NAD T747 Service Manual page 61

SCHEMATIC DIAGRAM (AMP #2 PART)
ST+5.6V
IC484
ST202EBW
C4841
0.1uF
C4842
0.1uF
RS232 JACK
C4843
0.1uF
C4844
0.1uF
R4846
R4847
RESET
RESET SW
JK485
IC485
DAB JACK
2 VOUT VIN 1
T747/737(C)
4 3
R4851
47K
0
R4990
IPOD JACK
0
R4991
6
5
0
R4992
IPOD_TX
3
R4993 0
2 IPOD_RX
4
7
1
JK486
0
R4887
ST+5.6V
R4874
0(T)
IR OUT1(T747)
IR IN(M80)
JK487 R4875
IC487
2 KP1010B
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 Q4898
KRA107S
IR OUT2(T747) 10
2
IR IN2(M80)
JK489
JK488 Q4893
3 KTA1272Y
R4894
2
DC TRIG.
10/1W
(M70 ONLY)
1
IC466
2 VIN 1
R4666
4
47K
3
3 2 1
CN466
3-65
CN498 CN497 CN499
1 2 1 2 1 2
+12V
FAN2 FAN3 FAN1
ON:85'C ON:75'C
Q4944
KTA1272Y
R4946
47/1W
R4945
10K
Q4934
KTA1272Y
R4938 R4936 R4934
10/1W 10/1W 4.7/1W
Q4942
R4935 KRC107M
D4942
10K
1SS133M
Q4931
RS232_TX
1.0 KRC107M
D4931
RS232_RX
1.0 1SS133M
+12V
Q4862
KRC107M
SIGNAL DETECT
Q4861
KRC111M
D4862 C4861
R4861
1K 1SS133M
10/50V
DAB_TX
DAB_SPDIF
DAB_RX
DAB+6.5V
ON OFF
FAN1 0.38V 0.32V
FAN2,3 0.48V 0.38V
Fan Detect
R4931
33K
DAB_ON
ST+5.6V
Q4871
KRA107S R4914
10
Q4872
KRA107S
RC_IN_OUT
+12V
Q4892
DC TRIG. ON
STB
C107M
DATA
CLK
C4990
0.1uF
C4991
0.1uF
CN490
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4
CN491
FROM MICOM BOARD FROM MICOM BOARD
R4890
7.5K
R4891
7.5K
PROTECTION
R4952
47K
Q4950
KSA1175Y
+12V
Q4954
KSC2785Y
Q4955
DC PROTECT KSA1175Y
Q4957
KSC2785Y
1SS133M
R4958
OVER
D4951
2.2K
Q4956
KSC2785Y
THERMAL PROTECT (110'C)
Q4925
R4923 R4924 KSC2785Y
1K 20K
POSISTOR +12V
R4922 R4921
1K 0
Fan2,3 ON
Fan1 ON
HEADPHONE ON
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
Q4769
KSC2785Y
R4765
B+
10K
R4768
22K
BN492
5 6 7 1 2 3 4 5
TO POWER BOARD
3 2 1
4 5 6
BSR
R4959
FL
15K
R4961 FR
15K 3 2 1
C
R4962
Q4901
15K 4 5 6
KRC107S
R4963 SL
15K
R4964 SR
15K
Q4902
BSL
R4965 KRC107S
15K
R4966
15K
3 2 1
4 5 6
Q4904
KRC107S
3 2 1
4 5 6
Q4905
KRC107S
3 2 1
4 5 6
Q4906
KRC107S
D4965
+BV 2
15A/600V
1 4
3
R4978
15K
B- GND49
R4769 D4770
1.5K 1SS133M
POWER_DOWN
ST+5.6V
3-66
+12V
BN490
+12V
GND
H.P_ R
R4902
390/1W
GND
H.P_L
R4901
390/1W
C4940
JK492
0.1uF
2
FL
1
JK494
1
FR
2
3
CNT
4
JK495
1
+ SL
-
2
3
+ SR
-
4
5 BSL
+
-
6
7
+ BSR
-
8
9
10