NAD T748 Service Manual page 56

SCHEMATIC DIAGRAM ( PRE-AMP PART )
PRE-AMP CUP12373Z-1
1.SL_IN FL_IN
2.S_GND
3.CNT_IN
CNT_IN
4.S_GND
5.SR_IN
FR_IN
6.S_GND
7.FL_IN
SL_IN
8.S_GND
9.BSL_IN BSL_IN
10.S_GND
11.FR_IN SR_IN
12.S_GND
13.BSR_IN BSR_IN
14.S_GND
S_GND
15.MUTE_P MUTE_P
16.V_GND
17.HEAT
HEAT
18.CLIPPING_ON CLIPPING_ON
V_GND
FL_IN
SIG2
2-56
CNT_CH
C4013
CNT_IN
10/50V
S_GND S_GND
FL_FB1
+B
SL_CH SR_CH
FL+SIG
Q4023
A1268GR
R4018 C4015 Q4022
470 680P A1268GR
C4001 C4011
FR_IN
Q4001 Q4002
10/50V 10/50V
C3200BL C3200BL
C4036
FL_FB2
S_GND S_GND 12P S_GND S_GND
Q4003 Q4024
C3200GR
C3200GR
FL-SIG
_ S N G D _ S G N D -B
FL_CH
C4009
SL_IN
10/50V
S_GND S_GND
CNT_FB1
+B
FR_CH
CNT+SIG
Q4041
A1268GR
R4060 C4021 C4017
Q4040 R4032
470 680P A1268GR 470 680P
C4005
SR_IN
Q4007 Q4008
Q4019 Q4020
10/50V
C3200BL C3200BL C3200BL C3200BL
C4042
CNT_FB2
12P S_GND S_GND
Q4021 Q4009
Q4042
C3200GR C3200GR
C3200GR
CNT-SIG
_ S G N D _ S G N D _ S G N D
-B
FR_FB1
+B
BSL_CH
FR+SIG
A1268GR
Q4038
HVTKTA1268GRT
A1268GR
R4053 C4020 R4039 C4018
470 680P 470 680P
Q4037 C4007
BSL_IN
Q4016 Q4017 Q4010 Q4011
10/50V
C3200BL C3200BL
C3200BL C3200BL
C4041
FR_FB2
12P S_GND S_GND
Q4018 Q4039 Q4012
C3200GR C3200GR
C3200GR
FR-SIG
_ S N G D _ S G N D -B _ S N G D
SL_FB1
+B
BSR_CH
SL+SIG
Q4035
A1268GR
C4016
R4046 C4019 Q4034 R4025
470 680P A1268GR 470 680P
C4003
BSR_IN
Q4013 Q4014 Q4004 Q4005
C3200BL C3200BL 10/50V C3200BL C3200BL
C4040
SL_FB2
12P S_GND S_GND
Q4015 Q4006
Q4036
C3200GR C3200GR
C3200GR
SL-SIG
_ S N G D _ S G N D _ S G N D
-B
MUTE_P
1.MUTE_P
2.N.C
HEAT
3.HEAT
4.N.C
SR_FB1
5.N.C
+B CLIPPING_ON
6.CLIPPING_ON
7.P_GND
8.P_GND
SR+SIG
CN409
V_GND
Q4029
CN408
A1268GR
Q4028 FL_FB1
1.SL_FB1
+B
A1268GR 2.+B
+B
3.+B
FL+SIG
4.SL+SIG
FL_FB2
5.SL_FB2
FL-SIG
6.SL-SIG
-B
7.-B
C4038
SR_FB2 -B
8.-B
12P
Q4030
C3200GR
CN407
SR-SIG
CNT_FB1
1.CNT_FB1
+B
2.+B
+B
3.+B
CNT+SIG
_ S G N D 4.CNT+SIG
-B
CNT_FB2
5.CNT_FB2
CNT-SIG
6.CNT-SIG
-B
7.-B
-B
BSL_FB1 8.-B
+B
CN406
FR_FB1
1.SR_FB1
+B
BSL+SIG 2.+B
+B
3.+B
FR+SIG
4.SR+SIG
Q4032 FR_FB2
A1268GR 5.SR_FB2
FR-SIG
6.SR-SIG
Q4031 -B
7.-B
A1268GR -B
8.-B
C4039
BSL_FB2
CN405
12P
Q4033 SL_FB1
1.FL_FB1
C3200GR +B
2.+B
+B
3.+B
BSL-SIG
SL+SIG
4.FL+SIG
SL_FB2
5.FL_FB2
SL-SIG
6.FL-SIG
-B
_ S G N D -B 7.-B
-B
8.-B
BSR_FB1 CN404
+B
BSL_FB1
1.BSL_FB1
+B
2.+B
+B
3.+B
BSL+SIG
4.BSL+SIG
BSR+SIG BSL_FB2
5.BSL_FB2
BSL-SIG
6.BSL-SIG
-B
7.-B
Q4026
-B
A1268GR 8.-B
Q4025
A1268GR
CN403
SR_FB1
1.FR_FB1
+B
2.+B
+B
3.+B
SR+SIG
C4037 4.FR+SIG
BSR_FB2
SR_FB2
5.FR_FB2
12P SR-SIG
6.FR-SIG
Q4027
-B
7.-B
C3200GR
-B
8.-B
BSR-SIG
CN402
_ S G N D -B BSR_FB1
1.BSR_FB1
+B
2.+B
+B
3.+B
BSR+SIG
4.BSR+SIG
BSR_FB2
5.BSR_FB2
BSR-SIG
6.BSR-SIG
-B
7.-B
-B
8.-B
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