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Q Q
3 7 6 3 1 5 1 5 0
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. (p: pF)
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.
•
f
: internal component.
• 2 : nonflammable resistor.
• 5 : fusible 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.
• Voltages and waveforms are dc with respect to ground un-
der no-signal (detuned) conditions.
No mark : FM
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
J
: ANALOG
c
: DIGITAL
I
: VIDEO
T E
L
1 3 9 4 2 2 9 6 5 1 3
w w w
STR-K890
SECTION 4
DIAGRAMS
For Printed Wiring Boards.
Note:
• X : parts extracted from the component side.
•
a
: Through hole.
•
f
: internal component.
•
: 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.
• Indication of transistor.
C
Q
These are omitted.
B
E
B
C E
These are omitted.
x
a o
y
.
i
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8
• Circuit Boards Location
POWER KEY board
DCAC board
HEADPHONE board
Q
Q
3
7
6
3
• Waveforms
– DIGITAL Board –
1
IC1501 9 (MCLK1)
72 ns
1 V/DIV, 40 ns/DIV
2
IC1101 id (X1)
41.6 ns
1 V/DIV, 20 ns/DIV
3
IC1301 ws (XIN)
u 1 6 3
.
81 ns
1 V/DIV, 40 ns/DIV
13
13
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2
4
9
9
8
STANDBY board
DCDC board
VIDEO board
VIDEO 3 board
DISPLAY board
1
5
1
5
0
8
9
2
4
3.2 Vp-p
4 Vp-p
m
c o
4.1 Vp-p
STR-K890
2
9
9
HDMI SW board
DIGITAL board
MAIN board
9
8
2
9
9
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