Sony XM-752EQX Service Manual ▷ View online
XM-752EQX
– 17 –
– 18 –
3-7. PRINTED WIRING BOARD — EQ SECTION —
3-6. SCHEMATIC DIAGRAM — EQ SECTION —
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
2
: nonflammable resistor.
•
U
: B+ Line.
•
V
: B– Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from +12V and REMOTE terminals.
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
: AUDIO
(Page 13)
(Page 13)
Ref. No.
Location
IC105
B-1
IC106
B-2
IC107
A-3
IC108
B-3
IC109
A-5
IC110
A-5
• Semiconductor
Location
(Page 11)
– 19 –
– 20 –
XM-752EQX
3-8. PRINTED WIRING BOARD — IND SECTION —
3-9. SCHEMATIC DIAGRAM — IND SECTION — • Refer to page 23 for IC Block Diagrams.
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from +12V and REMOTE terminals.
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
(Page 13)
( ) : SIDE B
Ref. No.
Location
IC802
A-2
(LD801)
B-4
(LD802)
A-4
(LD803)
B-3
(LD804)
A-3
(LD805)
B-3
(LD806)
A-3
(LD807)
B-3
(LD808)
A-3
(LD809)
B-3
(LD810)
A-3
(LD811)
B-2
(LD812)
A-2
(LD813)
B-2
(LD814)
A-2
• Semiconductor Location
Ref. No.
Location
(LD815)
B-2
(LD816)
A-2
(LD817)
B-2
(LD818)
A-2
(LD819)
B-1
(LD820)
A-1
(LD821)
B-1
(LD822)
A-1
(LD823)
B-1
(LD824)
A-1
Q801
A-3
Q802
A-1
Q803
A-3
Q804
A-1
Note on Printed Wiring Board:
• Y
: parts extracted from the conductor side.
•
r
: Through hole.
• b
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
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)
(Side A)
parts face are indicated.
(Page 11)
XM-752EQX
– 21 –
– 22 –
3-10. PRINTED WIRING BOARD — LED SECTION —
3-11. SCHEMATIC DIAGRAM — LED SECTION —
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from +12V and REMOTE terminals.
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
(Page 13)
Ref. No.
Location
D880
B-2
D881
A-1
D882
A-1
(LD825)
A-2
(LD826)
A-1
(LD827)
A-1
Q805
A-2
Q806
A-1
Q807
A-1
• Semiconductor
Location
( ) : SIDE B
Note on Printed Wiring Board:
• Y
: parts extracted from the conductor side.
•
r
: Through hole.
• b
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
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)
(Side A)
parts face are indicated.
(Page 11)
• IC Block Diagrams
IC901 µPC494GS
IC802 BA6820F
– 23 –
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
OSC
REF. REG.
ERROR
ERROR
0.1V
22
21
20
19
18
17
16
15
14
13
12
1
2
3
4
5
6
7
8
9
10
11
D4
D3
D2
D1
O6
O5
O4
O3
O2
O1
VCC
GND
GND
OSC
H.C
MUTE
AC/DC
DC IN
CR2
AC2 IN
CR1
AC1 IN
PEAK HOLD LOGIC
COMPARATOR
SWITCHER
DRIVER
VREF.
I/N
OSC
AMP
AMP
INPUT
INTERFACE
CLOCK
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