NAD 7225PE - Page 9

100 mm
SCHEMATIC DIAGRAM NAD 7225PE AMPLIFIER
+ 28V
}R2
er
220/63
$
201-11
$201-7
VIDEO
$201-3
TAPE
G205 $201-9 PHONES201-5 CD $201-1
120)
3.7MH
2S
A
10157
: 4201
P201-A FM AM
PHONO
:
R233
180/2%
;
R29
[]
S233
R235
, C218 10/16 680
R221 160
P301-1 120K/2"%. 1OK/2°% = C219
= = fei 47/25
(3 be)
VIDEO a325/1K €337/100P
P30! at !
=3 CD R347/1K =
< VOOP
ian C339/
&
(P125)_ (P126)
TO TUNER
—_ i
C329 3 4.047
pi
CG
|
P302
R3S50/1K
C=
—_)
a
TO TUNER
7
ae (P25) (P26)
0 cD R3L8/1K = C222
am ?
P30!
IDEO
R346/1K
10K
£70
Ws
y
7
220/63
ame
(o>) C338/100P
= P301I-2
P2013 ee02 3 = ibecstt
PHONO R238 6202 C2274 = R236
470.—ts—«*S hskg C216 R222 10/16 680
(
q
pc
=a
a
7
C230
PR
204
ts
es
SOP, 56K C204
3
i
=
i
P
220K
ar
at ~
G2
Saez
=
120K/2"%%,
10K
/2%
+
$ 201-12 $201-8 $201-4
+ Oliv
Cy R615
Roi
670
R663
330W
0401
cians
S461-1
WN4148
L401
;
o—HO]
1UH
MAIN
JN
C401
-
To
;
s are 5 2K2
P30};
1076
ms
a
PL01-B
fro
|
C405
ALCO.
(433
C447
7
0015
=
820P
a
1
A.
401
: Reov770K «= S408 470 35
—-
nee
C417.)
C435
ab
0801
IN4148
|
D803
IN4168
a
a
)
SPKA
R809
R81
PLOI-A
18K
|-4.8V
-2.8V
+2.8V
+
<.8V
|
18K
cele
TVET
TT)
*
Pee
lh
cae
9)
-e-
I)
=
OY
as
:
C801
|RBOS
|R8O)
|R803
|RAO7
|
,c
803
nes
a.
a
ry
wa01
(€)
2260
1K
wK8
+1K8
|
1K
1
(0)
“¢
=
+
4
= 22/6
as
na
eet
RLS9
$aoi-) UC
eH 411V
220 V C229
[}390"
0608
aoe]
po
eek
:
9
HG?
meses
DLOL/IN6IE8 CL12 Q406 Bay. 460 C430
are . Sm :
Ce) 3
Reio | Ree | R&20
0402
R406
22K
18K
390
Care
3.371W
[rete
recess)
CJ
=e
C420
,
220P1CL26/22P
RLEL
OO
INgieg
«=:
390
yesee
suas
47P
RL30
CL26
A
-
L
MAIN IN = 22K K 22P Cece -
C402
Ri22
«RUPE
C402
—
+
Ree?
"01
@
=
ae
_
i
vali
wi
ee
C452
aii
KS
C208
Ka
aw
0015
303-4
R402
106
C406
+
:
=
:
=
e.
J
ee
:
71
<i
weetless ont Le are 19)
R462/220K
CLiG
_
47/10
|
ey
67
ap
2428
‘6
SJ;
a
T
a
67/25 : (er) = CLe6
448 1K ec C436
pace
co1a/
psa
Vaw
A
specee'®
MJ2955
ie
45% VK lJ2W
2805
|
:
C&ee
fy
R458
=
ey
:
:
CLe2Z0C47
|
-001
a9
10/1
SPK
HZNA-2
C802
|
RBCS
|
R807
|
RALL|
R88
Dass
066.63
:
ame.
-7aVv
Suny
tia
=
=
3
$
401-2
$201-2
C332
R336
2K2
t =
ee | | R308 390 & sass wt 10318
ine
i
1
3K9
—-
R60
C336 i R304 180K 66 oe 4 f C326 i
n33SB : 0308 C321 | 082
}
R324
22 £20K8 | ee) 1sasorsy 1K
C3062 SS
i R3L40B R148
| 10KC C326 | |soxe
p326 180 6320.1 | O40} 332
a
> O1.iV
(8 OFM) = BT C506 .1
= ~~} E501
ears a ae
teceety Q505 2$B633
eee IN5401
Enns
T
2
=
.01/500V
C512
° }
0507 1N540)
0508 INS4O1 $5028
502 8 ohm
ee INS401 .01/500¥
td
= 40.17 C507 | R02] 0504 INS401 F502
(4 OHI)
| = F505 1A
+ LV <p +50¥ O O
68 100/10
+
R336 sary
(c) NAD Electronics Ltd.
$201 -FUCTION SWITCH (OFF)
R313 6K8 $201 1-2 ‘ TAPE /MONITOR
J +28V | 2013-4 <CD
| C327 $201 5-6 + VIDEG
| ee J S201 7-8 > PHONO
: i $201 9-10 > AM
R315 C 313 + $201 11-12: FM
bK8 47/25 S301 1-2 : STEREO/MONO SWITCH (STEREO)
‘ Q 305 $301 3-6 : LOUDNESS SWITCH (OFF)
C3G1
1
R305
82K
Rat
2KT
348
-)
$401
1-2
:
SPEAKERS
SWITCH
(A)
——
C4
Cg
$$01
>
POWER
SWITCH
(OFF)
‘
€303
C307
R319)
6345
S502
A-B
:
TURBO
SWITCH
(8
OHM
POSITION)
|
100P
68
|
100/10
S801
1-2
:
SOFT
CLIPPING
SWITCH
(OFF)
Fn
ba
33
ee
:
-)
-
=
an
-
329A ey 390 NY D303 R321 C317 R327 R329 560
20KB Q301 IN4148 i : 018 1SK 3K9
'R303 186K BcS60d 08 ‘ C323 G} 2Sk 363 PRE OUT
C309 15P Q307 1. C 321 082 P 303-1
(a \ 2S A1015Y pid 47/10 |
+40V LY
|
|
i
6328
R340A
R3LIA
R6CS
©)
Mi
-
28.3V
2@
|
1
|
ae
SOKC
22M
R309
3K9
OS
Ba
R325
180
©
319
-1
<
OT
R331
4
fe oes -28V os = eT: 2N 3055
|
|
:
[|
6
MJ
2955
;
ss
=
ae
-28V
;
:
}
ae Rate KA 6K8
C335
'
12.3
390P.
=
P125
Q
R316
PRE
OUT
10 TUNER | [ :
|
|
6K8
a
2SC1815Y
sae
i
F301
2SK
363
€302 1 R306 82K j R312 2K7
Se ©
C306 C308 0302
| 100P —— BC5S60C R320] ¢36 Qa310 |G 4.
as
F506 1A
IN&168
0513
HZ26-1
R330 s60
120V
|
2
3.
4
0602
INcuSs —L
NOTES:
RESISTORS ARE 1/twW S% UNLESS OTHERWISE SPECIFIED.
aT?
1 1K2
PS02
[| 2M7 72W
Ree)
2SA95S0Y
1SA1015Y
C603 2SC1815Y
22/100 pore 2SL 2120
= — ehisy 2502260
R602
is R604 517
150K 2SAININ pc37
ISK
220¥/50HZ |
{
on el
U.S.A
CANADA
% DENOTES COMPONENTS MOUNTED UP FROM P.C.B.
ea | DENOTES PARTS MOUNTED ON HEAT SINK .
R&SS AND R456 USED FOR IDLING CURRENT ADJUST ONLY.
MUST BE SHORTED IN NORMAL OPERATION.
S. VOLTAGES SHOWN ARE MEASURED WITH NO SIGNAL APPLIED.
w& THERMISTOR 1S MOUNTED ON THE MAIN HEAT SINK.
OS15/1N4002
C$27/0)
€$28/.01
ae
0514/1NCO02
R$25
S6/ IW Q514/ 2SAI3S6Y
1991
ECB
2SB649A
280 669A
BO 139
7SAL96
eae)
BC550C
BC556B
BC S68OC
BCE
258633
280613
+56V
TO TUNER
+122W
TO 1y NER