Kenwood NX-411 Service Manual page 82

AO
NX-411
SCHEMATIC DIAGRAM
VCO_MOD
+B
33C
D209
SPEED UP
OP AMP (50T)
DIODE
50C
IC208
R : 3.20V
TC75S51FE(F)
T : 0V
D209
HSC119
1
IN+
VDD
R239
2
VSS
47k
3 IN-
oUT
R : 3.3V
T : 0V
5.02V
DC SWITCH R : 4.97V
T : 0V
Q205
SSM6L05FU-F
50R
R : 0V
T : 4.77V
7
5
SB1
BATT
SB2
33M
+B
R236
100k Q203
SSM6N16FE-F
R234
470k
R229
100k
DC SWITCH
R230
100k Q204
SSM6N16FE-F
R235
R231
470k
100k
DC SWITCH
+B
Q201
SB2
2SJ648-A
SB2
6
Q201,202
R223
DC SWITCH
470
Q202
SSM3K15TE(F)
D208
REVERSE
CURRENT
PREVENTION
6 6
SBC
82
X57-812 (A/2) 8/11
AP
+B
33C
Q207
DC SWITCH 50C
R : 0V
5.02V
Q207
50T T : 4.94V
2SA1955A-F
50T
5
R : 5.02V
REVERSE
T : 4.23V
R250
CURRENT
1k
4
PREVENTION
50R
50R
R : 3.29V
T : 0V
7
5
DC SWITCH
Q206
EMD12
LOGIC OR
D212
R243
1SS301F
100k
D213
LOGIC
R244
1SS301F
OR
470k
R245
10k
3.10V
SCTAMI
Q209
SSM3K15TE(F)
3.11V
31BU
D210
1SS416
2.91V
D210,211
REVERSE CURRENT
PREVENTION
AQ
C539 R533
1u 10k
OP AMP
(RF CONTROL)
R : 4.28V
T : 4.28V
IC505
VCO MOD TC75W51FK(F)
1
VDD
C533 R530 R529 2
3
1u 100k 0
4
VSS
C534
0.1u
C536
100p
5
7
SB2
7.50V
+B
7.50V
BATT INT
VOLTAGE
DETECTOR
Q209,211
DC SWITCH
3.12V
AVR
Q211
(BACKUP)
2SA1955A-F
Q208
2SA1955A-F
C258
1u
Q210
SSM3K15TE(F)
Q208,210
DC SWITCH
AR
TX-RX UNIT (X57-8120-10) (A/2)
50C
R : 4.26V
T : 4.31V
DC SWITCH
R : 5.03V
T : 5.04V
APC Q503
2SC5383-T111
8
7
R : 4.98V
T : 5.04V
6
5
R550
220k
D504
SPEED UP
DIODE
7
SB2 R271
0
LG LR
TX/RX LED
R : 0.16V R : 6.07V
T : 6.57V T : 83.5mV
DC SWITCH
R269
0
Q212 Q213
EMD12 EMD12
LED_R
LED_G
Q212,213
DC SWITCH
SBC
AS
7
7
/EMG
7