Icom IC-M412 Service Manual page 5

SECTION 2
• LOGIC-A UNIT
• MAIN-A UNIT
<CH70 RX>
IF IC (IC14)
<CH70 RX>
2ND IF FILTER
(FI6)
<CH70 RX>
DISCRIMINATOR
(X4)
MIC AMP, IDC, LPF
(IC8: NJM4558M)
AF SWITCH
(IC4)
DSC DECODER
INSIDE VIEWS
CPU CLOCK
(X1)
BACKLIGHT DRIVER
(Q1)
<CH70 RX>
1ST IF FILTERs (FI4, 5)
TX/CH70 RX VCO
(IC14)
PHOTO COUPLER
(IC5)
LCD DRIVER
(IC8)
EEPROM
CPU
(IC3)
(IC1)
RF PA MODULE (IC3)
RX VCO
REF. OSCILLATOR
(X1)
<MAIN RX>
PLL IC
2ND IF FILTER
(IC1)
(FI3)
2 - 1
FRONT SPEAKER
(SP1)
DUAL OP AMP (as a buffer)
(IC2)
<MAIN RX>
TUNED BPFs
<MAIN RX>
1ST IF FILTERs
(FI1, 2)
<MAIN RX>
DISCRIMINATOR
(X2)
<MAIN RX>
IF IC (IC2)