Sony XM-GS400 Service Manual ▷ View online
XM-GS400
XM-GS400
9
9
3-5. CONTROL BOARD BLOCK
– Bottom side view –
4 CONTROL board block
3
2 two screws
(+B, TT, B-TYPE, 3
u L)
2 two screws
(+B, TT, B-TYPE, 3
u L)
1 fan connector (CN008)
OK
NG
'&IDQZLUHVHWWLQJ
Push wires down to stay in groove.
Both wires not stay in groove.
Wire from DC fan
Wire stay to under
LED board.
LED board.
XM-GS400
XM-GS400
10
10
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
OVER LOAD
DETECT
Q112
PRE AMP
IC801
HIGH-PASS
FILTER
IC151
HIGH-PASS
FILTER
IC152
LOW-PASS
FILTER
IC153
LOW-PASS
FILTER
IC154
MUTING
SWITCH
SWITCH
Q101
DIFFERENTIAL
AMP
Q103
DIFFERENTIAL
AMP
Q102
DRIVE
AMP
Q104
DRIVE
AMP
Q105
POWER
AMP
Q108, 110
POWER
AMP
Q109, 111
RV151
FRONT
SUBSONIC
FILTER
RV153
OVER LOAD
PROTECT
Q803, 804
Q803, 804
FRONT
LEVEL
RV154
FRONT
LOW BOOST
(40 Hz)
RV152-2
FRONT
FILTER
FILTER
RV152-1
FRONT
FILTER
FILTER
MUTING
Q151
BIAS
Q106, 107
S151
HP
OFF
LP
+
+
R-CH
R-CH
R-CH
OVER LOAD
DETECT
Q312
PRE AMP
IC802
BOOST
AMP
IC355
BOOST
AMP
IC155
HIGH-PASS
FILTER
IC351
HIGH-PASS
FILTER
IC352
LOW-PASS
FILTER
IC353
LOW-PASS
FILTER
IC354
MUTING
SWITCH
SWITCH
Q301
DIFFERENTIAL
AMP
Q303
DIFFERENTIAL
AMP
Q302
DRIVE
AMP
Q304
DRIVE
AMP
Q305
POWER
AMP
Q308, 310
POWER
AMP
Q309, 311
RV351
REAR
SUBSONIC
FILTER
RV353
OVER LOAD
PROTECT
Q805, 806
Q805, 806
REAR
LEVEL
RV354
REAR
LOW BOOST
(40 Hz)
RV352-2
REAR
FILTER
SENSING POWER ON
HIGH LEVEL INPUT
RV352-1
REAR
FILTER
MUTING
Q351
BIAS
Q306, 307
S351
+
+
R-CH
R-CH
R-CH
D813
D931
(PROTECTOR)
D929, 930
(ILLUMINATION)
PROTECTOR
DRIVER
Q911, 912
FAN MOTOR
DRIVER
Q701 – 705
MUTING
CONTROL
Q605 – 607
LED
DRIVER
Q913, 916
CN906
CNJ101
1
FL+
R-CH
R-CH
R-CH
2
FR+
R-CH
4
RR+
3
RL+
TB002
TB003
TB001
F902
F901
D904
B+ SWITCH
Q907, 908
DC DETECT
Q910
OVER VOLTAGE
DETECT
Q909
TH904 – 906
M901
(FAN)
M
THERMAL
DETECT
Q601
TH601 – 603
D606
Q604
MUTING
CONTROL
Q602, 603
DC/DC
CONVERTER
IC901
BUFFER
Q915
BUFFER
Q914
SWITCHING
DRIVER
Q901, 903, 905
–15V
REGULATOR
Q802
+15V
REGULATOR
Q801
SWITCHING
DRIVER
Q902, 904, 906
RECT
D925 – 928
RECT
D801, 802
RECT
D803, 923
+15V
–15V
+34V
+32V
RECT
D805, 924
–34V
–32V
T002
DC/DC
CONVERTER
TRANSFORMER
FRONT
FILTER
FILTER
SELECTOR
HP
OFF
LP
REAR
FILTER
SELECTOR
–
+
–
–
+
–
–
–
(L+R)
FRONT
SPEAKER
OUT
L
R
(L+R)
FRONT
INPUT
REAR
L
R
(L+R)
L
R
(L+R)
REAR
SPEAKER
OUT
L
R
+12V
30A
30A
REM
: AUDIO
SIGNAL PATH
R-ch is omitted due to same as L-ch.
XM-GS400
XM-GS400
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.)
(In addition to this, the necessary note is printed in each block.)
• Waveforms
– MAIN Board –
+
–
–
DTC
1IN+
ERROR
AMPLIFIER 1
AMPLIFIER 1
PWM
COMPALATOR
COMPALATOR
UNDER
VOLTAGE
LOCKOUT
CONTROL
VOLTAGE
LOCKOUT
CONTROL
C1
1D
CTC
COMPALATOR
COMPALATOR
FEEDBACK
2IN+
2IN–
2IN–
1
3
4
0.7mA
15
16
OSCILLATOR
PULSE-STEERING
FLIP-FLOP
REF
14
1IN– 2
CT
RT
RT
OUTPUT CTRL
5
6
6
13
VCC
12
GND 7
+
–
–
ERROR
AMPLIFIER 2
AMPLIFIER 2
C1 8
E1
9
E2
10
C2
11
REFERENCE
REGURATOR
• IC Block Diagram
– MAIN Board –
IC901 TL594INSR
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF) 50
• All capacitors are in μF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.
• 2 : Nonfl ammable resistor.
• C : Panel designation.
• C : Panel designation.
• A : B+ Line.
• B : B– Line.
• Power voltage is dc 14.4 V and fed with regulated dc
• B : B– Line.
• Power voltage is dc 14.4 V and fed with regulated dc
power supply from +12 V and REM terminals.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : POWER ON
• Voltages are taken with VOM (Input impedance 10 M
• Voltages are taken with VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F :
F :
AUDIO
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• Y : Parts extracted from the conductor side.
•
• X : Parts extracted from the component side.
• Y : Parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers’ patterns are not indicated.)
• Indication of transistor.
C
B
These are omitted.
E
Q
C E
B
These are omitted.
B
These are omitted.
C E
Q
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
39.6
Ps
28.8 Vp-p
2
Q901 – 904 (Drain)
10 V/DIV, 20
Ps/DIV
3
IC901
5 (CT)
1 V/DIV, 10
Ps/DIV
20
Ps
3 Vp-p
1
Q901 – 904 (Gate)
5 V/DIV, 20
Ps/DIV
39.6
Ps
13 Vp-p
4
IC901
9 (E1), q; (E2)
5 V/DIV, 20
Ps/DIV
39.8
Ps
14.6 Vp-p
XM-GS400
XM-GS400
12
12
4-2. PRINTED WIRING BOARD - MAIN Board (Component Side) (Suffi x-11) -
•
: Uses unleaded solder.
R402
R403
R406
R407
R215
R409
R216
R410
R604
R605
R606
R607
R608
R415
R416
R610
R612
R613
R614
R615
R231
R233
R811
R431
C201
C202
R433
C203
C205
C206
C401
C402
C403
C210
C405
C406
C601
C410
TH601
Q101
Q102
Q103
D201
D202
Q301
Q302 Q303
D401
D402
D603
D604
D605
Q701
D606
Q702
Q703
Q704
D803
D805
Q911
Q912
IC801
IC802
R102
R103
R106
R107
R109
R302
R303
R306
R307
R115
R309
R116
R310
R315
R316
R700
R701
R702 R703
R704
R705
R706
R707
R131
R901
R133
R903
R908
R331
C101
C102
R333
C103
C105
C106
C301
C302 C303
C110
C305
C306
C310
C700
C901
C902
C903
C904
R942
R943
R944
TH904
R945
R947
R953
R954
D101
D102
Q201
Q202
Q203
D301
D302
Q401
Q402 Q403
Q601
Q602
Q603
Q604
Q605
Q606
Q607
D700
D701
D702
IC901
D923
D924
R202
R203
R206
R207
R209
MAIN BOARD
(COMPONENT SIDE)
A
K
A
E
2B
1B
2C
1C
E
2B
1B
2C
1C
E
2B
1B
2C
1C
2C
E
2B
1B
1C
K
A
K
E
E
E
E
A
A
K
A
K
A
K
K
A
K
1
4
8
5
1
4
8
5
E
E
E
E
E
E
E
E
E
E
E
1
8
16
9
E
E
K
K
K
K
K
A
A
A
A
K
K
A
A
K
1-885-852-
11
(11)
E
1C
2C
1B
2B
E
1C
2C
1B
2B
E
1C
2C
1B
2B
E
1C
2C
1B
2B
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
9
10
11
12
A
K K
A
K K
K
A A
K
A A
Note: Refer to the servicing notes “MAIN AND CONTROL BOARDS
DISCRIMINATION” (page 3) for how to distinguish Suffi x-11
and Suffi x-12 of MAIN board.
and Suffi x-12 of MAIN board.
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