Pll And Main Units - Icom IC-726 Service Manual

2-1
PLL
AND
MAIN
UNITS
Main
loop
vCOs
S V
DC-DC
converter
circuit
converter
{IC12;
ME4CI52M-GJ
Cl'V interface
Cl'V
diode
[tiairiK
CPJ
{IC8;
HD&3A01V0G83P)
Phase
delectorfPrescaler
Lllhlum backup
battery
+
5
V
regulator
£IC10;
TA?Sa06APj
Sensor
circuit
Snd
1.0 circuit
Band
voltage buffer
[IC9l
M545G2P)
Reference
crystal
30,72
MHz)
Divider (IC15;
M74ALS74AP)
Prearr>pllller circuit
Rx
1
St
mixor
circuit
APC7ALC
circuit
Tx
2nd
mixer
circuit
BFO
circuit
SSe
modulator
(IC6:
pPC1f>37HA)
Molae
bianher circuit
Product detector
(IC3:
UPC1M7HA)
Rx 2nd/Tx
1st
mixer
{PCI
:
MD4B7C1.3R)