DOWNLOAD Sony ICF-SC1 / ICF-SC1PC Service Manual ↓ Size: 1.89 MB | Pages: 35 in PDF or view online for FREE

Model
ICF-SC1 ICF-SC1PC
Pages
35
Size
1.89 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icf-sc1-icf-sc1pc.pdf
Date
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Sony ICF-SC1 / ICF-SC1PC Service Manual ▷ View online

– 17 –
– 18 –
ICF-SC1/SC1PC
• Signal path.
F
5-2. BLOCK DIAGRAM
– 21 –
– 22 –
5-4. SCHEMATIC DIAGRAM – IF SECTION –
ICF-SC1/SC1PC
Note:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
Ω
 and 
1
/
4
 
W or less unless otherwise
specified.
•
U
: B+ Line.
• Power voltage is dc 6 V and fed with regulated dc power
supply from external power voltage jack (J402).
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : WFM/AM/NFM
(
) : AM/NFM
<
> : NFM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
r
 Refer to page 33 for IC Block Diagrams.
– 25 –
– 26 –
r
 WAVEFORMS
2
IC604   
&ª
VOLT/DIV :  1 V AC
TIME/DIV : 0.2 msec
1
IC604  
*™
VOLT/DIV :  0.2 V AC
TIME/DIV : 20 msec
0.5Vp-p
32.7 
µ
sec
2Vp-p
0.24 
µ
sec
Note:
• X
: parts extracted from the component side.
•
D
: Chip components extracted from the rear side.
•
r
: Through hole.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
 Caution:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side)
the parts face are indicated.
Note:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
Ω
 and 
1
/
4
 
W or less unless otherwise
specified.
•
U
: B+ Line.
• Power voltage is dc 6 V and fed with regulated dc power
supply from external power voltage jack (J402).
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : WFM/AM/NFM
(
) : AM/NFM
<
> : NFM
ICF-SC1/SC1PC
r
 Refer to page 33 for IC Block Diagrams.
5-6. SCHEMATIC DIAGRAM – MICROCOMPUTER SECTION –
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
– 29 –
– 30 –
Note:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
Ω
 and 
1
/
4
 
W or less unless otherwise
specified.
•
U
: B+ Line.
• Power voltage is dc 6 V and fed with regulated dc power
supply from external power voltage jack (J402).
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : WFM/AM/NFM
(
) : AM/NFM
<
> : NFM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
Note:
• X
: parts extracted from the component side.
•
D
: Chip components extracted from the rear side.
•
r
: Through hole.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
 Caution:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side)
the parts face are indicated.
5-8. SCHEMATIC DIAGRAM – RF SECTION (1/2) –
ICF-SC1/SC1PC
r
 Refer to page 33 for IC Block Diagrams.
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