Kenwood UBZ-LJ8 Schematics
TX-RX UNIT :CONTROL SECTION (X57-6672-70) (A/2)
1.01V
1.304V
RX:0.145V
TX:0.846V
TX:1.636V
RX:2.863V
RX:0.096V
TX:0.845V
RX:1.165V
RX:2.869V
RX:1.695V
RX:1.7V
RX:2.863V
RX:2.87V
RX:0.118V
RX:0.286V
RX:1.798V
TX:1.815V
RX:0.774V
TX:0.787V
RX:0.755V
TX:0.752V
RX:2.248V
TX:2.246V
RX:1.794V
TX:1.798V
RX:0.765V
TX:0.765V
RX:0.835V
TX:0.861V
RX:1.508V
TX:1.513V
RX:1.889V
TX:1.889V
RX:2.826V
TX:2.826V
RX:2.056V
TX:2.059V
RX:2.731V
TX:2.732V
1.533V
2.735V
RX:1.847V
TX:1.85V
RX:0.057V
RX:1.17V
RX:0.642V
0.478V
1.087V
1.041V
2.902V
1.451V
.ON :0.004V
.OFF :0.003V
INT
.ON :6.58V
INT
.OFF:0.004V
EXT
:5.77V
.ON :2.858V
.OFF :2.858V
INT
.ON :0.025V
INT
.OFF:2.858V
EXT
:0.007V
.ON :2.964V
.OFF :2.963V
INT
.ON :0.018V
INT
.OFF:2.964V
EXT
:0.019V
.ON :3.647V
.OFF :0.014V
INT
.ON :3.647V
INT
.OFF:3.647V
EXT
:3.633V
.ON :4.5V
.OFF :4.5V
INT
.ON :4.5V
INT
.OFF:4.5V
EXT
:4.49V
.ON :2.944V
.OFF :0.004V
INT
.ON :2.945V
INT
.OFF:2.944V
EXT
:2.946V
4.5V
1.451V
1.461V
1.437V
1.451V
RX:0.121V
TX:1.711V
RX:2.816V
TX:0.058V
RX:0.715V
RX:2.809V
RX:2.809V
RX:0V
TX:2.468V
RX:2.83V
TX:2.83V
RX:2.872V
TX:0.621V
RX:2.944V
TX:0.082V
RX:2.89V
TX:2.893V
RX:0.071V
TX:0.082V
RX:0.073V
TX:2.948V
RX:0.072V
TX:0.083V
2.95V
LAMP
ON:0.079V
LAMP
OFF:3.025V
LAMP
ON:2.229V
LAMP OFF:4.5V
LAMP ON:4.49V
LAMP OFF:4.5V
2.893V
2.927V
TX:2.465V
TX:4.47V
TX:1.367V
TX:2.491V
TX:0.62V
TX:1.118V
TX:0.819V
TX:2.47V
RX:1.926V
RX:1.591V
RX:2.485V
RX:0.929V
TX:4.47V
RX:2.869V
COM2
COM1
S1S2S3
LAMP ON:4.49V
LAMP OFF:4.5V
LAMP
ON:2.229V
LAMP OFF:4.5V
LAMP LED
D205
B30-2143-05
LAMP
ON:0.079V
LAMP
OFF:3.025V
LAMP LED SWITCH
Q213
DTC114EE
C_3MS
C_3T
C_3R
C_3C
COMM_CLK
COMM_DATA
AKM_DIR
PLL_CS
PLL_UNLOCK
UP_KEY
DOWN_KEY
CTCSS_OUT
BEEP
MIC_MUT
CTCSS_IN
S6
S7S0S8
S4
S5
R238
180
R234
470p
C306
5
VCC
IC206
BD4730G
VEE1
1NC2
VOLTAGE DETECTION
49
50
51
52
53
54
55
1k
R248
R249
WRITE
56
1k
57
58
59
60
61
47k
R312
62
63
64
POWER
10k
R303
3.9k
R247
S200
POWER PTT UP DOWN MODE
S9
S11
S10
S12
220k
2.893V
C238
0.01u
4
OUT
VEE2
3
45
46
47
48
3TC
3RC
3MC
SAVE
CLK
DAT
AKDIR
PLLE
UL
UP
DOWN
QTOUT
BEEP
MICM
BATTL
GND
VREF
BATT
QTIN
S70-0434-05
LAMP
BUSY
RSSI
REM
VOX
123456789
BUSY
RSSI
1u
R296
2.2k
C307
REM
VOX
PTT
UP_KEY
COM0
S15
S14
S13
3M
1u
270k
C305
R240
390k
470p
IC202
BD4724G
C240
R239
VOLTAGE DETECTION
S0S1S2S3S4S5S6S7S8
39
40
41
42
43
44
S2S1S0
MPU
IC208
M38C24M6502HP
TUNE
OSCO
FLASH (GND)
RESET
SPM
SP AMP
10111213141516
1k
R308
WRITE
FLASH
SP_AMP
SP_MUT
R304 10k
R305 10k
MODE_KEY
R306 10k
1.304V
DOWN_KEY
EXTBTLNOTES:
SPSP.ON :4.5V
SPSP.OFF :4.5V
INT
.ON :4.5V
INT
.OFF:4.5V
EXT
. :4.49V
SPSP.ON :2.944V
SPSP.OFF :0.004V
INT
.ON :2.945V
INT
.OFF:2.944V
EXT
. :2.946V
BTL_OUT
SP_AMP
RX:0V
TX:2.468V
3C SWITCH
RX:0.071V
TX:0.082V
Q211
DTA123JE
120p
R269
3.9k
1.451V
4.7k
R314
COMM_DATA
EEPROM
IC210
CAT24WC01JI18
or
AT24C01A10SI18
VCC
WP
SCL
SDA
C_3MS
10
11
12
3T SWITCH
RX:2.944V
TX:0.082V
1
2
3
4
5
6
7
8
9
A0
A1
A2
VSS
Q212
DTA123JE
C_3R
C_3C
BASEBAND IC
IC209
AK2346
AGNDIN
TEST
AGND
RXIN
TXIN
RXINo
TXINo
RXLPFo
LIMLV
RXAF
EXTLIMIN
RXAFIN
MOD
EXPOUT
VSS
VDD
TCLK
TDATA
XOUT
D_IO
RDF_FC
SCLK
3MS
1
2
3
4
Q210
RX:2.83V
TX:2.83V
DTA123JE
Q215
RX:2.872V
TX:0.621V
DTA123JE
RX:2.89V
TX:2.893V
C_3T
1u
33k
R265
C255
C247
33k
R264
120p
24
R263
23
22
21
20
19
C252
18
17
0.01u
16
XIN
15
14
DIR
13
COMM_CLK
AKM_DIR
150k
R262
39k
1.437V
R261 680k
AVR
IC207
TK71530ASCL
2
VIN1VOUT
47k
R235
2.927V
C239
0.01u
4
5
VCC
OUT
VEE13VEE2
1NC2
S9
S10
S11
33
34
35
36
37
38
S9S8S7S6S5S4S3
S11
S10
32
S12
31
S13
30
S14
29
S15
28
NC
27
R300 1k
COM0
26
R301 1k
COM1
25
R302 1k
COM2
24
NC
R251
23
MODE
1k
22
PTT
21
TxD
20
RxD
R250
19
PWR
18
1k
ESCL
17
Xout
Vcc
C246
100
R253
X201
L77-1928-05
or
L77-1929-05
3.633MHz
470p
MJDET
BTL_IN
ESDA
BTLC
C245
BTL_OUT
1.01V
C244
1u
R290
15p
R307 10k
GND
C243
Xin
15p
GND
3
0
COM0
COM1
COM2
MODE_KEY
REM(TxD)
POWER
2.95V
3M
C237
C236
470p
47u4
3R SWITCH
RX:0.073V
TX:2.948V
3MS SWITCH
RX:0.072V
TX:0.083V
S12
S13
S14
S15
PTT
RxD
C263
1800p
C258 1u
8.2k
R267
C259 1u
R266
270k
C261
0
R270
C265
0.1u
33k
R275
C264
R310 47k
R311 47k
8200p
8
3M
7
C286
0.1u
6
5
1u
C233
C301
C300
C234
C254
C253
2200p
3T
470p
C302
3C
470p
C279 1u
3R
470p
C235 1u
3MS
1u
1u
C251
0.1u
R256
4.7k
1.451V
IC202
IC203
IC204
IC206
IC207
3T
3C
3R
150k
680p
1.461V
C277
R288
R287
100k
R286
100k
C276
0.056u
3MS
:BD4724G
:LM4865M
:TC75S51F
:BD4730G
:TK71530ASCL
LOW PASS FILTER
IC211
NJM2100V
1
AOUT
2
A-IN
BOUTPUT
3
A+IN
B-INPUT
4
V-
B+INPUT
R285
120k
C273
C275
0.022u
IC208
IC209
IC210
IC211
CTCSS_IN
8
V+
R279
7
82k
6
5
R284
15k
0.047u
:M38C24M6502HP
:AK2346
:AT24C01A10SI18
or CAT24WC01JI18
:NJM2100V
R278
33k
R281
15k
0.047u
C272
SP_MUT
CTCSS_OUT
BEEP
1.451V
2.902V
AF
AMPLIFIER
AVR
2SA1362(GR)
2.7k
R321
Q220
2SC4617(S)
AF SWITCH
R273
4.7k
R318
10k
C224
R224
4
OUT
5
VDD
IC204
TC75S51F
MIC AMPLIFIER
C222
0.1u
R229
22k
1.041V
C226
0.022u
Q200
Q201
Q210-212,215
Q213 :DTC114EE
Q216 :2SC1362(GR)
Q217,218 :CPH3413
Q216
D209
1k
R316
VOLTAGE LEVEL
SHIFT DIODE
R272
4.7k
0.1u
C267
5.6k
R292
68p
560k
IN(-)
VSS
IN(+)
D204
MA742
Q201
2SC4738(GR)
VOX AMPLIFIER
SPSP.ON :3.647V
SPSP.OFF :0.014V
INT
INT
EXT
C211
MA2S111
D210
D209,210
0.1u
C266
C288
1000p
3
2
1
R227
C295
3900p
R230
180k
.ON :3.647V
.OFF:3.647V
. :3.633V
470p
C212
MA2S111
1.2k
R274
R291
10k
0
C225
R231
1
2
10u10
3
4
R271
22k
22k
R319
C249
0.047u
C248
0.047u
47k
R257
MIC MUTE DIODETONE SIGNAL DETECTION
D202
DAN222
4
2.2u
MIC_MUT
1.087V
0.478V
1u
5.6k
C227
:2SC4919
:2SC4738(GR)
:DTA123JE
AF AMPLIFIER
IC203
LM4865M
VCC
BYPASS
-VIN
HP_SEN
DC_VOL/SW VO 1
C208
0.1u
3C
3T
3R
R220
R228
10k
TONE SIGNAL DETECTION
C228
0.1u
8
VO2
C201
7
6
0.01u
GND
5
R299
C292
0.1u
SPSP.ON :2.964V
SPSP.OFF :2.963V
INT
.ON :0.018V
INT
.OFF:2.964V
EXT
. :0.019V
470
C220
10u
10
Q200
2SC4919
MIC MUTE SWITCH
D203
MA742
Q219 :2SK1824
Q220 :2SC4617(S)
C294
0.01u
10
BUSY
PLL_UNLOCK
COMM_CLK
COMM_DATA
PLL_CS
RSSI
R221
1.8k
C229
BTL_OUT
(WHEN BTL_IN =LOW, SWITCH TO EXT MODE)
R298
47k
TONE SIGNAL DETECTION
D208
MA742
Q217
CPH3413
R293
390k
C293
2200p
Q219
2SK1824
R315
330k
C304
R320
82
BATT
C210
1000p
C221C290 R222R223
0.1u0.1u 18k1k
R295
10k
C241
470p
PROTECTION
DIODE
PTT
VOX
R233
0
1M
0.1u
R232
NORMAL
0
SPSP.ON :0.004V
SPSP.OFF :0.003V
INT
.ON :6.58V
INT
.OFF:0.004V
EXT
. :5.77V
Q217-219
AF SWITCH
C303
0.01u
Q218
CPH3413
0.01u
F200
F53-0217-05
D200
1SR154-400
PROTECTION
DIODE
R241
330
R243
100
R242
330
470p
C299
D206
C242
470p
KDZ3.3V
REM
MODE_KEY
PTT
WRITE
FLASH
REM(TxD)
RxD
PTT
D200
D202
D203,204,208
D205
D206
D209,210 :MA2S111
10
C206
100u6.3
SPSP.ON :2.858V
SPSP.OFF :2.858V
INT
.ON :0.025V
INT
.OFF:2.858V
EXT
. :0.007V
4.5V
MOD
TO
BUSY
3C
UL
CK
DT
EP
CRS
AFO
5.6k
R289
C296
470p
C298
470p
C297
0
R202
BTL_IN
R297
100
:1SR154-400
:DAN222
:MA742
:B30-2143-05
:KDZ3.3V
R294
R317
MUT
0
GND
GND
GND
GND
GND
3T
3R
C209
470p
0.068u
100k
1
1SP_MUT 100
INTERNAL
SPEAKER
AF VR
VR201
BATT
CN200
2
1
B
B
B
19
20
MIC200
J200
PTT
1
MIC
SPG
REM
AFO
I/O PORT
MPU FLASH-ROM
TX-RX UNIT :RF SECTION (X57-6672-70) (B/2)
LV
SHIELD CASE(VCO)
R1
CN1
10k
20
19
AFO
B
CRS
B
EP
B
DT
3R
CK
3T
UL
GND
3C
GND
BUSY
GND
T0
GND
MOD
GND
2
1
L1
R3
47
10u
D2
1SV270
VARIABLE
CAPACITANCE
L2
C2
6.8n
470p
DIODE
R4
1k
RF SWITCH
D1
R2
1k
HVC131
R5
47k
RX:2.816V
TX:0.058V
Q1
DTC114EE
C3
470p
SWITCH
1u
C141
C140
0.047u
C32
100p
L11
1000p
C33
C142
C143
1000p
35
C34
R24
1.2k
R25
10
1000p
R26
3.3k
C35
2.2u
6.3
2.735V
10u 10
MAX DEV
R270R28
0.33u
10
C39
10u
C36 100p
C37 100p
C38 100p
C44
C40
35
C41
L12
4.7u
8p
RX:0.121V
TX:1.711V
VR1
47k
47p
DIODE
C46
C45
L3
39n
3.5p
D3
VARIABLE
CAPACITANCE
SWITCH
C5
R30
10k
R35
22k
0
D5
MA2S111
R29
C42
L77-1930-05
8p
+DC
VR3
68k
TX-FREQ
33p
C47
470p
C4
(B)
470p
C6
R6
R31
R32 100
R33 100
R34 100
56k
1000p
X1
21.25MHz
L21
15n
5p
C79
RX:0.096V
TX:0.845V
D10
HSC277
RF SWITCH
C80
1p
L22
15n
5p
5p
C103
ANT
1p
C81
L32
4T
5p
C105
RX:0.145V
TX:1.636V
TX:4.47V
C88R100R99
470p
R56
R46
3p
C87
0
TX:1.367V
10k
R47 12k
C148
RX:2.869V
L14
6.8n
22p
100p
C94
C93 470p
Q8
2SK3656
RF POWER AMPLIFIER
0.1u
C61
C60
470p
C147
L26
22n
RX:2.863V
RF AMPLIFIER
R57
5p
0
L27
20n
RX:0.118V
L28
D1
:HVC131
D2
:1SV270
:1SV214
D3
:MA2S111
D4,5
:HVC131
D8
C62
C63 0.1u
C65 470p
C64
470p
Q9
3SK318
C96 470p
R58 27
TX:2.491V
TX:1.118V
RF AMPLIFIER
TX:0.62V
C52
150p
0
R43
L38
27n
R97
L41
150n
1u
R67
2.2k
470p
R98
C108
100
RX:0.286V
22k
Q10
3SK318
1ST MIXER
82
47p
R68
:2SC5066(O)
:2SC4617(S)
:2SC5108(Y)
470p
C53
C109
IF
Q7
2SC5092
R44
4.7k
RX:1.7V
RX:1.695V
C110
0.01u
470p
RX:1.798V
Q6
3C
C27
2p
RX:0.755V
TX:0.752V
C117
0.01u
3R
TX:1.815V
R22
IF AMPLIFIER
Q11
KTC4082
L35
1.5u
RX:2.809V
100
R72
L10
27n
RX:1.847V
TX:1.85V
C29
220
C30
470p
R73
330k
C28
3p
470p
C31
1800p
RX:0.715V
R69
820
3R
R95
10
IC1
IC2
470p
3R
6.8n
4p
C146
XF1
21.7MHz
C112
:TB31202FN
:TA31136FN
L37
C50
RX:0.835V
R13
D11
C130
R88
C131
C132
10k
L6
C13 11p
R15
RX:0.057V
470p
C133
470p
680
470p
RX:0.929V
470p
R74
0
RX:0.765V
TX:0.765V
10u
220
3C
C124
RX:1.17V
C122
0.047u
TX:0.861V
C15
0.5p
RX:2.826V
TX:2.826V
R14 4.7k
SPEED UP
1000p
C125
1000p
RX:2.485V
C134
1800p
R89
AFOUT
9
R87
47k
R90
R16 68k
Q4
2SC5108(Y)
BUFFER
C19
470p
RIPPLE FILTER
Q3
2SC4617(S)
D4
MA2S111
C16 470p
RX:2.731V
TX:2.732V
D4
R82
4.7k
R83
RX:0.642V
270k
Q13
2SC4738(GR)
NOISE AMPLIFIER
R84
150
C127
0.033u
2nd IF
450kHz
CF1
330k
IFIN
VCC
DEC
FILIN
FILOUT
QUAD
IFOUT
RSSI
N-DET
10111213141516
FM IC
C135
27p(J)
TA31136FN
3.3k
R92
15K
0.1u
C136
R75
R78
0
0
C22
22u 6.3
C129
1000p
MIXOUT
N-REC
IC2
2345678
GND
L36
QUAD
COIL
L9
22n
R17
100
RX:2.056V
TX:2.059V
RX:2.248V
TX:2.246V
2SC5108(Y)
1
OSCIN
OSCOUT
MIXIN
RX:1.794V
TX:1.798V
C26
8p
C25
470p
Q5
BUFFER
RX:1.591V
C138
10u 10
RX:0.774V
TX:0.787V
R20 18k
R18
220
3T
B
3C
3R
R91
10
2SC5108(Y)
RF AMPLIFIER
R21 15k
R19
100k
RX:1.926V
RX:2.809V
C114
1000p
C115
10u 10
C116
0.01u
RX:1.889V
TX:1.889V
C7
L4
0.5p
10u
3p
R11
1.5k
C9
D3
47
R10
R7
47k
R9
100k
R8
47k
1u
0
C17
3p
L7
12n
5p
C14
1
2
3
4
0
5
6
7
8
C43
100p
TCXO
GNDOUTPUT
VC
R37
12k
1SV214
C8
8p
C18
PLL IC
IC1
TB31202FN
VCC1
CP1
GND1
LD
CK
DATA
STB
R80
0
1.533V
R38
12n
470p
C20
L8
27k
3p
VCC2
GND2
XOUT
R12
8.2k
5p
C23
16
FIN2FIN1
15
14
CP2
13
12
SW
11
XIN
10
9
BO
R81
0
C12
OSCILLATOR
RX:1.508V
TX:1.513V
L5
9p
2SC5066(O)
C10
RECTIFIER
RB706F-40
150kR77
C118 0.22u
R86
1.2k
R85
4.7k
C128
1800p
Q2
470p
TX:0.819V
3T
B
15p
C149
RF AMPLIFIER
R96
2.2k
C150
5p
Q14
2SC5108(Y)
7p
RX:2.863V
R71
470
3p
L34
C113
RX:2.87V
L33
C107
C106
0.01u
Q1 :DTC114EE
Q2
Q3
Q4-6,14
Q7 :2SC5092
C58
10p
7p
C55
L13
10n
TX:2.47V
VR4
C57 0.1u
C152 22p
POWER
0
0
R52
100k
R54
100k
Q8 :2SK3656
Q9,10 :3SK318
Q11 :KTC4082
Q13 :2SC4738(GR)
68k
R53
C90
100p
68k
R55
C89
470p
30p
C59
22k
RX:2.869V
L17
8.2n
30p
L15
TX:4.47V
1u
L16
C66
C67
1u
470p
27k
C98
R60
C99 470p
R59 68k
D10
D11 :RB706F-40
RX:1.165V
C144
4.5p
100k
R61
:HSC277
C68
22p
C153
470p
C70
18p
L18
C71 470p
L29
18n
RF SWITCH
D8
HVC131
220n
220
R50
R51 220
C101
3p
L30
18n
TX:0.846V
470p
TX:2.465V
L79-1825-05
1M
R64
447MHz
L20
C73
12n
4p
C75
C77
L31
C102
470p
1M
R65
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