Appendix (Schematic Diagram Xc1-002) - Kenwood NX-300 Service Manual

A B
CONTROL UNIT (XC1-0020-XX)
R873
100k
R118
47k
R116
47k
L 7 1 1
33MDSP
L 7 1 2
G1 C5
J5
VSS_5 C2
J10 CVDD_7 VSS_4 B11
J11 CVDD_8 VSS_3 B9
0.1u C167 L1 CVDD_9 VSS_2
0.1u C166 CVDD_10 B1
L14 CVDD_11 VSS_1 A2
10u C822 M4 X2/CLKIN F2
100p C821 M11 CVDD_12 A'[0]
10u C102 CVDD_13 H11 A[0]
N7 CVDD_14 A[0] L7 A[1]
0.1u C104 N8 A[1] M7 A[2]
G11 CVDD_15 A[2]
USBPLLVDD K7 A[3]
D2 USBVDD A[3] K6 A[4]
L9 F10 A[4] P6 A[5]
C14 ADVDD A[5]
0.1u C113 AVDD M6 A[6]
A13 RDVDD_1 A[6] L6 A[7]
10u C112 B13 A[7] N5 A[8]
10u C111 A14 RDVDD_2 A[8]
0.1u C120 RDVDD_3 L5 A[9]
C12 RCVDD_4 IC719 A[9] P4 A[10]
0.1u C164 D14 A[10] N4
1u C163 D13 AIN[0] A[11] A[11]
AIN[1] L4 A[12]
D12 AIN[2] A[12] P3 A[13]
E11 A[13] N3
C1 AIN[3] A[14]
R867 100k PU DSP K9
D4 DP A[15] M8
R868 100k D3 A[16] P7
R869 100k H13 DN A[17]
R870 100k SDA P5
H14 SCL A[18] K1
A12 A[19] H3
B12 RTCINX1 A[20]
R135 10k RTCINX2 G3 D[0]
M2 GPIo13 D[0] L8 D[1]
R121 100k M1 D[1] K8 D[2]
R864 100k J3 GPIo12 D[2]
R872 100k GPIo11 P9 D[3]
H5 GPIo10 D[3] M9 D[4]
R107 100k H4 D[4] L9 D[5]
R101 470k G5 GPIo9 D[5]
D1 GPIo8 P10 D[6]
CN112 GPIo7 D[6] M10 D[7]
C4 D[7] P11 D[8]
R136 100k D5 GPIo6 D[8]
A3 GPIo5 N11 D[9]
CN26 GPIo4 D[9] L10 D[10]
B3 D[10] P12 D[11]
E2 GPIo3 D[11]
E1 GPIo2 N12 D[12]
GPIo1 D[12] M14 D[13]
F3 D[13] L11 D[14]
E14 GPIo0 D[14]
XF L12 D[15]
L13
A[20]
R131
R127 100k
C109 100k
1000p R123
R193 R143
R874 100k 100k 100
R863 100k R147 100k 100k
R141 100k R194 100k
R142 100k R137 100k
R145 100k
R164 100k
D
R124 100
IC110
L 7 1 0
L 7 2 0
1 I N B
VCC 5
2 I N A
3 G N D
o U T Y 4
A[16]
C 1 1 8
A[0]
TC7SH08FU-F
1 u
C 1 6 2 0 . 0 1 u
G 1 A[15] D
oE
D[9] G 2 A15 D6 A[11] A[16] G 4 A 1 6
D[11] DQ9 A11 D5 A[19] A[15] V C C 1 D 6 D
G 3 DQ11 A19 G 5 A 1 5 V S S 1 L 7 0 8
G 4 D4 A[20] D[3] D 1 D[1] IC106 31BUR
VCC A20 G 6 D Q 3 D Q 1 R2023T
D[13] G 5 D3 A[5] A[9] H 1 C 6 A[5]
D[15] DQ13 A5 D2 A[1] A[10] A 9 A 5 C 4
G 6 DQ15 IC101 A1 H 2 A 1 0 IC103 N C 1 1 32KoUT
H1 D1 A[14] A[11] C 3 D[5] VDD 1 0
VSS1 A14 H 3 A 1 1 D Q 5 2 SCL
D[1] H2 C6 A[10] A[12] H 4 A 1 2 C 1 D[0] o S C I N 9
D[3] DQ1 A10 C5 A[13] D Q 0 B 6 A[7] 3 SDA
H3 DQ3 FLASH MEMORY A21 H 5 A 1 3 SRAM A 7
D[4] H4 C4 A[18] A[14] B 5 A[4] o S C o U T 8
DQ4 A18 H 6 A 1 4 A 4 4 I N T R B
D[6] H5 C3 A[6] B 4 CLKC 7
DQ6 A6 C2 A[2] 5 VSS X101
C105 1u H6 VSS2 A2 INTRA 6
C1 D[4]
32.768kHz
C106 L77-1802-05
C 1 5 9 0 . 1 u
0.01u
D RTC
D
R 1 2 0
4 7 0 k
D D
L 7 1 7
33MF
C 1 2 2 0 . 0 1 u
BUS SWITCH
A[0] 3 CD D
R406
/LCDRST VSS 2
0 /CS4
IC402
TC7WZ245FK-F RESET
R 4 0 7 1 0 k R149
1 /CS 4 VoUT
5 B2
A VIN 1 0
2 /RES G N D 4
6 B1 /WR
A2 3 3.2V XC6109C29AN-G 3.282V
R 4 0 8 1 0 k 7 G
3 A0 A IC105
I C 4 0 1 A1 2
8 VCC
4 /WR T C 7 4 L C X 2 4 5 F K D I R 1
5 D0 11 B8
G N D 1 0 C 4 0 2 0 . 1 u
12 B7 D[0]
6 D1 A
A8 9
D[1]
7 D2 13 B6
A7 8
8 D3 14 B5 D[2]
A6 7
15 B4 D[3]
9 D4
A5 6
D[4]
10 D5 16 B3
A4 5
11 D6 17 B2 D[5]
A3 4
18 B1 D[6]
12 D7
A2 3
D[7]
13 VDD 19 oE
A1 2
14 VSS 20 VCC
D I R 1
15 C1 0.1u
VDD
C2 1u C401 0.1u
16 V1
A
17 V2 C3 1u
BUS SWITCH A
18 C4 1u
V3
C5 1u C405
19 V4
20 V5 C6 1u 2 . 2 u 1 6 VOLTAGE DOUBLING
IC403 INVERTER
-10V L M 2 6 8 2 M M X
LCD CONTRAST A
CN1 C41 -9.74V
1 C1-
100p NC 8
C403 4.92V
2 C2+
C1+ 7
2.2u 3 C2- R 4 0 9
A 5A
16 VIN 6
4 7 R 4 1 7 0
4 VoUT
G N D 5
D401,D402.D403,D404
12KEY CONTROL
33M R 4 1 0 4 7 0 KEYO0
-7.13V 3.28V R411 4 7 0 KEYO1
A A A A A
3.28V R 4 1 2 4 7 0 KEYO2
A
KEYO3
R413 4 7 0
D101
12KEY BACKLIGHT SWITCH
12KEY BACK LIGHT
Q 1 0 1 #
* R 1 1 2
SB2
S11 R414 /KEYI0
* Q 1 0 2
0 4 7 0
* R 1 1 4 * R 1 1 7
S12 R415
/KEYI1
1 2 3 4 7 0
* C115
S2 S5 S8 R 4 1 6 /KEYI2
4 5 6 4 7 0
* Q 1 0 3
S3 S6 S9 R 1 4 4 /KEYI3
7 8 9 * 4 7 0
A
Q101,Q102,Q103
S4 S7 S10 S13 R418
/KEYI4
12KEY BACKLIGHT
SWITCH 4 7 0
A A
Q1,Q2,Q3
Q 1
LCD BACK LIGHT LCD BACKLIGHT
2SA1362-F(GR)
R15 SWITCH
3 2
0
Q 2
1
KTC4075E(Y,GR)
R16 R17
3 3 0 0
C12
4 7 0 p
Q 3
D11 SSM3K15AMFV
LCD BACKLIGHT
SWITCH
A A
XC1-0020-XX
D1 D2 D5 D6 D9 D10 D101 C108
_ _ _ _ _ _ _ _
0-10 K,K2
0-11 K3,K4 0.1u
B30-2337-05 B30-2337-05 B30-2337-05 B30-2337-05 B30-2337-05 B30-2337-05 DA2S101
C D
BUFFER 33MC
I C 1 0 7
S M 5 0 2 3 C N D H - G
X 1 0 2
R 1 5 9 L77-3015-05
4 Q
V S S 3 C 1 3 0
22 5 V D D 3
D oUTPUT
X T 2 0.01u G N D 2
6 X T N
I N H N 1 D R 1 6 5 R 1 0 2
4
V C C
ASQDET V C 1
R 1 6 2 22k 0 C 1 3 6 0 . 0 1 u
C 1 3 7 1 u
470k 9.5mV
C 1 3 8 0.1u
C 1 3 9 0.1u
D
15MDSP
33M A
A4
B4 XTALI
XTALo
32K A10
32I
A12 DSPCK
/RINT C N 1 0 4 B11
CKo
A11 USRCKI
A[0]
H18 ADD0
A[1] J18
ADD1
A[2] K18 ADD2
A[3]
L18 ADD3
A[4] M18
ADD4
A[5] N18 ADD5
A[6]
J17 ADD6
A[7] K17
ADD7
A[8] M17 ADD8
A[9]
N17 ADD9
A[10] P17
ADD10
A[11] K16 ADD11
A[12]
L16 ADD12
A[13] M16
ADD13
A[14] P16 ADD14
A[15]
J15 ADD15
A[16] K15
ADD16
A[17] M15 ADD17
A[18]
N15 ADD18
A[19] P15
ADD19
A[20] J16 ADD20
CN106 H15 ADD21
D[0] G17
DT0
D[1] H16 DT1
D[2] G15
DT2
D[3] F18 IC108
DT3
D[4] F17 DT4
D[5] G16
DT5
D[6] E18 ASIC
DT6
D[7] E17 DT7
D[8] F16
DT8
D[9] D18
DT9
D[10] D17 DT10
D[11] B15
DT11
D[12] D16
DT12
D[13] C15 DT13
D[14] D15
DT14
D[15] E15
DT15
/WR A15 WRITE
/RD A16
READ
LED_R B14
LED_G BHE
C14 BLE
/CS4 A13
CS4
/CS3 D13
CS3
/CS2 C13 CS2
B13
C N 1 0 5 CS1
/CS0 A14
CS0
/HRDY B12 HRADY
/HDS2 D14
HDS2
TXD0 R18
RXD0 TXD0
T18 RXD0
RTS0 R16
RTS0
PLL_MOD CTS0 R15
CTS0
AMT U15 TXD1
/PTT T15
RXD1
26P_TD V15
RXD2 TXD2
V14 RXD2
/OINT T14 TXD3
R153 100k
SCK1
R154 100k
R155 47k
R156 4.7k
R157 4.7k
A
D
R 1 6 8
0
A A
For Boot
ASIC JTAG
D
LCDCNT
/SCRST
BLC
R 7 1 1 0 SCBSY
/MNDNU
R 7 1 3 0 GPIO8
C 8 1 2
1u
R 7 1 4 0
SCTXD
R 7 1 5 0
RXD0
(SCRXD) R 7 1 6
0
A
A
C N 7 0 1
20Pin OPTIONBOARD
C114 C115 Q101 Q102 Q103 R 1 0 6 R108 R112 R114 R117 R401 R 4 0 3 R405 R848 R849
_ _ _ _ _
_ _ _ _ _ _ _ _ _
0
_
470p 2SA1832(GR)F KTC4075E(Y,GR) SSM3K15AMFV 4.7k 470k 0 330 0 1.5k 1.5k 1.5k 0
1u
E F
3.824V
VOLTAGE REGULATOR(33M)
33M
I C 4 0 4 X C 6 2 0 4 B 3 3 2 D - G D416
D405,D406
4 N C 2 33M CONTROL
V o U T 3 DC/DC CONVERTER
5 V S S L401
N C 1 L702 L410 DC/DC CONVERTER
2
6 C E +B
V I N 1
22u
3.82V
D 4 1 6 1SS388F
R 5 4 8
47k
DC/DC A
3.82V
CONVERTER(15M) I C 7 1 7
L719
15MA L715 L718 5 V I N 1 R 7 2 5
4.7u LX
10
1.5V V S S 2
15M
C E / M o D E 3
4 V o U T
X C 9 2 3 5 A 1 5 C M - G
A
A 4.99V
3.31V
VOLTAGE REGULATOR(33A) A
D 4 1 7
I C 4 0 6
33AA 33A 1SS388F D416
X C 6 2 0 4 B 3 3 2 M - G
L716
C 1 4 3 0.01u L704 33A CONTROL
4 N C R 5 4 9
D C 1 4 4 1 u 1 u 1 u
C E 3
C 1 4 5 0.1u 47k 3.82V
DGND3
E12 C 1 4 6 0.1u V S S 2
DGND2 0 . 1 u
E11 C 1 4 7 5 V O U T
DGND1 E10 C 1 4 8 0 . 1 u V I N 1
DVDIo7
L5
DVDIo6 C 1 4 9 0.01u D
DVDIo5 P6 C 1 5 0 1 u
P11 C 4 1 1 1u
DVDIo4 C 1 5 1 0.1u
L14
DVDIo3 C 1 5 2 0.1u
DVDIo2 H14 A
E13 C 1 5 3 0 . 1 u
DVDIo1 C 1 5 4 0 . 1 u
E7
DVDD10 C 1 5 5 0 . 1 u
DVDD9 M5
N5
DVDD8 D
P9
DVDD7 P10
DVDD6
N14
DVDD5 SBC_ASIC
M14
DVDD4 G14
DVDD3
F14
DVDD2
E9
DVDD1 E8 DSR
GPIo11
B5
GPIo10
C6 5UC
GPIo9 B6 EXAMT
GPIo8
A6
GPIo7
U8
GPIo6 R8 INAMT
GPIo5
R7
GPIo4
T7 ENC4
GPIo3 V10 D ENC3
GPIo2
U9 ENC2
GPIo1
V9 ENC1
GPIo0 T9
SIMRST /MNDNU R 1 9 2 1k
C11
SIMCK
D12 R 1 9 0
SIMDT C12 R888 100
SYMTIM 1k
R5 FSDET
FSDET
R6 D /5TC D D D
TXRVE R2 /DSW
TRAMP
P3
TMoD
P2 /APCSW
PSTPA M4 R171
PSTIF /SYMTIM MM
R1 0 D
PSTPLL
N3 /SAVE
RXRVE N2 /T_R
RXSLT
P1 5RC
PSRRF
L4 IFC
PSRIF M2
PSRPLL PLD
M3
RSSIT
N1 /DWUP
VFRM D8 ASQDET
VoINT
D7 /UDET
MCo2 R187 1k
C7 D /EMG
MCCS2 D10 R172 0 PLD
MCCK2
C8 /MCCSRCN
MCCR1 PLD
D9 /MCCSXCN
MCCX1 B7 HOST_RDY
MCo1 OPT10
C9 MCDICN
MCI1
B8 MCSCKCN
MCCK1 A7
MCCS0 /MCCSAF
B10 MCDOAF D
MCo0
MCI0 B9 MCDIAF A
D11 MCSCKAF
MCCK0 R 1 7 3 /SCSW
AGCDAC A8 ASQAPC
APC LPF
R3 0
APC/ASQ SMF
R 4 7 0
D D R 7 3 9 C 7 1 6 C830
18k
82k
680p 1 0 0 0 p
C 7 2 3
0.1u
A
A A
A
SSM3K15AMFV
REVERSE
CURRENT
PREVENTION
R 7 3 6 C 7 1 3 R 8 5 0 W/N NOISE SWITCH
D 1 0 2
K D R 7 2 0 F - P 82k 3300p 0
R 7 4 8
D
or 1SS416
10k
/DINT
D
2 INPUT
AND GATE
A
5A
INAMT
EXAMT
IC703
D/A CONVERTER
/OINT
RXD2
26P_TD AMT
R 4 2 6
/SCSW
0
C 7 2 6 0 . 1 u
RX AF LPF
I C 7 0 4
A B U 7 4 6 5 H F V
RXAF SMF
1 I N +
V D D
5
2 V S S
C 7 0 1
RXAF C 7 0 9 R 7 3 8 R 7 4 6 3 I N - R766
0.1u
oUT 4
R 7 3 0 4 7 0 26P_RD 1u 56k 56k 0
26P_TD
C 7 2 5 1 8 0 p
19
SC L I o1. 2 12
20 OPT11 R 7 5 3 6 8 k
SD A I o1. 1
11 C 7 1 1 0 . 1 u
21 RXEO
VD D I C 7 01 I o1 . 0 10
22
IN T PC A9 5 35B S V SS RXEI C 7 1 5 0 . 1 u
9
23 OPT8
A1 I o0. 7 8
24
A2 I o0 . 6 OPT7 R 7 3 5 R 7 5 0 C 7 2 7 R765
7 BEEP
47k 10k 0.1u 3 3 0 k
A A OPT6
OPT5
I/O CONTROL OPT4
OPT3
OPT2 A A A
OPT1
C 7 2 0 R 7 5 4 R768
OPT9
560k 2 2 0 k
0.01u
A
C 7 0 4 C731 R769
AI
0.1u 0 . 0 1 u 3 3 0 k
26Pin OPTIONBOARD R 7 3 3 R 7 4 2 C 7 2 2 R 7 5 5 C732 R770
TONE
100k 0 . 0 1 u 3 3 0 k
47k 10k 0.01u
A A A
Q 7 0 2
L701 TONESW R 7 4 9
S S M 3 K 1 5 A M F V
4.7k
TONE SWITCH
A F701
R 8 9 0
POW A
C N 7 1 0 STSW
0 F53-0360-05
OPT6
C 7 0 5
AO
A
0.1u
C 7 0 3
4.7u
SUB (GPS) UNIT (X58-5240-10)-CN10
C 7 0 8
TXO
0.1u
VOX
R 7 6 4 2 2 k
R 7 6 3 2 2 k
R 7 6 2 C730
MODULATION LPF 22k 3 3 0 p
A
MOD SMF
R 7 5 7 C728
22k 3 3 0 p
R 7 4 4 R 7 6 1
MOD
22k
22k C 7 2 1
MIC R767 10k
0.1u C735 1 2 0 0 p
I C 7 0 6
MIC AA B U 7 4 6 5 H F V
MIC AMP 4 o U T
IN-
VSS
5 V D D
IN+
C 7 9 9
0 . 1 u
TXI
DTI
G
D412
CN402
DC SWITCH
Q401,Q402 7.49V
CONTROL
L 4 0 2 LEVEL CONVERTER
R438 Q402
D408 Q408
1 0 0 k 4 3
BATT INT
R456 DC/DC CONVERTER DC SWITCH
A 5 2
4 7 0 k 7.49V
R439 6 1 D408
Q408
6.05V 1 0 0 k 1 S S 3 0 1 F RESET
EMD12
SSM6N16FE-F R466
A 1 6
1 0 0 k A
R435 7.46V
2 5 7.49V
1 0 0 k Q401
3 4
1 6 A
A R454 A
7.5V 2 5 4 7 0 k D412
R436 R469 3.32V
1 S S 3 0 1 F Q413
3 4 2 S A 1 9 5 5 A - F VOLTAGE REGULATOR
1 0 0 k R465 4 7 0 k DC SWITCH
VOLTAGE REGULATOR(5A) SSM6N16FE-F
A 1 0 k
7.55V 3.32V
SB2 Q403 SB2 A
2 S J 6 4 8 - A SW
DC SWITCH
CONTROL
Q412
SSM3K15AMFV
A
OVER VOLTAGE A
31BU
PREVENTION C454
5A Q404
C742 Q409
SSM3K15AMFV 1 u
R437 A
2 S A 1 9 5 5 A - F
1 u D411
4 7 0 3.24V
A
KDR720F-P R501
5A SWITCH or 1SS416
2 . 2 k
Q410
A A A SB2 SW SSM3K15AMFV L 4 0 3
A SB2 CONTROL
A
A
D411,D413
Q409.Q410 VOL
R432 0
SBC RTC BATT
/BINT DC SWITCH ENC3
CONTROL
/PSW ENC4
ENC1
ENC2
DC SWITCH
Q414
EMD12
1 6
A
2 5
3 4
TV2
PLD CONTROL
C480 0.01u
TV1
D702 R819
R790 DA2S101 1 0 k
PGND
R785 1 k R798 1 0 0 k
6 . 8 k C755 47p
R803
ASQ DET
1 0 k
A KDR731
A R824
SQL BPF/SQL DC AMP R809 C771
3 9 k
3 3 0 k 0 . 2 2 u
C804 C764
D705
4 7 p 1 0 0 0 p
NOISE
Q704 DETECTOT Side_G
KTC4075E(Y,GR) Side_1
C752 1 0 0 p R799
Side_2
A A C753 100p 3 3 0 k
A A
A
VCO_MOD
Q704
Q703 R:5.14V
SQL NOISE AMP
Q406,Q407
Q406
2 S B 1 1 3 2 ( Q , R ) VOLTAGE REGULATOR(AF AMP)
3 2 R471
0
A 1
6 4
AUDIO AMP
R496 1 0 0 k
(D)
IC413
R441 AF AMP SWITCH
1 2 3 1 SHUTDoWN
1 5 k R459 Vo- 8
0 . 1 u 2 BYPASS
C440
Q405 1 k GND 7
SSM6N16FE-F D409,D410 C437 R489
3 IN+ 6_/KEYI0
A 1 6 SP CONTROL 2 2 k (D) VDD 6
0 . 0 5 6 u 4 IN-
D409 BL_SB
A Vo+ 5
2 5
6_KEYO1
DA2S101
3 4 C438 R490 T P A 6 2 0 1 A 1 D R B R
R495 6_KEYO0
0 . 0 5 6 u 2 2 k (D) 1 0 0 k (D)
A D410
DA2S101 R484
6_KEYO2
2 2 k 6_/KEYI1
AF AMP
AUDIO AMP
IC408
R497 1 0 0 k
BU7465HFV (D)
IC412
R433 1 IN+
VDD 5 1 S H U T D o W N
0 2 VSS
Vo- 8
C439 0 . 1 u 2 B Y P A S S
C424
A 3 IN- GND 7
C435 R487 3 IN+
o U T 4 0 . 1 u
VDD 6
0 . 0 5 6 u 2 2 k (D)
4 IN-
R446 2 7 0 k
R434 Vo+ 5
A
3 9 k C422 10p AF SWITCH
T P A 6 2 0 1 A 1 D R B R
R458 C436 R488
R453 A R494
SP DRIVE
1 0 0 k 1 0 0 k 0 . 0 5 6 u 2 2 k 1 0 0 k
(D) (D)
IC713
BU7242NUX
RX AF SWITCH
5 IN2+
V S S 4 C778
SCSW(RXAF) 6 IN2-
A
IC707 IN1+ 3
7 oUT2 1 u
T C 7 W 5 3 F K ( F )
IN1- 2 R818
8 VDD
5 A 1 0 0 k
o U T 1 1
GND 4
6 CH1 D12,D13,D14,D15,D16
VEE 3
1:VREF REVERSE CURRENT
7 CH0 /2:RX SUM
C779 PREVENTION
INH 2 C756 R800
8 VCC R29
CoMMoN 1 0 . 0 1 u
0 . 1 u 4 7 0 k 1.65V REF 1 k
/RX SUMMING AMP
C745 0.01u
R777
A R28
4 7 k
1 k
OPT SWITCH
VGS REC SEL
R779
D414,D415
4 7 k A
VOLTAGE REGULATOR(50U) REVERSE CURRENT PREVENTION
SIDE TONE MUTE
5V
R502
IC709
T C 7 W 5 3 F K ( F )
1 0 k D414
1 CoMMoN R503 KDR720F-P
VCC 8
2 INH R805 R814 1 0 k or 1SS416
CH0 7
3 VEE 4 7 k 5 6 0 k
R806
CH1 6
R797
4 GND 4 7 k
A 2 INPUT
A 5 1 k AND GATE
A
C746 0 . 0 1 u
A C453
0 . 0 1 u
A
A
R500
A
4 7 k
R477 5AD
0
Q411
LEVEL CONVERTER
D707
C757
DAC_23 VOX VOX
4 . 7 u DETECTOT
R784 R796 C758
D706
C775
1 0 0 k 3 3 k 4 . 7 u KDR731 DA221
DI R828
4 7 p C787
R860 C789 R835 C791
R816 0
A
1 u 0 6 8 p 1 5 k 0 . 0 3 9 u
6 8 k
R833
IC715 1:MIC SUM1/
6 8 0 k 2:VOX
BU7465HFV
1:MOD SUM/ A
4 oUT
2:MIC SUM2 R840
IN- 3
1 2 k
VSS 2
MOD/MIC SUMMING
5 VDD
AMP
IN+ 1
VOX AMP
C772 0.01u
C750 R846
A
ME
4 7 p SCSW(MIC) VOX AMP A 4 7 0
R839
R783 R787 R801 C762 A
R830 3 3 k
0 . 1 u 1 M A Q707
1 8 k 1 2 0 k 4 7 k MIC AGC Q705 2 S J 6 4 8 - A
2 S C 4 7 3 8 ( G R ) F C788 R832 C790 C792 C797
R836 3 1 A
KDR731 3
A R822 4 7 k 0 . 1 u 1 u
1 1 5 p 4 7 k 1 u 3.32V
R775 1 0 k
1 8 k 2 R837 C793 MIC MUTE 2
3 6 8 k 0 . 1 u
D704 R834
R843
2 D703
0
KDR731 1 k
1
R838 C794
2
A
R823 1 MIC AGC 5 6 0 k 0 . 1 u
MIC SWITCH 3 A
1 0 k
A Q706
D703,D704
C748 R788 2 S A 1 8 3 2 ( G R ) F
DETECTOR
4 7 k
0 . 1 u
C737 C747
R780 R789
0 . 1 u 1 0 0 k 0 . 1 u 1 5 0 k
A
H I
NX-300(G)
APPENDIX
(SCHEMATIC DIAGRAM XC1-002)
1
L 1 0 1
L 1 0 2
D A
C459
4 7 0 p
C460
6 8 0 0 p
C461
4 7 0 p
Vol_SW/ENC
A 1
R506
2
2 . 2 k
3
R510 4
1k R509
5
R508 1 k
A 6
1 k
R507 7
1 k R504
8
1 k
9
2
1 0
CN403
DC SWITCH A A A A A
Q415
LED_G R511 1k
EMD12
/EMG R512 100 2 1
1 6 LED_R R513 1k
4 3
A IFC R514 1k
2 5 /SAVE R515 1k
6 5
I2CCK R516 100
3 4
/5TC R517 1k
I2CSDA R518 100 8 7
SBC R519 1k
10 9
/T_R R520 1k
R521 1k
1 2 1 1
ASSIST R522 1k
R523 1k
VAGC R524 1 4 1 3
1k
5RC R525 1k
R526 1k 1 6 1 5
1 8 1 7
RSSI R527 1k
CV R528 1k 2 0 1 9
2 2 2 1
R551 PLL_MOD
2 4 2 3
0 A
2 6 2 5
2 8 2 7
A 3 0 2 9
/PTT
R529 100
R530 100 3 2 3 1
R531 100
W_/N 3 4 3 3
R532 1k
SDO1 R533 100
3 6 3 5
R534 100
/PCS_RF
R535 100
/DSW R536 1k 3 8 3 7
R537 1k
/APCSW R538 4 0 3 9
1k
R539 1k
4 2 4 1
THP R540 1k
PLD
R541 100
R550 0 38M 4 4 4 3
SCK1 R543 100
4 6 4 5
S_DET R544 1k
4 8 4 7
R545 100 5 0 4 9
3
CN404
A
SWITCH UNIT (X41-3840-10)
6KEY/SP/MIC
1 4
R20
1 k A
1 3
R21 1 . 2 k
1 2
R22 1 k 6KEY
1 1
R23 1 k
1 0
R25 1 . 2 k
9
R24
1 k
8
R26 1 k
L 1 7
6
D18,D19
5
SURGE SP
ABSORPTION
A L 2 A 4
3
R40
2
0 MIC
1
CN23
A
CN22 CN24
A
D20,D21
SURGE
ABSORPTION
4
A
1 SSW
L 4 2
SP+
L 5
3 SP-
4 MSW
R30
L 6 5
EMC
1 0 0 L 7
6 ME
R31
7
PTT
1 k
8
PF
R32
9 OPT
1 0 0 L 8
1 0 E
L 3
A 1 1
5V
R35
1 2 TXD
1 0 0
R33
1 3
RXD
1 0 0
R34 1 4
NC
1 0 0
CN405
IC417 D17,D22,D23
SURGE
DUAL BUS BUFFER
ABSORPTION A
IC418
T C 7 W T 1 2 5 F U F
1 G1
VCC
2 A1 8
3 Y2 G2 7
Y1
4 GND 6
A2 5
C464 0 . 0 1 u
A
5
DUAL BUS BUFFER
MIC MUTE
SWITCH
Q5
2 S J 3 4 7 F
2 3
1
*
R848
SSM3K15AMFV
3
Q4
A A
1
2
* R849
A A
A A
MIC MUTE CONTROL
6