Read Sony SPK-DVF5 Service Manual online
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SPK-DVF5
SECTION 1
PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
(Measuring conditions voltage and waveform)
• Power voltage is dc 6 V and fed with regulated dc power supply
from CN001 pin
1
.
(VOM of DC 10 M
Ω
input impedance is used.).
• Voltage values change depending upon input impedance of VOM
used.)
THIS NOTE IS COMMON FOR WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block)
(In addition to this, the necessary note is printed in each block)
C
B
E
5
6
4
2
1
3
5
4
6
2
3
1
4
5
2
3
1
1
2
4
5
3
3
2
1
3
2
1
3
2
1
Transistor
Diode
Kinds of capacitor
Temperature characteristics
External dimensions (mm)
(For printed wiring boards)
•
•
b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Through hole is omitted.
• Circled numbers refer to waveforms.
• There are few cases that the part printed on diagram isn’t
• Circled numbers refer to waveforms.
• There are few cases that the part printed on diagram isn’t
mounted in this model.
• Chip parts.
(For schematic diagrams)
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF :
µµ
F. 50V or
less are not indicated except for electrolytics and tantalums.
• Chip resistors are 1/10W unless otherwise noted.
k
Ω
=1000
Ω
, M
Ω
=1000k
Ω
.
• Caution when replacing chip parts.
New parts must be attached after removal of chip.
Be careful not to heat the minus side of tantalum capacitor, Be-
cause it is damaged by the heat.
Be careful not to heat the minus side of tantalum capacitor, Be-
cause it is damaged by the heat.
• Some chip part will be indicated as follows.
Example
C541
L452
22U
10UH
TA A
2520
• Constants of resistors, capacitors, ICs and etc with XX indicate
that they are not used.
In such cases, the unused circuits may be indicated.
In such cases, the unused circuits may be indicated.
• All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
• Signal name
XEDIT
→
EDIT
PB/XREC
→
PB/REC
•
C
: panel designation
•
U
: B+ Line
•
J
: IN/OUT direction of (+,–) B LINE.
Note :
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
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