NAD C-325-BEE Schematic

NAD

1

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SERVICE MANUAL

C 325BEE

STEREO

AMPLIFIER

C 325BEE

STEREO

AMPLIFIER

WIRING DIAGRAM

8

AC POWER PLUG

AC OUTLET

T401(TRANSFORMER)

POWER SWITCH

CB45

CB47

Q215

P1-L

-46V WHITE
+46V RED

P2-L

Q214

P5-GND

Q114

P4-R

+46V RED

-46V WHITE

P3-R

Q115

MAIN BOARD

CB21

CB11

CB32

CB33

CB35

CB31

CB34

AMP-SMD-R BOARD

CZ11

AMP-SMD-L BOARD

CZ21

IN MODULE BOARD

01-32560-01

CB61

OUT MODULE BOARD

01-32560-02

CB61

CB51

CB55

POWER BOARD

CB58

CB52

CB53

CB54

CZ45

HEADPHONE BOARD

Ipod SOCKET BOARD

CZ75

CZ74

CZ72

IR BOARD

CZ73

STANDBY BOARD

CB73

CB74

S75

S74

KEY BOARD

S76

S71

S72

S73

S77

CZ72_1

CZ71

CB72

CB56

CB59

CB57

DISC L

9

DISC R

VIDEO L

VIDEO R

AUX L

AUX R

TUNER L

TUNER R

TAPE1 IN L

TAPE1 IN R

TAPE1 OUT L

TAPE1 OUT R

TAPE2 IN L

TAPE2 IN R

TAPE2 OUT L

TAPE2 OUT R

11,12,13,14)

RT31

RT32

RT34

SW31

SCR

CONTROL

CIRCUIT

TRIG I-V

ISC CIRCUIT

(IC43,TL082D)

(4,5,6,7

IC74
CD4094

BASS

TREBLE

BALANCE

TONE DEFEAT

MIRROR
CURRENT
SOURCE

CIRCUIT

R467

POSISTOR

(80 DEGREE C)

01-32560-02

(IC44,UPC1237HA)

R439

POSISTOR

(90 DEGREE C)

INPUT SELECTION

CIRCUIT (BY RELAY)

MP L

MP R

CD L

CD R

01-32560-01

IN

˄˅

AMP CIRCUIT

PREAPM MODULE

Relay Switchs

RL12/2

Speaker R

Speaker L

F1AA012V

92

IC 75
CD4094

OUT

˄˅

AMP CIRCUIT

PREAPM MODULE

MUTE

CONTROL

CIRUIT

PROTECTION

CIRCUIT

VOL+

5

4

VOL-

VOLUME CONTROL

CIRCUIT (REMOTE)

Q31

MUTE

Q32

MUTE

POWER AMP

CIRCUIT L

PRE-OUT L

PRE-OUT R

S41

SOFT CLIPPING

CONTROL CIRCUIT

RT33

VOLUME

CONTROL

BLOCK DIAGRAM

MAIN IN R

MCU

MCU

(1,2,3)

(1,3)

HEADPHONE

JK41

POWER AMP

CIRCUIT R

MAIN IN L