Sony STR-MD777 Service Manual ▷ View online
– 15 –
4-4.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block.)
Note on 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.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
1
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
no mark : FM
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Circled numbers refer to waveforms.
• Signal path.
F
: TUNER (FM)
E
: MD
d
: TAPE
G
: DVD/VIDEO
J
: CD
Note: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• b
: Pattern of the rear side.
•
Indication of transistor.
B
These are omitted.
C
E
Q
B
These are omitted.
C
E
Q
– 16 –
4.8 Vp-p
2.2
µ
s
800 mVp-p
2.2
µ
s
3.6 Vp-p
32.768 kHz
4.9 Vp-p
2.2
µ
s
3.9 Vp-p
12.5 MHz
• Waveforms
– POWER Board –
– POWER Board –
1
IC401
#•
(X2)
2
IC401
$¡
(XT2)
2
IC601
@¡
(XIN)
2
IC604
@¡
(XIN)
800 mVp-p
2.2
µ
s
– STR FL Board –
1
IC601
@º
(XOUT)
– EDIT FL Board –
1
IC604
@º
(XOUT)
STR-MD777
– 17 –
– 18 –
4-5.
PRINTED WIRING BOARD – MAIN Board –
•
See page 10 for Circuit Boards Location.
• Semiconductor
Location
Ref. No.
Location
D191
A-3
D801
C-1
D802
C-1
D803
C-2
D804
C-2
D805
F-1
D806
E-1
D807
E-3
D811
B-2
D821
F-1
D822
F-1
D823
F-2
D824
F-4
D825
F-3
D826
F-4
D831
D-2
D832
D-2
D833
D-2
D834
A-2
D841
A-3
D842
B-3
D843
B-3
D861
B-2
IC141
E-5
IC142
E-4
IC302
F-6
IC501
A-5
IC821
F-2
Q141
E-5
Q142
E-4
Q143
E-5
Q191
B-3
Q801
E-2
Q802
E-2
Q811
B-2
Q840
B-3
Q841
A-3
Q861
B-2
SYSTEM CONTROL
TAPE CONTROL
CONTROL 1
DVD/
VIDEO
AUDIO
IN
L
R
B
TAPE
AUDIO
IN
L
R
A
TAPE
AUDIO
IN
L
R
MD
AUDIO
IN
L
R
MD
AUDIO
OUT
L
R
CD
AUDIO
IN
L
R
AM
FM75
Ω
ANTENNA
(Page 56)
(Page 28)
(Page 28)
(Page 32)
(Page 32)
(Page 29)
(Page 56)
(Page 28)
STR-MD777
– 19 –
– 20 –
4-6.
SCHEMATIC DIAGRAM – MAIN Board (1/2) –
•
See page 59 for IC Block Diagrams.
(Page 25)
(Page 34)
(Page 33)
(Page 24)
(Page 30)
(Page 21)
Click on the first or last page to see other STR-MD777 service manuals if exist.