Icom IC-R8500 Service Manual page 5

SECTION
2
INSIDE
VIEWS
• MAIN, RF-B
AND
MIX UNITS
AM
demodulator
-
(015: 1SS375)
•
WFM
demodulator
(IC2:
MC3356DW)
AF
power
(IC21:
MPC1214H)
SSB,
ON
demodulator
(IC7:
pPCl037GR)
FM
demodulator
{IC8:
MC3372SVM)
Bandpass
inter
(500-1025
Bandpass
inter (242.
Bandpass
inter
(90-242.
i
Bandpass
lilier
(30-90
RF-B
unit
Mam CPU
(IC33: HD6433334YL01P)
mixer
(IC6:
PPC1037GR}
unit
mixer
(ICitCBSOlMl)
>
Bandpass
inter
(R1:
EZF-E778BT13)
- Notch
filter
(FI2;
E2F.E757AT11)
•
PLL,
CONV AND
RF-A UNITS
CONV
unit
RF
converter
(IC2:
5MXF25-7)
RF
amplifrer
MC1:GN1017.
^
I
IC3:
pPC2708tJ
PLL
IC
(IC4;
MC145190)
3rdLO
DOS
IC
(IC13: SC-1287)
8F0 DOS
IC
(IC15: SC-1287)
Reference
oscillator
—
(Xl:CR-452 30-2
MHz)
DOS
IC
(103:
SC-1245)
RF-A
unit
Antenna
switch relay
(RL1:
MZ-12HG)
—
1st
mixer
(Q6.
Q7:2SK2171)
2nd
mixer
circuit
VCO-A
board
IC
(ICIO;
MC145190)
-PLL
unit
Bandpass
filler
(FI1:48M15A)
IC
(IC5:
MC145190)
VCO-B
board
2-1