13
13
STR-K685
STR-K685
• Circuit Boards Location
SECTION 4
DIAGRAMS
For Schematic Diagrams.
Note:
• All capacitors are in
µ
F 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.
•
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 M
Ω
).
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
• Abbreviation
AR
: Argentine model
E51
: Chilean and Peruvian models
MX
: Mexican model
SP
: Singapore model
SP6
: Singapore and Malaysia models
TH
: Thai model
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.
• Indication of transistor.
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.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
• Waveforms
– DIGITAL Board –
1
IC1905
9
(MCLK1)
1 V/DIV, 40 ns/DIV
72 ns
3.5 Vp-p
2
IC1101
id
(X1)
1 V/DIV, 20 ns/DIV
41.6
n
s
4.2 Vp-p
3
IC1301
ws
(XIN)
1 V/DIV, 40 ns/DIV
81.4 ns
4.2 Vp-p
Note: The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
DIGITAL board
MAIN board
DISPLAY board
HEADPHONE board
POWER board
DCAC board
STANDBY board
AC SELECT board (E51)
Ver. 1.2
Summary of Contents for STR-K685
Page 51: ...51 STR K685 MEMO ...
