Kenwood NX-220 Service Manual page 97

F
DISPLAY UNIT (X54-3760-XX) (A/3)
D
SB2
50C
33A
DISP_VER
/EVCS
SCK0
SDO0
33A
LEDR
LEDG
10
11
SPAF
12
TV1
(0V-1.65V)
TV2
(0V-3.3V)
R26
68k
C30 R22
R21
56k
56k
1 u
50C
1
ASQAPC
33A
IC 1
T C 7 5 W5 1 F K (F)
1 oUTA
VDD
2 I N- A
oUTB
3 I N+A
R2
IN -B
10k 4 V SS
IN + B
ASQ BPF
C6 C8 47p
1000p
33M
PTT SECTION
(X54-3760-XX)
(B/3)
G
SCHEMATIC DIAGRAM /
L1
L2
CP1
100x4
R81
0
C48 1u
C49 1000p
7 24
VoUT3 VoUT2
8 23
D/A CONV
VoUT4 V o UT1
9 22
IC4
VI N4 VI N 1
R2A20178NP
21
VI N5 VI N 8
20
VoUT5 Vo U T8
19
VoUT6 Vo U T7
C45
1000p
C39 0 . 1u
IC 2
33A
T C7 5W 51 F K(F )
1 oUTA 8
VDD
2 I N- A 7
oUTB
R79
6
3 I N+A
I N-B
5
4 VS S
VREF
IN+ B
AF LPF/MIC AMP
NOISE DET
SQL NOISE AMP
R14
8
330k
C22
C16
7
0.22u
1000p
6
Q 3
KTC4075E(Y,GR)
5
Q 2
SSM3K15T E( F)
C11
680p
AUX
PTT
S 1 S 2
S70-0516-05 S70-0516-05
H
X54-3760-XX
R84
*
-10
* R86
-12
VCO MOD/VREF
SQ_SW
IC 6
T C7 5W5 1FK ( F)
8
1 oUTA
VDD
2 oUTB 7
- +
3 6
+ -
4 V SS
5
D3,4 Q 4 , 5
AGC DET MIC AGC
2SC4738(GR)F
D3
Q 4
DA221
R39
10k
D4
DA221
VREF
R40
10k
Q 5
2SA1832(GR)F
C71
R47
56k 22k
0.1 u
R50
22k
D2
KDR731
R18
ASQ
39k
MIC
C35
0.1u
MOD
R23
0
BW SW
S 4
S3 Side 1 Side 2
S70-0516-05
S70-0516-05
I
NX-220
原理图
R82 R84 R86
C NO 0 NO
C2 3.3k 0
NO
50C
33A
3.30V
33M
SCK0
C68
SDI0
0.01u
SDO0
DISP_VER
/EVCS
/LCDCS
RXAF_2
ASQ
ASQAPC
MIC
5.00V
50C
MOD
VCO_MOD
3.30V
33A
TV2
C74
1u
TV1
SPAF
MICI
R77
10k
SB2
R78
6.8k R:7.47V
T:7.25V
R24
0
33M
CN6
GND
6
/EMG
5
/S2
4
/S1
3
PTT
2
GND
1
C
X54-376 (A/3) 2/2, X54-376 (B/3) 1/1
J
CN5
1
C7
47p
2
3
4
R82
*
5
C15
6
0.01u
7
8
9
C23
47p 10
11
C26
47p
12
R88
13
0
14
C28
47p
15
C29
47p
16
C31
47p
17
C33
47p
18
C34
47p
19
C36
47p
20
47p
C40
R10
21
C42
0
22
47p
23
C43
47p
24
C44
47p
97