Kenwood NX-720 Service Manual page 70

P
NX-720(G)/720
B-BUS
FSX0
CLKX0
C543 0.1u
18.423MHz
X501
L77-3015-05
3
oUTPUT GND
2
4
VCC
VC
1
D
DGND2
DGND1
DVDIo7
DVDIo6
DVDIo5
DVDIo4
DVDIo3
DVDIo2
DVDIo1
DVDD10
DVDD9
DVDD8
DVDD7
DVDD6
DVDD5
DVDD4
DVDD3
DVDD2
DVDD1
GPIo11
GPIo10
GPIo9
GPIo8
GPIo7
GPIo6
GPIo5
GPIo4
GPIo3
GPIo2
GPIo1
GPIo0
IC507
SIMRST
ASIC SIMCK
SIMDT
SYMTIM
FSDET
TXRVE
TRAMP
TMoD
PSTPA
PSTIF
PSTPLL
RXRVE
RXSLT
PSRRF
PSRIF
PSRPLL
RSSIT
VFRM
VoINT
MCo2
MCCS2
MCCK2
MCCR1
MCCX1
MCo1
MCI1
MCCK1
MCCS0
MCo0
MCI0
MCCK0
C558
0.1u
C559
10u
D
R581
100k
C560 3p
B-BUS
70
X57-823 4/10
Q
SCHEMATIC DIAGRAM
R567
BSHIFT
1k
CN523
E12
.
E11
0.1u
E10 C565
.
L5 C566 0.1u
.
P6 C567 0.1u
.
0.1u
P11 C568
L14 C569 0.01u
H14 C570 1u
.
E13
.
E7 C572 0.1u
.
M5 C573 0.1u
.
C574 0.1u
N5
.
P9 C575 0.1u DC Switch(System)
. 0.1u Q501
P10 C576
FK330301
.
C577 0.01u
N14
M14 C578 1u
G14
D
.
F14
D
L510
E9
E8 D
B5
/SAVE
C6
B6
A6
BUCNT2
U8
R8
BUCNT1
R7
MKEYO
T7
MKEYI
V10
EMG
U9
/OVRB
V9
/INT15P
T9
C11
POWER
D12 /BINT
C12
/SYMTIM
R5
FSDET
R6
R2
P3 GLED
P2 RLED
R599
M4 33M
R1
100k
N3
N2
P1
L4
M2
GPSC
M3
N1 /DWUP
D8 /DINT
C579 0.01u
D7
C7 C580 0.01u
D10 PCB_VER
D
C8
DSP_ST
D9
/MCCSXCN
B7
HOST_RDY
C9
MCDICN
B8
MCSCKCN
A7 /MCCSAF
B10
MCDOAF
B9
MCDIAF
D11 MCSCKAF
A8
R3
D D
C680
R584
47k
0.1u
R583
100k
R580
3.3k
R
AND Gate
IC301
TC7SH08FU-F
1 INB
2 INA
3
GND
D
. . .
R702 R709 R711
MOD
2.2k 100k
100k
ASQDET
/H_L
SBC
ASTSW
. .
C702 C705
47p
1000p
/IGN
TXC
DSW
. .
R701
ASQAPC
MM
10k
MM2
/T_R
RXC
HSW
BEEP
VOICE
PLD
RXAF
IF_DET
S
TX-RX UNIT (X57-8230-1X)
IC508
TC7SH08FU-F
R568
1 INB
VCC
5
0
2 INA
VCC
3
5 GND
oUTY 4
AND Gate
oUTY 4
D
.
C706
0.1u
10
.
C718
0.1u
.
IC701
BU7462NUX
MOD SMF
(VREF)
1.65V
1 8
.
VDD
R773
2
7
+
-
0
3
6
+
-
4
5
VSS
VCO MOD/VREF
.
R722 100k
.
C723 47p
.
R738
10k
BRF/Buffer
.
AMP(SQ)
IC705
BU7242NUX
.
100p
R720
.
330k
C719
.
Q701 100p
FK330301
33A_2
SQL Noise BW Switch
LPF
8
1
VDD
7
2 .
.
- +
R706 R730
6 R724
3
+ -
82k 47k 47k
5
4 VSS
.
IC702
BU7242NUX
.
. .
C776
R772 R783
10k 150k
15k
0.039u
. . .
C808
R826 R827
82k
10k
0.068u
.
.
C746
R754
56k
0.1u
T
B-BUS
R569
0
.
R707
MIC2
1.8k
3.3V
.
C733
4.7u
B-BUS