Sony XM-7527 Service Manual ▷ View online
XM-7527
9
9
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM – AMPLIFIER SECTION –
5
7
6
7
8
8
12
12
11
11
5
7
6
7
6
7
5
6
7
7
DIFFERENTIAL
AMP
Q104,106
DIFFERENTIAL
AMP
Q103,105
POWER AMP
(VOLTAGE STAGE)
Q108
BIAS
VR101
OVERLOAD
Q112,113
OVERLOAD
Q114-115
OFFSET
DET
Q812-814
CNJ805
6
3
5
4
1
9
7
8
CNP804
POWER AMP
(VOLTAGE STAGE)
Q107
POWER AMP
(FINAL STAGE)
Q110-111
NFB ON
NFB OFF
RY801(1/2)
DIRECT
SW802(1/2)
LINE SWITCH
Q102
LINE SWITCH
Q101
LOWBOOST
IC102(1/2)
LOWBOOST
IC102(2/2)
POWER
DRIVE
Q942
THERMAL
DET
TH803
POWER
CONTROL
Q941
INVERTER
Q943
R-CH
R-CH
CN807
SPEAKER OUT
ON
OFF
PRE AMP
IC801(1/2)
H.P.F
IC802(1/2)
H.P.F
IC101(2/2)
IC201(2/2)
IC201(2/2)
L.P.F
IC803
L.P.F
IC101(1/2)
IC201(1/2)
IC201(1/2)
LEVEL
VR801(1/2)
FILTER
VR804
FILTER
VR804
CNP806
CNJ806
CNJ806 CNP806
HPF
LPF
FLAT
INVERTER
Q944
B+
B-
T902
D942
D944
D946
D948
D947
D945
D943
D943
D949
R-CH
R-CH
L-CH
TO
POWER
BOARD
CNB804
09
FILTER BOARD
AMPLIFIER BOARD
3
1
TEST TONE AMP
IC804(1/2)
TEST TONE AMP
IC804(2/2)
FILTER
ON
OFF
B+
SW803
L
L+R
MONO
R
INPUT
(M0N0)
OUTPUT
(THROUGH)
L
INPUT
OUTPUT
(THROUGH)
R
2
5
7
6
TEST TONE
S805
NFB
S804
1
1
VR802
(2/4)
VR802
(1/4)
5
6
BOOST/LOWCUT
FREQ
VR802
+28V
TO
POWER
BOARD
POWER
BOARD
B+
-28V
B-
• Signal path
: Audio
XM-7527
10
10
5-2. BLOCK DIAGRAM – POWER SECTION –
7
8
9
2
4
6
5
CNB804
CNJ802
CNJ801
TO
AMPLIFIER
BOARD
CNP804
GND
REMOTE
4
3
1
2
5
7
5
7
CNP803
POWER BOARD
OFFSET CONTROL
Q805-806
OFFSET LED
SWITCH
Q811
THERMAL DETECTOR
TH801
THERMAL DETECTOR
TH802
B+ SWITCH
Q904
B+ SWITCH
Q902
THERMAL
CONTROL
CONTROL
Q801
THERMAL
SWITCH
Q802
THERMAL
LED SWITCH
Q809
11
10
1
2
15
16
3
8
9
12
14
REF-REG
THERMAL SWITCH
TH901,Q915
DRIVER
Q906
INVERTER
Q910,912,914
DRIVER
Q905
INVERTER
Q909,911,913
T901
SWITCHING
CONTROL
Q907-908
Q907-908
F902 (25A)
F901 (25A)
S801
HI-V
HI-C
+28V
-28V
TO
AMPLIFIER
BOARD
AMPLIFIER
BOARD
D904
D903
IC902
DC DET
IC903
DC SWITCH
DC-DC
CONVERTER
IC901
OVER CURRENT
CONTROL
Q807-808
Q807-808
OVER CURRENT
LED SWITCH
Q810
D803
OR
D806
OR
D802
S801
MODE
HI-C
HI-V
S801
D905
D906
HI-V
HI-C
D845
HI-VOLTAGE
D844
HI-CURRENT
D843
OVER CURRENT
G
1
7
G
G
R
D842
OFFSET
G
R
D841
THERMAL
G
R
B+
Q843
SWITCH
Q842
SWITCH
Q841
SWITCH
CNB803
LED BOARD
09
MODE
MODE
+12V
B+ SWITCH
Q903
POWER ON/OFF
D901,Q901
REGULATOR
D804,Q803-804
B+
B-
1
4
3
2
1
4
3
2
XM-7527
11
11
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 diagrams.
Note:
• 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.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from +12V and REMOTE terminals.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark: POWER ON
no mark: POWER ON
*
: Impossible to mersure
• 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.
• Signal path.
F
: AUDIO
For printed wiring boards.
Note:
• X
: parts extracted from the component side.
5-3. IC BLOCK DIAGRAM
• POWER section
IC901
IC901
µ
PC494G2
4
1
2
3
5
6
7 8
9
10
16 15
14
13
12 11
ERROR
0.1V
REG.
REF.
OSC
ERROR
XM-7527
12
12
5-4. PRINTED WIRING BOARD – FILTER/AMPLIFIER SECTION –
• Semiconductor Location
Ref. No.
Location
D101
I-6
D102
I-7
D103
E-4
D104
F-4
D201
I-4
D202
I-4
D203
E-3
D204
F-3
D846
G-5
D861
D-9
D941
H-1
D942
E-2
D943
E-1
D944
E-2
D945
E-1
D946
E-1
D947
E-2
D948
E-2
D949
E-1
D950
I-2
D951
H-2
IC102
B-5
IC202
B-4
IC801
C-2
IC802
B-4
IC804
D-9
Q101
A-5
Q102
B-3
Q103
H-6
Q104
H-7
• Semiconductor
Location
Ref. No.
Location
IC101
C-2
IC201
B-2
IC803
B-3
Q105
H-6
Q106
H-7
Q107
I-6
Q108
I-7
Q110
J-8
Q110
J-8
Q111
J-6
Q112
F-7
Q113
F-7
Q114
G-7
Q115
G-7
Q201
B-4
Q202
A-4
Q203
H-3
Q204
H-4
Q205
H-3
Q206
H-4
Q207
I-3
Q208
I-4
Q210
J-4
Q211
J-3
Q212
F-4
Q213
F-3
Q214
G-3
Q215
G-3
Q812
D-8
Q813
D-8
Q814
D-8
Q941
J-1
Q942
H-2
Q943
G-2
Q944
G-1
Ref. No.
Location
09
1
A
B
C
2
3
JW002
JW009
JW020
JW013
JW014
JW015
JW016
JW017
JW019
JW018
JW001
JW008
JW012
C1
10
JW01
1
C209
JW010
JW003
JW007
JW006
JW005
CNJ806
C108
C111
C109
R216
C211
C208
JR01
R210
R208
R214
R217
R117
JR03
R112
R114
R1
13
C107
R
111
R109
R108
R1
10
R213
JR02
R1
16
C207
R21
1
R856
R212
R209
IC803
IC201
IC101
1-675-243-
11
C210
C112
C212
AMPLIFIER BOARD
CNP806
B
FILTER BOARD
(Page 12)
1
12
S803
FILTER
S804
NFB
VR804
FILTER
(LPF OFF HPF)
(50Hz 200Hz)
(ON OFF)
S803
VR804
S804
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
1-675-244-
11
R875
L903
POWER
BOARD
CNB804
A
(Page 14)
FILTER
BOARD
CNJ806
CNJ806
B
(Page 12)
IDLING
IDLING
TO
POWER
BOARD
BOARD
(Page 14)
AMPLIFIER BOARD
R255
R256
R944
R943
Q942
R259
R941
D941
Q944
Q943
C949
C950
R105
C105
R104
C103
R103
R101
R204
C203
C104
R203
R102
JW051
JW073
JW072
JW071
JW070
JW067
JW039
JW049
JW037
JW036
JW090
JW089
JW066
JW065
JW063
JW061
JW062
JW060
JW059
JW050
C204
R205
C205
R202
IC801
C803
R869
JR15
R225
R224
R206
JR14
R124
JR1
1
JR12
JR13
C206
R207
IC201
R223
R123
JR16
IC202
R218
R219
R107
C106
R106
R222
C215
R221
R220
IC102
R868
R1
18
C1
15
R120
R122
R121
R1
19
R864
C861
IC804
R829
R828
R831
R830
R867
C862
R866
R865
R862
D861
Q814
R863
R861
R874
R873
C869
R872
R871
C868
R155
R156
R145
R159
Q112
R157
Q113
R158
R160
R146
R148
R147
Q115
Q114
C956
C955
R144
R133
R127
R227
R139
R140
R136
R143
R141
C1
19
R129
R128
C120
R132
R142
R135
D102
R130
R131
R137
R138
R134
D101
R232
C957
R945
C958
R946
R126
R226
RY801
D202
R233
R244
R242
R243
R241
R231
R230
R235 R234
C219
R229
R228
C220
D201
C221
C864
R245
D203
R249 R149
R251 R151
R250 R150
R252 R152
R260
Q214
R246
R247
R258
R257
Q213
Q215
Q212
D204
D103
D104
R248
R870
C867
R125
R201
R832
C807
R263
R163
Q813
Q812
E
E
09
C101
C102
C202
C201
C866
C943
C947
C942
C1
17
C217
C216
C218
C865
C1
19
C941
JW132
JW131
C948
C944
C945
C946
JW069
JW054
JW053
JW052
D945
D943
D949
D946
D947
D948
D942
D944
T902
JW076
JW068
JW086
JW087
JW088
JW113
JW114
JW115
JW064
JW048
JW046
JW044
JW042
JW047
JW039
JW041
JW045
JW057
JW058
JW056
JW040
JW043
JW075
JW074
CNP806
JW034
JW033
JW028
JW027
JW026
JW025
JW024
JW023
JW035
JW022
JW021
JW032
JW031
JW030
JW029
C953
C954
C1
18
R238
R237
R236
R239
R240
VR201
VR101
Q941
Q209
Q211
D950
D951
JW129
JW130
JW128
JW129
JW126
JW125
JW124
JW123
JW1
1
9
JW122
JW1
1
8
TH803
JW1
1
0
JW1
1
2
J
W
111
Q107
Q111
Q103
Q105
Q106
Q109
Q110
Q104
Q108
C121
JW092
JW093
JW094
JW107
JW103
JW104
JW082
JW080
JW081
E
E
E
JW079
JW083
JW102
JW101
JW001
JW096
JW095
JW099
JW098
JW097
JW109
JW085
JW084
JW108
Q207
Q203
Q205
Q206
Q204
Q208
JW116
JW117
JW120
JW121
JW091
JW106
JW105
CNP804
1
R266
C222
C122
C952
C951
R265
R264
R166
R165
R164
C808
E
E
E
C1
13
C1
14
C213
C214
Q101
Q201
Q102
Q202
E
B
JW078
JW077
+28V
GND
-28V
R254
R261
R154
R161
CNJ805
S802
VR803
VR801
VR802
S805
JW055
G
S
G
S
G
S
G
S
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
D846
L
TEST TONE
L+R
MONO
R
R
L
SPEAKER
OUT
CN807
S802
DIRECT
(ON OFF)
VR801
LEVEL
(MIN MAX)
VR803
BOOST
LEVEL
(0dB 40dB)
VR802
BOOST
LOW CUT
FREQ
(7Hz 40Hz)
OUTPUT
R
L
INPUT
(THROUGH)
(MONO)
CNJ805
E
E
E
E
Q210
BLK
+15V
BLU
MUTE
BLU
OFFS
BLU
H-V
BLU
H-C
BLU
FAN
BLU
TH
BLU
+B
BLU
GND
1
12
E
9
C962
C963
C964
C965
R947
R948
R948
C966
R944
C961
C959
R943
C960
C967
D206
D205
D106
D105
L904
L905
L907
L906
L908
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