Icom IC-7300 Schematic Diagrams page 5

BLOCK DIAGRAM (BLOCK DIAGRAM-3)
DS1(LCD)
LCD VLED-/VLED+
LIGHT
LCD
XR/YD/XL/YU
LCD-TW
SDWP/SDCD/SDDAT1/SDDAT0
SDCLK/SDCMD/SDDAT3/SDDAT2 SD UNIT
VDD
RDS
TDS
IC101
TPS61161ADRV
LCD
BKLV
LIGHT
CTRL
R3-R7/G2-G7/B3-B7
DE/VSYNC/HSYNC/CLK/DISP
FROM MAIN
IC152
UC6528
TWDCLC/TWCS/TWDTX
TWBUSY/TWDRX/TWPIRQ
TW-CTRL
3R3V
S22 PUSH-SWs FRONT
CPU
[TRANSMIT] [MENU] [RIT]
IC501
[TUNER] [SCOPE] [SPLIT] R5F104LCAFB
[P.AMP/ATT] [MP] [M-CH DN]
[CLEAR] [QUICK] [dTX]
[NR] [SET] [A/B]
[NOTCH] [XFC] [M-CH UP]
[NB] [AUTO_TUNE] [CLEAR]
[SPEECH/LOCK] [V/M]
[TS]
3R3V
FRES
FLRXD
LTXD
FLTXD
LRXD
PWRK
PWRK
MICE
MICE
MICI
MICI
AFO
AFE
DISPLAY UNIT
Q2
LDTC143ZE DS1107
G
CTRL
R
SEC2462C
Q3
LDTC143ZE
CTRL
PBT UNIT
PBAAK/PBABK/PBBAK/PBBBK/PCLEK
RFL/AFL
3R3V
RIT UNIT
MFDAK/MFDBK/MFK
MAIN DIAL
MAINDAK/MAINDBK
5V EX-2500
Q462 2SB1132L
Q461 L2SA1576AR
8V
LIMITER MIC UNIT
FUDL
MICE
MIC
GND
Q492 DSC7004S AF OUT
Q493 LDTA114
+8V
Q491 L2SC4081
PTT
SQL
FTRAS SEND MIC U/D
FSENI SW
Q481
LDTC143ZE
FSQS
SQL
[POWER KEY]
HT-191UYG
PWRK
Q1
LDTC143ZE
DS1
PWRDS
CTRL
PHONE UNIT
PHK
t
SCHEMATIC DIAGRAMS
VR UNIT
[AF GAIN]
[RF/SQL]
J1
1 7
2 8 6
3 5
4
J1
FRONT UNIT
A-7290-3EX-w
To upgrade quality, some components may be
Printed in Japan
subject to change without notice.
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