Read Sony STR-DE245 / STR-DE345 Service Manual online
9
9
For schematic diagrams.
Note:
Note:
• 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.
•
%
: indicates tolerance.
•
f
: internal component.
•
2
: nonflammable resistor.
•
1
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages 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 production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
J
: CD
g
: VIDEO
I
: PHONO
• Abbreviation
CND : Canadian model.
AUS
AUS
: Australian model.
SP
: Singapore model.
MY
: Malaysia model.
AR
: Argentine model.
CH
: Chinese model.
MX
: Mexican model.
CIS
: Russian model.
EA
: Saudi Arabia model.
EE
: East European model.
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
Note:
The components identified by
mark
The components identified by
mark
!
or dotted line with mark
!
are critical for safety.
Replace only with part number
specified.
specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
!
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.
• Waveform
– MAIN SECTION –
– MAIN SECTION –
– PANEL SECTION –
For printed wiring boards.
Note:
Note:
• X
: parts extracted from the component side.
•
a
: Through hole.
•
f
: internal component.
• b
: Pattern from the side which enables seeing.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
3-4. CIRCUIT BOARDS LOCATION
Pin No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71 – 74
75 – 78
79
80 – 84
85 – 90
91 – 100
Pin Name
REAR-RY
CTR-RY
FRONT-RY
H/P-RY
WOOFER RY
SYS.POWER
P115
P114
FUNC.MUTE
P112
SP SW
P110
SET UP LED
NAME LED
LEVEL LED
SURR LED
P103
S.FIELD LED
B.B. LED
P100
P97 – P94
S15 – S12
VLOAD
S11 – S7
S6 – S1
DIG10 – DIG1
Description
Control rear relay on/off
Control center relay
Control speaker relay
Control Headphone relay
Control Woofer relay
Detect power switch key
Control muting circuit
Read speaker switch comdition
Control Setup LED
Control Name LED
Control LEVEL LED
Control SURR LED
Control SF LED
Control Bass Boost LED
Output signal to FL tube
Negative power supply
Output signal to FL tube
Output signal to FL tube
I/O
O
O
O
O
O
I
—
—
O
—
I
—
O
O
O
O
—
O
O
—
—
O
I
—
O
O
STANDBY board
POWER SWITCH board
HEADPHONE board
DISPLAY board
ENCODER board
TUNING board
MAIN board
VIDEO board
SECONDARY board
PRIMARY board
VOL-SEL board
1
IC1
qf
2.2Vp-p
230ns
2
IC103
qa
5.0Vp-p
200ns
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