NAD C356BEE User manual

NAD
SERVICE MANUAL
C 356BEE
STEREO
AMPLIFIER
C 356BEE STEREO AMPLIFIER

TABLE OF CONTENTS
DESCRIPTION P A G E
SERVICE CAUTION…………………………………………………………..3-4
REAR PANEL/FRONT PANEL VIEW……………………………………..5-6
SPECIFICATIONS…………………………………………………………7-8
WIRING DIAGRAM………………………………………………………………9
BLOCK DIAGRAM……………………………………………………. …...10-13
ALIGNMENT PROCEDURE........................................................14
SCHEMATICS……………………………………………………………....15-18
PCB LAYOUT……………………………………………………………….19-24
TROUBLE SHOOTING GUIDE…………………......................................25
ELECTRICAL PARTS LIST…………………………………………….26-36
EXPLODED VIEW……………………………………………………………..37
EXPLODED VIEW PARTS LIST……………………………………………....38

PRODUCT SAFETY SERVICING GUIDELINES
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 AC LINE SHOCK.
SAFETY CHECKS
AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN
CORRECTED. A CHECK SHOULD BE MADE OF THE
FOLLOWING.
SUBJECT : FIRE & SHOCK HAZARD
1. BE SURE THAT ALL COMPONENTS ARE POSITIONED 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 HAVE BEEN 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 AC
CORD). AND REPLACE IF NECESSARY FOLLOW ORIGINAL
LAYOUT, LEAD LENGTH AND DRESS.
5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVING
TUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEAD
TENSION AROUND PROTRUDING 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
AC 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 SAFET TO OPERATE WITHOUT DANGER OF ELECTRICAL
SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER
DURING THIS TEST USE AN AC 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, 150V AC TYPE
CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND
(WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED
METALLIC PARTS, ONE AT A TIME.
MEASURE THE AC VOLTAGE ACROSS THE COMBINATION
OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR.
REVERSE THE AC PLUG AND REPEAT AC VOLTAGE
MEASUREMENTS FOR EACH EXPOSED METALLIC PART.
VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S.
THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUE
EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.
SUBJECT : GRAPHIC SYMBOLS
SUBJECT : TIPS ON PROPER INSTALLATION
1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS,
CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER
OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED
AIR FLOW.
2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS:
OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A
FACTOR, NEAR STEAM RADIATORS WHERE STEAM
LEAKAGE IS A FACTOR, ETC.
3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT
REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE
USE OF DECORATIVE SCARVES OR OTHER COVERINGS
WHICH MIGHT OBSTRUCT VENTILATION.
4. WALL AND SHELF MOUNTED INSTALLATIONS USING A
COMMERCAL MOUNTING KIT MUST FOLLOW THE FACTORY
APPROVED MOUNTING INSTRUCTIONS A PRODUCT
MOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITS
ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN
SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS
THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS
MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM
LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS.
5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A
PRODUCT ON SLOPING SHELF OR A TILTED POSITION,
UNLESS THE PRODUCT IS PROPERLY SECURED.
6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE
ON ITS MOUNTING TO THE CART. CAUTION THE
CUSTOMER ON THE HAZARDS OF TRYING TO ROLL A CART
WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP
PILE CARPETS.
7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR
STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS
LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC
MODEL OF TELEVISION RECEIVER OR GENERICALLY
APPROVED FOR USE WITH T.V.’S OF THE SAME OR
LARGER SCREEN SIZE.
8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION
CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS
SPROUTING FROM A SINGLE OUTLET CAN LEAD TO
DISASTROUS CONSEQUENCES TO HOME AND FAMILY.
THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN
EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE
PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” WITHIN THE
PRODUCT’S ENCLOSURE 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 USER TO THE PRESENCE OF IMPORTANT
OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE
LITERATURE ACCOMPANYING THE APPLIANCE.
3

SERVICING PRECAUTIONS
CAUTION : Before servicing the A/V Receiver 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 A/V Receiver 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 substitution or incorrect polarity installation
of electrolytic capacitors may result in an explosion hazard.
2. Do not spray chemicals on or near this A/V Receiver 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 A/V Receiver 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 1M-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 handling 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 reasons 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. lmmediately 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.)
4

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8

CB21
(-55V)(-55V)(+55V)(+55V)
WHITEWHITE
REDRED
CB11
CZ13
CZ12
(GND)
CZ22
GND
(+55V)
RED
CB510 CB51
CB52
CB53
CB58
CB54
CB55
CB56
CB59 CB57
CB47
CB45
CZ45
(-55V)
WHITE
CZ11
CB12CB22
CZ76 CZ71
CZ75
P-GND
P-GND
CZ37
CB37
CZ61
CB33
CB32
CZ62
(-55VA)
(+55VA)
CB39 CB48
CB36
CB34
CB31
CB35
CB78
CZ78
CZ77
CZ79
WIRING DIAGRAM
UL1015#16AWG
TO AC INLET
UL1672#18AWG
TO MAIN TRANSFORMER
UL1672 AWG#18
AMP SMD BOARD
INSERT
UL1015#22AWG
UL3266#18AWG
UL1672#18AWG
UL1672#14AWG
UL1672#22AWG
POWER BOARD
TO AC OUTLET
(ONLY 120V VERSION)
TO POWER SWITCH
UL1672#18AWG
UL1672#18AWG
UL1007#26AWG
UL1672#18AWG
PHONE BOARD
AMP SMD BOARD
INSERT
UL2468#26AWG
KEY BOARD
MAIN BOARD
TONE+VOLUME BOARD
FPC-1.25-13P
UL2468#26AWG
PREAMP SMD BOARD
INSERT
INSERT
PREAMP SMD BOARD
UL2547#26AWG
TO MDC/PP375/DAC MODULE
FPC-1.25-12P
UL2547#24AWG
UL2854#26AWG
TO PC RS232 PORT
RS232 BOARD
9

MDC/PP375/DAC/DISC IN Rear/Front panel MP IN CD IN AUX IN TUNER IN TAPE1 IN TAPE2 IN
RELAYS SWITCH
INPUT SELECT CIRCUIT
MCU
STC12C5A08S2
RS232 INTERFACE
(MAX232D)
DB9 SOCKET
VOLUME CONTROL
(REMOTE)
RT33
PREAMP IN MODULE
RT31 RT32 RT34
RL311
BASS
TREBLE
BALANCE
TONE DEFEAT
(CONTROL BY MCU)
PREAMP OUT MODULE
REC1 REC2
PREAMP OUT 1/2
POWER AMP CIRCUIT L/R
POWER AMP MODULES L/R SOFTCLIPPING
CONTROL CIRCUIT
ISC CONTROL CIRCUIT PROTECT CIRCUIT
SPEAKERS OUT RELAYS FOR SPEAKERS OUT
HEADPHONE OUT
IR IN/OUT
12 TRIGGER OUT
POWER SUPPLY
(+/-55V,+/-26V,+/-18V,+12V,+5V)
INPUT SELECT KEYS
CONTROL CIRCUIT
+/-55V,+/-18V
+26V
+12V
+/-55V,+/-18V
+/-55V
+/-18V
+/-18V
+/-12V
+5V
+5V
+5V
+5V
BLOCK DIAGRAM
10

C79
27p
C710
27p
Y71
11.0592MHz
+5V
PHONE71
Ipod IN
2
3
1
IC72
IS1U60L IR RECEIVER
C1+
1
V+
2
C1-
3
C2+
4
C2-
5
V-
6
T2OUT
7
R2IN
8R2OUT 9
T2IN 10
T1IN 11
R1OUT 12
R1IN 13
T1OUT 14
GND 15
VCC 16
IC76
MAX232D
Red Blue
D717
3LED
Amber
P1.5/MOSI/ADC5
1
P1.6/MISO/ADC6
2
P1.7/SCLK/ADC7
3
P4.7/RST
4
P3.0/RXD
5
P4.3/CCP1/TXD2/SCLK
6
P3.1/TXD
7
P3.2/INT0
8
P3.3/INT1
9
P3.4/T0/CLKOUT0
10
P3.5/T1/CLKOUT1
11
P3.6/WR
12
P3.7/RD
13
XTAL2
14
XTAL1
15
GND
16
P4.0/SS
17
P2.0/A8
18
P2.1/A9
19
P2.2/A10
20
P2.3/A11
21
P2.4/A12
22
P2.5/A13 23
P2.6/A14 24
P2.7/A15 25
P4.4/NA 26
P4.5/ALE 27
P4.1/ECI/MOSI 28
P4.6/RST2/EX_LVD 29
P0.7/AD7 30
P0.6/AD6 31
P0.5/AD5 32
P0.4/AD4 33
P0.3/AD3 34 P0.2/AD2 35 P0.1/AD1 36 P0.0/AD0 37
VCC 38
P4.2/CCP0/RXD2/MISO 39
P1.0/ADC0/CLKOUT2 40
P1.1/ADC1 41 P1.2/RXD2 42 P1.3/TXD2 43 P1.4/ADC4 44
IC73
STC12C5A08S2-35I-LQFP44
RXD
TXD
1
2
3
4
5
6
7
8
9
11
10
CZ77
DB 9
To pre mute circuit
Volume control
circuit
Module Detect
Reset circuit
+5V
Power LED
control circuit
Blue LED control
Red LED control
Input select control circuit
Input control
Front panel MP detect
keys circuit
SPK A/B control circuit
Tune defeat on/off control circuit
Standby control circuit
To MDC TXD
To MDC RXD
Protection detect
MICROPROCESSOR CONNECTION DIAGRAM
11

STC12C5A08S2
KEY BOARD IC73
PORT 2 DRIVERS
PORT 2
LATCH
P2.0 - P2.7
FLASH
PORT 0
LATCH
RAM
PROGRAM
ADDRESS
REGISTER
BUFFER
PC
INCREMENTER
PROGRAM
COUNTER
DUAL DPTR
INSTRUCTION
REGISTER
B
REGISTER
INTERRUPT, SERIAL PORT,
AND TIMER BLOCKS
STACK
POINTER
ACC
TMP2 TMP1
ALU
PSW
TIMING
AND
CONTROL
PORT 1 DRIVERS
P1.0 - P1.7
PORT 3
LATCH
PORT 3 DRIVERS
P3.0 - P3.7
OSC
GND
VCC
PSEN
ALE/PROG
EA / VPP
RST
RAM ADDR.
REGISTER
PORT 0 DRIVERS
P0.0 - P0.7
PORT 1
LATCH
WATCH
DOG ISP
PORT PROGRAM
LOGIC
12

1
2
3
4
5
6
7
98
01
11
21
31
41
51
61+1C
+V
-1C
+2C
-2C
-V
TUO2T
TUO2RNI2R
NI2T
NI1T
TUO1R
TUO1T
NI1R
DNG
CCV
MAX232D
67CI:DRAOBYEK
smhoK5
smhoK5
smhoK004
smhoK004
Fu1.0
Fu1.0 fu1.0
Fu1.0
Fu01
TUPNIV5+
CCV
NI1T
NI2T
TUO1R
TUO2R NI2R
NI1R
TUO1T
TUO2T
2T
1T
1R
2R
51DNG
1
2
3
4
5
6
7
89
01
11
21 31
41
61
-V
+V
+1C
-1C
-2C
+2C
V01+otV5+
relbuoDegatloV
retrevnIegatloV
V01-otV01+
13

lowest level.
VR304
C356BEE TUNE +VOLUME BOARD
VR303
VR12
VR13
TP4
TP3
Repeat procedure A,B and C for the lowest volume level, idling current alignment
5. Adjusting VR302,make R channel output become to the lowest level by same way.
Adjust the pot VR3 to make the DC voltage of the point of TP10 to the same as TP11
C356BEE MAIN BOARD
4. Connect a DC voltmeter toTP3 and TP4 ,adjust VR12/VR13 for 6mV reading on voltmeter.
3. Connect a DC voltmeter toTP1 and TP2 ,adjust VR22/VR23 for 6mV reading on voltmeter.
TP2
TP1 VR23
VR22
VR301 VR302
TP11
VR3
TP10
and ISC original level respectively.
B. IDLING CURRENT
C.ISC CIRCUIT ORIGINAL ADJUSTING
II. FINAL ADJUSTMENT
1. Power on
2. Running 5 minutes with no signal
3. Connect a oscilloscope to L channel binding posts.
2. Input a high voltage signal such as 5V from CD input.
4. Observing the oscilloscope,adjust VR301,make the output of speakers become to the
1. Tune the volume pot to lowest state.
ALIGNMENT PROCEDURES
A. LOWEST VOLUME ADJUSTMENT
I. INITIAL
14

(For 120VAC Version)
AC POWER CORD
SW52
POWER SWITCH
1
2
3
CZ55
!
1
2
3
CZ56
CON3
RED
GRY
BLK
ORG
VIO
!
1
2
3
4
5
6
7
CZ51
CON7
1
2
3
CZ57
CON3
1
2
3
CZ59
CON3
1
1
2
2
AC outlet
!
!
!
1
2
3
4
5
6
7
8
9
10
11
C356 MAIN TRANS.
NAD C356BEE POWER CIR.
C51
10n/250V
D51
KBU8D
C52
10n/250V
D55
KBU8D
C517
22000uF/63V 10%
C518
22000uF/63V 10%
D531
BT151-500R
D532
BT151-500R
R558
1K
R563
22K
R561
100
R562
1K
R560
1K
R559
1K
R565
100
R564
22K
R531
0.05/5W 5% CE
R532
220
R534
2K2
R533
1M
R566
4K7
R544
22K
C523
2200u/63V
C524
2200u/63V
!!
12
F51
+55V
-55V
-55VA
+55VA
I-V
AC DET.
TRIG
10% 10%
2.5A/250V for 230V mains
1
2
3
4
5
6
7
CB51
CON7
8V
0V
1
2
3
4
5
6
7
8
9
10
CB53
D56
DB104
41V
41V
0V
32V
32V
WHITE
RED
Q519
A1015
Q520
C1815
Q59
A1015
Q510
A1015
Q517
A1015
Q518
C1815
1
2
CB54
R567
330K
+55VA
-55VA
1
2
CB52
1
2
3
CB55
CON3
1
2
3
CB56
CON3
1
2
3
CB57
CON3
-55V
+55V
C53
4.7nF/400V
C54
0.33uF
1
2
CB58
RED
WHITE
1
2
3
CB59
CON3
C527
3300uF/25V
D513
1N4004
D510
DB105
RL51
D533
1N4148
C539
4N7/400V
R582
1K
Q522
C1815
R575 1K
C544
10nF
32V 1 32V 2 41V 2 41V 1
41V 1
41V 2
32V 1
32V 2
R580
4K7 R581
10K
R579
1K
B
b
E
ECC
Q501
C1815
+5V
5A/250V for 120V mains
+5V
MDC GND
D52
DB104
9V
0V
Standby
PGND
C531
10uF/400V
UV
1
BP
2
D
4S5
S6
S7
S8
IC51
TNY274
D58
FR107/UF4006
D59
SR540
C557
0.1uF
C533
330uF/10V
IC53 PC817 C530
0.1uF/16V
R570 100
R571
1K
C545
330uF/10V
C546 2.2nF/250V,Y1
6
10
2
4
5
1
9
7
T51
EE16 2
R574 N.I. D535
N.I.
C556
N.I.
R583
N.I.
PGND
L52
10uH
C536
0.1uF
PGND
C551
100uF/16V
C552
3300uF/25V
C550
0.1uF
+5.6V
IN IC55
LM317M
R577
910,MF
R578
255,MF
C555
10uF/16V
D541
1N5819
+8.8V MDC
D57
4V3
L51
FILTER INDUCTOR,2x1.8mH
D536
P6KE200A
+5V
R584 1/0.5W
D537
DB104
1
2
CB510
CON2
1
2
CZ510
CON2
Blue
Blue
Yellow
Yellow
SCHEMATICS DIAGRAM(1/4)
POWER SUPPLY CIRCUIT Vm1.0
PCB-2:POWER BOARD Vm1.0
15

C66
0.1u 20%
R620
10
1
2
3
4
5
6
7
8
9
CZ61
CON9
GND
+18V
-18V
LOUT
ROUT
RIN-
RIN+
LIN+
LIN-
C62
220p
R62
220
R64
2.2M
Q62
2SK209 GR
R68
1K
R610
430 2%
Q65 A1312-GR
Q68
2SC2881-Y
C64
22p
R612
1K
Q66
2SA1201-Y
R614
10K
R616
10
C67
0.1u 20%
C68
0.1u 20%
C610
100p
R617
10
Q69
C3324-GR
Q611
C3324-GR
R622
1K
R624
620
C612
1nF
R619
10
C61
220p
R61
220
R63
2.2M
Q61
2SK209 GR
R67
1K
R69
430 2%
Q63
A1312-GR
Q67
2SC2881-Y
C63
22p
R611
1K
Q64
2SA1201-Y
R613
10K
R615
10
C65
0.1u 20%
C69
100p
R618
10
Q610
C3324-GR
Q612
C3324-GR
R623
1K
R625
620
C613
1nF
RCA31A
DISC
RCA31C
CD
RCA31E
MP
RCA32A
AUX
RCA32C
TUNER
RCA32E
TAPE2
RCA33E
REC1
RCA33C
TAPE1
RCA33A
REC2
C317
100p
C319
0.1u 10%
C324
47u/50
C323
47u/50
RCA34A
Pre-out 1 L
RL31B
RL32B
RL33B
RL34B
RL35B
RL36B
RL37B
RL38B
RCA31B
DISC
RCA31D
CD
RCA31F
MP
RCA32B
AUX
RCA32D
TUNER
RCA32F
TAPE2
RCA33F
REC1
RCA33D
TAPE1
RCA33B
REC2
RL31A
RL32A
RL33A
RL34A
RL35A
RL36A
RL37A
RL38A
R333
4.7K
R335
68
C341
47u/25
C320
0.1u 10%
RCA34B
Pre-out 1 R
R334
4.7K
R336
68
C342
47u/25
RL31C RL32C RL33C RL34C RL35C RL36C RL37C RL38C
D37
1N4148
D38
1N4148
D39
1N4148
D310
1N4148
D311
1N4148
D312
1N4148
D313
1N4148
R348
100K
R347
100K
R346
22K
R345
22K
1
2
3
4
5
6
7
8
9
CB34
1
2
3
4
5
6
7
8
9
CB32
IN MODULE
1
2
3
4
5
6
7
8
9
CB33
OUT MODULE
MF
MF
TO CZ71
L-CH INPUTS
R-CH INPUTS
Soft Cliping
Protection
+12V
IR IN
IR OUT
DISC CD MP AUX TUNER TAPE2 TAPE1
+12V
-18V
+18V
+5V
Soft Cliping
Protection
-18V
+18V
+18V
-18V
+5V
+18V
-18V
C345
0.1uF
C346
0.1uF
Standby
Standby
+5V
+12V
PHONE1A
IR OUT
PHONE1B
IR IN
PHONE2
+12V Trigger
R2
10
C3 0.1uF
R393 10K
Q301
2SC1815
R394
1K
Q302
2SA1015
R395
33
+5V
+5V
R389 10K
R396
4.7K
C362
10n
R397 10K
VR302
100
R386
1.8
R384
560 1%
VR301
100
R385
1.8
R383
560 1%
C356BEE RELAY CONTROL CIR.
+12V+12V
R391
560 1%
R392
560 1%
12V TRIG
MP
1
2
3
CB35
CON3
RL39B
RL39A
MP
R390
330
C363
100pF
C364
100pF
RCA34C
Pre-out 2 L
RCA34D
Pre-out 2 R
R365 30K
C365 56pF
Speak B
Speak A
RL310B
RL310A
R398
100
R399
100
RL310C
D317
1N4148
R366 30K
C366 56pF
MP
AUX
TAPE2
TUNER
DISC
TAPE1
CD
Mute
MDC
Mute
C131
47uF/50V
C231
47uF/50V
+26V+26V
-26V-26V
MODULE IN L
MODULE IN R
MODULE SEL
1
2
3
4
5
6
7
8
9
10
11
12
CB36
TO EXTRA MODULE
+26V
+5V
TO MDC TXD
MODULE IN R
TO MDC RXD
-26V
MODULE IN L
MODULE DET
MODULE SEL
EXTRA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
CB31
TO CZ76
MODULE DET
TONE DEF
RL39C
D316
1N4148
MP REAR
REAR PANEL
MP REAR
1
2
3
4
5
6
7
8
9
10
11
12
13
CB37
CON12
+5V
TONE DEF
1
2
CB38
TO EXTRA MODULE
+15V MDC
+15V MDC GND
VOL V-
VOL V+
VOL V+
VOL V-
R31
470
R33
470
R35
470
C31
100p
C33
100p
C35
100p
R37
470
R39
470
R311
470
C37
100p
C39
100p
C311
100p
R313
470
R315
470
R317
470
C313
100p
C315
100p
R32
470
R34
470
R36
470
C32
100p
C34
100p
C36
100p
R38
470
R310
470
R312
470
C38
100p
C310
100p
C312
100p
R314
470
R316
470
R318
470
C314
100p
C316
100p
C318
100p
R341
1M
R342
1M
R343
1M
R339
1M
R338
1M
R337
1M
R349
1M
R351
1M
R353
1M
R355
1M
R357
1M
R350
1M
R352
1M
R354
1M
R356
1M
R358
1M
1
2
3
4
CB39
TO RS232 CZ79
C367
4.7u/25
C325
47u/25
R321
3K3 MF
R323
750 MF
R319 N.I.
R325
390 MF
R327
180 MF
C327
22n 5%
C329
0.1u 5%
R329
1K5 MF
R331
390 MF
C331 0.22uC333
1u,63V,5%
C335
N.I.
C339
1u/16
TONE DEFEAT
C326
47u/25
R322
3K3 MF
R324
750 MF
R320 N.I.
R326
390 MF
R328
180 MF
C328
22n 5%
C330
0.1u 5%
R330
1K5 MF
R332
390 MF
C332
0.22u 5%
C334 1u,63V,5%
C336
N.I.
C340
1u/16
TONE DEFEAT
BY MOTOR
BY MOTOR
VOLUME POT
VOLUME POT
BALANCE POT
BALANCE POT
BASS POT
BASS POT
TREBLE POTTREBLE POT
63V
63V
63V
63V
5%,63V
C337
0.1U
C338
0.1u
C321
0.1U
C322
0.1U
C350 N.I.
R388 20k
C349 N.I.
R387 20K
RT31A
10KA
RT31B
10KA
RT32B
10KA
RT32A 10KA
RT34A 20K MN
RT34B 20K MN
R361
N.I.
R362
N.I.
R363
51K
R364
51K
B1 7
A1
5
W1 6 C1
8
RT33A 20KB
B2 3
A2
1
W2 2 C2
4
RT33B
20KB
VR304
10K
VR303
10K
OFF
ON
1
3
2
RL311A
4
6
5
RL311B
+5V
RL311C
D319
1N4148
ON
OFF
TONE D
1
2
3
4
5
6
7
8
9
10
11
12
13
CZ37
CON12
R407
1K
R402
10K
R404
10K
R403
1K
R405
1K
R406
1K
C417
4u7/25V
C418
4u7/25V
DGND DGND
VOLUME CONROL
C303
220p
C302
220p
C301
10uF/50V
DGND
Q402
C1815
Q404
C1815
Q401
A1015
Q403
A1015
- +
M
RT33C
20KB
VOL V-
VOL V+
VOL V-
VOL V+
+5V
FRONT R
FRONT L
D320
1N5819
D321
1N5819
SCHEMATICS DIAGRAM(2/4)
PREAMP CIRCUIT Vm1.0
PCB-1:MAIN BOARD Vm2.0
Preamp AMP Module Vm1.0
PCB-9: Preamp AMP Module Vm2.0
Tone and Volume Circuit Vm1.0 PCB-4:Tone and Volume board Vm2.0
16

+55VA
Over Heat Protection:
It shut down the unit
when the temperature on
the heatsink is over 90C
degree
It alos shut down the unit
when the unit enter the
standby mode
ISC Circuit:
It switch the power
supply to lower voltage
when the load
impedance is low, or the
temperature on the
heatsink is over 80C
degree
C219
22n 10% 63V
RCA34F
MAIN-IN R-CH
R156
470K
R11
470
C11
10u/16V
R15
22K
R14
100
C15
220uF/63V
C16
220uF/63V
Q110
KSA1220
Q111
KSC2690
R124
3.3/0.5W FP
R125
3.3/0.5W
R128
330/0.5W FP
R129
330/0.5W
C110
47u/25V
C111
47u/25V
R126
3K3/2W FP
R127
3K3/2W FP
R130
82/1W FS
R131
82/1W FS
R142
22,MF,5%
R143
22,MF,5%
R136
10
R137
10
Q112
2SC5171
Q115
2SC5949
Q114
2SA2121
Q113
2SA1930
R144
0.068/3W CE
R145
0.068/3W CE
R139
412
L11
0.5uH
R150
1/1W FP
R151
10/1W FS
C118
0.1u 10% 63V
C115 0.1u
C114
0.1u
R21
470
R12
220K
R22
220K
C112
470p,100V,20%
C113
470p,100V,20%
R147
1K
Q11
C1815
Q12/1
A1015
R152
22K
R12/1
6K8
R148
56K
C120
22n 10%
D17
1N4148
RCA34E
MAIN-IN L-CH
R146
1K8,1W,1%,MF
Q116
KSC2690
R138
430
Q47
A1015
Q45
A1015
Q46
C1815
R417
100
R419
100
R418
100
R416
100
C415
10u/25V
C416
10u/25V
R422
1.3K
R423
1.3K
R424
1.3K
R425
1.3K
R420
36K
R421
36K
D411
20V
D410
20V
TP4
TP3
FS
FS
POWER AMP CIR. R
+55V
-55V
+55V
-55V
D11
4.7V
D12
4.7V
R108
39,MF,5%
R107
39,MF,5%
Q48
C1815
C17
0.1uF/63V
C12/1
10uF/25V
VR12
200
C119
22n 10% 63V
C21
10u/16V
R25
22K
R24
100
C25
220uF/63V
C26
220uF/63V
Q210
KSA1220
Q211
KSC2690
R224
3.3/0.5W FP
R225
3.3/0.5W
R228
330/0.5W FP
R229
330/0.5W
C210
47u/25V
C211
47u/25V
R226
3K3/2W
R227
3K3/2W
R230
82/1W FS
R231
82/1W FS
R242
22,MF,5%
R243
22,MF,5%
R236
10
R237
10
Q212
2SC5171
Q215
2SC5949-O
Q214
2SA2121-O
Q213
2SA1930
R244
0.068/3W CE
R245
0.068/3W CE
R239
412
L21
0.5uH
R250
1/1W FP
R251
10/1W FS C218
0.1u 10% 63v
C215 0.1u
C214
0.1u 10% 63V
TP1
C212
470p,100V,20%
C213
470p,100V,20%
R247
1K
R248
56K
R252
22K
Q21
C1815
C220
22n 10%
D27
1N4148
R246
1K8,1W,1%,MF
Q216
KSC2690
R238
430
TP2
FP
FS
FS
63V
+55V
-55V
D21
4.7V
D22
4.7V
R207
39,MF,5%
R208
39,MF,5%
C27
0.1uF/63V
R256
470K
R257
470K
C222
1uF,63V,5%
C221
1uF,63V,5%
R258
2.2k
-18V
+18V
VR22
200
POWER AMP CIR. L
L OUT
R OUT
D412
1N4148
BINDING POSTS
R446
56K
R445
56K
R441
5.6K,1/2W
PROTECTION CIR.
+26V
R478
100K
1
2
3
IC43A
TL082D
R480
4K3
R482
4K7
R479
100K
C428
10u/25V
C425
10u/25V
R470
10K
R471
10K
D418
1N4148
D417
1N4148
R477
47K
R483
270K
R473
51K
R472
470K
C426
10u/25V
C429
10u/25V
R488
18K
R487
18K
D420
1N4148
D419
1N4148
R474 1K
C430
10u/25V
R476
1K
C431
10u/25V
R490
100K
R491
100K
4
5
6
7
8
IC43B
TL082D
+18V
-18V
1
2
3
4
5
6
7
8
9
10
CB47
10PIN
1
2
3
CB45
R453
220/2W FP
R452
220/2W FP
R438
18K
R439
T0=90 degree C
Q412
C1815
POSISTOR
+18V
1 2
3 4
5 6
RL12/1
JQX-115F/024-2HS4AF
1
2
3
4
SPK A
R440
2K2
+18V
ISC CIRCUIT
+12V
Protection
Soft Cliping
+5V
+18V
-18V+5V
+18V
-18V
+12V
Standby
STANDBY
I-V
AC DET.
ISC TRIG
Q421
C1815
R469
10K
R468
22K
R467
T0=80 degree C
D428
1N4148
+18V
SOFT CLIPING CIR.
7
6
5
48
IC42B
TL082D
-55V+55V
P3-RP4-R
P5-GND
R493
180k
VR3
10K
+18V
R133
3K3/2W
R132
3K3/2W FP
R232
3K3/2W FP
R233
3K3/2W FP
R260
1K,5%
R261
1K,5%
-55V+55V
P1-LP2-L
R157
470K
C122
1uF,63V,5%
C121
1uF
R158
2.2k
-18V
+18V
1
2
3
48
IC41A
TL082D
R160
1K,5%
R161
1K,5%
1
2
3
4
5
6
7
8
9
10
11
12
CB11
CON8
1
2
3
4
5
6
7
8
9
10
11
12
CB21
CON8
+18V
+18V
-18V
-18V
D101
1N4148
D102
1N4148
D103
1N4148
C123 0.1uF
R162
1K
R163
1K
R164
10K/1W
R165
10K/1W
R167
1K
R166
5K6
R168
1K
D201
1N4148
D202
1N4148
D203
1N4148
C223 0.1uF
R262
1K
R263
1K
R264
10K/1W
R265
10K/1W
R267
1K
R266 5K6
R268
1K
Q217
2SA970
Q117
2SA970
Q118
2SC2240
Q218
2SC2240
IC11
AZ431
IC21
AZ431
R134
1M2
R234
1M2
C227
N.I.
C127
N.I.
TP10
TP11
R12/2
22K
C422
330u/16V
C421
0.47uF/50V
C432
0.22u
C420
100u/16V
1 2 3 4 5 6 7 8
IC44
Protection Module
R434
10K
R432
10K
R430
100
R433
100
Q424
C1815 Q425
C1815
R442
10k
R431
10k
Speak B
Speak A
1
2
3
4
SPK B
1 2
3 4
5 6
RL12/2
JQX-115F/024-2HS4AF
D413
1N4148
+26V
R OUT
L OUT
Q219
2SC2690
R270
2.2K
R170
2.2K
Q119
2SC2690
R498
1,1/4W
R499
1,1/4W
+5V
VR13
2K
R171
820
VR23
2K
R271
820
D429
1N4148
D430
1N4148
C228 10uF C128 10uF
C129
6.8pF
R408
56k
R409
56k
SUPPLY CIR.
-55VA
+55VA
R45
3.3/0.5 FS
R41
680
R47
680 C43
220u/63V
C413
220u/35V
Q41
2SC2690
C45
22p
R49
680
R411
680
R413
680
C47
47u/50V
C49 10u/50V
R414
6.8K
R46
51 / 1W FS
R42
680
R44
680
R48
680
C44
220u/63V
C414
220u/35V
Q43
C1815
C46
22p
R410
680
C48
10u/50V
C410 10u/50V
R412
6.8K
Q42
2SA1220
Q44
A1015
C411
0.1uF
C412 0.1u
R428
2K2
R429
6K8
+26V
-26V
R401
10K
C443
0.1uF
R427
100/1W FP
Q413
KSC2690
Q414
C1815
+12V
C419
10uF/25V
Q422
C2690
Q423
C2240
R494
12
12V TRIG
C446
10uF
R495
510
R497 10K,1%
R496
100K,1%
C447
10uF/50V
IC301
AZ431
D110
3.3V/1W
R484
1M,1%
R485
110K
R43
680
IN
IC401
LM317M
R492
6.2K
R486
470
C41
10u/25V
R435
470
C42
10u/25V
-18V
+18V
C449 10u/50V
C448
0.1uF
C445 10u/50V
C444
0.1uF
R415
6.2K
IC402
LM337M
+55VA
-55VA
Standby
+26V
-26V
+26V
-26V
1
2
CB48
To MDC MODULE
MDC GND
MDC 8.8V
1
2
CB12
R MAIN INPUT
1
2
CZ12
R MAIN INPUT
1
2
CB22
L MAIN INPUT
1
2
CZ22
L MAIN INPUT
Q12
A1312-GR
Q13
C3324-GR
C12
1nF
R19
56k,MF,5%
R111
100,MF,5%
R112
100,MF,5%
R110
56k,MF,5%
C14
10u/35V
C13
10u/35V
Q14
C3324-GR
Q15
A1312-GR
R115
15
R116
15
R103
82,MF,5%
Q16
A1015
Q17
C1815
R119
82,MF,5%
R120
82,MF,5%
C18
39p
C19
39p
L12 100uF
R159 100,5%
1
2
3
4
5
6
7
8
9
10
11
12
CZ11
CON12
Q102
A1312-GR
R123
47K
R149
68,1/4 1% MF
Q19
2SD1419-DM
Q101
C3324-GR
Q18
2SB1026-DM
D13
1N4148
D15
1N4148
D14
1N4148
D16
1N4148
R104
220k,MF,5% R102
220k,MF,5%
-18V
+18V
R154
10
R155
10
Q103
C3324-GR
R122
100K,MF,5%
C103
22uF/16V
R101
39K,MF,5%
R121
100K,MF
R106
82,MF,5%
R105
39k,MF,5%
Q104
A1312-GR
C104
22uF/16V
R169330
C124 1nF
Q22
A1312-GR
Q23
C3324-GR
C22
1nF
R29
56k,MF,5%
R211
100,MF,5%
R212
100,MF,5%
R210
56k,MF,5%
C24
10u/35V
C23
10u/35V
Q24
C3324-GR
Q25
A1312-GR
R215
15
R216
15
R203
82,MF,5%
Q26
A1015
Q27
C1815
R219
82,MF,5%
R220
82,MF,5%
C28
39p
C29
39p
L22 100uF
R259 100,5%
1
2
3
4
5
6
7
8
9
10
11
12
CZ21
CON12
Q202
A1312-GR
R223
47K
R249
68,1/4 1% MF
Q29
2SD1419-DM
Q201
C3324-GR
Q28
2SB1026-DM
D23
1N4148
D25
1N4148
D24
1N4148
D26
1N4148
R204
220k,MF,5% R202
220k,MF,5%
-18V
+18V
R254
10
R255
10
Q203
C3324-GR
R222
100K,MF,5%
C203
22uF/16V
R201
39K,MF,5%
R221
100K,MF
R206
82,MF,5%
R205
39k,MF,5%
Q204
A1312-GR
C204
22uF/16V
R269 330
C224 1nF JK41
1
2
3
CZ45
PHONES SOCKET
N8C320D03
R455
100,2W
R454
100,2W
1
2
3
S41A
4
5
6
S41B
ON
OFF
R172
15,MF,5%
R173
15,MF,5%
R272
15,MF,5%
R273
15,MF,5%
D431
24V
D432
24V
C450
10u/50V
C132
6.8pF
D111
3.3V/1W
C133 N.I.
C233 N.I.
SCHEMATICS DIAGRAM(3/4)
AMP CIRCUIT Vm1.1
PCB-1:MAIN BOARD Vm2.0
AMP SMD R CIRCUIT Vm1.0
PCB-7:AMP SMD R BOARD Vm1.0
AMP SMD L CIRCUIT Vm1.0
PCB-8:AMP SMD L BOARD Vm1.0
HEADPHONE BOARD Vm1.0
PCB-6:HEADPHONE BOARD Vm1.0
17

C79
27p
C710
27p
Y71
11.0592MHz
+5V
C7110.1u 20%
C
M
TU TA2 TA1
DI
S71
AUX
S72
TAPE2
S74
CD
S73
TAPE1
S75
TUNER
S77
MP
S76
DISC/MDC
D71
CD
D72
DISC
D73
MP
D74
AUX
D76
TUNER
D75
TAPE1
D77
TAPE2
R726
2K2
SOFT CLIPING
D716
Blue
R725
2K2
1
2
3
4
5
6
7
8
9
CZ71
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
CZ76
R730
10K
Q79
C1815
Q710
C1815
Q711
C1815
Q712
C1815
Q713
C1815
Q714
C1815
Q715
C1815
R741
4K7
R742
4K7
R743
4K7
R744
4K7
R745
4K7
R746
1K
R747
4K7
C714
10n
C715
10n
C716
10n
C717
10n
C718
10n
C719
10n
C720
10n
C AU TU TA2 TA1 DI
MP AUX TAPE2TUNER DISC TAPE1CD
MP
AUX
TAPE2
TUNER
DISC
TAPE1
CD
R754
4K7
R753
1K
R752
4K7
R751
4K7
R750
4K7
R749
4K7
R748
4K7
Blue
PROTECTION
+5V
VOL-
VOL+
+12V
+5V
+5V
Remote Mute
Protection
VOL+
VOL-
SOFT CLIPING
+12V
+5V
TO CB31
TO CB34
BlueBlue
Blue Blue Blue
R701
10K
Q73
C1815
IR IN
IR OUT
IR IN
IR OUT
+12V
R708 10
C722
1uF
D710
1N4148
D711
1N4148
D713
1N4148
D712
1N4148
+5V
+5V
R73
10K
+5V
+5V
R759
2K2
Q718
C1815
R760
4k7
TO MAIN BOARD CB35
MD
R761
4K7
C721
10nF
MD
+12V
R727
2K2
C723
100uF/16V
D714
1N4148
R762
10K
M AU
R763
10K
PHONE71
Ipod IN AGND
2
3
1
IC72
IS1U60L
1 2 3
CZ75
IR RECEIVER
G
VCC
L
R
SIGNAL
GND
P9 C758
100p
SHIELDING C759
100p
C760 0.1uF
R765 10
R766
10K
R767 10
C1+
1
V+
2
C1-
3
C2+
4
C2-
5
V-
6
T2OUT
7
R2IN
8R2OUT 9
T2IN 10
T1IN 11
R1OUT 12
R1IN 13
T1OUT 14
GND 15
VCC 16
IC76
MAX232D
C763
1uF
C762 1uF
C764 1uF
C765 1uF
R769 100
R768 100
S79
SPEAK B
S710
SPEAK A
Speak A Speak B
Speak A Speak B
C761
0.1uF
R770
20K
Speak A
Speak B
R773 10K R774 10K
Remote Mute
Q719
C1815
R777
4K7
C766
10n
R776
4K7
Mute Relay
Mute Relay
SOFT CLIPPING
C78
10uF,16V
R778 10K
D722
1N5819
MDC
MDC
AGND
R779 10K R775 10K
+5V
D723D724
R789
2K2
R788
2K2
D709
Blue
D708
Q720
C1815
Q721
C1815
R790
4K7
R791
4K7
C767
10n
C768
10n
R721
4K7
R720
4K7
Blue
1
2
3
4
5
6
CB78
CON6
R793 10K
L71
100uH
R796 N.I. R797 N.I.
C769 N.I. C770 N.I.
C771
1nF
C772
1nF
Module Detect
Module Detect
Tone Def
Tone Defeat
R798
2K2
MP REAR
M REAR
Q71
C1815
R719
4K7
C71
10n
MP REAR
R718
4K7
M REAR
/MDC
Blue
R799 10K
S711
TONE DEFEAT
D78
TONE
R728
2K2
Q727
C1815
R756
4K7
C724
10n
Tone Defeat
Tone Def
R755
4K7
Blue
DEFEAT
Red Blue
D717
3LED
Amber
R714 10K
R706
560
R709
1K2
R713
10K
R707
10K
R710
10K
R704
10K
R712
560
R716
10K
S712
STANDBY
R780 10K
R781
10K
+5V
P1.5/MOSI/ADC5
1
P1.6/MISO/ADC6
2
P1.7/SCLK/ADC7
3
P4.7/RST
4
P3.0/RXD
5
P4.3/CCP1/TXD2/SCLK
6
P3.1/TXD
7
P3.2/INT0
8
P3.3/INT1
9
P3.4/T0/CLKOUT0
10
P3.5/T1/CLKOUT1
11
P3.6/WR
12
P3.7/RD
13
XTAL2
14
XTAL1
15
GND
16
P4.0/SS
17
P2.0/A8
18
P2.1/A9
19
P2.2/A10
20
P2.3/A11
21
P2.4/A12
22
P2.5/A13 23
P2.6/A14 24
P2.7/A15 25
P4.4/NA 26
P4.5/ALE 27
P4.1/ECI/MOSI 28
P4.6/RST2/EX_LVD 29
P0.7/AD7 30
P0.6/AD6 31
P0.5/AD5 32
P0.4/AD4 33
P0.3/AD3 34 P0.2/AD2 35 P0.1/AD1 36 P0.0/AD0 37
VCC 38
P4.2/CCP0/RXD2/MISO 39
P1.0/ADC0/CLKOUT2 40
P1.1/ADC1 41 P1.2/RXD2 42 P1.3/TXD2 43 P1.4/ADC4 44
IC73
STC12C5A08S2-35I-LQFP44
EXTRA
TXD RXD
RXD
TXD
Blue LED
IR OUT
R782 100
R783 100TO MDC RXD
TO MDC RXD TO MDC TXD
TO MDC TXD
EXTRA
R784
5K1
R785
10K
XTAL2 XTAL1
XTAL1 XTAL2
1
2
3
4
5
6
7
8
9
11
10
CZ77
DB 9
1
2
3
4
5
6
CZ78
CON6
R792
100
1
2
3
4
CZ79
To Main CB39
Q724
A1015
+5V
Q722
A1015
Q723
A1015
+5V
Red LED
Amber LED
Blue LED
Red LED
Amber LED
+5V
Protection detect
Protection detect
R731
10K
R732
10K
R733
10K
R734
10K
R735
10K
R736
10K
R737
10K
R738
10K
R739
10K
R740
10K
R72
10K
R74
10K
+5V +5V+5V+5V+5V+5V+5V+5V+5V+5V+5V+5V
Standby
R75
10K
R76
10K
R77
10K
+5V
R723 10K
R724 10K
+5V
+5V
+5V
SCHEMATICS DIAGRAM(4/4)
KEY CIRCUIT Vm1.1
PCB-3:KEY BOARD Vm1.0
RS232 CIRCUIT Vm1.0
PCB-5:RS232 BOARD Vm1.0
18

R311
R442
R250
C234 R446
J180
R150
PCB-1:MAIN BOARD Vm3.0
CB47
MDC GND
MDC +8.8V
STANDBY
+5V
-55VA
J153
DGND
I-V
TRIG
R251
+55VA
AC DET
Q424
D429
L21
(GND)
(+55V)
(-55V)(-55V)
J205
R15 R12
C11 C17 (-18V)
J128 J94 C47 C447
FEEDBACK
J147
R129 R139
C111
R127
J189
R133
R131
J206
C15 (GND)
J138
(GND)
J187
(-18V)
J10
CZ12
R134 R138
D11
C110
VR12
D12
FEEDBACK
(-18V)
R171
J25 CB11
VR13
R126
C16
J141
J124
(GND)
(+55V)
(-55V) (+55V)
FEEDBACK
TP4
TP3
J136
C114
R439
IC41
R157
C122
R160
C121
J103
J125
J121
R158
R161
R156 J188
J126
(+55V)
R125
Q111
R142
R146
R145
(R-OUT)
J120
(R-OUT)
R144
J146
J101 J110 J109 J148
J122
Q113 C113
R107
R137
Q116
C127
J134 Q112
C112
J59
Q115
P3-RP3-R
R499
Q114
P4-RP4-R
C115
WHITEWHITE
(-55V)(-55V)
RED
(+55V)
RED J123
(+55V)
J142 J143
R427
C413
H3
(GND)
J96
J95
(GND)
J97
(+18V)
J213
P-GND
CB37
J98
R438
J80 J81
J82 J116
C445
H6
C449
IC402
H7
IC401
J40
TP11
C46
J89
(+18V)
(-18V)
C231
D111
D110
C43
R45
(GND)
J91
C44
J90
R401
Q43
R42
R44
R41
R43 R47
J105
C45
J107
R413
R48
Q44
R49
IC301
R497
R484
R496
R411 R410
C49
J199
C410
C411
C412
J111
J185
R485
J102
Q41 R414
J113
(+18V)
J115(-18V)
R412
J108
C444
C448
(-26V)
J181
C48
R46
J71
J72
Q42
J68
J67
J70
J69
(+18V)
(-18V)
(+26V)
(-26V)
H2
C420 C421
(GND)
J87
J86
J85
(GND)
CB33
R385
R383 R366
C131 J84
C345 VR301
J83 (GND)
J88
C366 R386
R384
C414
J75
J46
J112
C346
VR302
R486
R492
R429
C41
C42
R435
R415 R428 C443
C446
R494
Q414 Q413
Q422
Q423
J117
R495
C419
C432
J58
C422
J92(DGND)
H1
(+12V)
R481
J64
C451
(DGND)
(+18V)
J44
J177
R440
R493 R476
C425
J66
J51
J57
(-18V)
J65
(DGND)
CB34
VR3
J61
J62
J60 (DGND) J63
J53
R479
C428
C431
D37
J56
J50
CB31
J49
(DGND)
J52
(+5V)
J7
(+5V)
J35
J37
Q301
MDC 8.8V
(-55VA)
J47
(DGND)
(GND)
(+18V)
J76 (GND)
C324
R391
C319
J74
C341
CB32
C342
J79 (GND)
C320
C323
R392
J55
J54 (+55VA)
Q412
R441
J178
J45
J48
C430
C450
J137 (DGND)
(+18V)
Q421
R468
R469
R474
IC44
D428 R471
D418
J42
R470 R482 R478
D417
J43
C426
C429
R473
J36
CB48
J39
J41
MDC GND
D39
R472
R477 R480
TP10
D38
IC43
D316
C367
J203
CB39
D312
J209
CB36
(GND)
J13 (+5V) J32 (+26V) J33 (-26V)
J34
D311
J210
D310
FEEDBACK
J150
NAD C356BEE MAIN BOARD Vm3.0
(GND)
NAD ELECTRONICS COPYRIGHT C 2010
R224
D21
D22
R488
R491
J31
D419
D420
FEEDBACK
(L-OUT)(L-OUT)
P5-GNDP5-GND
TP1
C215
Q119
Q219
R170
J99
(GND)
R270
R143
H5
H4
Q110
J164
J151
R108
(+55V)
R148
R147
R248
R247
D27
J167
J173 (+55V)(+55V) J162
J168 J182
R243
J131
R244
R245
R246
J186
Q210
Q212
R208
C212
Q216
J78
J166
C227
J172
Q213
Q214
P2-L
R498
Q215
P1-L
J169
P2-L
(+55V)
(GND)
C214
REDRED
P1-L
WHITEWHITE
(+55V) (-55V)(-55V)
R162
C12/1
R262
R226
R417
R422 R424
R268
C223
D203
C27
D202
R136 R124
D17
R128
R132
D410
R130
R420
C120 Q11
R152
J106
(+55V)
J176
R425
R423
GND BAR
J190
Q21
J157
C220
R252
R419
R421
J133
C415
R418
J104
D411
D102
J156
J144
Q47 Q46
Q45
R416
Q48 J154 Q117 Q217
J159
D103
R168C123
Q118 Q218
R263
R163
D201
D101
IC11
J171
(+55V) IC21
C128
R166
(-18V)J119
R167
R165
(+18V)
J114
J118
(AGND)
R164
R264
R266
(GND)
J207
J93
(GND)
J191
J192
C228
C21
R21
J208
J195(-55V)
R267
R265
CZ22
J170
(GND)
J197
J198
(+18V)
J174
(-18V)
R228 R236
R232
VR23
VR22
R234
R238
C210
C416
R230
J100
J193
J194
C25
FEEDBACK
R271
CB21
R24
J73
(-18V)
J196
MAIN GND 1
R239
C211
R229
R227
R233
J77
C26
J183
R231
J135
(GND)
(GND)
J29
J202
J19
J20
(GND)
J21
J22
(PRE OUT R)
(GND)
(PRE IN L)
J11
(+12V)
J12
J23
J24
(GND)
(PRE IN R)
J204
D313
J27
J200
J163
J201
J15 (GND)
R333
D317
J17 J18
(GND)
(PRE OUT L) R334
TP2
L-OUT
R467
J130 J175
(-55V)(-55V)
IC42
R257
C221
J127
(+55V)(+55V)
J179
C222
(-55V)
R258
J158
FEEDBACK
J132
R260
R256
R261
C213 R237
R207
Q211
R242 R225
R453
R-OUT
L11
J184
J5
J30
R430
R433
Q425
R434
(+26V)
J155
RL12/2 RL12/1
R490
R487
R483
R445
R409
CB22
R298
C219
J8 J165
J4
GND
J3
J129
S41
(DGND)
J6
*
R151
C134
R198
C119
J2
C118 SPK A
SPK B RIGHT
RIGHT
White
GND
R335 R399
CB12
(GND)
J145
RED
GND RCA34
R336 R398
J140
RL310
J1
J26
RCA33
J28
RL38 RL37
J152
RL36
(GND)
J139 RCA32
RL35 RL34 RL32
RL33 RL39
RCA31
CB35
C362 R397
RL31
J149
PHONE1 R394
R389
R393 J38 R390
R395
Q302
C3
PHONE2
R396
R2
R452
J160
CB45
C218
SPK A LEFT
SPK B LEFT
*
R408
19

D537
C51
CB510 CB51
C52
D513
C558
R544
R585
PCB-2:POWER BOARD Vm2.0
D58
TRIG
D59
CB55
To AC cord
CB56
C54
To Power Switch
C524
F51:
T2.5AL/250V for 230V mains
T5AL/250V for 120V mains
IC51
TOP VIEW
D56
C527
H502
D51
C523
R571 L52
IC53
C556
D57 C545
R570
D541
H503
IC55
R578
C552 R577
C555
D531
C518 C517
H501
D55
D532
CB52
R584
C533
AC DET
I-V
C536
+55VA
-55VA
DGND
+5V
CB58
C551
CB53
C550
MDC+8.8V
STANDBY
MDCGND
R531
-55V
WHITE RED
+55V
F51 CB59 CB57
To AC Outlet
C53
L51
C539
C531
D536
D535
T51
To Main Trans.
D533
RL51
120V
C546
230V
+55V -55V
RED WHITE
CB54
PCB-2:POWER BOARD Vm2.0
BOTTOM VIEW
20