![background image](http://html.mh-extra.com/html/icom/ic-7800/ic-7800_service-manual_612345182.webp)
LINE
DATA BUS LINE
VOLTAGE LINE
Explanatory notes
MAIN DIAL
SUB DIAL
LCD
EP1
EDTCB23QAF
DIM
CTRL
IC202/Q209/Q210
TC7SET08/2SB1201/2SC4081
CF_BOARD
CF_CARD
VR-A_BOARD
PBT1_BOARD
PBT2_BOARD
VR-B_BOARD
MIC_BOARD
MIC
JACK
JACK_BOARD
PHONE
JACK
VR-C_BOARD
VR-D_BOARD
SW-A_BOARD
SW-B_BOARD
SW-C_BOARD
TENKEY_BOARD
LED_BOARD
Q201/202
2SC3647
DC/AC
INVERT
IC201/Q203/204
TC7SSET08/2SC4081/2SB1201
BRIGHT
CTRL
EXPAND
IC1-IC5
BU4051
IC7
BU2099
SERI
PARA
RTC
IC601
RX-4581
RESET
R3112N281A
IC651
R8
REG
Q804/805
2SD1619/2SC4081
T8
REG
Q803/Q802
2SD1619/2SC4081
R8
REG
Q806/807
2SD1619/2SC4081
EEPROM
IC610
HN58X2464
CPLD
IC605
XC9572XL
CI-V
I/F
IC601/IC602/Q601/Q602
TC7SH04/TC7SET04/2SC4081/2SA1576
BUFF
IC851
NJM2058
IC51
IDT70V24L25PF
DualPort
SRAM
Flash
IC1/IC2
E28F128J3A
CPLD
IC52
XC9572
SDRAM
IC1/IC2
MT48LC16M16A2
SDRAM
IC201/202
MT48LC16M16A2
A/D
IC209
AK5355VT
D/A
IC211
AK4384VT
IC852_1/4
NJM2058
BUFF
IC853_1/4
NJM2058M
IC207/IC208
USB
Drive
Video
IC204/IC206
ADV7123/SN74ACT04
EtherC
IC404
RTL8139C
EEPROM
IC403
BR93LC46
IC401
PCI1410APGE
Card
BusC
D/A
IC603
BU9480
Clock
IC104
TC7SHU04
RESET
IC53
R3112N281A
IC801
BA033
3.3V
REG
IC105
CY2292F
Clock
GEN
BUFF
IC106
TC74VCX04
CF_REG
IC402
TPS2211
CR2032
BT601
A/D
IC210
AK5355VT
D/A
IC212
AK4384VT
BUFF
IC853_1/4
NJM2058M
BUFF
IC853_1/4
NJM2058M
BUFF
IC853_1/4
NJM2058M
IC852_1/4
NJM2058
IC852_1/4
NJM2058
LOGIC UNIT
FRONT CPU
DISPLAY UNIT
FRONT UNIT
MAIN
SUB
MAIN CPU2
MAIN CPU1
GDC
MEMORY BOARD
S-METER OUT
25M
IC6
M30620FCMGP
IC604
HD64F2377VFQ33V
IC103
HD6417751RBP200
9.8304MHz
C15V
+15V
25.000MHz(EtherC)
33.333MHz(PCI)
32.768MHz(MAIN CPU1)
IC203
HD64404BT
EXT
MONITOR
CI-V
CFVCC
VDD3R3
VDD5
VDD3R3
MAIN_UNIT
EXT USB
MAIN NB/NR
SUB NB/NR
MAIN RF/AF
SUB RF/AF
MIC/PWR
MAIN AGC/SQL
KEY DELAY
SUB AGC/SQL
BRIGHT
CONTRAST
ANTI VOX
VOX GAIN
DRIVE
COMP
MONI GAIN
MAIN TWIN PBT
MAIN APF/NOTCH
SUB TWIN PBT
SUB APF/NOTCH
CW PITCH
RX MAIN REC
RX SUB REC
MIC REC
VOX AF
MAIN PLAY
SUB PLAY
MIC PLAY
SYSTEM RESET
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