Sony ICF-SC1PC, Service Manual, Page: 19 / 35

– 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.