Download STR-K890

STR-K890
SECTION 4
DIAGRAMS
• Circuit Boards Location
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 1/4 W or less unless otherwise
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 under 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
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:
(Side B)
Parts face side:
(Side A)
STANDBY board
DCDC board
VIDEO board
POWER KEY board
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
HDMI SW board
• Indication of transistor.
DCAC board
C
DIGITAL board
Q
These are omitted.
B E
HEADPHONE board
VIDEO 3 board
B C
E
MAIN board
These are omitted.
DISPLAY board
• Waveforms
– DIGITAL Board –
1 IC1501 9 (MCLK1)
3.2 Vp-p
72 ns
1 V/DIV, 40 ns/DIV
2 IC1101 id (X1)
4 Vp-p
41.6 ns
1 V/DIV, 20 ns/DIV
3 IC1301 ws (XIN)
4.1 Vp-p
81 ns
1 V/DIV, 40 ns/DIV
STR-K890
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