Service Manuals, User Guides, Schematic Diagrams or docs for : Kenwood FM Transceiver FM Transceiver Kenwood UBZ-LJ8 B51-8644-00-SDP
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A B C D E
UBZ-LJ8
TX-RX UNIT :CONTROL SECTION (X57-6672-70) (A/2)
SCHEMATIC DIAGRAM
1
COM0
COM1
COM2
S10
S11
S12
S13
S14
S15
S0
S1
S2
S3
S4
S5
S6
S7
S8
S9
RX:0V
TX:2.468V
2 3T
C233 1u
DTA123JE
AVR 3T SWITCH
C302
LAMP ON:4.49V
470p
Q210
LAMP OFF:4.5V IC207 RX:2.944V
TK71530ASCL RX:2.83V
TX:0.082V
LAMP ON:2.229V 2.95V TX:2.83V
LAMP OFF:4.5V R238 2 1 3M 3C
VIN VOUT
1u
180 GND 3C SWITCH
C237
DTA123JE
C236
470p
47u4
C301
470p
Q215
3 RX:0.071V
C279
TX:0.082V RX:2.872V
TX:0.621V
3M 3R
C235 1u
3R SWITCH
C300
470p
DTA123JE
R235
R234
220k
47k RX:0.073V
Q212
TX:2.948V
2.893V 2.927V
Q211 RX:2.89V
DTA123JE TX:2.893V
0.01u
C305
C238
270k
3MS
470p
R240
C306
C239
0.01u
1u
LAMP LED
3MS SWITCH
D205
3
5
4
RX:0.072V
5
4
B30-2143-05
C234
TX:0.083V
1u
VCC
OUT
VCC
OUT
390k
470p
BD4730G
BD4724G
LAMP ON:0.079V
IC206
LAMP OFF:3.025V
IC202
VEE1
VEE2
VEE1
VEE2
NC
C240
NC
R239
LAMP LED SWITCH
1
2
3
1
2
3
Q213
DTC114EE
VOLTAGE DETECTION VOLTAGE DETECTION
C_3MS
C_3R
C_3C
C_3T
C_3MS
S0
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
C_3T
4
C_3R
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
C254
3RC
3TC
3MC
LAMP
S0
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
R265
1u
C255
33k
1u
49 32
C251
C_3C SAVE S12 S12
0.1u
50 31
1800p
BASEBAND IC
C263
COMM_CLK CLK S13 S13
51 30 IC209
R264
R256
COMM_DATA DAT S14
33k
S14 AK2346 C247
4.7k
52 29 120p
AKM_DIR AKDIR S15 S15 C258 1u 1 AGNDIN 24
R267
8.2k
53 28 TEST
PLL_CS PLLE NC C259 1u 2 AGND 23 R263
54 27 R300 1k RXIN
PLL_UNLOCK UL COM0 COM0 3 TXIN 22 150k 1.437V
R248 1k 55 26 R301 1k RXINo
UP_KEY UP COM1 COM1 R266 4 TXINo 21
R249 1k 56 MPU 25 R302 1k RXLPFo
DOWN_KEY DOWN COM2 COM2 270k 5 LIMLV 20
IC208
57 24 C261 120p
R270
QTOUT M38C24M6502HP RXAF
CTCSS_OUT NC 6 EXTLIMIN 19 R261 680k
0
58 23 R251 R269 RXAFIN
BEEP BEEP
MODE MODE_KEY C265 3.9k 7 MOD 18 C252 R262 C253
59 22 1k EXPOUT
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