Wouxun KG-UV920R, Руководство по обслуживанию, Страница: 1 / 38

1
Twin Band Mobile Radio Service Manual
1 2 3 4
A
B
C
D
4 3 2 1
D
C
B
A
U/V
SW RF
AMP
RF
AMP
RF
AMP
RF
AMP
8T-U BATTo
D338,D339,D326
U512
CMX138
DQT-U
15U36
5V
DCS-U
LPF
TX/RX-U
VCO
Ripple
Filter
5C-U
RF
AMP
BUFF
AMP
RF
AMP
T/R
SW
5C-U
5C-U
5R-U 8T-U
1st
MIXER
BPF
RF
AMP
BPF
5R-U
TUNE
MCF
IF
AMP
29.25MHz
5R-V
CF 450KHz
FM IF
TA31136F
x2
5V
28.8MHz
5R-V
ANSQL
DEV-V
5M
24C64
VOICE
5V
5V
CLK
DATA
CLK
WP
5V
MOD-U
MUTE
SW
DC
SW
BATT
DC
SW
DC
SW
BATT
P_SPK2
CR111
U111
T115
T133 T116
T132
T117 D121,D142 T139 T140
T325 T326
D332,T332,T329
T539
T537
FL521,FL522 T520
T736
T734
T735
11.0592MHZ
450KHz
PHONE
JACK
JK713
CPU
U912
U725
U729
T114
SP714
Do-U
Fin-U
5C-U
U/V
SW
BPF
RF
AMP
BPF
RF
AMP
T/R
SW
5C-V 5R-V 8T-V
1st
MIXER
BPF
RF
AMP
BPF
5R-V
TUNE
T120
D122,D144
T138
T540
LPF
5R-V
LPF
T/RX-U
VCO
Ripple
Filter
5C-V
RF
AMP
BUFF
AMP
5C-V
MOD-V
T118
T134 T119
T121
Do-U
Fin-U
5C-V
T238
U512
4V
RF
AMP
FM
RADIO
5V
DATA
CLK
AF
DATA
BUSY
MCF
IF
AMP
38.85MHz
5R-U
CF
450KHz
FM IF
TA31136F
38.4MHz
5R-U
SQL-U
DEV-U
FL519,FL520
T527
450KHz
U512
15U36
5V
PL
L
-C
L
K
P
LL-
LE
-V
CR114
U114
19.2MHz
DC
SW
SW-10
TCXO-U
T112
SW
D330
U/V RF
AMP
T331
Multi-AF
SW
T327 T328 D331
U/V
U/V
SW
rectifier
D341 T336
compare
AMP
rectifier
APC
LPF
LPF
D329
SW-2
IC312
LPF
D342
LPF
BATT 8T-U 8T-V
8T-U 8T-V
D333,D334,T334
8V
D527,D528,D327
D335,T333,T330
D336,D337,T335
5R-U
DCS-V
19.2MHz
DC
SW
SW-1
TCXO-V
T113
PL
L
-D
a
ta
P
LL-
C
L
K
PL
L
-L
E-
U
P
LL-
D
a
ta
8T-V 8T-V
5V
32.768KHz
SW
T501
TX-U
TXCO-U 138-CLK
138-Rdata 138-CSN-U
138-DATA
6.144MHz
AMP
1/2V
U523
MOD-U
SQL-U
AMP
U522
MIC
DEV-U
AFi-U
U518
MT8870
DTMF-TOE-U
Q1
Q4
DTMF-STD-U
Q2
Q3
5V
DEV-U AMP
U522
3.58MHz
5R-U
U460
CMX138
DQT-V
4V
TX-V
TXCO-V
138-CLK
138-Rdata
138-CSN-V
138-DATA 6.144MHz
AMP
4V
U523
MOD-V
SQL-V
AMP
U523
MIC
DEV-V
AFi-V
U519
MT8870
DTMF-TOE-V
Q1
Q4
DTMF-STD-V
Q2
Q3
5V
DEV-V AMP
U523
3.58MHz
1/2V
1/2V
U460
CMX138
AFi-V
5V
M62363FP-CLK
M62363FP-LD
M62363FP-Data
SW
SW714
MOD-V
MOD-U
SW-8
DTMF-V
MOD-V
APC
AFo-V
AFi-V
TUNE-V
AFo-U
AFi-U
TUNE-U
DTMF-U
AFi-U
SW
SW713
SW-11
RXo
SW
SW714
SW-13
SW
SW713
SW-15
RXo
RXo
RXi
RXD
TXD
中转接口
有线复制接口
写频接口
PHONE
JACK
JK714
SP713
L4600
U742
STANDBY SW
T737
BATT
5V
P-SPK1
SW
T738
5V
Filter
AFo-V
SW
SW714
SW-14
AFo-U
SW
SW713
SW-16
TA7368P
U730
T732
8V
POWER
CS
控制面板接口
MOD-U
Multi-AF
HT9200
5V
CLK
DATA
U724
Multi-AF
3.58MHz
SW
SW714
SW-13
SW
SW713
SW-15
Multi-AF FM-AF/DTMF/VOICE
DC
SW
POWER
BATTo
T818,T825
BATT
8V
U812
Regulator
8V
U811
Regulator
5V
DC
SW
DC
SW
8T-U
TX-U
TX-V
8T-V
T819 T812
T820 T811
8V
5V
5R-U
DC
SW
DC
SW
5R-V
RX-V
RX-V
5C-V
T816 T822
T817 T823
5V
RX-U
DC
SW
T814 T821
5V
5V
DC
SW TX-U
5C-U
T815 T824
TX-V
RX-U
DC
SW
FAN
BATT
FAN
JP812
DATA
CLK
BATT
CLK
MIC
AFo
4V
5V
U733
Regulator
U781
74HC595
5V
SW-1
SW-4
SW-3
SW-2
SW-5
SW-8
SW-7
SW-6
U781
74HC595
5V
SW-10
SW-13
SW-12
SW-11
SW-14
RX-V
SW-16
SW-15
Q7
STcp
Ds
SHcp
STcp
SHcp
5V
BATT
DET
BATT Test
P-SPK1 FAN
138-Data
138-CSN-U
DTMF-TOE_U
138-CSN-V
FM-SCLK
FM-Data
ROM-CLK
Voice-CLK
Filter
CLK-PLL/DAC
Data-PLL/DAC 138-CLK
PLL_LE-V
PLL_LE-U
DAC-LD
595-STcp
MCU-CS
TXD
TEM
RXD
Voice-BUSY
MCU-CLK
MCU-DATA
Voice-Data
DTMF-STD_V
Q1
DTMF-STD_U
Q2
Q3
Q4
RX-U
HT9200-Data
138-RData
P-SPK2
DTMF-TOE_V
ROM-Data
ROM-WP
HT9200-CLK
BATT Test
595-Ds
595-SHcp
TEMP
DET
TEMP
5V
BATT
U752
8V
rectifier
D340
I Structure of Frequency
This model uses twice frequency conversion. For UHF band, the 1
st
IF is 38.85MHz, and the 2
nd
IF is
455KHz; For VHF band, the 1
st
IF is 29.95MHz, and the 2
nd
IF is 450KHz.The 1st local oscillations is
provided by PLL circuit. PLL circuit is also produced the necessary transmitting frequencies(see Chart
I). A, B, C, D frequency points of Chart I are as followings:
Chart I
Structure of
Frequency
A C B D
（
1
）
136~174.995MHz 165.250~204.245MHz 400~470.995MHz 429.25~500.245MHz
（
2
）
136~174.995MHz 165.250~204.245MHz 450~520.995MHz 479.25~550.245MHz
（
3
）
136~174.995MHz 165.250~204.245MHz 245~245.995MHz 274.25~275.245MHz
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