Read Sony STR-DE685 Service Manual online
STR-DE685
22
22
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
•
C
: panel designation.
•
A
: B+ Line.
•
B
: B– Line.
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
no mark : FM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: TUNER (FM/AM)
L
: VIDEO (AUDIO)
I
: VIDEO
J
: CD (ANALOG)
c
: CD (DIGITAL)
• Abbreviation
CND : Canadian model.
AUS
AUS
: Australian model.
JE
: Tourist model.
CH
: Chinese model.
MX
: Mexican model.
SP
: Singapore model.
MY
: Malaysia model.
TW
: Taiwan model.
AR
: Argentine model.
KR
: Korean model.
for printed wiring boards:
• X
: parts extracted from the component side.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
C
B
These are omitted.
E
Q
B
These are omitted.
C
Q
Q
E
B
C
E
Note:
The components identified by
mark
The components identified by
mark
0
or dotted line with mark
0
are critical for safety.
Replace only with part number
specified.
specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
Ne les remplacer que par une
pièce portant le numéro spécifié.
4-7. CIRCUIT BOARDS LOCATION
MAIN board
STANDBY board
AC SELECT board
(E, Tourist model only)
(E, Tourist model only)
VIDEO board
COMPONENT VIDEO board
(Except AEP, UK model)
(Except AEP, UK model)
S-VIDEO board
SPEAKER (B) board
DIGITAL board
POWER SW board
HEADPHONE board
VIDEO3 board
DISPLAY board
JOG board
• Waveforms (DIGITAL Board)
3.4Vp-p
1
IC1101
qd
(CKOUT)
1V/DIV 50nsec/DIV
12.288MHz
3.4Vp-p
2
IC1101
qf
(BCK)
1V/DIV 0.2µsec/DIV
3.07MHz
3.6Vp-p
3
IC1101
wa
(XOUT)
1V/DIV 50nsec/DIV
12.288MHz
5Vp-p
4
IC1501
el
(MCLKI)
1V/DIV 50nsec/DIV
12.288MHz
3.6Vp-p
5
IC1201
qs
(MCLK2)
1V/DIV 50nsec/DIV
13.5MHz
4Vp-p
6
IC1201
qf
(SCKOUT)
1V/DIV 50nsec/DIV
12.288MHz
3Vp-p
7
IC1601
id
(X1)
1V/DIV 50nsec/DIV
20MHz
• Abbreviation
CND : Canadian model.
AUS
AUS
: Australian model.
JE
: Tourist model.
CH
: Chinese model.
MX
: Mexican model.
SP
: Singapore model.
MY
: Malaysia model.
TW
: Taiwan model.
AR
: Argentine model.
KR
: Korean model.
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