Sony ICD-B17 Serivce Manual page 10

ICD-B17
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
Common Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1 / W or less unless otherwise
4
specified.
• : internal component.
f
• C : panel designation.
• A : B+ Line.
• Power voltage is dc 3V and fed with regulated dc power
supply from battery terminal.
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : PB
( ) : REC
• Voltages are taken with a VOM (Input impedance 10 MΩ).
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.
• Signal path.
E : PB
a : REC
Common Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : internal component.
f
• : Through hole.
z
• : Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the pattern face side seen from
(SIDE B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(SIDE A) the parts face are indicated.
• Lead Layouts
Lead layout of conventional IC
• Waveforms
1 0.5V/div 0.1µsec/div
1.0Vp-p
3.98MHz
IC101 ta (XOUT)
1.0V/div 10µsec/div
2
2.2Vp-p
32.768kHz
IC704 1 (32KOUT)
3 0.5V/div 10µsec/div
1.2Vp-p
32.768kHz
8
IC704 (OSCOUT)
1.0V/div 0.2µsec/div
4
3.2Vp-p
5MHz
IC703 ul (X2)
10 10