Nad M-22 Service Manual

NAD

SERVICE MANUAL

M22

STEREO

M22

STEREO

AMPLIFIER

AMPLIFIER

TABLE OF CONTENTS

DESCRIPTION P A G E

SERVICE CAUTION…………………………………………………………....3-4

SPECIFICATIONS………………………………………………………….... 5

WIRING DIAGRAM…………………………………………………………….....6

BLOCK DIAGRAM…………………………………………………….. ….......7-9

TROUBLE SHOOTING A GUIDE…………………......................................10

TROUBLE SHOOTING B GUIDE…………………......................................11

CIRCUIT DIAGRAMS

PCB LAYOUT………………………………………………………………..25-30

ELECTRICAL PARTS LIST…………………………………………......31-50

EXPLODED VIEW…………………………………………………………. 51-54

EXPLODED VIEW PARTS LIST……………………………………………....55

………………………………………………..…......12-24

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
METALPART

CAUTION : DO NOT ATTEMPT TO MODIFY THIS
PRODUCT IN ANY WAY, NEVER PERFORM CUSTOM­IZED INSTALLATIONS WITHOUT MANUFACTURER’S
APPROVAL. UNAUTHORIZED MODIFICATIONS WILL
NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO
YOUR BEING LIABLE FOR ANY RESULTING PROP­ERTY DAMAGE OR USER INJURY.

SERVICE WORK SHOULD BE PERFORMED ONLY
AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL
OF THE FOLLOWING SAFETY CHECKS AND SERVIC­ING GUIDELINES. TO DO OTHERWISE,INCREASES
THE RISK OF POTENTIAL HAZARDS AND INJURY TO
THE USER.

WHILE SERVICING, USE AN ISOLATION TRANS­FORMER 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 ESPE­CIALLY IMPORTANT ON THOSE MODULES WHICH
ARE TRANSPORTED TO AND FROM THE REPAIR
SHOP.

2. NEVER RELEASE A REPAIR UNLESS ALL PROTEC­TIVE DEVICES SUCH AS INSULATORS, BARRIERS,
COVERS, SHIELDS, STRAIN RELIEFS, POWER
SUPPLY CORDS, AND OTHER HARDWARE HAVE­BEEN REINSTALLED PER ORIGINAL DESIGN. BE
SURE THAT THE SAFETY PURPOSE OF THE POLAR­IZED LINE PLUG HAS NOT BEEN DEFEATED.

3. SOLDERING MUST BE INSPECTED TO DISCOVER
POSSIBLE COLD SOLDER JOINTS, SOLDER
SPLASHES OR SHARP SOLDER POINTS. BE CER­TAIN 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 UNRECOM­MENDED CIRCUIT MODIFICATIONS.

7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PER­FORM 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 TRANS­FORMER DURING THIS TEST USE AN A.C. VOLTME­TER, HAVING 5000 OHMS PER VOLT OR MORE SEN­SITIVITY, 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. VOLT­AGE ACROSS THE COMBINATION OF 1500OHM
RESISTOR AND .15 MFD CAPACITOR. REVERSE THE
A.C. PLUG AND REPEAT A.C. VOLTAGE MEASURE­MENTS FOR EACH EXPOSED METALLIC PART. VOLT­AGE 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 COR­RECTED 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

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 amplifier AC power cord from the
AC power source before:
(1) Removing or reinstalling any component, circuit board,

(2) Disconnecting or reconnecting any internal electrical
(3) Connecting a test substitute in parallel with an electrolytic
Caution: A wrong part substitute or incorrect polarity

2. Do not spray chemicals on or near this Stereo amplifier or
any 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 amplifier 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.

: Before servicing the Stereo amplifier covered by

module, or any other assembly.

plug or other electrical connection.
capacitor.

installation of electrolytic capacitors may result in an
explosion hazard.

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.)



FRANÇAIS ESPAÑOL ITALIANO DEUTSCH NEDERLANDS SVENSKA РУССКИЙ

SPECIFICATIONS

OVERALL SPECIFICATIONS

Continuous output power into 8 ohms and 4 ohms ≥ 250 W (ref. rated THD, 20 Hz – 20 kHz, both channels driven)
Rated THD (250 mW to rated power, CCIF IMD, DIM 100) ≤0.005 % (ref. 20 Hz - 20 kHz)
IHF dynamic power 8 ohms : 355 W

4 ohms :640 W
2 ohms : 620 W

Damping factor >800 (ref. 8 ohms, 50 Hz and 1 kHz)
Input sensitivity 1.6 V (ref. rated power)
Signal-to-noise ratio, A- weighted > 98 dB (ref. 1W)
Signal-to-noise ratio, A- weighted > 120 dB (ref. rated power)
Frequency response ± 0.1 dB (ref. 20 Hz - 20 kHz)

- 2.5 dB at 3 Hz and 100 kHz

Time to go to Standby mode at no input signal ≤ 30 minutes

POWER CONSUMPTION

Rated power 640 W (120V 60Hz, 230V 50Hz)
Standby power < 0.5 W
Idle power < 40 W

DIMENSION AND WEIGHT

Unit dimensions (W x H x D) * 435 x 103 x 379 mm

17 1/8 x 4 1/16 x 14 15/16 inches

Shipping weight 15.0 kg (33.1 lbs)

* - Gross dimension include feet, front panel and rear panel extensions (knobs, buttons, speaker terminals, sub fascia, etc.)
NAD SHALL NOT BE HELD LIABLE FOR ANY TECHNICAL OR USER INTERFACE DISCREPANCIES IN THIS MANUAL. THE M22 SERVICE MANUAL MAY BE SUBJECT TO CHANGE
WITHOUT PRIOR NOTICE. CHECK OUT WWW.NADELECTRONICS.COM FOR THE LATEST VERSION OF THE M22 SERVICE MANUAL.

5

6

unbalanced

Block diagram

Analog Input

balanced

Relay

OP

LM E49720

LED

CM R

TL072

DC servo

TL072

Clipping controler

OPA2134

OP

LM E49720

Hypex

NC400 OEM M odule

TOUCH

CY8CM BR2044

TRIGGER

3.5mm

Audio sense on/off

IIC

M icro controller
IIC/SPI/GPIO
PIC18F26K20

100-120V A C

220-240V A C

STB PSU

5V

AC

LDO

M AIN PSU

STB

3V3

Current sensor

ENABLE

+/-VB

+/-VDR

7

+/-VAUX

Regulated supply

LM 317/LM 337

TL084CN

+/-17.5V

+/-14.5V

Regulated supply

LM 317/LM 337

7

PIC18F26K20

MCU BOARD

Table Pointer<21>

inc/dec logic

21

Address Latch

Program Memory

(8/16/32/64Kbytes)

Data Latch

Instruction Bus <16>

(3)

OSC1

(3)

OSC2

T1OSI

T1OSO

(2)

MCLR

V

VDD,

SS

PCLATU

20

8

Table Latch

ROM Latch

Instruction

Decode and

Control

Internal

Oscillator

Block

LFINTOSC

Oscillator

16 MHz

Oscillator

Single-Supply
Programming

In-Circuit

Debugger

8

PCLATH

PCH PCL

PCU

Program Counter

31-Level Stack

STKPTR

IR

State machine
control signals

Power-up

Oscillator

Start-up Timer

Power-on

Watchdog

Brown-out

Fail-Safe

Clock Monitor

Data Bus<8>

8

Timer

Reset

Timer

Reset

Data Latch

Data Memory

Address Latch

Data Address<12>

4

BSR

FSR0
FSR1
FSR2

inc/dec

logic

Address

Decode

3

BITOP

8

Precision
Band Gap
Reference

12

12

Access

Bank

PRODLPRODH

8 x 8 Multiply

W

8

8
ALU<8>

8

FVR

PORTA

4

12

PORTB

8

PORTC

8

8

8

PORTE

RA0/AN0
RA1/AN1
RA2/AN2/VREF-/CVREF
RA3/AN3/VREF+
RA4/T0CKI/C1OUT
RA5/AN4/SS
OSC2/CLKOUT
OSC1/CLKIN

RB0/INT0/FLT0/AN12
RB1/INT1/AN10
RB2/INT2/AN8
RB3/AN9/CCP2
RB4/KBI0/AN11
RB5/KBI1/PGM
RB6/KBI2/PGC
RB7/KBI3/PGD

RC0/T1OSO/T13CKI
RC1/T1OSI/CCP2
RC2/CCP1

RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT

MCLR/VPP/RE3

/HLVDIN/C2OUT

(3)

/RA6

(3)

/RA7

(1)

(1)

(2)

BOR

HLVD

FVR

CVREF

Note 1: CCP2 is multiplexed with RC1 when Configuration bit CCP2MX is set, or RB3 when CCP2MX is not set.

2: RE3 is only available when MCLR
3: OSC1/CLKIN and OSC2/CLKOUT are only available in select oscillator modes and when these pins are not being used as digital I/O.

Refer to Section 2.0 “Oscillator Module (With Fail-Safe Clock Monitor)” for additional information.

Data

EEPROM

ECCP1

CCP2

functionality is disabled.

MSSP

Timer2Timer1 Timer3Timer0

FVR

EUSARTComparator

ADC

10-bit

8

TNY274
SMPS STB BOARD

BYPASS/

MULTI-FUNCTION

(BP/M)

115 μ

A 25 μ

ENABLE/

UNDER-

VOLTAGE

(EN/UV)

A

ENABLE

1.0 V + V

1.0 V

DRAIN

REGULATOR

5.85 V

(D)

LINE UNDER-VOLTAGE

6.4 V

AUTO­RESTART
COUNTER

RESET

FAULT

PRESENT

BYPASS

CAPACITOR

SELECT AND

CURRENT

LIMIT STATE

MACHINE

5.85 V

4.9 V

BYPASS PIN
UNDER-VOLTAGE

+

-

V

I

LIMIT

CURRENT LIMIT
COMPARATOR

­+

JITTER

CLOCK

T

DC

MAX

THERMAL

SHUTDOWN

OSCILLATOR

SRQ

Q

LEADING

OVP

LATCH

EDGE

BLANKING

SOURCE

(S)

9

No Power or Power shuts off

immediately

TROUBLESHOOTING A GUIDE

Logo Amber LED on?

YES

Touch Power key

YES

Check STB board
5V RIGHT?

YES

Check LED board

5VL RIGHT?

YES

Check Q110 Q111 Q114 Q115 Q116 circuit
Check PWM signal
Change LED board

NO

check IC301 circuitNONO
change STB board

Check L104 C175 C176

Logo led turn white?

YES

NO

Logo led turn red?

YES

Check PSU board

+/-VB +/-VAUX +/-VDR RIGHT?

YES

Check MCU Board

VPP VPI +/-17.5V +/-VDR RIGHT?

Check MCU Board

NO

NO

NO

Logo led turn off?

YES

Check STB board

STB 3V RIGHT?

YES

Check U1 U5 PWM circuit
Change PSU Board

Check Q123 Q124 circuit
Change MCU Board

NO

Check MCU board:Q131 circuit
Check STB Board:Q301 K301 circuit

YES

Check U104,
Check LED control signal
Change MCU board

B

10

TROUBLESHOOTING B GUIDE

B

Rear panel led show green?

YES

Apply 1khz sinewave to DUT

Amplifier output correct?

NO

NO

YES

Check Q500 Q502 Q508 circuit

Change NC400 OEM BOARD

INC INH signal correct?

NO

NO

led turn off?Rear panel led show red?

YES

Check D500 U505 circuit,

check+/-14.5V,5V Right?

NO

checkQ505 Q506 Circuit
change AMP board

YES

F i n i sh

YES

Change NC400 OEM BOARD

YES

checkU500 U501 U502 U503 Circuit
checkQ503 Q504 Circuit
change AMP board

11

CIRCUIT DIAGRAM

1.MCU VM1.0

0.22u/16v

AudioS

100K

GND

U102C

TL084

12K

C116
2N2

C117
2N2

100R
100R
100R
100R
100R
100R
100R
100R

P111

TO MAIN

GND

1
2
3
4

GND

9
10

12
13

1
2
3
4
5
6
7

GND

1K

GND

U104

q1
q2
q3
q4
q5
q6
q7
gnd8q'h

74HC595

R151

10K

R167

10K

R176

16

vcc

15

q0

14

ser

13

/g

12

rck

11

sck

10

/sclr

9

10R

8

U102D
TL084

i d l i n g 0 V

TP1

VCLIP0
VCLIP1

P100 TO AMP board A

GND

VPPi

VPNi

S

GPOb0
GPI0

5VS
GPOb1

GPI1

GND

0R
0R

GND

VPPi

VPNi

GND

0R
0R

R130
R131

R172
R174

AMP MODUL E1

5V

AMP MODUL E2

3536
3334
3132
2930
2728
2526
2324
2122
1920
1718
1516
1314
1112

910
78
56
34
12

P101 TO AMP board A

3536
3334
3132
2930
2728
2526
2324
2122
1920
1718
1516
1314
1112

910
78
56
34
12

trig in

17-02001-55

J101A

SW1

2 1

SW(TOUCH)

Whi t e l ed br i ght ness ADJ

R119
R120

R121
R123
R126
R128

R158
R161

R165
R168
R169
R170

GND

C101
10N

VPPi

VPNi

0R
0R

0R
0R
0R
0R

0R
0R

GND

VPPi

VPNi

0R
0R

3K9
0R
0R
0R

0R
0R

5
4
3
2
1

10N

C109

R284

470R

+17.5V-17.5V

VDR­VDR+

SCL
SDA
GPOa0

R133
R135

VDR­VDR+

SCL
SDA
GPOa1

R177
R178

GNDGND

-17.5V
+17.5V

+17.5V-17.5V

GNDGND

-17.5V
+17.5V

R287

232 gnd

C102
10N

GND

VCLIP0
AudioS

C108
10N

GND

VCLIP1
AudioS

10KJ

232 gnd

R288

D107
4V7

GND

D114
4V7

GND

1

PB11PB2

C165

D138

6k8

100N

4v7

R136

200R

R137

200R

U102E
TL084

D106
4V7

GNDGND

GPOa0
GPOb0
GPOa1
GPOb1

A-LED
W/R-LED

SCL

SDA

D113
4V7

GNDGND

P110

TO MAIN

14

R163

+17.5V

4

11

-17.5V

D105
4V7

R209A
R209C

R209D
R213A
R213B
R213C
R213D

D112
4V7

1
2
3
4

C100

R117

R285

47KJ

3V3D

100R
R226

R107

GND

R290

5VA

R127

GND

1

U102A
TL084

U102B
TL084

7

C136

100N

3V3D

10K

3V3D

R100

100K

GND

1K

R116
100K

D111

ISS352

10K

C105
10U

R152
330K

GND

2
1

R108

2
3

12
13

3
2

5
6

10K

C140
100N

3V3S

C164

100n

U109

a23y2
gnd
a1

NC7WZ17

R101

47K

GND

R153
330K

vcc

y1

U100A
LM324

U100C
LM324

R214

4
5
6

1

14

-17.5V

GND

470N
C112

C114
1U

3V3S

R286

R164

120R

R289

120R

47K

R297

R319

1K5

NCK0R209B
NM OS I

NCS1

GPI0

GPI1

10k

3V3D

R115

15K

R125

15K

C115

10n

R219
R222
R225
R228

R231

R240

R244

10k

R296

GND

R16047K

R171
10K

GND

GND

GND

VAUXa

GND

GND

VHP1

GND
3V3S

TRIGON_OFF
TRIGIN

10

3

3
1

1

33K

100R
100R
100R
100R

100R

0R

0R

5
6

9

2

R325

D160

4v7

100K
R111

R129
100K

2

R201

R208
R210

R216

U100B
LM324
U100D
LM324

C137
NC

TRIGON_OFF

7

8

Q118

2SC3324

5K1

1k

10k

180k

22k

TRIGIN

5VA

GND

R175

4v7

D118
3V6
C125
100N

D119
3V6
C133
100N

D101

ISS352

D104

ISS352

D159

MCLR

LM324

GND

C174

R112

U100E

100R

3

2

7K5

22u/ 6v3

GND

5K6

5VA

GND

R139

R180

R245

10
11
12
13
14

411

Q117
2SA1312

U105

1
2
3
4
5
6
7
8
9

PIC18F26K20

R113

5K6

1

C104

2

100N

1

2

41

Q113
BCV62B

MCLR/VPP/RE3
RA0/AN0/C12IN0­RA1/AN1/C12IN1­RA2
RA3
RA4
RA5/HLVDIN
VSS
OSC1/CLKIN/RA7
OSC2/CLKOUT/RA6
RC0
RC1
RC2
RC3/SCK/SCL

PWM-LED

100R

Q135

DTC114E

Q132

APM2313

L101
742792662

5VA

GND

D

K A

Q104
2SA1312

R122

5K1

2N2
C107

D109
ISS352

R173

22K

R179

22K

GND

G

R239
10K

GND

GND

R141

100R

D110
15V

C113
10U/35V

06- 100 2 1 - 06

RB7/KBI3/PGD
RB6//KBI2/PGC
RB5/KBI1/PGM

RB4/KBI0

RB3/AN9

RB2/INT2

RB0/INT0/FLT0/AN12

S

RB1/INT1

RC7/RX/DT
RC6/TX/CK

RC5/SDO

RC4/SDI/SDA

GND

R124

R241
10k

5VEN

C146
1N

R114

10R

C103
10U

100R

CLIPPING CONTROL

28
27
26

R223

25

R220

24
23

R229

22

R232

21

R233

20

VDD

19

VSS

18
17
16
15

3V3S3V3D

5VS

AUDIO SENSE

VPP

2.5mR

R144

1

VPPi1

JP100

2

2

3

JP101

JP102

R 33 1

3V3S

22u/ 6v3

GND

10 K

100R
100R

100R
100R

100R

GND

GND

R 33 0

GND

R235
100R

C139
100N

VPPi
VPNi

VPNi

10 K

PG D A T A
PG C LK

3V3S

GND

3

3V3S

RXD
TXD

C138

A udioSa

O V L
nA M P O N

G N D

3V 3S

STBY

C158

D TA 114
Q 131

100n

D 123

4V 7

C151

22N

C177
10U

R339

XM104
HOLE

100R

D166
CD4148WP

680

D169
16V

D167
CD4148WP

R346

680

XM101
HOLE

C126

GND

C184
10U

220U

GND

D146
ISS352

ISS352

-17.5VVAUX-

C130

D135
ISS352

ISS352

D147

100R

C168
22N

+17.5VVAUX+

C124
100N

D137

R283
C163 22N

GND

R293

GND

VAUXa

220U

C129

100R

R185

10K

100N

XM102
HOLE

D140
ISS352

D139

ISS352

100R

R291

GND

C166
22N

XM100
HOLE

D134
ISS352

D136
ISS352

R282
C162

GND

XM103
HOLE

D141

10K

C178

47P

R348

C179

47P

R347

680

R349

D170

15V

680

ISS352

D142

ISS352

100R

R292

GND

C167

22N

C182
1U

C181

1U

R338

680

R340

680

D168
16V

CON106

1

2

345

678

GND

Q105

GND

D124

ss12

C156

470U/6V3

R309

10K

e c

742792662

L102

VHP1

1

2

120K

5VS

nFATAL
OVL
nAMPON
AMPOFF

R186

D154
BAV99

3

R326

10n
C159

100

VPPi

GND

R203

180k

VPNi

VAUX+
VAUX-

8
7
6
5

STB_EN

VPP

Rt

GND

TXD
RXD

D EBU G

PS_EN

FB100

100M/600R

VDR+

VDR-

RT1
NTC

Q120
FMMT593TA

R327

120K

R328

4K3

C147

100N

GND

C152

GND

100R
100R

PWM-LED

GND

1
2
3
4

GND

5VS

GND

GND

10K

MCLR

PGDATA
PGCLK

100n

GND

POWER_ON

D158
4v7

R 20 2

0R

DTC114EKA

b

C 143
100N

3

1

2

G

IN

OUT

O

22u/6V3

4

3V3S

U108

ASM1117-3.3

C155
100n

R329

3V3S

R268
R269

A-LED

C173
100N

L103
FB

W/R-LED

3V3D

5VS

P103

10
9
8
7
6
5
4
3
2
1

FROM PSU

P112

1
2

3

FROM STB
P105

1

2

3

4

5

6

From PSU

D155
3V6

CON103

ICSP

3V3S

P109

4
3
2
1

Header 4

R323

0.47

1 2

22k

220U

C123

GND

R332

C122

100N

C127

220U

220U

GND

GND

C183
10U

22k

C180
10U

R334

D162

22k

R333

R324

0.47

D163 BAV99

22k

R335

C131

220U

C128

GND

HS1

H eatsin k

C132

100N

1
2
3
4
5

3

3

BAV99

Q121
BC846B

BC856B
Q126

Q124

A1220

R336

GND

Q123

12

C2690

GND

R341

3K9

Q122

BC846B

470

3K9

R342

BC856B

Q125

R337

470

12

2.AMP VM1.0

+14.5V

INPUT

C569

100n

17-01001-12

J500

RCA

R586

100R

GND

C558

100P

J502

XLR3F

5V

2

1

S500Source

3

DTC114EKA

R511

SEBAL

C531

10U

22K

R568

22K

R573

10U

C534

6K8

R500

A

D500

REDGREEN

K2

K1

Q501

e c

GND GND

2 3

47K

1 4

R516

220K

220K

R530

R587

4.7MEG

GND

R556

10K

R564

6K8

R575

6K8

T500

C500
100P

GND

C512
100P

Q503
2SA1015

47K

R569

47K

R574

b

GND

R504

Q505
2SC1815

GND

10K

RL500C

1 4

2 3

7 8

5V

GND

10R

R543

C525
220U/10V

SET

RESET

T501

GND

33K

R502

Q504
2SA1015

Q506
2SC1815

Q502
DTC114EKA

2
3

GND

6
5

R557

10K

RL500A

R522

100R

RL500B

D516

10K

1SS352

D502

10K

S

S352

1

D503

1K

1SS352

1

47K

R517

47K

R531

4

R506

100R

R536

100R

C501
220P

GND

C509
220P

5V

C521
1U

R546

2.2MEG

R558

2.2MEG

3R3
R572

C532

3R3
R582

GND

+17.5V

-17.5V

C524

10n

C529

10n

100U/25V

C551
100U/25V

1n8

8

4

R594

1K2

845R

R527

C570

U504C
MCP6002

3

C533
100nZ

C552
100nZ

2

3
2

R523

6
5

2
3

IN

IN

R520

ADJ

OUT
1

1

OUT

2K43

2K43

U506

ADJ

U500A
LME49720

U500B
LME49720

R547

680K

U504A
MCP6002

R559

680K

2

U505
LM317M

309R

3K24

C538
10U/25V

C547
10U/25V

3K24

316R

LM337M

3

1

7

8

4

U500C
LME49720

1

R576
R577

R580

R581

10K

R521

10K

R529

84

C516
100nZ

GND

C520
100nZ

U502C
TL072

C526

R552

10K

1U

GND GND

C539
100nZ

C548
100nZ

GND

C530

10U

+14.5V

C540
10U/25V

GND

C543

10U/25V

-14.5V

2
3

R507

12K
4K75

10K
10K

R534

4K75
12K

R538

C515
100nZ

C519
100nZ

5
6

U504B

R560

100k

R562

100k

R508

R514
R518

TL072
U502A

R553

330K

2

1

+14.5V

C514
100U/25V

GND

C517
100U/25V

-14.5V

MCP60

7

5V

5VS

R513

4K64

3

R524

500R

R525

1

R532

4K64

0

2

L502

BMB2A0600RS2

C544
10U/10V

C504
100N

392R

C506
100N

R550

5K6

GND

GND

10U/10V
C545

47K

R510

10K

R515

C503
10U/16V

GND GND

C505
10U/16V

R528

10K

U503A
OPA2134

1

VCL

+

7

VCL

-

C555

10U/25V

5V

C571

10U/10V

GND

R512

220K

C502
1U

6

TL072

5

TP2

R544
10K2

10K2
R548

U503B
OPA2134

VPPi

GNDC GND

VPNi

U502B
C508
1U

220K
R533
R535

47K

GND

3

m2 2 6.2 v

2

m2 7

6
5

GND

C541
10N

C549
10N

7

10U/10V
C556

bi as

6.

R545

4K7

10K2
R549

250V

250V

5 v

744302015

JP500

COPPER

744302015

2
3

5
6

BAR

R540

4K12

R542

5k

GND

L501

L503

4K75

R509

U501A
LME49720

U501B
LME49720

R537

4K75

R593

13K

D518

D519
4v7

1

7

R595
1K

4v7

470K

R526

84

OPA2134
U503C

C535

100U/100V

C546

100U/100V

10R

C567

1U/25V

8

NC

U501C
LME49720

4

NC

C568
1U/25V

10R

R541

10R

C557
100nZ

C523
100nZ

R551

10R

C559

100U/100V

C562

100U/100V

R588

GND

R519

R583

GND

R589

+14.5V

GND

-14.5V

C560

100U/100V

C563

100U/100V

R590

R503

R505

VCL+

+14.5V

-14.5V

VCL-

C518

47U/ 25V

C522
47U/ 25V

Q508

c

c

DTA114

GND

GND

VCLIP
AudioS

C561

100U/100V

C564

100U/100V

b

b

b

b

eec

eec

VDR-

VDR+

C553
10N

200v
C554
10N

200v

R565

NC

VPP

C542
330n/200V

C550
330n/200V

VPN

+14.5V

Over cur re nt in di cat i on

+14.5V

DTA114
Q500

INC

VPP

L504

GND

L505

GND

C510
10U/25V

GND

GND

-14.5V +14.5V

INH

D515
NC

R585

GND

10K

R539

0R

+17.5V-17.5V

IIC add
SCL
SDA
GPO0

R570
0R
0R
R571

VPP VPP
GND
GND

VPN

GND GND
VPN VPN
VDR
OUTC
OUTC OUTC

FBH OUTH
OUTH
OUTH
VSN VSP
GND
INH
OPT nAMPON
CLIP SCPIND
SDA/RDY SCL/nFAL

GNDC

VPPi

VPNi

VDR-

VDR+

L507
L506

0R
0R

P500

AMP MODULE

P502

R561
R563

TO

1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36

35 36
33 34
31 32
29 30
27 28
25 26
23 24
21 22
19 20
17 18
15 16
13 14
11 12
9 10
7 8
5 6
3 4
1 2

Mother board

GND
GND

NC
OUTC

OUTCFBC
OUTH

OUTH
NC

I

NC

GPO1
GPI

GND

VPP

VPN

GNDC

VPPi

VPNi
GNDC

5VS

R566

NC
NC

R567

OUTC

OUTH

GND

C513

10U/25V

XM500
HOLE

XM502
HOLE

XM533
HOLE

22-01626-00

D504
1SS352
D505
1SS352

R554

100R

C527
22N

D508

1SS352
D509

1SS352

R578

100R

C536
22N

D501
1SS352

D513

1SS352

R501

100R

C565

22N

GND

GND

GND

GND

XM501
HOLE

XM503
HOLE

XM534
HOLE

C507
10N 200V
C511
10N 200V

100R

100R

100R

1

1

D506
1SS352

D507

1SS352

R555

C528

22N

D510
1SS352
D511

1SS352

R579

C537
22N

D512
1SS352
D514
1SS352

R584

C566
22N

CN501

SP-

CN502

SP+

GND

GND

GND

13

3.NC400 OEM VM1.0(1/4)

CLIP

D29

BAS316

R1

4R7

SDA/READY

A1/OPTION

GND

OUTH
FBH
FBC

C3

OUTC

4n7

GND

J3

35 36
33 34
31
29 30
27 28

-Vop

VDR_EXT

-VB -VB

+VB

25 26
23 24
21 22
19 20
17 18
15
13
11 12
9 10
7
5
3 4
1 2

CON_2x18MH

32

16
14

8
6

SCL/nFATAL
SCCPIND
A0/nAMPON

-BNI+BNI

IOUT

+Vop

OUTH

OUTC

+VB

GND

GND

VDR_EXT

-VB

+VB

C1
100n
C2
100n
C4
100n

Mechanical

PCB

Bare

Mechanical

Assembly

Mechanical

SILPAD_TO220

Mechanical

SILPAD_TO220

Mechanical

Screw

Screw

M3

M3

M3

insulator

Mechanical

insulator

Mechanical

Mechanical

Mechanical

M3

M3

Mechanical

TO126

Mechanical

M3

Mechanical

M3

Mechanical

M3

Spacer

Mechanical

Spacer

Mechanical

Spacer ALU

Mechanical

Spacer

Mechanical

Spacer

3.5x6x7.3mm ALU Hansong

ALU

ALU 3.5

ALU 3.5

Mechanical

SAA6L8W0H2T1

Hsink

3.5

3.5

Spacer

Mechanical

Spacer

Mechanical

Spacer

3.5x6.3x5mm ALU Hansong

ALU

ALU

Spacer

Spacer

3.5x6x4.5mm ALU Hansong

Mechanical

ALU 3.5

Mechanical

Hsink

SGG8L6W2H0T1

INB+
INB-

FBH
FBC

Modulator

INH
INC

FBH
FBC

FBLH
FBLC

ENABLE
CLIPPOS
CLIPNEG

Control

PSRR+

PSRR-

CTRLH

CTRLC

Power Stage

+ISENSE+
+ISENSE-

-ISENSE+

-ISENSE-

CTRLH
CTRLL
SCCP
VSW

Mechanical

M3

Mechanical

M3

Mechanical

M3

OUTH

OUTC

GND

FBLH

FBLC

LSENSE+

LSENSE-

OUTH
OUTC

Mechanical

M3

Mechanical

M3

Mechanical

M3x16

Mechanical

M3x16

Mechanical

M3x16

Mechanical

M3

Mechanical

M3

Mechanical

M3

Mechanical

M3x16

Mechanical

M3x16

Mechanical

M3x16

Mechanical

M3x16

Mechanical

M3x16

Mechanical

M3x16

Mechanical

M3x16

Mechanical

M3x16

A1/OPTION

A0/nAMPON
SCL/nFATAL
SDA/READY
SCCPIND

VDR_EXT

CLIP

IOUT

ENABLE
CLIPPOS
CLIPNEG
A1/OPTION
A0/nAMPON
SCL/nFATAL
SDA/READY
SCCPIND
VDR_EXT
CLIPIND

IOUT

NC400OEM

V0.1

Sheet 4 -

-

+HVPS

+ISENSE

-ISENSE

-HVPS

SCCP

VOUT

VSW

LSENSE+

LSENSE-

uP.SchDoc

GND

GND

J1

1

Mounting

J4

1

Mounting

Hole

Hole

GND

GND

J2

1

Mounting

J5

1

Mounting

Hole

Hole

1

3.NC400 OEM VM1.0(2/4)

CTRLH

CTRLL

SCCP

R38

1k

12

MMBT5401

T12

GND

D9
BAW56W

3

D10

5V6

R40
2k2

T7

BC856BW

T13
BC846BW

R39
1k

R34

1k

VDR

R29
10k

D14
5V6

+VB

R24

2R2

C15
22u

GND

T5

BF622

T10

BC846BW

C34
470n

-VB

R7
1R

C16
100n

GND

L4

600R/0.2A

GND

C33
100n

R41
1R

L1

1u/8A

D1

1 2

3

BAV99W

D7

1

3

BAV99W

C31
470n

GND

C35
22u

C76
100n

R144
1R

C5
100n

R2
1R

C6
100n

R3
1R

C7
100n

R4
1R

C8
100n

R5
1R

+PS

C10
R8
33k

D2

12

R10
10k

D6
15V

R11
470R

12

D4
BAV70W

3

C21

C22

220u

470n

T1T6:fmmt618;T4T11fmmt718

2

R30
10k

C32
470n

L6

1u/8A

R31
470R

12

D12
BAV70W

3

BAV99W

3

D8

12

BAV99W

3

C17

15p

T3A
MBT3906

C28

18p

T9A
MBT3906

R17
1k

R37
1k

D3

BAS316

D11

BAS316

R12

220R

T4
BC807W

T3B
MBT3906

R32

220R

T9B
MBT3906

GND

T6 BC817W

BC807W

T11

T1
BC817W

C19

470n

D5

2V4

R22

6R8

0.5W

C30

470n

D13

2V4

100u

GND

R13

2R2
FDP42AN15

R16
100k

C24

330p

R33

2R2
FDP42AN15

R36
100k

GND

C36
100u

C41
100n

R43
1R

R9

2.5m

C18

150p

T2

R15

12R

GND

R25

1M

C29

150p

T8

R35

12R

T2,T8:FDP52N20

R42

2.5m

-PS

C11
100u

GND

GND

C12
100u

GND

C18 L2 R15:NC

L2
33n

VDR

GND

R18

L3

33k

10u

C23
4n7

R23

GND

VSW

L5
33n

GND

4R7

GND

C29 L5 R35 :NC

GND

GND

C37
100u

C42
100n

R44
1R

C38
100u

C43
100n

R45
1R

GND

C39
100u

C44
100n

R46
1R

C13
100u

R14
10R

C20
100p

TUOWSV

GND

GND

C40
100u

C45
100n

R47
1R

C9
100n

R6
1R

C14
100u

R19
1R

C25
680n

R26
1R

+ISENSE+

+ISENSE-

-ISENSE+

-ISENSE-

LSENSE+

LSENSE-

R20
1R

C26
680n

R27
1R

GND

GND

J8

1

Mounting

R21
1R

C27
680n

R28
1R

J9

1

Mounting

FBLH

OUTH

OUTC

FBLC

Hole

Hole

1

GNDGNDGNDGNDGND

3.NC400 OEM VM1.0(3/4)

FBH

INC

INH

FBC

R57
1k2

R74
1k2

R64
47R

C50
2n2

R58
1k2

R75
1k2

R52
10k

R84
10k

R65
1k8

C47
1n8

C52
1n8

+Vop

R48
220R

GND

R49

820R

R60
1k5

R63
1k5

R72
1k5

R77
1k5

J10
Jumper

R86
820R

R50
3k

R56
2k7

R80
2k7

R85
3k

C46
560p

C54
560p

GND

PSRR+

R61
360k

R78
360k

PSRR-

R62
360k

R79
360k

R53
6k8

T20B
BCM856S

-Vop

R54
6k8

T20A
BCM856S

T15B
BCM856S

T16A
BC856S

FBLH

C48

R59
47k

+Vop

84

V+

3

2

V-

-Vop

R76
47k

1n8

U1A
NE5532

1

C53
1n8

FBLC

T14B
BC856S

R55
1k

T15A
BCM856S

T16B
BC856S

MMST5401

+Vop

D16
3V3

D18
3V3

T24
BCV62B

D15
BAS316

T26
BC846BW

T28
BC856BW

D19
BAS316

T30
BCV61B

R98
10k

R99

100R

R101
10k

R96
10k

R102
10k

GND

C67
1n

C75
1n

R97
22k

R100
22k

ENABLE

R91
4k7

R103
1k

T25
BC856BW

CLIPPOS

CLIPNEG

T29
BC846BW

R128
1k

BC856BW

T23

GND

GND

GND

R71
47k

T14A
BC856S

R51
100k

GND

C51
100n

-VB

R87
1k

R66
47k

R83
560R

R88
1k

R67
2k7

R73

560R

T19A
BC846S

R95
4k7

R68
2k7

T19B
BC846S

R89
560R

T22
BC846BW

T17B
BC856S

R81

270R

VDR

R69
560R

R82

270R

T17A
BC856S

T21
BC846BW

R93
47R

T18A
BC846S

R94
82R

R92

200R

T18B
BC846S

R70
10k

R90
120R

C49
100n

CTRLH

CTRLC

-Vop

1

3.NC400 OEM VM1.0(4/4)

R

G

OSC2/C

OU

V

R

C

OSC

R

C

V

A

C

OU

B

C

S

RC7/

O

+HVPS

+ISENSE

R112
82R

R111
390R

D21
12V

R114
10k

R125
10k

R126
10k

R129
10k

D23
12V

R113
150k

R131
150k

R111 NC

C59
10n

D22

BAS316

GND

D24
BAS316

T32
BCV62B

T33
MMBT5401

T35
MMBT5551

SCCPIND

GND

SCCP
CLIPPOS
CLIPNEG

-VB

C60
2u2

T34
BC846BW

R115
1k

R130
390k

R110
2k2

D20
3V9

R116
27k

C61
2u2

R127
10k

GND

GND

R117
10k

C64
10n

C62
2u2

+Vop

R118
10k

R106
330R

R109
330R

T31
BC846BW

R119

R151

8k2

12k

J11

1
2
3
4

placed

5

Not

CON_1x5MV

R120
2k2

GND

SCL/nFATAL

GND

SDA/READY

Reset

T36

C63
2u2

NC

LSENSE+

LSENSE-

U2

20

Vss

Vss

19

RA0/AN0/C1IN+/ICSPDAT/ULPWU

RA0/AN0/ C1IN+/I CSPDAT/ ULPWU

18

RA1/AN1/C12IN0-/VREF/ICSPCLK

RA1/AN1/ C12IN0-/ V REF/I CSPCLK

17

RA2/AN2/T0CKI/INT/C1OUT

RA2/AN2/T0 CKI/INT/ C1OUT

16

RC0/AN4/C2IN+

RC0/AN4/ C2IN+

15

RC1/AN5/C12IN-

RC1/AN5/ C12IN-

14

RC2/AN6/C12IN2-/P1D

RC2/AN6 /C12IN2- /P1D

13

RB4/AN10/SDI/SDA

RB4/AN10/SDI/SD A

12

RB5/AN11/RX/DT

RB5/AN11 /RX/DT

11

RB6/SCK/SCL

R105
2k4

R107
2k4

C55

10u

C57

10u

R104
10M

C56
1n5

5
6

U1B
NE5532

7

C58
1n5

R108
10M

KI/

RA5/T1CKI/OSC1/CLKIN

A5/T1

RA4/AN3/T1G/OSC2/CLKOUT

A4/AN3/T1

RC3/AN7/C12IN3-/P1C

RC3/AN7/C12IN3-/P1

1/CLKIN

/

RA3/MCLR/VPP

RC4/C2OUT/P1B

R

LK

LR/

A3/M

RC5/CCP1/P1A

RC5/CCP1/P1

4/C2

T/P1

RC6/AN8/SS

RC6/AN8/S

RC7/AN9/SDO

AN9/SD

RB7/TX/CK

RB7/TX/CKRB6/SCK/SCL

DD

VDD

PP

GND

IOUT

CLIPIND

T38
BC846BW

3VPIC

+VB

R133

R122

1

2

3

T

4

5

6

7

8

9

10

R121
1k

R140
10k

390k

C66
10n

1k8

R132
10k

R123
27k

C65
100p

R124
27k

A1/OPTION

A0/nAMPON
ENABLE

VDR_EXT

-ISENSE

-HVPS

D25
BAS316

VDR

GND

R135
82R

T39
BCP56

J12

1

Mounting

R146
47k

Hole

D26
BAS316

GND

-VB

R137
330R

R147
47k

C74
470n

T37

BCV61B

C68
10n

R137 NC

R148
68R

T40
BD139

R149
18k

R150
13k

T41
BC846BW

D27
5V6

VOUT

GND

VOUT

+Vop

+Vop

-Vop

R134
1M

R152
10k

C72
22u

C73
22u

R139
27k

D28
10V

R145
12k

C69
1u

R153
10k

T42
BC846BW

GND

R141
10k

GND

R142
1k2

R143
1k8

C70
100p

C71
100p

BC846BW

R136
4k7

3VPIC

PIC16F690

VSW

GND

R138
100k

-VB

17