Block Diagram - Kenwood NX-300 Service Manual

NX-300(G)
Control unit (XC1-0020-XX)
IC101
Flash
Memory
BUS SW
/LCDRST
33M
M62364FP-F(7/8)
LCDCNT
DAC
IC1
NJM2130F3-ZB
–10V
12key Back Light
D1,2,5,6,9,10
LCD Back Light
D3,4,7,8
BL_SB
Q415
EMD12
Q414
EMD12
+B
TV1
TV2
/EMG , /PTT , Side_1 , Side_2,Side_G , IFC ,
5RC , 5TC , /DSW , /APCSW,SBC , /T_R ,
ASSIST , SDO1 , SCK1 , PLD
92

BLOCK DIAGRAM

PCK DSP/PCS DSP
PLL MOD
IC103
DSP
SRAM
IC719
/DRST,DCLK,/SYMTIM,/RSSITIM,
/DINT,/SWUP,FSDET,/HINT
IC401 TC74LCX245FK
MCD1AF,/MCSCKAF,/MCCSAF,MCD0AF,MCD1CN,
IC402 TC7WZ245FK-F
/MCCXCN,/MCD0CN,/MCCSRCN,MCSCKCN
D0~15,A0~20,/RD,/WR,/CS0,/CS2,/CS3,/CS4/HDS2,/HRDY
RXD0
IC703
/UDET
RXD3
ENC1
ENC2
ENC3
ENC4
SB2 5A
ASQDET
AVR
BLC
BATT
Q101 2SA1832(GR)F
PFKEY
Q102 KTC4075E(Y,GR)
Q103 SSM3K15AMFVF
SB2 5A
SCSW
AVR
BLC
STSW
Q1 2SA1362-F(GR)
EXAMT
Q2 KTC4075E(Y,GR)
INAMT
Q3 SSM3K15AMFVF
BEEP
TONESW
/MNDNU
DC SW
SBC
DC SW
SBC
IC703
(3/8,4/8)
M62364FP-F
RSSI , THP , VAGC , CV , S-DET
TO DSP
IC106
RTC
R2023T
I/O Expander
IC701
PCA9535BS
X101 32.768kHz
CN710 26pin Option Board
SM5023CNDH-G
IC107
33A 15M 33M
TXD0
RTS0
CTS0
DSR
/PTT
/BINT
/PSW
VOX
VOL
BLC
ASIC
MM
IC108
/AMT
5UC
LED-G
LED-R
33A
DAC
SDO0,SCK0
/EVCS
/RINT
32K
I2CCK,I2CSDA
/OINT
KEY Matrix (12key)
X102
18.432MHz
VC
33M
TCXO
IC105
XC6109C29AN-G
RESET 33M
IF_DET
IC711 Q704
BU7242NUX(2/2) KTC4075E(Y,GR)
BPF AMP
ASQAPC
LPF LPF
IC702 IC702
BU7242NUX(1/2) BU7242NUX(2/2)
/SCSW
AMT
IC704
BU7465HFV
RXAF
LPF
IC707
TC7W53FK(F)
Q702
SSM3K15AMFVF
TONE
SW
TONESW
IC706 IC710
BU7465HFV BU7242NUX(1/2)
MIC
LPF SUM
IC705 IC705
BU7242NUX(2/2) BU7242NUX(1/2)
MOD
LPF LPF
33M
X
15M
33A
D705
KDR731
Rect
IC
M6236
D
Q701 2S
M
IC
BU724
S
STSW
OPT9
MUTE
AI from VGS
IC709
TC7W53FK
IC712
TC7S66FU
MUTE
/SCSW
IC71
BU7242N
SUM
DI