Kenwood NXR-800 Service Manual Supplement page 122

DSP_RS
D3
u
D2
C283
0.1u
AND GATE
IC38
TC7SET08FU-F
4 3
oUTY GND
2
INA
5 1
VCC INB
R302
100k
H
SCHEMATIC DIAGRAM
Note : The components marked with a dot (•) are parts of layer 1.
mV:AC voltage value measured with an electronic voltmeter.
The unit is mVrms.
V:DC voltage value
rms:60% modulation TX signal or RX signal
Audible signal:Measures it by 1kHz
Sub audible signal:Measures it by 100Hz
R409
0
BUFFER
IC39
TC7SH125FU-F
PAG_SW 1 5
R389
G VCC
2
INA
0
3 4
GND oUTY
C345 0.1u
SDA R316
SCL R317
TX_TEMP_PRT R318
TX_ANT_SW R319
TX_DDS_EN R320
VR_EN R321
TX_PLL_440_EN R322
TX_PLL_132_EN R323
TX_PLL_440_CE R324
TX_PLL_132_CE R325
TX_LDT R326
TX_2DA_EN R338
TX_3DA_EN R327
TX_2DA_CE R328
SR_oE R329
TX_8AD_EN R330
SR_EN R331
TX_SDi1 R332
SR_DATA R333
TX_SCLK1 R334
SR_CLK R335
TX_SDo1 R336
R337
0
50MPU
SDA
SCL
RX_8AD_EN
RX_iF_BW2
RX_iF_BW1
CN69
0
R390
105mV FOR MIC TA
25mV FOR TD
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R391
5.0V
R392
R361 0
R362 0
STANDARD DEVIATION RX:100mV
FM WIDE/NARROW
R363 0
R364 0
R374 0
I
NXR-800
CN56
1
GND
2
GND
3
PAG
4
GND
5
CoNT_5.0V
6
D_GND
7
CoNT_5.0V
8
D_GND
9
SDA
10
0 D_GND
11
SCK
12
TEMP_PRT
13
ANT_SW
14
DDS_EN
15
VR_EN
16
440_EN
17
132_EN
18
440_CE
19
132_CE
20
LDT
21
2DA_EN
22
3DA_EN
23
2DA_CE
24
SR_Eo
25
8AD_EN
26
SR_EN
27
SDi1
28
SDo0
29
SCLK1
30
SCLK0
31
SDo1
32
GND
33
MoD
34
WP
35
GND
36
GND
0 CN57
1
GND
2
0 GND
3
WP
4
D_GND
5
E2PRoM_SDA
6
CoNT_5.0V
7
E2PRoM_SCL
8
D_GND
9
AD_CS
10
iF_BW_SW
11
AD_DAT_WRiTE
12
NC(iF_NW_SW)
13
AD_CLK
14
GND
1
2
3