Sony SDP-EP70 Service Manual page 22

THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• 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
specified.
• The resistance indicated MF shows tolerance 2%.
• : internal component.
¢
• 1 : fusible resistor.
• 5 : fusible resistor.
• C : panel designation.
Note: The components identified by mark ! or dotted
line with mark ! are critical for safety.
Replace only with part number specified.
• U : B+ Line.
• V : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
∗
: Can not be measured.
• 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 pro-
duction tolerances.
• Circled numbers refer to waveforms.
• Signal path.
a
: RF (AC-3)
L : digital in
c : digital out
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : parts mounted on the conductor side.
p
• : Through hole.
®
• : internal component.
¢
• 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 the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
1
/ W or less unless otherwise
4
WAVEFORMS
– MAIN BOARD (1/4) –
1
7.17MHz
IC423 %¡ (SCKR)
2
4.18MHz
IC423 $ª (SCKT)
3
3MHz
IC423 @¶ (EXTAL)
4
129kHz
IC201 9 (FL-CLK)
5
16MHz
IC201 2 (XTAL)
6
65kHz
IC301 @™ (LRCK)
7
4.16MHz
IC301 @¡ (BCK)
8
8.32MHz
IC301 @º (FS128)
– 27 –
5.6Vp-p
5.2Vp-p
5.2Vp-p
5.2Vp-p
4.6Vp-p
5.6Vp-p
5.6Vp-p
5.6Vp-p