![background image](http://html.mh-extra.com/html/icom/ic-2800/ic-2800_service-manual_612060037.webp)
2SC4081
MA8075
X4
SMD-49
V BIAS SEL
Q34 UMG9N 1/2
Q35 DTB123EK
INITIAL MATRIX
OSC1
OSC2
EEPROM
IC17 X25320SI
ESO
POWER SW CTRL
Q74 DTC143XU
Q75 2SB1201
MICIN
CP
IC1
HD
HD
MU/D
PROTECTER
D61 MA8062
MIC
MDATA
MICE
EXTMIC
MIC SENS. CTRL
IC25 TC7S66FU
D66 1SS355
D44
Q76
Q77
8V REG
IC14 TA7808F
2SB1132
U BIAS SEL
Q34 UMG9N 1/2
Q36 DTB123EK
RES
ESI,ECS,
ESCK
1RX
4RX
PCTRL
F
ANC
IS0, IS1, IS2
II0, II1, II2, II3
MIC MUTE
9600 bps SW
IC26 BU4066BCFV
Q93 DTC144EU
PTTM
RDATA
GND
SP
SPE
MU/D
EXTMIC
VT8V REG
Q9 2SC4081
Q10 2SA1362
U8V SW
D28 1SS355
D29 DAN202U
E
MU/D
M8V
PTT
+
—
10.000 MHz
C5V
4R8V
VR8V
VT8V
MF1 (CHASSIS)
13.8V
8V
J3
J5
1
2
3
4
5
6
7
8
W4
FAN CONTROL
MIC
INPUT
MIC8V SW
Q90 2SD999
Q91 DTA144EU
Q92 DTC114EU
D64 MA8091
D65 1SS355
MIC SEL
D62 1SS355
MDATA CONT
IC24 TA75S01F
D63 MA8091
PTTM CTRL
Q78 2SC4081
D47 1SS355
HV
TDATA
UT8V REG
Q25 2SC4081
Q26 2SA1362
C5V REG
IC15 TA7805F
RESET
IC16
S-80945ALMP-DA9
R DATA
BUFFER AMP
Q80 2SC4081
T DATA
BUFFER AMP
Q79 2SA1576
INPUT POWER
DC 13.8 V
1
2
3
4
5
6
CPU
IC10
HD6433032SK
X2
CR-566
12.288 MHz
VDLA
VDLB
VVOLV
VSQLV
VDIAL
VVOL
VSQL
UDLA
UDLB
UDIAL
UVOL
USQL
USQLV
UVOLV
F-1
F-5
CHGK
PWRK
K1V
K2V
CTRL5V REG
Q18 2SB1132
IC14 TA78L05F
CTRL HV SW
Q16 2SA1362
Q17 DTC144EU
—15V REG
IC15 TA79L15F
D-RAM
IC9 LH61665AS-60A
TFT LCD INTERFACE
IC6 M52338FP
D9 1SS355
DC-DC
CONVERTER
IC3 M5291FP
Q21 2SB798
D3 SB10-05PCP
X3
CSTC26.25MXJ040
CLKI
G
B
VIDEO AMP
Q11 2SC4081
PD AMP
IC2 TC75S51F
D2 1SV282
R
G
B
M/ESW
SP
MA0 — MA8
MD0 — MD15
XTAL
EXTAL
NTSC/PAL VIDEO CHROMA
IC16 M52045FP [EUR], [ITA]
M52042FP Other
INVERTER
IC19
TC7W04FU
EXTV
CHG/L
RES
F-2
F-3
F-4
F-6
F-7
F-8
X1
CR-641 (4.433619 MHz) [EUR], [ITA]
CR-640 (3.579545 MHz) Other
+5V REG A/B/C
IC17, IC22, IC23
TA78L05F
×
3
R
G
B
CTRL5V
—15V
—15V
—15V
J2
1
2
3
4
5
6
J4
13.8V
—15V
13.8V
+3V REG
D10
MA8030
CFL
BACK LIGHT
+5VA
+5VB
+5VC
—3V REG
D11 MA8030
+5VC
+5VC
+5VB
+5VC
+4V REG
D14 MA8047
+3V REG
D12
MA8033
+5VC
—15V
+5VA
+4V REG
D13 MA8043
CTRL5V
1
2
3
4
5
6
1
2
3
4
5
6
RESET
IC11 S-80945ANMP-DD9
CFL DRIVE
Q14, Q15 2SC3647
×
2
Q19 DTC144EU
Q20 2SA1362
TFT COLOR LCD
DS1 EDTCA22QB0
STH1, DEH, Q2H,
CPH1, CPH2, CPH3,
CPV, STV1
R
TFT CONTROLLER
IC1 MN83951
IC7 TCW14FU
D1 1SS355
VCOM DIAMOND AMP
Q1, Q4 2SC4081
×
2
Q2, Q3 2SA1576
×
2
VGL DIAMOND AMP
Q5, Q8 2SC4081
×
2
Q6, Q7 2SA1576
×
2
TDATA BUFFER AMP
Q12 2SC4081
RDATA BUFFER AMP
Q13 2SA1576
TXD
RXD
POWER
D0 — D7
A0 — A18
WAIT
LRES
COLOR GRAPHICS
LCD CONTROLLER
IC8 SED1354F0A
OCTAL BUS BUFFER
IC20 TC7S08FU
IC21 TC74AC244F
WR, RD, FAI
PWRS
IN/EXT
CONTV
BRITV
RDATA
GND
SP
SPE
HV
TDATA
CONTROL UNIT
CS, WR, RD, F
A
I
10 - 1
SECTION 10 BLOCK DIAGRAM