Inside Views - Icom IC-04A Service Manual

2-2
INSIDE
VIEWS
S)l*«
b
^ k i
b
^njffisutp
w m
«
«
d
Jftb
IfflfiJP '
i^eQ2
HBDl
^A&06
PLL UNIT
MAIN UNIT
CircuLt
Protector
Heatsink
BL101
IC
202
RF
Power
Amp
(SG 1026
)
AF
Power
Amp
Circuit
iClOl (pPC
353 C
Mic Signal
Low-pass
Filter}
I
Cl 05
{TA 75393
P
Low Battery Sensor)
21..aiVlHi Filter
IC
103 Sousich Control
ITC
4
O 09
}
VCO
Unit
BT
101
(BRZ 325 IHC
Lithiurr;
Battery)
Dual Modulous
Prescalar
I
IC
204 PLL
1
C
I
IIPD 2834
)
Voltage Regulator Circuit
X 203
Reference
DSC
I I
2
03
Prescaler
7
(VPB571)
LOGIC UNIT
TONE
UNIT
{1C-04AT
only)
IC
501
DTMF
Encoder
(LR 40
e?)
Initial
Matrix
X
502
CTCSS OSC
(3.G79545MHI)
IC401
MPU
(H0 44795600}
IC
503
CTCSS
Encoder
(S-
7110
A)
XS
01
DTWtF
OSC
{
3
.
58
MHz)
Speaker
TONE CALL
UNIT
HC-04E
only(
X
601
{
7
.
16
SOMHZOSC)
iceoi Divider
{TC
50
S2 P}
2-2