NX-800
SCHEMATIC DIAGRAM
-9.69V
2.23V
4.86V
5.02V
ON HOOK
: 0V
5.02V
5.02V
5.02V
5.02V
8.00V
5.02V
7.87V
5.02V
3.31V
0V
5.00V
R :0V
T : 5.00V
0.76V
4.99V
R :1.98V
T : 0V
T : 1.86V
R :0V
T : 0V
R : 5.00V
7.27V
8.00V
7.97V
PREVENTION(HK/RXD)
GND
100
VoUT
GND
BUFFER AMP
(LCD CONTRAST ADJ)
C945
0.01u
5C
C933
PROTECTION
5
C943
C1-
NC
1000p
C934
4.7u25
(PTT/TXDO)
C935
4.7u25
7
1u
LINE
4
3
C2-
VIN
6
C944
1
C2+
C1+
8
2
4.7u25
1
OUTPUT
V-
INPUT+
INPUT-
V+
2
3
PTT/TXDO
HK/RXD
C913
DM/KVL
0.1u
RXD1
100
R999
Q901
(TXD0)
270k
R940
R906
330
IC906
DC/DC CONVERTER
R933
10k
R926
D
A204U
D913
4
5
LM2682MMX
(N100C)
47k
R908
100k
R907
HK/RXD0 SW
1k
R905
AFO SW
SSM3K15TE(F)
AFO/BLC SW
BUCNT1
VCC
G
0.1u
C926
47k
R934
1
2
GND
INA
4
5
oUTY
TXD0
RXD0
3
470k
120k
LMC7101BIM5
IC909
-t
R929
R941
100k
TH901
100k
R909
1SS416
D910
oUT IN1
CoNT1
6
5
4
3
GND
CoNT2
oUT_IN2
IN_oUT2
DTC144EE
Q904
DTC144EE
Q902
8
7
VCC
1
2
IN oUT1
IC905
TC7SH126FU-F
BUS BUFFER
TXD1
5C
0.1u
IC901
TC7W66FK-F
R927
47k
33k
R912
4.7k
R911
C917
5C
A1 1
8
G1
VCC
0.1u
C927
BUCNT2
47k
R935
Y2
G2
Y1
6
7
3
2
/PRST
R956
R954
R937
DIMMER SW
B30-2304-05
D914
47k
R936
(AFO)
10k
R916
TC7SH08FU-F
/PRST
5C
TXD
RXD
D910
REVERSE CURRENT
BUFFER
IC907
A2
5
TC7WH126FU-F
DUAL BUS
(RXD0/RXD1)
4
PTT/TXD0
DM/KVL
LCDADJ
0.1u
C929
0.1u
C928
120p
C920
100k
R914
3
R915
47k
0.1u
82k
4
oUT
IN-
(TXD1/RXD0)
AND GATE
R917 10k
0.1u
C921
2
1
C919
1000p
C918
R913
5
VSS
IN+
VDD
IC902
TC75S51FE(F)
INA
1
INB
5
VCC
2
3
GND
4
oUTY
BLC2
AFOSW
8C
C939
1u
10u
C964
0.1u
C940
1
5
5C
AF BUFFER AMP
5C
IC908
VOLTAGE
REGULATOR (33C)
NC
VoUT
1u
C916
4
NC
3
CE
5C
33C
L903
VIN
REGULATOR
VOLTAGE
(5C)
2
CE
VSS
10
4.7u
C915
IC903
3
4
R918
XC6204B502PR
L908
5
1
VOUT
2
1u
VSS
VIN
10k
R930
C930
IC904
XC6204B332M
10k
R919
RED
GREEN
DIMM
BLC1
SSM3K15TE(F)
1000p
C942
(LCD BACK LIGHT)
Q911
DTC114EE
Q909
8C
SW
B30-2282-05
B30-2282-05
B30-2281-05
B30-2281-05
B30-2281-05
B30-2281-05
(TX)
820
R966
820
R965
R964
390
390
R963
270
R958
270
R957
270
R955
270
R953
LED
TX/RX
5C
Q909,911
100
47
47k
BACK LIGHT
C941
1000p
1000p
C932
1000p
C931
Q908
DTC114EE
DTC114EE
Q906
DTC114EE
Q905
D915-926
LCD
R939
10k
BACK LIGHT
B30-2282-05
B30-2282-05
D928
D927
D918
D917
D916
D915
D930
D929
D934
D932
D926
D924
D922
D920
D927-936
KEY
D936
D935
R938
470
R932
560
R931
(BUSY)
TX/RX LED
TX/RX LED
LIGHT
LCD
BACK
10k
12A02CH
Q910
D931
D933
D923
D925
D919
D921
LCD
KEY
+
+
+
19
18
18
17
17
19
16
15
15
15
16
15
16
X54-364 2/3
CC
CD
CE
CF
CG
DISPLAY UNIT (X54-3640-10)