Sony HCD-RV222 Service Manual page 30

HCD-RV222
Ver. 1.1
QQ
3 7 63 1515 0
• NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : 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
(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.
• Indication of transistor.
C
Q
These are omitted.
B E
Q
B C E
These are omitted.
Q
B C E
These are omitted.
TE
L 13942296513
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to about
350 °C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may also
be added to ordinary solder.
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Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
specified.
• 2 : nonflammable resistor.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• A : B+ Line.
• B : B– Line.
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– BD49 Board –
no mark : CD PLAY
– VMP43GY Board –
no mark : VIDEO CD PLAY
∗
: Impossible to measure
– Other Sections –
no mark : FM
( ) : CD PLAY
∗
: Impossible to measure
• 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.
Q Q
3 6 7 1 3 1 5
• Circled numbers refer to waveforms.
• Signal path.
F
: AUDIO
J
: CD PLAY (AUDIO)
E
: TAPE PLAY (DECK-A)
d
: TAPE PLAY (DECK-B)
G
: REC
f
: AUX
L : CD PLAY (VIDEO)
• Abbreviation
TH: Thai model
co
.
9 4 2 8
1 / W or less unless otherwise
4
0 5 8 2 9 9 4 2 8
m
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