NAD 3240 - Amplifier Schematic Diagram

NAD
3240PE
AMPLIFIER SCHEMATIC
Make
leakage
current or
resistance
measure
ments
to
determine
that
exposed
metal
parts
are
acceptably
insulated
from
the supply
circuit
before returning
the
appliance
to the customer.
Leakage
current
should
not
exceed
0.5
mA
as
measured
through
a
1.5 Kohm
resistor paral
leled
by
a
0.15
mfd
capacitor
to the
earth
ground.
I
9515
5. 6%
R513
I
R403
156
0401
+10403
+
9407
JcLos
330
11W0P
j_l/ov
1/50V
2:2K
R409
0449
2.2K
loop
‘-IT
R517
2706
0407
R447
C429
+
3.95
156
1W 10/100V
+
+c1
D
401
9615
R417
R433
R435
1680
11.26
0401
I-frv—
2SC2240
R4I1OV
(39Y_
68
1J6V
v
3•6’Q9
I
5R42I
9425
254970
is
431041l
250
I
18
-10.612240
O.6V
-II-
loop
705
66V
67V
0405
2SA970
254970
680
±
1409
4
7/10
V
0403
0451
665
254970
0417
.7V
R461
47K
9445
47%
9419
Rk21
0411
4.75
-4-
VR4OI
10KB
430
R413
8.2K
1/2W
430
T
i. i.k
T
OFT
CLIPPING
L602—1
0408
___
0/7
5465
68
477
0419
0423
0V250669_
—t;;—--i 71V
258826
l00
25C3423
43
0417
‘
ja2:’5v.’
3.3 1/2W,’
750669
7
22P
5
R45j 15 ,’
\
I
276
S
118%
1/2W
12501047
3V
22/105
0412
22/105
9423
8.2%
1/2W
R443
220
0413
4.7V
9469
0441
R481
0437
470
R485
I
lOOP
lV
1/2W
35
:330p
3V
oi
0439
PTC1
1/2W
SW402—2
1/2W
R414
8,2%
?E;.;d.1
R424
8.2%
9416
9422
22/
10 V
J
15K
33bP
R493
6.8%
1W
0425
0406
-
,ç414
C415
220/105
1W
430
1.56
D402
12K 1W
-I-
0431
82V
0
-
0429
4.761/2W
0419
9453
VR4O
1.7V
I
258817
43V
R463 ,‘
1 ,4o
—
25C2240
2501062
ioo
675
±03l
0421
(1425
250669
—715
R479
10/1005
2541360
1.5% 430
0604
1854
435
2SC2240
9518
2706
R436
0408
‘1.2%
3.9K
22/105
+
0610
47
/10 V
44W
9406
0
39
T+t
+
9408
—43V
.
R448
430±I
R466
68
15%
1W
0423
25A470
10627
:C435
L 435
*
330P
)—63vI
R495
R487
043”
R491
0443
R483
LHFLHH
470
loop
15K
33Qp
9410
0433
8.2V
11
9499
2K
1W
0
0
0
Symbol
No.
06461
—up
R489,
490, 491,
492
2.2k
C
437,
438,
439,
440
39pF
C
441,
442, 443,
444
560pF
Q
435,
436
BD680
Q
437,
438
BD679
D421,
422, 423,
424
BY500—100
0403
9430
1
680
1
R4120V
75
2SC2240
0404 2502240
05 66V
0.6V
18
Bj7o
1452
R426
R478
0612
9432
1 25C
18
l8
V, 65
I224O
loop
.—l
F—
04OB970
0607
705
254970
R462
47%
9446
47%
0412
6.75
VR402
10K
9
10/1005
0420
2503423
0418
1.75
0418
250669
. >
0416
0436
R45
2.76
I
1
/
505 1/05
2.26
I
2.26
0406
8
.0
R404
200P
U
156
330
9516
5.66
9444
220
MAIN
IN
Cl-i
MAIN
IN
L
CH
TUNER
PIlONO
VIDEO
CD
TAPE
IN
RECOUT
REC OUT
—
TAPE
I
CD
VIDEO
PHONO
(
j1K
R230
TUNER
(•—
1%
C223
RCH
o.1;j
0614
4.75
432
R478
R482
0438
R490442R4981
I
100
470
I
I
250669’
715258826
15%
33OP
1261W
14l/2W_721
F 1 f
0440
0426
423 V 2
9470’
0428
1/2W
0422
2502260
—
BK 1/2W
2501047
665
0
9438
D
680
+
R450
.1C4l6
15%
1W
R5Ol
SPEAKER
SW
SW6O1-l
110
1W
e
LCH
..1_
C447
SPEAKER
00
A
c45
SPEAKER
—
SW4OI-2
R503
220 1W
______w..______________Vfl
J 402
1 201j,
HEADPHONE
RCH
L402
SW4OI-3
a-
0
SPEAKER
SPEAKER
I448
R
OH
1 R5O2
“B.,
10
IWSW 4 OI 4
—
712K
‘1
1OIK,(254
9529
4’- 2 --tL
)
2SA1015
0503
4.76
0505
R52
‘._I19V
2SCl8lS
$
8
I
R526—3ov
,7-,
2SC1SI
100%
05
___.i?N
R53O
I
295
THV
11.8%
I
*LED5O2
47%
—
R520
LE0502
I
,Eo501j
rIX
0519
3.9%
47/505
0454VR4
J1.7VO
‘169
675
2S12260
10/,00V
J
-J
0426
isp
4029
R229
1%
.
0203
+
0422
2S41360
435
•
-
I
R 4 SL76K1/2W
0424
254970
-
—
0436
R496
I
I
330
I
9663
. BK2
A-4O
L
71 VT330P
435
o1’I
OS’.
1/2W
435
_______
0420
0226
-7lV’ 434
250669
R492
0446
R500
U
_______
‘—71V
—715
9488
715_
8.2V
0438
R480
R48
‘—H
L1R4686B
2S01062
1100
1670
lOOP
15K
9201
9223
9225 16
3.3/SOS
4mV—
201
loop
IX
R213
R214
0213
1%
1k
+100/255
10201-1
4I
NJM2043
4’”114
4mV
34r*
100/255
2
l8mV
9215
7R2O968
R 3 JOj
C 2 l 8 68%
0207
1800P1
R211
47/105 0211
680
0209
2200P
B200P
T100P
BASS EQ
INFRA
SW7-1
5W8-l
0305
±
-w
1
/ 505
:0303
0.1
4001
L15
1KC2261OOP
R219
1%
0.
l
S41
R220
16
+
0501
0517
6
47/255
R5O5
1%
205
0515
ov
47/255
206
I
SW7-3
L]L
/9201-3
10K
LCH
21
RS11
1K
-+
0502
205
INPUT
SELECTOR
TUNER
SW3-1
+0217
TAPE
“1I
BALANCE
I
MON
I
I
LCH
22/105
SW4-’
59201-1
506
- R217
4
-
180%
SW6-1J
-
ji:
- SW4-2
I
SW5-l
I
JSTEREO
I
BALANCE]
RI
5R201-2
501’
0
0
IX
SW5O1
-2
RS1O
9509
390
680%
0
IX
922816
• 0228
T 100 P
+
1 c 3 O 1 / 4 w
I
I
1%
I
161 100.255
R3ll
R312
C31’
020
L CJ
NJM2043
1/2W
9325
2SK363
OUT
1
PRE
1mV38OO
—‘•-C3O7
1 _3_L,____>-_._.f--.- 41
R3O7
j
C317,,IOOP
I
—
1312O%47/1051
R329
VR2O2-1
IOKA
R313
LOW
4
LEVEL
9327
10/255
/505
C319
j68O
+
03091
‘.5i5.j
3 ’ 1’1 Iswg-1
I
I
R317
12
R321
I,
39K
03
11,
1
,,_J
1K ,
—
-H
180
VR2O3-1
0.016
0.1
—i
0504
20513
0501
330
I
6506
/3SVI
I
90503
L<
0502
205
+
205
C5’
47/25
V
0516
47/255
R5O6 1%
9508
‘l
68
0301
C514
330/355
R3O2
1M
0306
±
9512
1K
R227
6
0227
1.1
lOOP
SW3-2
IC2O1-2NJM2O63
Lij
7
R216
,..C2l8
4m5
13.3/50/
l8mV
680
R2O2
0204
+
TUNER
R218
Tioop
686
0208
‘C202
06
I
R212
47’1O5
0212
180K
680
0210
2200P 8200P
—20/0502
2SAl’I”
—285
SW7-2
SW8-2
H
0302
R3O6
l/0v
‘0304
R3OB
0.1
56K
0.15
SW7-4
9310
6502
44
>
0
59201’
4
VOL
EJ
R3O6
9
OH
180%
206
4.7/
505
5O1
WER
SW5O1-1
0521
US
4700
4005
—
:
4.7M
R522
1/2W
SW5O2
—I
715
80502
LF5045A
+
0
0022
AOO22
8 1ii
0501
*
___
I 1,,.
+
—fl--4-Hl---
0503
I 0,022
0.022
L_, 0 -, 0
-715
I
0dU
F5O3
5A
I
TREBLEI
10325
.L22OP
1C301-2
NJM2O43
0302
urns
5
+
C32
9326
R33O
6
—
ttts
47 /T’t8K
iON
_On,V
0318 lOOP
llmV
R314
120K
VR2O2-2
1OKA
R314
2S6363
PR
r—’
0310 j 0 , 68 IJ
3.6
SW9-2
R328
1O/25V/5O5
:—
P322
a-
j
0316
R32O
1064
0322
_j___
0,1
180
5R2O3-2
0.018 —
I
TREBLEI
—9—
SW502
F5Ol
4A
EU
Notes.
1
All lesistanve
values
are nIl k
10001!
M 1000KII
2
All
capacitance
values
are in
,,F P 10”
cF
3
All
resistors
are
1-6
watt, unless
otherwise
specified,
4
Voltages
measured
from point
indicator
to
chassis
ground
with VTVM
at
line
volume
control
minimum
and
no signal
lSneclficatioos
and
Circuits subject
to
change
wIthout
notice
mr mprucemnnt
I
—10—