NAD 375BEE C Service Manual

VOL-
VOL+
TONE
BRIDGE
IR IN
IR OUT
+26V
-26V
+5.6V
+5.6V
+26V
+26V
-26V
/1%
/16V
/1%
/1%
/1%
/5%
/5%
/5%
/5%
/1%
/1%
TONE DEFEAT RELAY
All Polyester capacitors are 63V 5% unless noted.
All Elec. capacitors are 50V 20% unless noted.
All Resistor are 1/6W 5% RJ13 unless noted.
BALANCE
VOLUME CONTROL
/1KV
/1KV
BALANCE
/1%
/16V
/1%
/1%
/1%
/5%
/5%
/5%
/5%
/1%
/1%
VOLUME CONTROL
TONE DEFEAT RELAY
/25V
/25V
FROM MAIN BOARD P202B
FROM DISPLAY BOARD P501A
/1KV/1KV
C310
220nF
C310
220nF
R312
180
R312
180
R308
732
R308
732
C326
100nF
C326
100nF
R325
2.2K
R325
2.2K
CW
RV305
10K
CW
RV305
10K
1 3
2
P301A
11PIN2.54-A80B
P301A
11PIN2.54-A80B
2
3
4
1
5
6
7
8
9
10
11
R324
2.2K
R324
2.2K
P302B
10PIN2.54-C
P302B
10PIN2.54-C
1
2
3
4
5
6
7
8
9
10
CW
RV304A
RK16312A10D 20KMNX2
CW
RV304A
RK16312A10D 20KMNX2
3 1
2
C314
220pF
C314
220pF
RL301A
JRC-27F/012/S
RL301A
JRC-27F/012/S
3
4
5
R311
180
R311
180
CW
RV306
10K
CW
RV306
10K
1 3
2
CW
RV303B
RK16812MGA10(20KBX2)
CW
RV303B
RK16812MGA10(20KBX2)
73
28
C313
220pF
C313
220pF
R301
75K
R301
75K
CW
RV301A
RK163121A2CA 10KAX2
CW
RV301A
RK163121A2CA 10KAX2
31
2
C307
100nF
C307
100nF
R303
47
R303
47
R315
N.I.
R315
N.I.
R313
51K
R313
51K
+
-
+
-
L
R
Vcc Vss
GNDL GNDR
M301
HS OPAMP STEREO
+
-
+
-
L
R
Vcc Vss
GNDL GNDR
M301
HS OPAMP STEREO
9
8
7
106 15
2
3
4
RL301B
JRC-27F/012/S
RL301B
JRC-27F/012/S
6
7
8
A
- +
RV303C
RK16812MGA10(20KBX2)
A
- +
RV303C
RK16812MGA10(20KBX2)
+ -
R304
47
R304
47
R307
732
R307
732
C305
22nF
C305
22nF
C329
470pF
C329
470pF
C317
100nF
C317
100nF
R305
3.3K
R305
3.3K
CW
RV302A
RK163121A2CA 10KAX2
CW
RV302A
RK163121A2CA 10KAX2
31
2
R333
47
R333
47
Q301
2SA1015
Q301
2SA1015
R334
47
R334
47
C309
220nF
C309
220nF
R327
2.2K
R327
2.2KC327
4.7uF
C327
4.7uF
+
C320
220uF
+
C320
220uF
CW
RV307
100
CW
RV307
100
13
2
R328
2.2K
R328
2.2K
R314
51K
R314
51K
+
C301
100uF
+
C301
100uF
R326
2.2K
R326
2.2K
+
C302
100uF
+
C302
100uF
+
C325
10uF
+
C325
10uF
C311
1uF
C311
1uF
C321
100nF
C321
100nF
C304
100nF
C304
100nF
R320
390
R320
390
Q304
2SC1815
Q304
2SC1815
+
C315
N.I.
+
C315
N.I.
R323
2.2K
R323
2.2K
Q302
2SC1815
Q302
2SC1815
CW
RV303A
RK16812MGA10(20KBX2)
CW
RV303A
RK16812MGA10(20KBX2)
61
45
C308
100nF
C308
100nF
C312
1uF
C312
1uF
C322
100nF
C322
100nF
R309
390
R309
390
+
C319
220uF
+
C319
220uF
R319
390
R319
390
D301
1N4148
D301
1N4148
+
C316
N.I.
+
C316
N.I.
CW
RV304B
RK16312A10D 20KMNX2
CW
RV304B
RK16312A10D 20KMNX2
64
5
CW
RV308
100
CW
RV308
100
13
2
C303
100nF
C303
100nF
R302
75K
R302
75K
R321
4.7K
R321
4.7K
C330
470pF
C330
470pF
C306
22nF
C306
22nF
CW
RV302B
RK163121A2CA 10KAX2
CW
RV302B
RK163121A2CA 10KAX2
64
5
R310
390
R310
390
R322
4.7K
R322
4.7K
R316
N.I.
R316
N.I.
CW
RV301B
RK163121A2CA 10KAX2
CW
RV301B
RK163121A2CA 10KAX2
64
5
R317
1.5K
R317
1.5K
+
C323
10uF
+
C323
10uF
RL301C
JRC-27F/005/S
RL301C
JRC-27F/005/S
1
2
Q303
2SA1015
Q303
2SA1015
C318
100nF
C318
100nF
+
C324
10uF
+
C324
10uF
R306
3.3K
R306
3.3K
R318
1.5K
R318
1.5K
R329
47
R329
47
- 12 -
SCHEMATICS DIAGRAM TONE CONTROL
01-37506-20

NAD 375BEE C Specifications

General

Signal-to-Noise Ratio	>100dB (A-weighted)
Input Impedance	20k Ohms
Inputs	7 x Line Level, 1 x Phono
Outputs	Preamp out
Power Output	150W x 2 (8 Ohms)
Damping Factor	>150 (8 Ohms)