Kenwood UBZ-LJ8 Service Manual page 32

TX-RX UNIT :CONTROL SECTION (X57-6672-70) (A/2)
RX:0V RX:0V
TX:2.468V TX:2.468V
AVR 3T SWITCH
LAMP ON:4.49V LAMP ON:4.49V
LAMP OFF:4.5V LAMP OFF:4.5V IC207 RX:2.944V RX:2.944V
RX:2.83V RX:2.83V
TK71530ASCL TX:0.082V TX:0.082V
LAMP LAMP ON:2.229V ON:2.229V 2.95V 2.95V TX:2.83V TX:2.83V
LAMP OFF:4.5V LAMP OFF:4.5V R238 2 1 3M
VIN VOUT
180 GND
3C SWITCH
3 RX:0.071V RX:0.071V
TX:0.082V TX:0.082V RX:2.872V RX:2.872V
TX:0.621V TX:0.621V
3M
3R SWITCH
RX:0.073V RX:0.073V
TX:2.948V TX:2.948V
2.893V 2.893V 2.927V 2.927V
RX:2.89V RX:2.89V
Q211
TX:2.893V TX:2.893V
DTA123JE
LAMP LED
3MS SWITCH
D205
B30-2143-05 RX:0.072V RX:0.072V
TX:0.083V TX:0.083V
LAMP LAMP ON:0.079V ON:0.079V
LAMP OFF:3.025V LAMP OFF:3.025V
LAMP LED SWITCH
Q213
DTC114EE
VOLTAGE DETECTION VOLTAGE DETECTION
C_3MS
C_3T
C_3R
49 32
C_3C SAVE S12 S12
50 31 BASEBAND IC
COMM_CLK CLK S13 S13
51 30 IC209
COMM_DATA DAT S14 S14
AK2346
52 29
AKM_DIR AKDIR S15
S15 C258 1u 1 AGNDIN 24
53 28
TEST
PLL_CS PLLE NC C259 1u 2 23
AGND
54 27 R300 1k RXIN
PLL_UNLOCK UL COM0 COM0 3 22
TXIN
R248 1k 55 26 R301 1k RXINo
UP_KEY UP COM1 R266 4 21
COM1 TXINo
R249 1k 56 MPU 25 R302 1k RXLPFo
DOWN_KEY DOWN COM2 COM2 270k 5
IC208 LIMLV 20
57 24 C261 120p
M38C24M6502HP RXAF
CTCSS_OUT QTOUT NC 6 EXTLIMIN 19
58 23 R251
R269 RXAFIN
BEEP BEEP MODE MODE_KEY C265 3.9k 7 18 C252
MOD
59 22 1k EXPOUT
MIC_MUT MICM PTT 0.1u 8 17 0.01u
PTT 1.451V 1.451V VSS
60 21 VDD
BATTL REM(TxD) 9 16
TxD TCLK
61 20 XIN
GND RxD
RxD 10 TDATA 15
62 19 R250
XOUT
VREF PWR POWER 11 D_IO 14
63 18 1k DIR
BATT 12 13
ESCL RDF_FC
64 17 SCLK
CTCSS_IN QTIN
ESDA
0
R290
3MS
EEPROM
IC210
CAT24WC01JI18
or
AT24C01A10SI18
8
3M 1
VCC A0
X201 7 2
WP A1
L77-1928-05
6 3
or SCL
A2
L77-1929-05 5 4
1.304V 1.304V 1.01V 1.01V
SDA VSS
3.633MHz
POWER PTT UP DOWN MODE
SP.ON :4.5V SP .ON :4.5V
SP SP.OFF :4.5V .OFF :4.5V SP SP.ON :3.647V .ON :3.647V
SP SP.OFF :0.014V .OFF :0.014V
INT.ON :4.5V INT .ON :4.5V AF
INT.OFF:4.5V INT .OFF:4.5V AMPLIFIER INT.ON :3.647V INT .ON :3.647V
EXT EXT. :4.49V :4.49V AVR INT INT.OFF:3.647V .OFF:3.647V
EXT. :3.633V EXT :3.633V
Q216
2SA1362(GR)
SP.ON :2.944V SP .ON :2.944V
SP.OFF :0.004V SP .OFF :0.004V
1
INT.ON :2.945V INT .ON :2.945V
INT.OFF:2.944V INT .OFF:2.944V 2
EXT EXT. :2.946V :2.946V
3
BTL_OUT
4
SP_AMP
Q220
2SC4617(S)
D209,210
AF SWITCH
3T 3T
VOLTAGE LEVEL
SHIFT DIODE
3C 3C SP_MUT
3R 3R
3MS
R271
R273 R272
4.7k 4.7k 22k
CTCSS_OUT
C254
1u
R318 R291
C247 10k 10k
120p
BEEP
CTCSS_IN
R263
LOW PASS FILTER
150k 1.437V 1.437V
IC211
NJM2100V
8
1.461V 1.461V 1 AOUT
V+
R261 680k R279
2 A-IN 7 C224 68p
R262 C253 BOUTPUT 82k
1.451V 1.451V 3 A+IN 6 R224 560k
39k 2200p B-INPUT
4 5
V-
B+INPUT
1.451V 1.451V 4 3
OUT IN(-)
2
R286 R285 R284
VSS
5 1
100k 120k 15k 2.902V 2.902V
VDD IN(+)
IC204
TC75S51F
MIC AMPLIFIER
TONE SIGNAL DETECTION MIC MUTE DIODE
D204
D202
MA742 DAN222
R227
C222
0
0.1u
3MS
R229 C295
22k 3900p
1.087V 1.087V
R230
1.041V 1.041V 180k
C226
0.478V 0.478V
0.022u Q201
2SC4738(GR)
VOX AMPLIFIER
IC202 :BD4724G IC208 :M38C24M6502HP Q200 :2SC4919
IC203 :LM4865M IC209 :AK2346 Q201 :2SC4738(GR)
IC204 :TC75S51F IC210 :AT24C01A10SI18 Q210-212,215 :DTA123JE
IC206 :BD4730G or CAT24WC01JI18 Q213 :DTC114EE
IC207 :TK71530ASCL IC211 :NJM2100V Q216 :2SC1362(GR)
Q217,218 :CPH3413
NOTES: BTL NORMAL EXT MUT
BTL_OUT 0 0 1 1
SP_MUT 0 1 0 1
(WHEN BTL_IN =LOW, SWITCH TO EXT MODE)
R298
AF AMPLIFIER
47k
TX-RX UNIT :RF SECTION (X57-6672-70) (B/2)
IC203
INTERNAL
LM4865M
SPEAKER
TONE SIGNAL DETECTION
8
VCC VO2 LV SHIELD CASE(VCO)
7 C201
D208
-VIN BYPASS
6 0.01u MA742 SP SP.ON :0.004V .ON :0.004V
Q217
HP_SEN GND SP.OFF :0.003V SP .OFF :0.003V
5 CPH3413
INT.ON :6.58V INT .ON :6.58V
DC_VOL/SW VO 1 INT.OFF:0.004V INT .OFF:0.004V
R299 EXT. :5.77V EXT :5.77V
R3 L1
10
C292 R293 47 10u
0.1u Q217-219 D2
390k
AF SWITCH 1SV270
SP.ON :2.964V SP .ON :2.964V VARIABLE
SP SP.OFF :2.963V .OFF :2.963V
CAPACITANCE
INT INT.ON :0.018V .ON :0.018V
Q218 DIODE
INT INT.OFF:2.964V .OFF:2.964V Q219 CPH3413
EXT. :0.019V EXT :0.019V 2SK1824 SP SP.ON :2.858V .ON :2.858V R4
SP.OFF :2.858V SP .OFF :2.858V
1k
R315 INT.ON :0.025V INT .ON :0.025V
330k INT.OFF:2.858V INT .OFF:2.858V RF SWITCH
EXT. :0.007V EXT :0.007V D1
AF VR
HVC131
R5
R320
47k
82 RX:2.816V RX:2.816V
TX:0.058V TX:0.058V
R294
F200 0 Q1
BATT F53-0217-05 DTC114EE
4.5V 4.5V BATT
D200
1SR154-400
SWITCH
PROTECTION CN200 CN1
DIODE 2 1 20 19
AFO
MOD B
GND CRS
TO B
GND EP
BUSY B
BUSY
GND DT
3C 3C 3R
GND CK
UL 3T
PLL_UNLOCK
UL
GND
CK GND
COMM_CLK
3T 3T 3C
MAX DEV
DT GND
COMM_DATA
3R 3R BUSY
EP GND
PLL_CS
B T0
CRS GND
RSSI
B MOD
AFO GND R24
1.2k
B
20 19 R26
2 1
3.3k
C33
0.047u
35
C35
2.2u
6.3
MIC200
C209
470p
R220 R221 L11 R25
470 1.8k
10
C220
10u
10
J200
R241
C36
330 1 PTT
R223 C290 R222 C221
MIC C37
R243
1k 0.1u 18k 0.1u C38
100
SPG
R295
REM
R242
10k 330
AFO
Q200
R228 2SC4919
10k
PROTECTION
DIODE
MIC MUTE SWITCH
2.735V 2.735V
TONE SIGNAL DETECTION MODE_KEY
D203 PTT
MA742
R233
0
C228 WRITE
FLASH
0.1u
REM(TxD)
RxD
R297
PTT
100
Q219 :2SK1824 D200 :1SR154-400
Q220 :2SC4617(S) D202 :DAN222
D203,204,208 :MA742
D205 :B30-2143-05
D206 :KDZ3.3V
D209,210 :MA2S111
RX:1.798V RX:1.798V
RX:1.889V RX:1.889V RX:0.835V RX:0.835V RX:1.794V RX:1.794V TX:1.815V TX:1.815V
TX:1.889V TX:1.889V TX:0.861V TX:0.861V
TX:1.798V TX:1.798V
C28
R16 68k
L3 C4 C12 9p RX:0.774V RX:0.774V
RX:0.765V RX:0.765V TX:0.787V TX:0.787V
3p
39n 3.5p (B) TX:0.765V TX:0.765V Q4
OSCILLATOR
Q2 2SC5108(Y) C26
2SC5066(O) C15 L10
8p 27n
Q6
RX:1.508V RX:1.508V 0.5p
2SC5108(Y) RX:1.847V RX:1.847V
TX:1.513V TX:1.513V BUFFER
TX:1.85V TX:1.85V
RF AMPLIFIER
D3
VARIABLE
CAPACITANCE
SWITCH
R9 RIPPLE FILTER
RX:2.826V RX:2.826V
100k L5 Q3 3C
TX:2.826V TX:2.826V
2SC4617(S) RX:2.056V RX:2.056V
3C TX:2.059V TX:2.059V
C25
470p
R19
RX:0.121V RX:0.121V RX:2.248V RX:2.248V 100k
TX:1.711V TX:1.711V TX:2.246V TX:2.246V C27
R13 2p
RX:2.731V RX:2.731V
TX:2.732V TX:2.732V
10k Q5
2SC5108(Y) RX:0.755V RX:0.755V
D4
TX:0.752V TX:0.752V
BUFFER
SPEED UP
3T
B
3C
3R
RECTIFIER
D11
RX:1.17V RX:1.17V
R30 RB706F-40
10k C122 R83
0.047u 270k RX:0.642V RX:0.642V
R35 C129
C17 C20
22k 3p 3p
Q13 1000p
2SC4738(GR)
R27 R28
0 0 L7 L8 NOISE AMPLIFIER
RX:0.057V RX:0.057V
12n 12n
C40
0.33u
35
2nd IF
PLL IC 450kHz
IC1
RX:2.485V RX:2.485V CF1
TB31202FN
RX:1.591V RX:1.591V
16 C134
1
FIN1 FIN2 1800p
2 15
VCC1 VCC2 R91
3 14
CP1 CP2 10
4 13
GND1 GND2
0 5 12 C133
R31 RX:1.926V RX:1.926V
LD SW
100p R32 100 6 11 470p
CK XIN
100p R33 100 7 10
DATA XOUT
100p R34 100 8 9
STB BO
DIODE
IF AMPLIFIER
RX:2.809V RX:2.809V
Q11 RX:0.715V RX:0.715V
KTC4082
C116
RX:0.929V RX:0.929V FM IC R69
IC2 0.01u
TA31136FN 820
L36
R80 R81
0 0
X1 QUAD RX:2.809V RX:2.809V
L77-1930-05 TCXO COIL
L12 21.25MHz
4.7u
OUTPUT GND
1.533V 1.533V
R74 R75 R78 3R
0 0 0
+DC VC
R37
12k
VR3
68k
TX-FREQ
3R
RX:0.145V RX:0.145V
TX:4.47V TX:4.47V TX:1.636V TX:1.636V RF SWITCH TX:0.846V TX:0.846V
TX:1.118V TX:1.118V TX:2.491V TX:2.491V
RF AMPLIFIER
L17 C70 D8 C73 L20 L21
RF AMPLIFIER C58 L14
R96
TX:0.819V TX:0.819V TX:0.62V TX:0.62V Q7 8.2n 12n 15n
470p HVC131 470p
2.2k 2SC5092 10p 6.8n
C50 L37 C150 C52
R95
TX:1.367V TX:1.367V
6.8n
10 470p 5p Q14 150p Q8
2SK3656
2SC5108(Y)
R44
R43 RF POWER AMPLIFIER
4.7k
22k
TX:2.47V TX:2.47V TX:4.47V TX:4.47V
TX:2.465V TX:2.465V
POWER
C64 C67
470p 1u
3T
B
R99 R100 C88
0 0 3p
C87
470p
RX:1.7V RX:1.7V
IF RX:2.863V RX:2.863V
RX:2.863V RX:2.863V
XF1
RF AMPLIFIER
21.7MHz R71 L41 RX:1.695V RX:1.695V RX:2.869V RX:2.869V
Q9
150n C90 R56 C94
470 Q10 R57 3SK318 RX:0.096V RX:0.096V
3SK318 RX:1.165V RX:1.165V L31 TX:0.845V TX:0.845V
100p 0 5p 0 L79-1825-05
1ST MIXER C144 L29 C101 C102
18n
4.5p 3p 470p
RX:2.87V RX:2.87V RX:0.286V RX:0.286V RX:0.118V RX:0.118V
R67
447MHz
2.2k
RF SWITCH
RX:2.869V RX:2.869V
3R
IC1 :TB31202FN Q1 :DTC114EE Q8 :2SK3656 D1 :HVC131 D10 :HSC277
IC2 :TA31136FN Q2 :2SC5066(O) Q9,10 :3SK318 D2 :1SV270 D11 :RB706F-40
Q3 :2SC4617(S) Q11 :KTC4082 D3 :1SV214
Q4-6,14 :2SC5108(Y) Q13 :2SC4738(GR) D4,5 :MA2S111
Q7 :2SC5092 D8 :HVC131
C80
1p
L22
ANT
15n
L32
4T