Schematic Diagram - Kenwood UBZ-LJ8 Service Manual

A
UBZ-LJ8
TX-RX UNIT :CONTROL SECTION (X57-6672-70) (A/2)
1
2
LAMP ON:4.49V LAMP ON:4.49V
LAMP OFF:4.5V LAMP OFF:4.5V
LAMP ON:2.229V LAMP ON:2.229V
R238
LAMP OFF:4.5V LAMP OFF:4.5V
180
LAMP LED
D205
3
B30-2143-05
LAMP ON:0.079V LAMP ON:0.079V
LAMP OFF:3.025V LAMP OFF:3.025V
LAMP LED SWITCH
Q213
DTC114EE
VOLTAGE
C_3MS
C_3T
4
C_3R
C_3C
COMM_CLK
COMM_DATA
AKM_DIR
PLL_CS
PLL_UNLOCK
1k
R248
UP_KEY
R249 1k
DOWN_KEY
CTCSS_OUT
BEEP
MIC_MUT
5
CTCSS_IN
6
7
POWER
26
X57-667 1/4
B

SCHEMATIC DIAGRAM

3M
2.893V 2.893V
DETECTION VOLTAGE DETECTION
49
SAVE
50
CLK
51
DAT
52
AKDIR
53
PLLE
54
UL
55
UP
MPU
56
DOWN
IC208
57
QTOUT M38C24M6502HP
58
BEEP
59
MICM
60
BATTL
61
GND
62
VREF
63
BATT
64
QTIN
L77-1928-05
L77-1929-05
1.304V 1.304V
PTT UP DOWN MODE
C
AVR
IC207
TK71530ASCL
2.95V 2.95V
2 1
3M
VIN VOUT
GND
3
2.927V 2.927V
32
S12 S12
31
S13
S13
30
S14 S14
29
S15
S15
28
NC
27 R300 1k
COM0
COM0
26
R301 1k
COM1
COM1
25 R302 1k
COM2 COM2
24
NC
R251
23
MODE_KEY
MODE
22 1k
PTT
PTT
21
REM(TxD)
TxD
20
RxD
RxD
R250
19
POWER
PWR
18 1k
ESCL
17
ESDA
R290 0
X201
or
1.01V 1.01V
3.633MHz
D
RX:0V RX:0V
TX:2.468V TX:2.468V
3T SWITCH
RX:2.944V RX:2.944V
RX:2.83V RX:2.83V
TX:0.082V TX:0.082V
TX:2.83V TX:2.83V
3C SWITCH
RX:0.071V RX:0.071V
TX:0.082V TX:0.082V RX:2.872V RX:2.872V
TX:0.621V TX:0.621V
3R SWITCH
RX:0.073V RX:0.073V
TX:2.948V TX:2.948V
RX:2.89V RX:2.89V
Q211
TX:2.893V TX:2.893V
DTA123JE
3MS SWITCH
RX:0.072V RX:0.072V
TX:0.083V TX:0.083V
BASEBAND IC
IC209
AK2346
1
24
C258 1u
AGNDIN
TEST
2 23
C259 1u
AGND
RXIN
3
22
TXIN
RXINo
R266 4 21
TXINo
RXLPFo
270k
5
20
LIMLV
C261 120p
RXAF
6 19
EXTLIMIN
R269
RXAFIN
C265
7 18 C252
3.9k
MOD
EXPOUT
0.1u 8 17 0.01u
VSS
1.451V 1.451V
VDD
9 16
TCLK
XIN
10
15
TDATA
XOUT
11 14
D_IO
DIR
12
13
RDF_FC
SCLK
3MS
EEPROM
IC210
CAT24WC01JI18
or
AT24C01A10SI18
8
1
3M
VCC A0
7 2
WP A1
6 3
SCL A2
5 4
SDA VSS
E
3T
3C
3R
3MS
C254
1u
C247
120p
R263
1.437V 1.437V
150k
R261 680k
C253
R262
2200p
39k