Icom IC-M502 Service Manual

SECTION 2 INSIDE VIEWS
2 - 1
2-1 IC-M502
AF power amplifier
(IC14: LA4425A)
FM IF IC
(IC1: TA31136FN)
2nd IF filter
(FI3: ALFY450E)
Main MPU
(IC16: MB90F583BPFV-G)
PLL IC
(IC2: µPD3140GS)
VCO circuit
Drive amplifier
(Q12: 2SC2954)
1st mixer*
(Q3: 3SK166)
Reset IC
(IC15: S-80928ANMP)
* Located under side of the point
Reference oscillator
(X2: CR-659 21.25 MHz)
1st IF filter
(FI1, FI2: FL-310)
Power module*
(IC3: SC-1302)
System clock
X3: DMX-26S 36.768 kHz,
X4: CR-610 7.9872 MHz
• LOGIC UNIT
System clock
(X1: CSTCC4.91MG 4.91 MHz)
Speaker
SUB MPU
(IC1: µPD789405AGK-A30-9EU)
LCD driver
(IC2: HD66712SA03FS)
DIAL UNIT
SQL UNIT
VOL UNIT
• MAIN UNIT

Icom IC-M502 Specifications

General

Brand	Icom
Model	IC-M502
Category	Transceiver
Language	English