NAD C541i User manual

NAD
C 541i
COMPACT
DISC PLAYER
C 541i COMPACT DISC PLAYER
SERVICE MANUAL

2
CATUION
HGKJDHSGKJHGSJK
ADVARSEL
HGKJDHSGKJHGS
KBVNCLKNBCVLKNLKNVLKNCVNCLVK JK
ADVARSEL
HGKLFH;L;HJMNMD
HFKLJHJLDKLJLKDJLKFHJHSGMMKJHGSJK
VARING
HGKJDHSGKJHGKLGDJH
KLHKFG;LKNG;LKJGF;LKJGF;LKJFL;SJK
VARO!
HGKJDHSGKJHJBJKBKJBJKGS
KBVNCLKNBCVLKNLKNVLKNCVNCLVKJK
VORSICT!
HGKLFH;L;HHBHHJD
JHFKLJHJLDKLJLKDJLKFHJHSGKJHGSJK
SAFETY INFORMATION
CAUTION
CAUTION
- INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL
- USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG
SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
ADVARSEL
- USYNLIG LASERSTRÅLING VED ÅBNING, NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ
UDSÆTTELSE FOR STRÅLING.
VARING
- OSYNLING LASERSTRÅLNING NÄR DENNA DEL ÄR
ÖPPNAD OCH SPÄRRAR ÄR URKOPPLADE. STRÅLEN ÄR FARLIG.
VARO!
- AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET
ALTTIINA NÄKTMÄTÖNTÄ LASERSÄTEILYLLE. ÄLÄ KAISO
SÄTEESEEN.
VORSICT!
- UNSICHTBARE LASERSTRAHLUNG TRITT AUS, WENN
DECKEL GEÖFFNET UND WENN SICHERHEITSVERRIEGELUNG
ÜBERBRÜCKT IST. NICHT DEM STRAHL AUSSETZEN.
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.
OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:-
(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED,
INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED
OPERATION.
The lightning flash with arrowhead, within an equilateral tri-
angle is intended to alert the user of the presence of
uninsulated "dangerous voltage" within the product’s
enclosure; that may be of sufficient magnitude to consti-
tute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intend-
ed to alert the user of the presence of important operating
and maintenance (servicing) instructions in the literature
accompanying the appliance.
CLASS 1
LASER PRODUCT

3
SERVICE SAFETY PRECAUTIONS
1. Replacing the fuses
CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE
OF FUSE.
Reference No Part Number Description
M507 *AH 5120-0052-0 FUSE T1.6A 250V 5x20MM
M507 *C 5120-0050-0 FUSE T1.6A 250V 5x20MM
M512, M513 *AH 5120-0020-0 FU T1A 250V UL/CSA 5x20MM
M512, M513 *C 5120-0018-0 FU T1A 250V SEMKO/VDE
M514 *AH 5120-0026-0 FU T315MA L 250V UL/CSA
M514 *C 5120-0027-0 FU T315MA L 250V
NOTE:
<*AH > : USA, CANADIAN MODEL ONLY.
<*C > : EUROPEAN MODEL ONLY.
2. Safety check out
(Only U.S.A. model)
Before returning the product to the customer, make leakage current or resistance measurements to determine that
exposed parts are acceptably insulated from the supply circuit.
Parts marked with the symbol are critical with regard to the risk of fire and electric shock.
Replace only with parts recommended by the manufacturer.
CONTENTS
DESCRIPTION PAGE
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
REAR PANEL / FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
RF PATTERN TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
IMPORTANT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11
PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-21
IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-26
TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28-33
MECHANISM EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
MECHANISM EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

4
SPECIFICATIONS
Disc Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . One Disc, 120 or 80 mm
Decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BURR-BROWN Delta Sigma 24bit
Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Times oversample
Analog Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 pole active
Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +/- 0.5 dB, 5Hz - 20kHz
De-Emphasis Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +/- 0.3 dB
THD (at 0 dB, 1kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.002%
Intermodulation Distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . < - 100 dB
(19 + 20 kHz)
Dynamic Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 dB
Linearity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +/- 0.5 dB, 0 dB to -80 dB
Signal / Noise Ratio (A-Weight) . . . . . . . . . . . . . . . . . . . . . . . ≥100 dB, De-Emphasis on
≥100 dB, De-Emphasis off
Channel Separation 1kHz . . . . . . . . . . . . . . . . . . . . . . . . . . >90 dB
10 kHz . . . . . . . . . . . . . . . . . . . . . . . . >80 dB
Wow and Flutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unmeasurable (Quartz Crystal Accuracy)
Output Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 Ω
Output Level at 0 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 V rms
Digital Error Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IRC with double error correction in C1 and C2
Digital Code Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sony / Philips Serial data format
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12W
CONTROLS
Play / Pause, Stop, Random, Skip (< >), Scan (< >), Open, Time, Repeat.
PHYSICAL SPECIFICATIONS
Dimensions 435 x 80 x 285 mm
(Width x Height x Depth)
Net weight 4 kg (8.8 lbs)
Shipping weight 5.1 kg (11.22 lbs)

5
1. LINE OUT
2. DIGITAL OPTICAL & COAXIAL OUTPUT
3NAD LINK IN / OUT
4. IR INPUT
5. TRIGGER IN
6. TRIGGER SWITCH
7. AC LINE CORD
1. POWER ON / OFF
2. DISC DRAWER
3. DISPLAY
4. OPEN
5. PLAY / PAUSE
6. TIME
7. STOP
8. REPEAT
9. RANDOM
10. SCAN Back ( ) / Forward ( )
11. SKIP Back ( ) / Forward ( )
12. STANDBY LED
i
i1
REAR PANEL / FRONT PANEL
REAR PANEL
FRONT PANEL

6
DISASSEMBLY INSTRUCTIONS
1. Remove machine screws M 4.0 x 6.0 ( 1 to 4 ) from the side panels.
Remove tapping screw 3.0 x 8.5 ( 5 )from the back panel.
Refer to Figure No.1.
Figure No.1
2. Pull both sides of the TOP COVER slightly outwards 6 and tilt approx. 35˚ and then remove
in the direction as indicated by the arrow 7 . Refer to Figure No.2.
Figure No.2.
5
4
3
1
2
7
6
6

7
BLOCK DIAGRAM
U301 M38B59EF SYSTEM CONTROL CPU & VFL DISPLAY DRIVER
Q401- Q403
MUTE CIRCUIT Q301-Q304
MUTE
M313 RCA JACK
Q603
Q307
M313 IR_IN
M318
RCA JACK
DIGITAL
OUTPUT
U402
NAD LINK
MICRO-
CONTROLLER
U403
74HC00 NAND GATE
NAD LINK
IN
M501
VFL DISPLAY
M314
TRIGGER
SWITCH
M315
TRIGGER IN
NAD LINK
OUT
M319
RCA JACK
18 67 19 69 59 70 60 80 6222
32
68 72 25
11
23
15
9
1312
109
8
11
20
1 79 80 24 41 56
35 40
27
1 3
16 13
4
64 6361 66
51 59 40 41 43
65 66 58 67
63 64
1 9
2 4
3 6
60
L
R
L
R
CD AUDIO
O/P
25 12 15
16 18 28
U201
LXD3017Q
DSP
1
27
6 2
11
U101
CX2581
RF AMP
RFAC
FE
SETE
RFDC
SRDR
SFDR
FRDR
FFDR
TRDR
TFDR
SPDR
LOADING
MOTOR
DISCO
DISW
LOADING MOTOR
LIMIT SWITCH
SPINDLE
MOTOR
SLED
MOTOR
PU-IN
LIMIT SWITCH
PICK
UP
DISC
M113
REMOTE
SENSOR
CD MECHANISM UNIT
POWER
TRANSFORMER
AC POWER I / P
Q101
U302 PCM1732
DAC
U306 U305
U501,U507
DIGITAL
POWER
U502-3,U506
ANALOGUE
POWER
+8V +5V +12V 5V
-12V
D514-D517
RECTIFIER
DIODES
D501-D504
RECTIFIER
DIODES
D510-D511
ZENER DIODES
-22V
F1 F2
D506-D508
RECTIFIER
DIODES
U403
74HC00
NAND GATE
M303
EMC FILTER
L301
DIGITAL COIL
M316
OPT JACK
DIGITAL
OUTPUT
M500
Q310
K501
RELAY
K502
RELAY
Q312
8
Q103
426 27
1 2
12 13 16 17
5 9
10 20 19 24
15
29 28 33 32 31 30 26 27
U202
BA6392
KEYBOARD
M110 M109
REPEAT
M105 M108M107
RANDOM
M102
M106 M104 M103
TIME
M101

8
WIRING DIAGRAM
M102 (16PIN)
M301A
M505A
M506A M120A
M105A (6PIN)
CD MECHANISM
LIVE BOARD
DISPLAY BOARD
KEY BOARD
MAIN BOARD
LED BOARD
M101 (5PIN)
BROWN
BLACK
NEUTRAL LIVE
RED
M502
TRANSFORMER

9
RF PATTERN TESTING
Testing
Point
NAD - C 541i PCB TESTING POINTS DIAGRAM
TESTING PROCEDURE
(1) Load the test disc (Sony Test CD YEDS-7) and set the unit into PLAY mode.
(2) Connect the scope to R227 (Pin 15 of U101) and DGND (J144).
Scope setting: Coupling : AC.
Vertical sensitivity : 0.2 V/ div.
Horizontal time base : 0.5 µS/div.
(3) Observe the waveform is 2.0V p-p +/-5% and the eye pattern is at its best shape (see FIG. 1).
FIG. 1 (a) FIG. 1 (b) Poor eye pattern
FIG. 1 (C) Good eye pattern
3T 4T 5T — 11T

10
IMPORTANT NOTES
INSTRUCTION FOR HANDLING OPTICAL SYSTEM BLOCK PICK-UP
Electrostatic breakdown of the laser diode in the optical system block may occur due to a potential difference caused
by electrostatic charge accumulated on clothing, human body, etc. A ground must be provided as follows to prevent
any electrostatic charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a ground band (1M ohm) that is properly to remove any static electricity that may be charged on the
body.
2. Ground for Work Bench
Be sure to place a conductive sheet (1M ohm) or copper plate with proper grounding on the work bench or other sur-
face on which the pick-up is to be placed.
3. Because the static electricity charge on the clothing does not discharge through the body grounding band, do not
let clothing to get in contact with the pick-up unit.
PRECAUTIONS FOR CHECKING BEAM EMISSION
The laser beam of this unit is focused on the reflecting surface of the objective lens in the optical system block.
Therefore, keep your eyes at least 12 inches (30 cm) away from the objective lens when the laser diode is ON.
(Operation Check Method for Laser Diode and Focus Search Function.)
When the POWER switch is turned ON after the chucking plate is removed, observe the objective lens and confirm
that the following operations are performed properly.
(The optical system should be at the lead-in area position when it is checked at this time.)
(1) The laser should be at the innermost position after the chucking plate is removed.
(2) The diffused light of the laser beam can be seen when the POWER switch is turned ON.
(3) Vertical (up and down) movement of the objective lens (2 or 3 times) will take place.
INCORRECT CORRECT
NOTE: Laser diodes are so susceptible to damage from
static electricity that even if a static discharge does not
ruin the diode, it can shorten its life or cause it to work
improperly.
1.Grounding band
1M ohm
1M ohm
2.Conductive Sheet
or Copper Plate

11
PRECAUTIONS WHEN CHANGING LASER PICK-UP
When removing the pick-up assembly, short circuit the PCB tracks on the optical block as show in the drawing in
order to protect the pick-up before removal.
NOTE: Replacement pick-up assemblies are supplied with the PCB pattern already protected.
DO NOT REMOVE THE SHORT CIRCUITS UNTIL YOU HAVE FINISHED FITTING THE PICK-UP.
Caution:
Laser diodes are extremely susceptible to damage from static electricity. Even if a static discharge does not ruin the
diode, it can shorten its life or cause it to work improperly. When replacing the pick-up, use a conductive mat, a
grounded soldering iron, and so on, to protect the laser diode from static damage.
Ground Conductive
Wrist Band for Body
Ground Line
Less than
10 ohm
Conductive Gum Mat
Soldering
Iron with
Ground
wire
Protective soldering place
for laser diode

12
PCB LAYOUT
DISPLAY BOARD
KEY BOARD
LIVE BOARD
LED BOARD

1413
MAIN BOARD

L302
10uH
VCC
R308
3K
R309
3K
X301
4.00M
UNLD
LOAD
XRST
XLAT
CLOK
DATA
SCOR
SYSM
RW/ROM/LDOFF
RW/ROM/LDOFF
SCLK
SQCK
1/2X
CD/CDR
DISCO
DI/SW
R331 4K7 R332 1K
R333 4K7 R328 4K7
R327 4K7
R334 4K7
SQSO
SENS
C301
33p
C302
33p
C303
0.01u
1
2
3
Q311
8050
D303
IN4148
R312
10K
R311 100K
C308
10u/16V
VCC
C304
0.1u
C305
220uF/16V
C307
47uF/10V
D+5V VCC
DAT 1
GND 2
VCC 3M113
REMOTE
+D5V R313
10 C420
10uF/16V
TP301
M101
B.SCAN
M106
OPEN/CLOSE
M102
F.SCAN
M107
PREV
M103
REPEAT
M105
RANDOM
M104
TIME
M109
STOP
M108
NEXT
M110
PLAY
R303
6K2
R302
6K2
R305
2K
R304
2K
R307
1K
R306
1K
R310
3K
R301
1K
VCC
TP303
SYSM
SQSO
SENS
SCOR
DATA
CLOK
XLAT
XRST
LOAD
UNLD
SCLK
SQCK
1/2X
CD/CDR
DISCO
DI/SW
MUTE
R317
1K
R314 OPEN R315 1K
M314
TRIG SW
AUTO
OFF
R318
470
R336
10K
D304
STANDBY
RED
GREEN R319
560
1
2
3
Q309
8050
1
2
3
Q310
8050
R1316 4K7
D307
IN4148
K501C
RELAY SW
+10V
TP302
75/5
1
P74/AN4
2
P73/AN3
3
P72/AN2
4
P71/AN1
5
P70/AN0
6
P61/CT02
7
P60/CT1
8
P47/1NT2
9
/RESET
10
P91/XOUT
11
P90/XIN
12
VSS
13
XIN
14
XOUT
15
VCC
16
P46/T3OUT
17
P45/T1OUT
18
P44/PWM1
19
P43/BUZ01
20
P42/INT3
21
P41/INT1
22
P40/INT0
23
P87PWM0/FLD39
24
P86
25
P85
26
P84
27
VEE
28
P83
29
P82
30
STANDBY
31
POWER
32
P37/FLD31
33
P36
34
P35
35
P34
36
P33
37
P32
38
P31
39
P30
40
P17/FLD23 41
P16 42
P15 43
P14 44
P13 45
P12 46
P11 47
P10 48
P07FLD15 49
P06 50
P05 51
P04 52
P03 53
P02 54
P01 55
P00 56
P27/FLD7 57
P26 58
P25 59
P24 60
P23 61
P22 62
P21/FLD1 63
P20 64
P57 65 P56 66 P55 67 P54 68 P53 69 P52 70 P51 71 P50 72
AVSS 73
VREF 74
P65 75 P64 76 P63 77 P62 78
P77/AN7 79
76/6 80
U301
MCU
-VP
VCC
F1/01
1F1/02
2NP
36G/03
45G/04
54G/05
63G/06
7NC
82G/07
91G/08
10 NC
11 P1/09
12 P2/10
13 P3/11
14 P4/12
15 NC
16 NC
17 P5/13
18 P6/14
19 P7/15
20 P8/16
21 NC
22 NC
23 P9/17
24 P10/18
25 P11/19
26 P12/20
27 NC
28 P13/21
29 P14/22
30 P15/23
31 P16/24
32 NC
33 F2/25
34 F2/26
35
TP318
VFD
VFD3 VFD4 VFD5 VFD6 VFD7 VFD8
VFD9
VFD10
VFD11
VFD12
VFD13
VFD14
VFD15
VFD16
VFD17
VFD18
VFD19
VFD20
VFD21
VFD22
VFD23
VFD24
F1
F2
VFD3
VFD4
VFD5
VFD6
VFD7
VFD8
VFD9
VFD10
VFD11
VFD12
VFD13
VFD14
VFD15
VFD16
VFD17
VFD18
VFD19
VFD20
VFD21
VFD22
VFD23
VFD24
VCC
R329 4K7
R330 OPEN
R321
10K
NADLINK
REM_IN
1
2
3
Q312
8050
K502C
RELAY SW
D308
IN4148
C419
103
C310
100uF/6V3
D409
U301-P50
IN4148
1
2
3
Q402
2SD1012F
1
2
3
Q403
2SA1015
R412
4K7
R413
47K
R406
7K5
R415
7K5
1
2
3
Q401
2SA1015
R416
47K
R405 22K
C408
22u/16V
D411
IN4148
C407
2200u
16V
D403
3V3
MUTE
A+12V
R403 10K
R335
10K
VCC
1
2
3
Q307
8050
R338 10K
C403
OPEN
R322
15K
D305
IN5393
C306
0.1u
VCC
SENSOR
1
3
2
M315
TRIGGER_IN
M38B59EF
MCU
15 16
SCHEMATIC DIAGRAM
NOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESS
OTHERWISE SPECIFIED.
2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESS
OTHERWISE SPECIFIED.

SL+ 1
SL- 2
RCIN1 3
SRDR 4
SFDR 5
VREFI 6
VREFO 7
GND 8
FRDR 9
FFDR 10
RCIN2 11
FCS+ 12
FCS- 13
GND1 14 MUTE
15 TRK+
16 TRK-
17 RCIN3
18 TFDR
19 TRDR
20 VCC
21
VCC1
22 VBIN
23 SPDR
24 VBIN1
25 SP-
26 SP+
27 GND2
28
GND 29 GND
30
U202
BA6392
SQSO 1
SQCK 2
XRST 3
SYSM 4
DATA 5
XLAT 6
CLOK 7
SENS 8
SCLK 9
VDD 10
ATSK 11
SPOA 12
SPOB 13
XLON 14
WFCK 15
XUGF 16
XPCK 17
GFS 18
C2PO 19
SCOR 20
COUT
21
MIRR
22
DFCT
23
FOK
24
LOCK
25
MDP
26
SSTP
27
SFDR
28
SRDR
29
TFDR
30
TRDR
31
FFDR
32
FRDR
33
VSS
34
TEST
35
TES1
36
XTST
37
VC
38
FE
39
SE
40
TE
41
CE
42
RFDC
43
ADIO
44
AVSS0
45
IGEN
46
AVDD0
47
ASYO
48
ASYI
49
BIAS
50
RFAC
51
AVSS3
52
CLTV
53
FILO
54
FILI
55
PCO
56
AVDD3
57
VSS
58
VDD
59
DOUT
60
LRCK
61
PCMID 62
BCK 63
EMPH 64
XVDD 65
XTAI 66
XTAO 67
XVSS 68
AVDD1 69
AOUT1 70
AIN1 71
LOUT1 72
AVSS1 73 AVSS2 74
LOUT2 75
AIN2 76
AOUT2 77
AVDD2 78
RMUT 79
LMUT 80
U201
CXD3017Q
R2014K7 R2021K R2031K R2041K R2051K R2061K
R2071K R2091K R2101K R2111K
R212 100K
R213 10K R214 8K2
R215 4R7
R217 1K
R21815K R21915K
R220100K
R221 OPEN
R222 0
R223
33K
R224 10K
R225 100K
R226
1M
R227
100
R228
3K3
R229 3K3
R230 10K
C207 0.1u
C208
0.1u
C209 1500p
C210
0.1u
C211 27p
C212
27p
C214
470p
C215
470p C213
0.1u
XLAT
DATA
SYSM XRST SQCK SQSO
TP201
TP202
TP203
TP204
TP205
TP206
TP207
TP208 TP209
/SQSO
/SQCK
/XRST
/SYSM
/DATA
/XLAT
/CLOK
/SENS
/SCLK
/GFS
/SCOR
/SQSO /SQCK /XRST /SYSM /DATA /XLAT /CLOK /SENS /SCLK /GFS /SCOR
V3V6
C201 220p
C202 220p
C203 0.01u
C204 220p
C205 220p
C206 330p
CLOK
SENS
SCLK SCOR
CLOK SENS SCLK SCOR
TP210 TP211 TP212
V3V6
VC
SFDR
SFDR
SRDR
SRDR
TFDR
TFDR
TRDR
TRDR
FFDR
FFDR
FRDR
FRDR
SPDR
SPDR
VC
VC
+8V
C229
470U/16V
TP213
/XRST
TE SE FE
FE SE TE
C217 0.1u
C216 0.01u
C219 0.47u
V3V6
C218
100p
V3V6
C221 0.01u
RFDC RFAC
C220 0.47u
C223
1500p
V3V6
C222
0.1u
TP214 AGND TP216
X210
16.9344M
TP217 TP218
C225
30p
C224
30p
EMPH
BCK
PCMD
LRCK
XLAT DATA SYSM XRST SQCK SQSO
RFDC RFAC
1 2 3 4 5 6
M105A 6PIN
FCS- FCS+ TRK-
TRK+
C226
0.33u/50V D201
1N4001
L201 27uH
VCC
C230
100uF/10V
FCS- FCS+
TRK- TRK+
EMPH
BCK
PCMD LRCK
C227 0.1u
C228 0.1u
CN202 DEBUG
R231 OPEN
CLKO
CLKOCLKO
DIG_OUT
XRSTA
DSP
R209
1K
17
DISPLAY
NOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W
UNLESS OTHERWISE SPECIFIED.
2. CERAMIC CAPACITORS, ARE 50V 10%.
UNLESS OTHERWISE SPECIFIED.

18
VC 1
VDD 2
E3 D4 A5 B6 C7 F8
GND 9
LD 10 VR 11
PD 12
FCS+ 13
TRK+ 14
TRK- 15 FCS- 16
M102 16PIN LD
1
PD
2
EQ_IN
3
AC_SUM
4
GND
5
A
6
B
7
C
8
D
9
E
10
F
11
SW
12
DVCC
13
DVC
14
RFAC
15 FE 16
FEI 17 TE 18
TE_BAL 19
CE 20
CEI 21
VCC 22 RFG 23
BST 24 VFC 25 RFC 26
VC 27
RFDCO 28
RFDCI 29
DC_OFST 30
U101
CXA2581
1
2
3
Q101
8550
R101
10
R103 20K R104 20K
R105 3K
R106
150K
R107 100K
R108 68K
R109 15K
R110 3K
R111 4K7
R112 5K1
R113 5K1
R114 5K1
R115 1K8 R116 12K R117 12K
R118 10K R119 15K
C101 0.1u
C102 0.1u
C105
100u/10V
C106
100u/10V
C107
100u/10V
C108 100u/10V
C109
100u/10V
VDD1
VC
VDD1
C110
100u/10V
VDD1
TP101
FE TE SE SE
TE FE RFAC
RW/ROM/LDOFF
TP105
TP106
TP107
RFDC
FCS- TRK-
TRK+
FCS+
FCS- FCS+ TRK+ TRK-
L101 10uH
V3V6
RFDC
RFAC
RW/ROM/LDOFF
TP108
TP109
TP103
1
2
3
Q103
8050
1/2X
1/2X
TP104
1 2 3 4 5
M101 5PIN
1
2
3
Q104
8550
1
2
3
Q105 8550
1
2
3
Q106
8050
1
2
3
Q107
8050
R121
1K
R122 1K
R123
1K
R124
1K
VCC
LOAD
UNLD
TRAY- TRAY+
DI/SW
DISCO
DISCO DI/SW
LOAD
UNLD DI/SW DISCO
R125
4R7
L102
10uH
C103 0.1u
Q106B 2.2u/50V
RF AMP
NOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESS
OTHERWISE SPECIFIED.
2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESS
OTHERWISE SPECIFIED.

19
LRSY
ROMXA
CK2
CLKO
M302A
16.9344MHz
C328
20p
C329
20p
DGND
DGND
C320 10u/16V
AGND
C324
10u/16V
AGND
C376
100u/25V
C378 224K
R356 3K6
R360 16K
C353 100p R396 4K7
A-12V
AGND
R364
1K5
R368 2K2
R372 2K2
C357 2700p
C363 4700p
C367 680p
C369
100u/25V
C382 224K
R376 75R
R374
100K
R380 75R 1
2
M317A
LINE_OUT_L
Q302 2SD655F
Q304 2SD655F
C325 10u/16V
C334
10u/16V
C326 104K
D+5V
DGND
C321
10u/16V
AGND
R320 470R
EMPH
C323 10u/16V C322 104K
A+5V
D301
IN4148
D302 IN4148
C327 104K
C332
10u/16V
A+5V
D+5V
R337 560
2 3
1
U306A OPA2604
6 5
7
U306B OPA2604
8 4
U305C OPA2604
DGND
R378 4K7
R382 4K7
R414 100K
A-12V
C375
100u/25V
C377
224K
R355 3K6
R359 16K
C352
100p R394
4K7
A-12V
AGND
R363
1K5
R367 2K2
R371 2K2
C356
2700p
C362 4700p
C366 680p
C368
100u/25V
C379 224K R375
75R
R373 100K
R379
75R 3
2
M317B
LINE_OUT_R
Q301
2SD655F
Q303
2SD655F
2 3
1
U305A OPA2604
6 5
7
U305B OPA2604
8 4
U305C OPA2604
R377
4K7
R381 4K7
MUTE
1
2
M318
DIG_O_RCA
R384 75R
C387
103K
1 2
3
4
L301
CHASIS
1
2
M319 NAD LINE
1
2
M319 NAD LINE
R411
100R
C416
104K
C409 104K
CHASIS
OUT IN
R408 100R R409
100R
P24 P25 P26 P27 VCC X2 X1 P31 P32 P33
P00 P01 P02
GND
P20 P21 P22 P23
1 2 3 4 5 6 7 8 910
11 12 13 14 15 16 17 18
U402 NADLINE_001
R383
150R
C385 2200p
Vin
GND
Vout
1
2
3
M303 DST310
C386
104K
R397 4K7
J528
C383
22u/10V
C384
1000p
1 2
3
U403A
74HC00
4 5
6
U403B
74HC00
D+5V
DIG_OUT
D412
1N4148
D415
1N4148
DGND
DGND
D414
1N4148
12 13
11
U403D
74HC00
9 10
8
U403C
74HC00 D413
1N4148
R410
100K
R407 4K7
D431
1N4148
TELECONTROL
D426 1N4148
M402A
12MHz
C415
27p
C414
27p
C450 104K
CHASIS
C412 104K
C413 104K
L401
10uH
DGND
D+5V
14
7
U403E
74HC00
C380 104K
C381 104K
C371 470u/16V
C372 470u/16V
R391 220R 1/2W
R390
220R 1/2W
C374 470u/16V C373 470u/16V
R393 220R 1/2W R392 220R 1/2W
A+12V
A-12V
R395
4K7
C417
104K
C418
10u/16V
D+5V
HDCD
LED1
C370 103K
LRCIN
DIN
BCKIN
CLKO
XTI
XTO
DGND
VDD
HDCD
VCC2R
AGND2R
EXTR
VOUTR
AGND1VCC1
VOUTL EXTL AGND2L VCC2L GAIN ZERO RST CS/IWO MODE MUTE MD/FSS MC/DEM ML/I S 1
2 3 4 5 6 7 8 9
10
11
12 13 1415
16 17 18 19 20 21 22 23 24 25 26 27 28
U302
PCM1732U
(A)
(A)
(A)
(A)
(A)
(A)
(A)
(A) (A)
(A)
(A)
(A)
IR
M316
DIG_O_OTP
D+5V
C361 104K
IN4148
D404
Q404 DTA114
Q405 DTC114
R402 1K
MUTE
D+8V
U301-P50
D/A
TO MCU
AMP
NOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESS
OTHERWISE SPECIFIED.
2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESS
OTHERWISE SPECIFIED.

20
1 2 3 4 5 6 7 8
9
10 11
M502
TRANSFORMER TOROID
M507 T1.6A 250V M514 T315mA 250V M512 T1A 250V M513 T1A 250V
J801
120V
J802 230V
AC1 CORDEST
1
2
3 4
M810 TLN120A150W3R0
M802
POWER_SW
C800
4700p
FERRITE RING ONLY IN C VERSION
D514
IN4001
D516
IN4001
C543
104K
C541 104K
C501 104K
D515
1N4001
D517
1N4001
C542
104K
C540 104K
Vin
GND
Vout
1
2
3
U507 7808
DGND
C713
0.022u
F1 F2
C529
3300u/16V
C528 104K
C532
104K
C508
1000u/10V
C533
1000u/10V
Vin
GND
Vout
1
2
3
U501 7805 C511
220u/10V
C710
100u/6.3V
D+5V
D+8V
DGND
C560
100u/25V
D508
1N4001
D507
1N4001
C561
100u/16V
D506
1N4001
C510
100u/50V
R520
470R
Q502
2SA950Y
C521
22u/50V
D510 22V 1/2W
C522
47u/35V
D511
5V6 1/2W
R523
47K
R518 470R
R517 470R
F2 F1
-VP
C502 104K C503 104K D501 1N4001 D502 1N4001
C506
1000u/25V Vin
GND
Vout
1
2
3
U502 LM317TC545
104K
DGND
C505 104K D504 1N4001 D503 1N4001 C504 104K
C507
1000u/25V
C546 104K
R503
2K2
R504
2K2
R501 240R
C539
10nF
C544
10nF
C537
10u/25V C538
10u/25V
R502 240R
C513
10u/25V
C512
10u/25V
AGND
C535 104K C534 104K
A+12V
A-12V
Vin
GND
Vout
1
2
3
U506 7805
D505 3V3
C527
470u/16V
A+5V
C526 104K
C525
1000u/10V
AGND
AGND
(A) (A)
(A)
(A) (A)
(A)
(A)
Vin
GND
Vout
1
2
3
U503 LM337T
(A)
K501A RELAY
K501B RELAY
K502A RELAY
K502B RELAY
C514
104K
R510 OPEN
C515
104K
POWER
NOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESS
OTHERWISE SPECIFIED.
2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESS
OTHERWISE SPECIFIED.

21
1 3 2
M313 IR_IN
3 2
1
U601A LM393
C605
680P
L601 27mH
R611 100K
R606 1K5
5 6
7
U601B LM393 R604
1K8
R605 10K
4 8
U601C LM393
C606 104K
C609 100u/10V
1 2 3 4 5
J602A
RMO
Q602 2SC1923
Q603 2SC1923
R622
10K
R623
10K
R614 202K
R615 10K
C607 100P
DGND REM_IN D+5V IR DGND
R603 10K
R609 10K
R631B 220 R631A 220
REMOTE
NOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESS
OTHERWISE SPECIFIED.
2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESS
OTHERWISE SPECIFIED.

22
MAIN BOARD
U101: CXA2581N
IC BLOCK DIAGRAM
AC SUM
AC VCA
EQ_ON/OFF
VC
DVcc
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
VC VC
VC
DVC
DVC
VOFST
VOFST
B C A D
VOFST
EQ
APC
23
RFG
24
BST
26
RFC
25
VFC
14
DVC
27
VC
5
GND
22
Vcc
1
LD
2
PD
12
SW
11
E
10
F
9
D
8
C
7
B
6
A
15 RFAC 30 DC_OFST 29 RFDCI 28 RFDCO 17 FEI 16 FE 19 TE_BAL 18 TE 21 CEI 20 CE 13 DVcc
3
EQ_IN
4
AC_SUM
-
+-
+
VC
VC
DVC
DVcc
-
+
-
+
-
+
-
+
DVcc
-
+
-
+
DVcc
-
+
gm gm
VC
VC
VOFST
DVC
DVC
-
+
+
VC
Vcc
APC-OFF (Hi-Z) RW/ROM (H/L)
Vcc +
MAIN BOARD
U202: BA6392FP
1CH1OUTF 28 GND
2F
INTER
FACE
REV
FWD
R
CH1OUTR 27 CH4OUTF
3RCIN1 26 CH4OUTR
4CH1RIN 25 VBIN
190K
100K
25K
25K
DRIVE
MUTE
5CH1FIN 24 VSIN
6VREFIN 23 VBIN
7VREFOUT 22 VCC
8GND 21 VCC
9CH2FIN 20 CH3FIN
10CH2RIN 19 CH3RIN
11RCIN2 18 RCIN3
12CH2OUTR 17 CH3OUTR
13CH2OUTF 16 CH3OUTF
14GND 15 MUTE
+
-
+
-
THERMAL
SHUTDOWN
CIRCUIT
F
INTER
FACE
REV
FWD
R
F
INTER
FACE
REV
FWD
R
LEVEL
SHIFT