Kenwood NX-820 Service Manual page 108

P
NX-820
B-BUS
FSX0
CLKX0
X 501
18.423MHz
L7 7- 3015- 05
3
oUTPUT
GND
2
4 R567
VCC
VC
1
1k
C543
0.1u
D
E 1 2
DGND2
E 1 1
DGND1
E10
DVDIo7
L5
DVDIo6
P6
DVDIo5
P11
DVDIo4
L1 4
DVDIo3
H14
DVDIo2
E13
DVDIo1
E7
DVDD10
M5
DVDD9
N5
DVDD8
P9
DVDD7
P10
DVDD6
N14
DVDD5
M14
DVDD4
G 14
DVDD3
F1 4
DVDD2
E9
DVDD1
E8
GPIo11
B5
GPIo10
C 6
GPIo9
B 6
GPIo8
A 6
GPIo7
U 8
GPIo6
R 8
GPIo5
R 7
GPIo4
T7
GPIo3
V10
GPIo2
U9
ASIC
GPIo1
V9
IC 507
GPIo0
T9
SIMRST
C11
SIMCK
D12
SIMDT
C12
SYMTIM
R5
FSDET
R6
TXRVE
R2
TRAMP
P3
TMoD
P2
PSTPA
M4
PSTIF
R1
PSTPLL
N3
RXRVE
N2
RXSLT
P1
PSRRF
L4
PSRIF
M2
PSRPLL
M3
RSSIT
N1
VFRM
D8
VoINT
D7
MCo2
C7
MCCS2
D10
MCCK2
C8
MCCR1
D9
MCCX1
B7
MCo1
C9
MCI1
B8
MCCK1
A7
MCCS0
B10
MCo0
B9
MCI0
D11
MCCK0
A8
R3
C558
0 . 1 u
C559
10 u
D
R581
100k
C560 3p
R583
R580
B-BUS
108
X57-824 4/10
Q
SCHEMATIC DIAGRAM / 原理图
CN523
.
C565 0.1u
.
C566 0.1u
.
C567 0.1u
.
C568 0.1u
C569 0.01u
C570 1u
.
.
C572 0.1u
.
C573 0.1u
.
C574 0.1u
.
C575 0.1u DC Switch(System)
.
C576 0.1u
Q5 01
.
C577 0.01u
F K3 3 03 01
C578 1u
.
D
D
L5 10
D
SBC
/SAVE
BUCNT2
BUCNT1
MKEYO
MKEYI
EMG
/OVRB
/INT15P
/IGN
POWER
/BINT
/SYMTIM
FSDET
TXC
GLED
RLED
33M
R 59 9
1 00 k MM
MM2
RXC
/DWUP
/DINT
C579 0.01u
M_MODEL
C580 0.01u
PCB_VER
D
DSP_ST
/MCCSXCN
HOST_RDY
MCDICN
MCSCKCN
/MCCSAF
MCDOAF
MCDIAF
MCSCKAF
D D
C 6 8 0
R 5 8 4
47 k 0. 1 u
100k
3.3k
R S
1 INB
VCC
2
SCK1 INA
3
GND
oUTY
AND Gate
D
I C3 0 1
TC 7S H0 8FU -F
/PCS
MIC
MOD SMF
. .
.
R702 R709
R711
MOD
2.2k 100k 100k
/H_L
ASTSW
ASQDET
DSW
/T_R
.
.
HSW
SQL Noise
C705 BW Switch
C702
47p
1000p
FK 33 0 30 1
. .
R701 R706
ASQAPC
82k
10k
PLD
. .
BEEP R772 R776
15k 10k
IF_DET
VOICE
RXAF
T
TX-RX UNIT (X57-8240-13)
I C5 0 8
TC7 SH0 8 FU-F
R568
1 INB
5
VCC
5
0
2 INA
R569
3
GND
4
oUTY 4
0
AND Gate
D
.
.
C706
R707
1.8k
0.1u 10
.
(VREF)
1.65V
C718 0.1u
1 .
VDD
8
R773
2
- +
7
0
3
+ -
6
4 VSS
5
.
VCO MOD/VREF
IC 70 1
B U7 46 2 NUX
.
R722
.
100k
.
C723
R738
47p
10k
.
I C 70 5
B U7 24 2 NU X
.
BRF/Buffer AMP(SQ)
C716
.
100p
. R720
330k
C719
.
100p
33A_2
Q701
DEO Buff
1
VDD
8
.
2 . .
- +
7
C733
R724 R730
3
+ -
6
47k 47k
4.7u
4
VSS
5
.
I C7 02
BU 72 4 2 NUX
LPF(APC/DMO)
.
.
C776
R783
0.039u 150k
. . .
R826 C808 R827
10k
0.068u 82k
. .
C746 R754
0.1u 56k
B-BUS
B-BUS