Kenwood NXR-710 Service Manual page 83

P
CONTROL UNIT (X53-4490-10)
SB
33BU
33M
50M
33A
33M_1
CN22
242mVrms
R81
100k
R82
100k
33BU
32K
i2CCK
i2CDA
/RiNT
33M
TXD2
/FRST
TXD0
TXD2_DiS
SPSCLK1
SPSD1
SURGE
PROTECTOR
/PTT
i2CCK
i2CDA
/ioiNT
RXD0
/EPTT
RXD2
/HK R118
0
SBC
AMP_SW
/AF_MUTE
33M_2
32K
/RST
MOD
TXAF
Q
SCHEMATIC DIAGRAM
CN23
CODEC
IC14
AK4386VTP
9 8
DIF0 DEM
10 7
RoUT DFS1
11 6
LoUT DFS0
12 5
VCoM PDN
13 4
VSS LRCK
14 3
VDD SDTI
15 2
DIF1 BICK
16 1
TEST MCLK
C81 1000p
C80 0.01u
3.3V
RTC IC
IC17
R2023T
1 10
32KoUT VDD X2
2 9 L77-1802-05 C95
SCL oSCIN
3 8 2p
SDA oSCoUT
4 7 C96
INTRB CLKC
5 6 2p
VSS INTRA
R123
47k
C89 1000p
C90 0.1u
BUFFER
IC18
TC74VHCT244AFK
1 20
1G VCC
2 19
1A1 2G
3 18
2Y4 1Y1
4 17
1A2 2A4
5 16
2Y3 1Y2
6 15
1A3 2A3
7 14 SPSCLK1_DiS
2Y2 1Y3
8 13
1A4 2A2
9 12 SPSD1_DiS
2Y1 1Y4
10 11
GND 2A1
3.3V 5V
(A) (Y)
50M
C87 1000p
C88 0.1u
BUFFER
IC19
TC7MBD3245AFK
1 20
NC VCC
2
19
A1 oE
3 18
A2 B1
4 17
A3 B2
5 16
A4 B3
6 15
A5 B4
7 14
A6 B5
8 13
A7 B6
9 12
A8 B7
10 11 RXD2_DiS
GND B8
3.3V 5V
R
SQDAC
R80
82k
DETECTOR
A
AF AMP
IC13
TC75W51FK(F)
A
R78
1k
R87 C70
330k 0.22u
C49 C51 R282 R83 C65 D1
RB706F-40
1u 1u 100k 100k 1000p
Q4
DETECTOR
2SC4617(S)
DC SW
A
A
/BER_EN
BER_CLK
BER_DATA
/FRST_io
TXD0_RSi
SR_oE_DiS
i2CCA_5V 8
SCL
i2CDA_5V 9
SDA
10
NC_2
RXD0_RSo 11
A0
12
A1
13
A2
14
RESET
S
NXR-710
R110
6.8k
R111
100k
C73
47p
A
AF AMP
IC15
TC75W51FK(F)
R104
C74
39k
100p
R112
EXT_RSSi
100k
RSSi
A A
NAND GATE
IC23
TC7WT125FUF
1 G1 8
VCC
2 A1 7
G2
3 Y2 6 BER_DATA_5V
Y1
4 5
GND
A2
C107 0.1u
BER_CLK_5V
C105 0.1u
C106 0.1u
RS-232C
DRIVER/RECEIVER
IC21
ADM101EARMZ
1 10
GND VCC
2 9
C1- C1+
3 8
V- SD
4 7 TXD0_RSo
TIN ToUT
5 6 RXD0_RSi
RoUT RIN
28 AUXio4
GPB3
27 AUXio3
GPB2
26 AUXio2
I/O EXPANDER GPB1
25 AUXio1
IC22
GPB0
MCP23017TE/ML
24 R149 100k
GPA7
23 R150 100k
GPA6
22 R151 100k
GPA5
X53-449 4/6
T
SB
33M
50M
33A
SBC
AMP_SW
/AF_MUTE
33M_2
MOD
TXAF
83