Sony ICF-6800W - Block Diagram Overview

ICF-6800W
_ICF-6800W
BLOCK DIAGRAM
FM/SW
TEL ANT
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|
fw
ea
REC
OUT
[a0]
Mite FM/AM IF OFF We
\
FM
RF
AMP
FM
MIX
FM
IF
AMP
TANS
99
Qio~12
5
AMP
|
VOLUME
HEADPHONES
°
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ON
AF
AMP
POWER
AMP
ov
Blea | tes ase [7] ame [TD ey
AM
AF
AMP
a
DM
to
=
of
“aor
BFO
OSC
SSB
DET
$2-4
TREBLE
=
012,13
Q7 ,
FM
OSC
AFC
AFC
0
,
0
J3
J
olen
OFF $3-2
@
AGC
oe
Sit [AFC] S2
BPF
19.055MHz
455kH2
ne
+e
Hah
fn
a
IN
Q!
02,3
LN
AN
|
NARROW
—>
‘
MUTING
USB
>
BUFFER
2ND
OSC
52-1
067
04
B+
VRI GAIN CONTRO
18.6MHz)
GAIN vCO-|
Lis
MW
BUFFER
MW
RF
AMP
ri
a
Q14 024
: WeO=I VOLTAGE APPLIED TO
wee Osc VARICAP_ 027
038 037
(19.055MHz~49,055MHz)
ci
STEP
BETWEEN
(0.975MH2~2.075MHz)
28.0
: OOMH2 - 37,000
vc0-2 VoLTage 3 ee yes
osc APP UFFER
VOLTAGE APPLIED 4e WARCAP O68
TO VARICAP 028 D
vCO-2
Nix
_
‘iy
BUFFER a
Q30 Q31 al Q33
VCO-2
BUFFER
is Fat
1OMHz
OSC
RF
AMP
PHASE
DET
SWEEP
050 O51 053~57 058~61
1OMHz AMP
032
4
TIMER
COUNTER
BUFFER ®
Q26 | 025
Fy AM FREQUENCY
i DISPLAY
—21-
:
599°