Kenwood NX-800 Service Manual page 146

CC
NX-800
8.00V
80C
TX/RX LED
TX/RX LED (BUSY)
(TX)
Q905 Q906
R :0V R : 5.00V
RT1N141U RT1N141U
T : 5.00V T : 0V
-T111 -T111
R :0V R :1.98V
T : 1.86V T : 0V 4.99V
TX/RX
LED
R919
10k
IC903
XC6209B502PR
8.00V 7.87V
R918
4 3
VIN CE
10
2
VSS
5 1
VoUT NC
5.02V
15
80C
5C
C919
1000p
C918 R913
0.1u 82k R915
47k
/PRST
5C
TXD
RXD
C917
0.1u
IC901
TC7W66FK-F
1 8
IN oUT1 VCC
2 7
oUT IN1 CoNT1
3 6
CoNT2 oUT_IN2
4 5
GND IN_oUT2
SSM3K15TE(F)
AFO/BLC SW
R905
1k
DM/KVL
HK/RXD
PTT/TXDO R906
330
146
X54-368 2/3
CD
SCHEMATIC DIAGRAM /
7.97V
Q910
12A02CH
LCD
7.27V
BACK
LIGHT
SW
D915-926
LCD
BACK LIGHT
Q908
RT1N141U-T111
0.76V
5C
BLC1 0V
GREEN
RED DIMM
16
L903
VOLTAGE
REGULATOR
(5C)
VOLTAGE
REGULATOR (33C)
15
AF BUFFER AMP
(AFO)
IC902
TC75S51FE(F)
5.02V
1 IN+ 5
VDD
2
VSS
3 4
IN- oUT
D910
REVERSE CURRENT
PREVENTION(HK/RXD)
5C
5.02V
ON HOOK
: 0V
Q902 Q904
RT1N441U RT1N441U
-T111 -T111
Q901
AFO SW
HK/RXD0 SW
CE
原理图
DISPLAY UNIT (X54-3680-10)
LCD KEY
Q909,911
DIMMER SW
Q909
(LCD BACK LIGHT)
RT1N141U-T111
Q911
SSM3K15TE(F)
5.00V
IC904
5.02V 3.31V
XC6204B332M
L908
1 5
VIN VOUT
2
VSS
3 4
CE NC
5C
IC908
TC7SH08FU-F
4 oUTY 3
GND
2
5 INA 1
VCC
INB
5.02V
AND GATE
(TXD1/RXD0)
DM/KVL
PTT/TXD0 17
DUAL BUS
IC907
BUFFER
TC7WH126FU-F
(RXD0/RXD1)
5 A2 4
GND
6 Y1 3
7 G2 Y2 2
5C 8 A1 1
VCC
G1
5.02V
IC905
TC7SH126FU-F
BUS BUFFER
(TXD0)
4 oUTY 3
GND
2
5 INA 1
VCC
G
5.02V
IC906
LM2682MMX
4.86V
5
R933
GND
100
6
VIN
7
C1+
LINE
8
PROTECTION
NC
(PTT/TXDO)
C935
4.7u25
5C
CF
D927-936
KEY
BACK LIGHT
15
16
19
BUCNT2
TXD1
RXD1
RXD0
18
TXD0
BUCNT1
2.23V
R929
470k
DC/DC CONVERTER
(N100C)
IC909
LMC7101BIM5
4
VoUT
3 4 INPUT-
C2-
2
C2+
1
C1-
5
V-
OUTPUT
-9.69V
BUFFER AMP
(LCD CONTRAST ADJ)
+
CG
33C
5C
15
16
AFOSW
BLC2
19
LCDADJ
17
/PRST
18
TH901
100k
-t°
R941
120k
INPUT+ 3
2
V+
1