Sony CDX-C4840R Service Manual page 27

4-5. CIRCUIT BOARDS LOCATION
DISC IN SW board
tuner unit
(TU601)
LOAD SW board
DISPLAY board
SUB board
LIMIT SW board
MAIN board
SERVO board
– 31 –
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 diagram:
• 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.
• % : indicates tolerance.
• : internal component.
¢
• 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.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• 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.
F : FM
f : MW
J
: CD
• Abbreviation
G : German model.
for printed wiring boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : Through hole.
®
• b : Pattern from the side which enables seeing.
(The other layer's 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.
• Abbreviation
G : German model.
• Waveforms (MODE:PLAY)
1
Approx. 620mVp-p
1
IC2 (FEO)
2
1.2Vp-p
#¡
IC2 (RFO)
3
Approx. 200mVp-p
$™
IC2 (TEO)
4
2.6Vp-p
7.6µsec
3
(MDP)
IC1
5
5.8Vp-p
22.7µsec
@º
(LRCK)
IC1
6
5.7Vp-p
474nsec
@™
(BCK)
IC1
7
3.2Vp-p
16.89MHz
#¢
IC1 (XTAI)
– 32 –
0V
0V