NAD C 725BEE Service Manual page 23

C725BEE KEYBOARD
N.I.
R791
IC705
C770 N.I. 1
1 A0
DGND 2
2 A1
CZ706 3
A2
R787 N.I.
CON2 4
Vss
R776
C719 24C16
0R
22UF/16V
C771 N.I. DGND
DGND
DGND
R775 100K
R788 N.I.
1
2 +5.8V
C772 N.I.
DGND CON2
CZ707
R789 N.I.
IC704
3 4
RESET MR
2
GND
1 5
C773 N.I.
RESET VDD
DGND
TPS3825-50DBVT
R790 N.I.
C721
C774 DGND 0.1uF +5.8V
N.I.
DGND
R773
C717
+5.8V
100u/16V
33
1MEG
R774
R740
C712
10n
10K
V
IC702
3 18.432 MHz
IR RECEIVER
S DGND Y701
1
2 C722 C723
FM-6038TM2-5AN
20P 20P
G
DGND DGND
DGND
IC710
3Y GND DGND
3A 2Y
3B 2B
4Y 2A +5.8V
4A 1Y
D722 D723 R709
+5.8V
4B 1B +5.8V
1N4148 1N4148 10K
VCC 1A
R708
C768 15K
74HC86
0.1uF
DGND
C769
10uF/16V
DGND
D707 DGND
3LED
AMBER
BLUE RED
R717 R744 R718
+5.8V
100 220 220
R704 CLK1
10K
CNVss
RS232 TXD
CE
Busy
CZ710 RS232 RXD
CON6 Reset
CB710
CON6
KEY1
DGND
P1
C725BEE MP BOARD
CZ703
1
+5.8V
2
3
+5.8V CZ709
R777 R778
1K 1K
1
C720
2
8 0.1uF +5.8V
Vdd DGND 3
7
WP
6 DGND
SCL
R705
5
SDA
10K
Soft Clipping Detection
Soft clipping
+5.8V
+5.8V
DGND
C703 C704
0.1uF
100uF/16V
DGND
1
P91
2
P90
CNVss 3
CNVSS
4
P87/XCIN
CE 5
P86/XCOUT SDA/P20
Reset 6
RESET SCL/P21
7
XOUT
8
DGND VSS
9
XIN
10
+5.8V VCC
11
P85/NMI
12
P84/INT2
13
P83/INT1
14
P82/INT0
15
P81 RXD0/P62
16
P80 TXD0/P63
+5.8V
C778
R703
47p
DGND 4K7
C777
47p
Q702
C1815
R786
15k R785
10k
DGND
CZ708 HEADER 7X2 2.54 pitch
1 2
C779 C780 C781 C782 C783
3 4
5 6
47p 47p 47p 47p 47p
7 8 +5.8V
9 10
DGND
11 12
13 14
IC706
EC12E1220801-F20
DGND +5.8V +5.8V
R711 R712
10k 10k
R710
R713
10K 10K
C705 C706 C707
C708
0.1uF 0.1uF 0.1uF
0.1uF
DGND
D718
+12V
R795
1N4148
2.2K
TP701 D719
BLUE IC701
16-BT-130GINK
C739
AGND R767
10n
N.I. Q732
C730 C731 C732
C1815
R794
100p 100p 0.1uF
4K7
G L
R
AGND DGND
DGND
+39V
CZ705
R779
R793
TO MAIN BOARD CB35
10
4K7
DGND
+5.8V
MP LED
DGND
R748
10K*8
+5.8V
VFD RESET
VFD CS
VFD CP
VFD DA
48 PLL CE
P03
47 RDS CLK
P15
46 RDS DATA
P16
45 P5
P17
44 SDA
43 SCL
42 P4
P22
41 P3
P23
40 P2
P24
39 P1
P25
38 KEY4
P26
37 KEY3
P27
KEY2
36
P60 R763 10
35 KEY1 RS232 RXD
P61
34 DAB RXD RS232 TXD
33 DAB TXD
R764 10
IC703
M30281F6HP
Ipod TXD
Ipod RXD
DAB TXD
DAB RXD
D716
R722
2.2K
1N4148
D710 D711 D712 D713 D714 D715
BLUE BLUE BLUE BLUE BLUE BLUE
C710 C711 C713 C714 C715 C716
10n 10n 10n 10n 10n 10n
Q707 Q708 Q709 Q710 Q711
Q706
C1815 C1815 C1815 C1815 C1815 C1815
R727 R729 R731 R733 R735 R737
4K7 4K7 4K7 4K7 4K7 4K7
DGND DGND DGND DGND DGND DGND
R728 R730 R732 R734 R736 R738
4K7 4K7 4K7 4K7 4K7 4K7
RDS DATA
RDS CLK
PLL CE
PLL D0
PLL D1
PLL CLK1
Tuned
Stereo
R780
DGND
+39V
10
R784
C734
10K
0.1uF
S701 S703
FM Mute/Mode Tune up
Q731
C733
C1815
0.1uF
S702 S704
R782 R783
TONE DEFEAT Display
R781
100K 10K
33K
S705
Memory
DGND +5.8V
S706
R702
1k Blend
+3.3V
D721 D701 D702
1N4148 1N4148
3.3V
DGND
R761 100
R762 100
C767
IC709 C766
1nF
1nF
9 8 C729 +5.8V
R2OUT R2IN
10 7 0.1uF/25V
T2IN T2OUT
11 6 DGND
T1IN V- DGND
12 5
R1OUT C2-
13 4
R1IN C2+
DGND 14 3 C728 0.1uF/25V
T1OUT C1-
15 2
GND V+
16 1
VCC C1+
C727 0.1uF/25V
C724
SP232EEP-L
10uF/16V
+5.8V
C725 0.1uF/25V
+5.8V
+12V
C775
0.1u IC711
CD4094
DGND DGND
DGND
CZ701
8
7
6
5
4
3
2
1
CON8
S707 S711
P1
SpeakerB
AUX
KEY1
S708 S712 S716
Preset down TAPE MP
S709 S713 S717
Preset up TUNER DISC
S710 S714 S718
Tune down SpeakerA CD
D703 D704 D705
1N4148 1N4148 1N4148
R714 R715 R716 R749
10K 10K 10K 10K
DGND
DGND
To Ipod RXD
To Ipod TXD
+3.3V +5.8V +5.8V To DAB RXD
To DAB TXD
R752 R753 R754 R755
22K 4K7 4K7
4K7
TO PREAMP SCH
+5.8V +3.3V +5.8V +3.3V
Q701
R765
C1815
Q724 R760* R759* R758* R757*
Q733
1K
DTC114 22K 4K7 4K7 15K
DTC114
DGND
Q704
KSC2690
Q703*
Q723*
C1815 C1815 +5.8V
MP DOCK SEL
BAND
IR OUT
IR IN
IP SEL CLK
IP SEL DATA
IP SEL STB
OP SEL DATA
+5.8V OP SEL CLK
OP SEL STB2
Unit Protect
C718
DGND
+5.8V
0.1u IC707
+12V
CD4094 TONE DEFEAT
SPEAKER B
SPEAKER A
MAIN MUTE
RECORD MUTE
Soft clipping
TO PREAMP SCH
DGND
TO POWER BOARD
VFD POWER1
VFD POWER2
DGND
+39V
+5.8V
STANDBY
R723
Trans. Protect Det.
+5.8V
D724
10k
R720 R719 5.1k
10k
22K AH
Q734
1N4148
C1815 C776
R721
10k 100uF/16V
DGND
CZ704
1
2
3
4
5
6
7
8
R766
1K5
+12V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CZ702
CZ711
7
6
5
4
3
2
1