1 S015 63-020308-1 Spring Washer 4
4)3M(tuN2-203010-26610S1sneLdeL0-100800-67800F
F009 70-048013-0 Power Button 1
F010 92-048001-0 Spring for Button 9
7nottuBtupnI1-210840-07110F
F012 70-051007-0 Enter Button 1
1draoBPPF00-20405-10310F
11aicsaF0-200470-07J410F
F015 86-046002-0 Fascia Padding 2
1aicsafbuS0-300470-76610F
F017 86-010004-0 3mm Rubber Pad 3
R001 67-074002-1 Rear Panel (C Version) 1
67-074004-1 Rear Panel (AH Version) 1
R002 11-01101-03 Rocker Switch 1
1revoCpoT0-200150-76100T
2x2/1daPRC0-510910-98200T
T003 76-046001-0 Screw Washer 4
XD01 66-083003-0 PCB Left Bracket 1
XD02 66-083004-0 PCB Right Bracket 1
M4 EXPLODED VIEW PARTS LIST


SECTION 3
ELECTRICAL CONTENTS
ELECTRICALTROUBLESHOOTING GUIDE…………………………………..3-2
1. Power check flow……………………………………………………………………………...3-2
2. Preamp operation flow……………………………………………………..…………………3-3,4
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING
1. SYSTEM 18.432MHz CLOCK…………………………………………………...…..………3-5
2. M30281 reset in low active…………………………………………………………………...3-5
3. I2C control SDA and SCL…………………………………………………………………….3-6
4. DAB/XM control RXD……………………………………………………………………….…3-6
BLOCK DIAGRAMS…………………………………………………...…………..3-7
CIRCUIT DIAGRAMS
1. MAIN BOARD DIG SECTION………………………………………………………….….….3-8
2. MAIN BOARD PSU SECTION…………………………………………………………….….3-9
3. FRONT PANEL BOARD………………………………………………………………………3-10
4. DAB BOARD (C VERSION ONLY)…………………………………………………………..3-11
5. XM BOARD (AH VERSION ONLY)…………………………………………………………..3-11
PRINTED CIRCUIT DIAGRAMS
1. MAIN BOARD……………………………………………………………………………….…3-12
2. FRONT PANEL BOARD……………………………………………………………………...3-13
3. DAB BOARD (C VERSION ONLY)………………………………………………………….3-14
4. XM BOARD (AH VERSION ONLY)………………………………………………………….3-15
5. AM FM TUNER BOARD AH & C ...................................................................................3-16

1.Power Check Flow
Power switch on
Orange LED ON? NO
Check Power Switch and its cable
Check F600
Check the standby Transformer
Check U601 on the PSU board
YES
Hear the relay’s click? NO
Check the MCU on the FPP board
Check Q112,Q600 and K600
Check if the main transformers
has been plugged in
YES
+/-13.5V
power supply is correct? NO
Press the standby button
The End
ELECTRICAL TROUBLESHOOTING GUIDE
5V is Right ? NO
YES
Check the MCU on the FPP board
Check Q300--Q303,U302,U303
Check the cable from J300 to J105
Check R621 and R622
Check the main transformer
Check D602,Q601,Q603,Q604,
Q605,Q606,Q607
Check PSU PCB
YES
+5.3V
power supply is correct? NO
Check R619,R620
Check D601
Check U603
YES
+5V power
supply output from U110
is correct?
NO Check the sockets and plugs
Check U110
YES
3-2

2. Operation flow
Power on
Orange LED change to
blue?
NO Check FPP board
YES
Hear the relay’s click? NO Check 5.3V relay supply
Check Q101
Check SOURCE SELECT signal
YES
Relay respond properly? NO
YES
Wait for 10 second
Press band key to change
source FM,AM,DAB/XM
mode
Level=0.5V±0.1V ?
A
Check conection between C425 and main
board
Check RL101 RL102 R184 R185
Check C425 board
YES
THD>3%?
NO
YES
NO
3-3
Press band key to select AM
mode, input AM test signal
1K 500mV sinewave at antenna
side,check output

NO
YES
A
Check U104 input IIs signal
Check U105 U106 U107 U108
check DB1 module
THE END
Press band key to select DAB(or XM)
mode, input DAB (XM) test signal
1K 500mV(0dBFS) sinewave at antenna
side,check output
YES
NO
Press band key to select AM
mode, input AM test signal
1K 500mV sinewave at antenna
side,check output
3-4
DAB:Level=500mV±50mV
THD<0.03%?
XM: Level=2V±0.1V
THD<0.03%?
Level=500mV±50mV
THD<5%?
Check conection between C425 and main
board
Check RL101 RL102 R184 R185

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING
1. SYSTEM 18.432MHz CLOCK
2. M30281 reset in low active


3. I2C control SDA and SCL
4.DAB/XMcontrolRXD


M30281FAHP
MAIN MCU
C425 BOARD
FM/AM SECTION
KEY IR AND DISPLAY
FPP BOARD
NAD DB1 MODULE
DAB SECTION
(C VERSION ONLY)
XM BOARD
XM SECTION
(AH VERSION ONLY)
UART CONTROL LINE
AUDIO DAC
PCM1796
OUTPUT FILTER
IIS SIGNAL
IIS SIGNAL
ANALOG OUT R
ANALOG OUT L
1
3
2
A
1
3
2
A
L
R
ANALOG OUTPUT
L
R
DIGITAL COAX OUT
DIGITAL OPTO OUT
232 TRIG IR INTERFACE
M4 BLOCK DIAGRAM


CIRCUIT DIAGRAMS
1.MAIN BOARD DIG SECTION
3-8
C124
22U/6.3V
R142 10K
C123 10U/10V
C126
10U/10V
C110 100N
GND 1
IN 2
IN 3
EN 4
OUT
5OUT
6OUT 7OUT
8
U111 TPS2011
DGND
C121 100N
1 2 3 4
5
6 7
8
9
11 10
J111 D Connector 9
KEYB1 KEYB2 KEYB3 KEYB4 KEYB5 IR_F KEY_EN
3.3VD
A0
1
A1
2
A2
3
Vss
4SDA 5
SCL 6
WP 7
Vdd 8
U112 24LC16
DGND
DGND
SOURCE SELECT SOURCE SELECT
MAIN MUTE
R187
1K
R188 1K
Q110
2SC3326
3.3VD
C165 10N
J109 IR IN
C166 10N
DGND
IR IN
J110
+12 TRIG IN
DGND
R194
10K
Q111
2SC1815
3.3VD
R108 4K7
R141 10K
R169 3K3
TRIG_ON/OFF
TRIG_IN
R193 330R
R140 10K
R139 10K
R107 4K7
R179 10R
R178 10R
R109 4K7
3.3VD
R110 4K7
1
2 3 4 5 6 7
8
9
10
11
12
13
14
15 16 17
18
19
20
J105
TO FPP_SCH CZ72
5VD
IR_F KEYB1 KEYB2 KEYB3 KEYB4 KEYB5 KEY_DATA KEY_EN
KEY_CLK
5V3
C125
22U/6.3V
MAIN MUTE
DAB/XM_RST
TRIG_ON/OFF
TRIG_IN
Q109
2SC1815 R111
4K7
R191 47K
R192 100R
R190 47K
C150 100N
STANDBY
/EN 1
C1+ 2
V+ 3
C1- 4
C2+ 5
C2- 6
V- 7
RIN 8
ROUT
9/INV
10 DIN
11 FCON 12 DOUT
13 GND
14 VCC
15 /FCOFF 16
U115 MAX3221
C162
100N
C161 100N
C164 100N
C163 100N 232GND
C160 100N
3.3VD
232GND
232GND
R196 330R R195 330R
R232_RX R232_TX
DGND
KEY_CLK KEY_DATA
R136 4K7
R137 4K7
5V3_EN
3.3VD
C168 100N
3.3VD DGND
C171
100N
C170 100N
DAB/XM_RX DAB/XM_TX
Y102 18.432 MHz
C172
20P
C173 20P
DGND DGND
R127 100K
Q103 DTC114
Q104 DTC114
Q107 DTC114
R123 NC
R130 NC
R131 NC
R132 33R
R133 33R R134 33R
R165
3K3
R166 3K3
R167 3K3
3.3VD 3.3VD 3.3VD
I2C_CLK I2C_DATA
IR IN
R206 33R
DGND
C175 100N
C178 10U/10V
3.3VD
C174 100N
DGND
G1
OUT 2
IN 3
O
4
U118 AMS1117-3.3
3.3VD
C181
10U/10V
5VD
C180 100N
C182
10U/10V
R146 2R7
DGND DGND
C183 100N
C191 100N
XM1 HOLE
XM2 HOLE
XM3 HOLE
XM4 HOLE
XM5 HOLE
C193 22N
DGND
R200 100R R201 100R
3.3VD
C197 100N
C151 100N
C199 100N
C141 100N
DGND
DGND
3.3VD
5V3
11 22
33
44 55 66 77 88 99
10 10
11 11
12 12
13 13
14 14 15 15
J117 TO FM/AM BOARD
SCKFM SDAFM
R186 33R
R115 33R
FM RST
TPG2TPG1
ZEROL
1
ZEROR
2
MSEL
3
LRCK
4
DATA
5
BCK
6
SCK
7
DGND
8
VDD
9
MS
10
MDI
11
MC
12
MDO
13
RST
14 VCC2R 15
AGND3R 16
IOUTR+ 17
IOUTR- 18
AGND1 19
IREF 20
VCOMR 21
VCOML 22
VCC1 23
AGND2 24
IOUTL+ 25
IOUTL- 26
AGND3L 27
VCC2L 28
U104 PCM1796
R103 10K
3V3
LRCKO DATAO BCLKO MCLKO
C106 100N
C122
10U/10V
R119
10K
R120
10K
DGND
SDA SCL
DGND
DXRST
Vin
3
GND
1
Vout 2
U110 LM1117MPX-5.0
+13.5V
C117 100N
R177 10R
C147 10U/16V
5VA
2 3
1
U105A OP275
6 5
7
U105B
OP275
R144 820R
C111 100N
C112 100N
-13.5V
+13.5V
R143 820R
2 3
1
U107A OPA2134
R149 360R R150 360R
R157 330R
R158
330R
R153 620R
R154 620R
C132 2N7 C131 2N7
C129 15N
C114 100N
C115 100N
C128 4N7
C127
4N7
2 3
1
U106A OP275
6
5
7
U106B OP275
R145 820R
C113 100N
C118
100N
R148 820R
2
3
1
U108A OPA2134
R151 360R
R152 360R
R159 330R R160 330R
R155 630R
R156 630R
C136 2N7 C135 2N7
C130 15N
C119 100N C120 100N
C134
4N7
C133
4N7
R170 300R
R171 300R
5V3
1 2 3
J102 FROM C425 BOARD
R185 0R
R184 0R
C156 100P C155 100P
J103 LOUT J104 ROUT
5V3
R183 4K7
R181 4K7
DGND
Q102 2SC1815
C154 10N
D104 1N4148
R122 1K
R121 1K
R182 4K7
R180 4K7
DGND
Q101
2SC1815
C153 10N
D103 1N4148
C139 8N2
C140 8N2
6 5
7
U107B OPA2134 C137 22P
R162 3K3
R161 3K3
6 5
7
U108B OPA2134
C138 22P
R164 3K3
R163 3K3
1
3
2
RL102A HFD3
4
6 5
RL102B
HFD3
78
RL102C HFD3
1
3 2
RL101A HFD3
4
6 5
RL101B HFD3
78
RL101C HFD3
D101 2V4 D102 2V4
DGND
C198 100P C116 100P
C108
220N
C105 47UF/16V
C109
220N
C107 47UF/16V
84
U105C OP275
84
U107C OPA2134
84
U106C OP275
84
U108C OPA2134
R175 22K
R176 22K
I2C_CLK
I2C_DATA
5V3_EN
DGND
3.3VD
1 2 3 4
5
6 7
8
9
10
11
12
13
14
15
16
17
18
19
20
J101 TO DAB/XM_SCH J301
DGND
DAB/XM_TX DAB/XM_RX
DAB/XM_RST
LRCLK
DATA BCLK
MCLK
MUTE/UNLOCK
3V3
1G
1
A1
21Y1 18
A2
41Y2 16
A3
61Y3 14
A4
81Y4 12
VCC 20 GND
10
2G
19
B1
11 2Y1 9
B2
13 2Y2 7
B3
15 2Y3 5
B4
17 2Y4 3
U100 74LCX244
3V3
DGND
C100 100N
DGND
IIS_RATE DT_LNK DT_ANTREV
IIS_RATEO DT_LNKO DT_ANTREVO
R102 100R
R104 100R
R101 100R
R203 100R
LRCLK
DATA BCLK MCLK
IIS_RATE
DT_LNK
DT_ANTREV
MUTE/UNLOCK
BREAK
DGND
IIS_RATEO DT_LNKO DT_ANTREVO BREAK
a1 1
gnd 2
a2 3
y2
4vcc
5y1
6
U103 NC7WZ16
DXRSTA FM RSTA
DXRST FM RST
3V3 DGND
C103
100N
Q106 2SA1015
Q100 DTC114
R125 4K7
DGND
FMP_EN
1
2
J100 CON2
R202 10R
3V3
C102 100N R129
10K
DGND 3.3VD
DGND
C101 100N
VCC
14
GND 7
4A
12 4QE
13
4B
11
3A
93QE
10
3B
8
2A 5
2QE 4
2B 6
1A 2
1QE 1
1B 3
U135 74CB3Q3125PW
DGND
I2C_CLK I2C_DATA
Q105 DTC114
R118
4K7
DGND
3.3VD
3V3
R106 0R
R112 0R R113 100R
3.3VD
R114 100R
R100 100R
R117 100R
DGND DGND
G1
OUT 2
IN 3
O
4
U102 AMS1117-3.3
3V3
C144
10U/10V
5V3
C142 100N
C145
10U/10V
R189 2R7
DGND DGND
STANDBY
HS4-B007-M4-PSU-VM1_0 HS4-B007-M4-PSU-VM1_0.SCH
R205
1MEG
1 2
3 4
5 6 7 8
910 11 12
13 14
J112
HEADER 7X2 2.54 pitch
C194 22UF/16V
1G
1
A1
21Y1 18
A2
41Y2 16
A3
61Y3 14
A4
81Y4 12
VCC 20 GND
10
2G
19
B1
11 2Y1 9
B2
13 2Y2 7
B3
15 2Y3 5
B4
17 2Y4 3
U109 74HCT244
3.3VD
DGND
DGND
DGND DGND
R208 33R
R209 33R
R207 33R
R210 33R R211 33R
R212 33R
P102
57
P91
1
P90
2
CNVSS
3
P87/XCIN
4
P86/XCOUT
5
RESET
6
XOUT
7
VSS
8
XIN
9
VCC
10
P85/NMI
11
P84/INT2
12
P83/INT1
13
P82/INT0
14
P81
15
P80
16
P77 17
P76 18
P75 19
P74 20 P73 21 P72 22
RXD2/P71 23
TXD2/P70 24 TXD1/P67 25
RXD1/P66 26
P65 27 P64 28 P33 29 P32 30
P31 31
P30 32
TXD0/P63 33
RXD0/P62 34
P61 35
P60 36
P27 37
P26 38
P25 39
P24 40
P23 41
P22 42
SCL/P21 43
SDA/P20 44
P17 45
P16 46
P15 47
P03 48
P02
49
P01
50
P00
51
P107
52
P106
53
P105
54
P104
55
P103
56
P101
58
AVSS
59
P100
60
VREF
61
AVCC
62
P93
63
P92
64
U117 M30281FAHP
RESET
1GND 2RESET
3
VDD 5
MR 4
U119 TPS3825
DGND
R105 33R
CLK2 P73
CLK2 P73
a1 1
gnd 2
a2 3
y2
4vcc
5y1
6
U114
NC7WZ16
3V3
DGND
R124 47K
R126 47K
3.3VD
1
2
J107
TO C425 UART
3V3
R135 47K
R138 33R
R168 47K
DGND
CLK1 BUSY
FM_TX
FM_RX
FMP_EN
R198 33R
R172 33R
R173 33R
R174 100R
CNVss
CE
RESET
CLK1 BUSY
TPG4 TPG3 TPG5
TPG6
CNVss CE RESET
R232_RX R232_TX
DGND 3.3VD
3.3VD
DGND
3.3VD DGND
C104 22N
AGND
R199 100R
R116 100R
DGNDAGND
D105
1SS352
D106 1SS352
AGND AGND
D107
1SS352
D108 1SS352
DGND DGND
C179 22N
R147 10R
D109
1SS352
D110 1SS352
232GND
C177 10U/10V
R213 10R
DGND
1
2
3
C195
EMI100p
1
2
3C196
EMI100p
R215 100R
R214 100R
TPG7 TPG8 TPG9
TPG10
DGND
R216 0R
1
2
J106 CON2
Q115 2SA1015
R217 4R7
Q113 DTC114
DGND
Q114
2SC3326
R218 4K7
R219 4R7
MB 1mm MA 1mm
C143
10U/10V
C146 100N
R220 47K
3.3VD

CIRCUIT DIAGRAMS
2.MAIN BOARD PSU SECTION
3-9
C614
2200uF/25V
C617 100N C623
100uF/16V
C619 100N
D602 DB104
C615
2200uF/25V
C618 100N C624
100uF/16V
C620 100N
AGND
C613
3300UF/16V
C616 100N
D601 DB104
5V3
DGND
K600 Relay-SPST
D600 DB104
5VD
1
2 3 4 5
J604 Header 3
+13.5V -13.5V
R622 0.33R 1/4W FR
R620 0.33R 1/4W FR
1
2 3 4 5
J605 5*3.96
Q600 2SC1815
C610 10N
DGND
R603 1K
R602 1K
C600 4N7/400V
POWER SWITCH
1
2
3
J600 CON3
L600 10mH UF10.5
C611 10N/275V
S4
J606 PLUG AC MALE2
C612
10N/275V
F600
250mAT/250V JP600
230V
JP602 120V
D604 1N4148
F606 500mAT/250V
JP601 230V
JP603 120V
S2
S1
R619 0.33R 1/4W FR R621 0.33R 1/4W FR
AGND
Main transformer
120VAC
230VAC
120C BREAKER
13.5VAC13.5VAC 8VAC
S5
STANDBY
R600 649R/1%
R601 200R/1%
C608 10U/50V
C609 100uF/16V C607
100N
C606 100N
C605 3300UF/16V
R618 0.33R 1/4W FR
R617 0.33R 1/4W FR
1
2
3
4
5
6
7
8
J601 TO 425 POWER
AGND
C601 220N
C602 220N
C603 220N
C604 220N
AGND
S3
Q601 2SC2690
Q602 2SA1220
Q603 2SA1015
Q605
2SA1015
Q604 2SC1815
Q606
2SC1815
R610 8K2
R608 120
R611 8K2 R609
120
U602 TL431 R613
1K1/1%
R612
4K99/1%
C625
10U/50V
R607 2R2 2W R606 2R2 2W
R615 2K21/1% R616 2K/1%
Q607 2SA1015
R614 100R
C626 10U/50V
IN
U603
LM317M
C627 47P
1
2 3 4 5
J602 CON5
1
2
J603 2*3.96
C628 4N7/400V
1AT/120V
500mAT/120V
H1 HEATSINK
H2 HEATSINK
H3 HEATSINK
1
2
3
U601 LM7805
C630
100uF/16V
C631 100N
5VD
DGND
C629 100P
H4 HEATSINK
Q112
DTA114
R204 100K
3.3VD
DGND
-13.5V
+13.5V