Inside Views; Control Unit; Main Unit - Icom IC-2800H Service Manual

SECTION 2

• CONTROL UNIT

• MAIN UNIT

VHF antenna
switching
(D9*, D16, D18)
VHF APC DET*
(D7, D8: RB706F)
VHF RF amplifier
(Q16: 3SK166)
VHF power module*
(IC1: M67746)
High/Low control IC
(IC5: TA75S01F)
VHF 1st mixer
(Q15: 3SK166)
AF amplifier
(IC12: LA4445)
V-VCO circuit
VHF FM IF IC*
(IC28: TA31136FN)
Main CPU
(IC19: HD6433876N)
EEPROM*
(IC17: X25320SI)

INSIDE VIEWS

2 - 1
* : Located underside of this point
Q15
Q14
Q19
Q20
* : Located underside of this point
SUB CPU
(IC10: HD6433032SK)
CFL drive
(Q14, Q15, Q19*, Q20*)
CPU reset IC*
(IC11: S-80945ANMP-DD9)
LCD controller
(IC8: SED1354F0A)
R-data buffer amplifier*
(Q13: 2SA1576)
T-data buffer amplifier*
(Q12: 2SC4081)
UHF antenna
switch
(D27*, D37,
D39, D72)
UHF APC DET*
(D25, D26: RB706F)
UHF power module*
(IC4: SC-1318)
UHF 1st mixer
(Q42, Q43, D32)
PLL IC*
IC2 M64076AGP
PLL reference oscillator
(X1: CR-549 15.2 MHz)
U-VCO circuit
UHF FM IF IC*
(IC8: TA31136FN)
MIC amplifier*
(Q88: 2SC4081)