NAD 712 - Input, Speaker, and Headphone Circuits; Input Jack and Selector Circuits; Speaker Output and Headphone Amplifier Circuits

INPUT, SPEAKER & HEADPHONE
J201 L R243
mo
R241 1K C241
100K 100p
J202L R203 ov
AUX (? 1
R201 1K C201
100K 100p
J203 L R207 ov
cD
J204 L
LD
J211b
VIDEO
ov
TUNER TLERT
TO Li
FRONT
PANEL
OFF
TUNER
R543 10K
J211R R204
VIDEO
R202 1K C202
+12V
VR301A
50K
r 10/16
ov
Voltage Measured on IC201
PinNo. _V.
1 2
2-27 0
28 12
sw201
=
100K 100p
J204 R R208 ov
C204
100p
R206 1K
100K
J203 R
cD 3
2
J202 R
AUX (e 3
2
R212 ov
nie C206
1400p
R210 1K
100K
C208
100p
R214 1K
100K
J201 R
TAPE 2
IN
+ R244 oy
C242
100p
R242 1K
100K
J205L
TAPE 1
OUT L
J205 R
TAPE 1
OUTR
J206 L
TAPE 1
INL
J206.R
TAPE 1
C210
1C202B
10/16
5 NJM 072D oe aug bg B
UU
Z
+
6
R218
47K
ov
}
INR
J207L
TAPE 2
OUTL
J207 R
TAPE 2
OUTR
NAD-00126 / DRUCK 5
Voltage Measured on IC202 to 1C204 and IC301
Pin No. _V. PinNo, V.
1-3 0 5-7 0
4 2 8 12
NJM4558
+12V
R253
T20FF
Q200
2SC1815
1C204B
NJM4558
19
DGS
2SK363
ECB
2SC1815
2802878
NOTE:
1.
RESISTORS,
UNLESS
OTHERWISE
SPECIFIED,
ARE
1/4
WATT.
2.
ALL
CERAMIC
CAPACITORS,
UNLESS
OTHERWISE
SPECIFIED,
ARE
50V,
10%.
C302
10/16
TO TUNER
+12V
R319
220
Q301
2802878
R321
C317
100p
1C301A
4 NJM2068
R311
3K9 2%
R309
C309
C255
Q303
2SA1015
R324
10K
Q304
4g 2801815
EXTRA
SPEAKERS
1
.0V
Seat Mes we ten et be Sets Se aA tt Ae a2) SPEARS Bo hh leh ee | ee te on eee
LOUTPUT+ 4
EXTRA 4
SPEAKERS
Se cam (2)
= On/26 LEFT
cal ©
47n e
C554
== 10n/25 RIGHT
ROUTPUT- 20% (°)
pone cnn nr ne 1
1 TO 1
' SPEAKER '
| TERMINAL 1
t
\ '
$ t
' f
R OUTPUT + oF ! TO 1
EXTRA = 1 POWER (
SPEAKERS © | AMPLIFIER !
' 1
EXTRA 5 en) H
SPEAKERS ' CHASSIS !
' ‘
t '
J209 L
PRE OUT L
J209 R
PRE OUT R