NAD T737 Service Manual page 55

SCHEMATIC DIAGRAM (AMP #2 PART)
C4841
0.1uF
C4842
0.1uF
RS232 JACK
C4843
0.1uF
C4844
0.1uF
RESET
RESET SW
JK485
DAB JACK
T747/737(C)
0
R4990
IPOD JACK
0
R4991
6
5
0
R4992
3
R4993 0
2
4
7
1
JK486
R4874
0(T)
IR OUT1(T747)
IR IN(M80)
JK487 R4875
2
10 0(M)
R4871
1
22
R4876 0(T) 270
24
0(M)
21 R4877
R4880
IR IN(T747)
0(T)
IR OUT(M80)
21
24
DC TRIG.
22
1
IR OUT2(T747) 10
2
IR IN2(M80)
JK489
JK488
3
R4894
2
DC TRIG.
10/1W
(M70 ONLY)
1
IC466
2 VIN
3
3 2 1
CN466
3-56
CN498 CN497 CN499
1 2 1 2 1 2
FAN1 +12V
FAN2 FAN3
ST+5.6V
ON:85'C ON:75'C
IC484
Q4944
ST202EBW
KTA1272Y
R4946
47/1W
R4945
10K
Q4934
KTA1272Y
R4938 R4936 R4934
10/1W 10/1W 4.7/1W
Q4942
R4935 KRC107M
D4942
10K
1SS133M
R4846
Q4931
RS232_TX
1.0 KRC107M
D4931
R4847
RS232_RX
1.0 1SS133M
+12V
Q4862
KRC107M
SIGNAL DETECT
Q4861
KRC111M
R4861
1K
DAB_TX
DAB_SPDIF
DAB_RX
IC485
DAB+6.5V
2 VOUT VIN 1
ON OFF
4 3 FAN1 0.38V 0.32V
R4851
FAN2,3 0.48V 0.38V
47K
Fan Detect
IPOD_TX
DAB_ON
IPOD_RX
Q4871
KRA107S
0
R4887
ST+5.6V
IC487
KP1010B Q4872
KRA107S
RC_IN_OUT
Q4898
KRA107S
+12V
Q4893
KTA1272Y
Q4892
DC TRIG. ON
STB
C107M
DATA
CLK
1
R4666
4
47K C4990
0.1uF
C4991
0.1uF
CN490
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
FROM MICOM BOARD FROM MICOM BOARD
R4890
7.5K
R4891
7.5K
PROTECTION
R4952
47K
Q4950
KSA1175Y
Q4954
KSC2785Y
Q4955
DC PROTECT KSA1175Y
Q4957
KSC2785Y
R4958
2.2K
Q4956
KSC2785Y
D4862 C4861
THERMAL PROTECT (110'C)
1SS133M
10/50V Q4925
R4923 R4924 KSC2785Y
1K 20K
POSISTOR +12V
R4922 R4921
1K 0
Fan2,3 ON
R4931
33K
Fan1 ON
HEADPHONE ON
ST+5.6V
R4914
10
16 15 14 13 12 11 10 9
1 2 3 4 5 6 7 8
FRONT ON
R4911
CEN ON
100
R4912
SUR ON
100
R4913
BS ON
100
B+
BN492
1 2 3 4 5 6 7 1 2 3 4 5
CN491
TO POWER BOARD
3 2
4 5
BSR
R4959
FL
15K
R4961 FR
15K 3
C
R4962
Q4901
15K 4
KRC107S
R4963 SL
15K
R4964 SR
15K
Q4902
+12V BSL
R4965 KRC107S
15K
R4966
15K
1SS133M
OVER
D4951
3 2
4 5
Q4904
KRC107S
3 2
4 5
Q4905
KRC107S
3
4
Q4906
KRC107S
+BV
R4978
15K
B- GND49
Q4769
KSC2785Y
R4765 R4769 D4770
10K 1.5K 1SS133M
R4768
22K
3-57
+12V
BN490
+12V
GND
H.P_ R
1 R4902
390/1W
GND
6 H.P_L
R4901
390/1W
C4940
JK492
0.1uF
2
FL
1
2 1
JK494
1
5 6 FR
2
3
CNT
4
1
6
JK495
1 1
+ SL
-
2
6
3 SR
+
-
4
5 BSL
+
-
6
7
+ BSR
-
8
9
10
2 1
5 6
D4965
2
15A/600V
1 4
3
POWER_DOWN
ST+5.6V