Read Sony ICF-CD831 / ICF-CD831L Service Manual online
ICF-CD831/CD831L
17
17
MAIN BOARD (1/2)
20
CF1
24
23
21
12
8
7
4
14
FM
DET
AM
OSC
AM
MIX
FM
OSC
FM
MIX
AM
DET
VREG
ICF-CD831L (3-BAND: AEP, UK MODEL)
ICF-CD831 (2-BAND: CND, AUS, IT, MX, CET MODEL)
Q2
LPF2
VREG
CF2
IT MODEL
AEP MODEL
AM OSC
L2
L5
CT2
CV1-2
L3
CT3
CV1-3
VREG
MIX
OUT
MPX
IN
T1 AM IFT
T2
FM DET
IC1
FM/MW/LW FRONTEND
IF AMP,DET
LOUT
ROUT
DET
OUT
VREG
VREG
VREG
VREG
VREG
AM
IF
IN
IF
IN
FM
IF
IN
IF
IN
FM
RF
IN
RF
IN
AM RF IN
FM RF OUT
FM OSC
AF
ST/MO
FM/AM
TU-R
TU-L
A
13
DECODE
18
17
16
19
ANT1
(FM)
L1
MW/LW ANT
S1-1
BAND SW
1
S1-2
BAND SW
T1
MW IF
T2
FM IF
T1
AM IF
T2
FM IF
CT1,L1-1
MW
TRACKING
CT1,L1
AM
TRACKING
CT6,L1-2
LW
TRACKING
CT2,L2
FM
TRACKING
CT5,L3
LW
FREQUENCY
COVERAGE
CT4,L4
AM
FREQUENCY
COVERAGE
CT3,L5
FM
FREQUENCY
COVERAGE
CT2,L2
FM
TRACKING
CT3,L5
FM
FREQUENCY
COVERAGE
CT4,L4
MW
FREQUENCY
COVERAGE
BPF1
FM
L1-2
L1-1
CT1
CV1-1
CT6
CT5
CT4
CV1-4
L4
MW
LW
FM
MW
LW
MAIN BOARD (1/2)
20
CF1
24
23
21
12
8
7
4
14
FM
DET
AM
OSC
AM
MIX
FM
OSC
FM
MIX
AM
DET
LPF2
VREG
CF2
AM OSC
L2
CT2
CV1-2
L5
CT3
CV1-3
VREG
MIX
OUT
MPX
IN
T1 AM IFT
T2
FM DET
IC1
FM/AM FRONTEND
IF AMP,DET
LOUT
ROUT
DET
OUT
VREG
VREG
VREG
AM
IF
IN
IF
IN
FM
IF
IN
IF
IN
FM
RF
IN
RF
IN
AMRF IN
FM RF OUT
FM OSC
AF
ST/MO
FM/AM
TU-R
TU-L
A
13
DECODE
18
17
16
19
ANT1
(FM)
1
S1
BAND SW
BPF1
CT4
CV1-4
L4
MW FM
VREG
CV1-1
CT1
L1
AM ANT
• Signal path
: FM
: AM
• Abbreviation
CND : Canadian model
AUS : Australian model
IT
AUS : Australian model
IT
: Italian model
MX
: Mexican model
CET : East European & CIS model
5-4. BLOCK DIAGRAM — TUNER SECTION —
(Page 18)
(Page 18)
Ver 1.2
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