Icom IC-R8500 Service Manual

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

Icom IC-R8500 Specifications

General

Antenna Impedance	50 Ω
Power Supply	13.8 V DC ±15%
Mode	AM, FM, WFM, CW
Channels	1000
Tuning Steps	10 kHz
Dynamic Range	100 dB
IF Output	10.7 MHz
Antenna Input	SO-239