Bloek Diagram - Realistic PRO-2022 Service Manual

BLoeK DIAGRAM
LOW/AIR/HI/RF AH?
+---~ AGC CONT . MIX
f-1.-(
01 02 03
[ill)
o
30-54MHz
108-136HHz
136 .005-174HHz
10.7HHZ
IF AH?
I--~
018
CRYSTAL
FILTER
AGC
10 .245MHz
,.....-i ' o
' h
, ,
OSC MIXER
IF AH?
O UAORAT URE .OET
NOlSE AH?
ICI
I
SOUELCH
I
>
I-
369 .3-501 .3MHz 118 .7-167 .1MHz
TRIPLER
lE-....---t
VCO (AIR/HI!
011 UHF LOW)
~
09 010
380-512MHz
UHF LOW RF AH?
MIX
04 05
806-960MHz
8UFFER
08
40 .7-64 .7HHz
VCO (L O W)
06 07
CERAMIC
FILTER
455KHz
AM IF AH?
OET.
022 023
I
,
U H F Hl RF AMP.
M IX
012 013 014
~
- J
816.7-970 .7MHz
00U8LER
016
JE-
408 .35-485.35MHz
VCO (UHF H IJ
015 017
SWITCHING
019
LOW
A IR
H IGH
U HF LOW--.1
UHF Hl --.1
8ANO SELECT
026-32
ZER O MATIC
IC2 024
M U T E
020 021
lY:ïlLïiMEJ
<
>fo
~
,....-------, I;
HEAO
A U OIO AMP . '" PHONE
IC 2 IC3 ~
/
I
t--I--{')
'-'
AC120V
(240V)
RECTIFIER
060
O C 13. 8V
036
,....---t---;. : . - - - ,
0,57
I-.+------t-~
,
---+---(
037
,....--
.
.,
,....---------'
VOLTAGE
REGU LATOR
lC5 040
VOLTAGE
REGULA T O R
rC 4
1 ..------'-------,
OC-OC
CONVERTER
034 035
054-56
MEMORY
(R A M)
IC6
5.6V
CPU
IC7
CPU CONTROL
033 041
Y '
0
' f -J
2HHz
I I I
PLL
rC8
L C D
6.4M Hz
~:O~
LOW PASS FILTER
~--J
036 037 038
I
K EY B OARD
De-AC
CONVERTER
025
LOW BAH .
OET.
rC2
(1/ 4)
9VBAH .
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