Sony XM-SW1 Service Manual ▷ View online
XM-SW1
5
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
Note: Follow the disassembly procedure in the numerical order given.
2-1. BOTTOM PLATE
2-1. BOTTOM
PLATE
(Page
5)
2-2. MAIN BOARD SECTION
(Page
(Page
6)
SET
2-3. MAIN
BOARD
(Page
6)
4 bottom plate
1 two screws
(+B, TT, B-type, 3
uL)
2 two screws
(+B, TT, B-type, 3
uL)
3 screw
(+BVTP
S3
u6)
XM-SW1
6
2-2. MAIN BOARD SECTION
2-3. MAIN BOARD
4 MAIN board section
main heat sink
1 three screws
(+P, TT, B-type, 3
uL)
2 three screws
(+P, TT, B-type, 3
uL)
3 screw
(+B, TT, B-type, 3
uL)
2 two screws
(+P, TT, B-type, 3
uL)
1 screw
(+P, TT, B-type, 3
uL)
4 screw
(+P, TT, B-type, 3
uL)
3 output panel
6 MAIN board
5 input panel
XM-SW1
XM-SW1
7
7
SECTION 3
DIAGRAMS
3-1. BLOCK DIAGRAM
5
PRE AMP
IC301 (1/2)
2
GAIN CONTROL AMP
IC301 (2/2)
DIFFERENTIAL
AMP
Q102
POWER
AMP
Q109
OVERLOAD
DETECT
Q111
DRIVE
AMP
Q103
DRIVE
AMP
Q107
DIFFERENTIAL
AMP
Q101
POWER
AMP
Q110
DRIVE
AMP
Q104
DRIVE
AMP
Q108
CNJ901
INPUT
L
(MONO)
SPEAKER OUT
L+R
MUTE
SWITCH
Q301
REM
+12V
GND
10
DIFFERENTIAL
AMP
Q202
POWER
AMP
Q209
OVERLOAD
DETECT
Q211
DRIVE
AMP
Q203
DRIVE
AMP
Q207
DIFFERENTIAL
AMP
Q201
POWER
ON/OFF
ON/OFF
Q902
MUTE
CONTROL
Q302-305
POWER
AMP
Q210
DRIVE
AMP
Q204
DRIVE
AMP
Q208
OVERLOAD
PROTECT
Q308,309
15
16
16
1
2
2
14
12
B+
SWITCH
Q903
OVER VOLTAGE
DETECT
Q901
REF.
REG
REG
TEMP. DETECT
TH901,902
THERMAL
DETECT
Q905,906
TB901 (1/2)
D902
D903
F901
RECT
D303
RECT
D304
+13V
+25V
SWITCHING
DRIVER
Q912
SWITCHING
DRIVER
Q913
DRIVER
Q911
VOLTAGE
DETECT
Q907,908
DRIVER
Q910
11
9
3
8
D906
POWER/
PROTECTOR
DC-DC
CONVERTER
TRANSFORMER
T901
DC-DC CONVERTER
IC901
D904,
D905 (1/2)
D905 (2/2)
SLJQDO SDWK
: AUDIO
: AUDIO
TB901 (2/2)
-1
-2
LED DRIVER
Q909
RED
(PROTECTOR)
GRN
(POWER)
R
1
DC DETECT
Q904
30A
RV301
LEVEL
LEVEL
+13V REG
Q306
–15V
–25V
–15V REG
Q307
6
3
7
XM-SW1
XM-SW1
8
8
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 Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
•
• X : Parts extracted from the component side.
•
: Pattern from the side which enables seeing.
For Schematic Diagrams.
Note:
• All capacitors are in
• All capacitors are in
F unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in
and 1/4 W or less unless otherwise
specifi ed.
• A : B+ Line.
• B : B– Line.
• H : Adjustment for repair.
• Power voltage is dc 14.4 V and fed with regulated dc
• B : B– Line.
• H : Adjustment for repair.
• Power voltage is dc 14.4 V and fed with regulated dc
power supply from +12 V and REM terminals.
• Voltages are dc with respect to ground under no-signal
conditions.
• 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
Note: The components identifi ed by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specifi ed.
• Note for Replacement of the Transistors
The transistors Q109, 110, 209 and 210 have two different ranks:
P rank and Y rank.
The rank of these transistors need to be selected properly accord-
ing to each channel. When replacing any one of these transistors,
check its rank and replace with the appropriate transistor of the
same rank.
The transistors Q109, 110, 209 and 210 have two different ranks:
P rank and Y rank.
The rank of these transistors need to be selected properly accord-
ing to each channel. When replacing any one of these transistors,
check its rank and replace with the appropriate transistor of the
same rank.
Rank
Q109, 209
Q110, 210
P
2SC5100-P
(Part No. 8-729-024-79)
2SA1908-P
(Part No. 8-872-024-76)
Y
2SC5100-Y
(Part No. 8-729-024-80)
2SA1908-Y
(Part No. 8-872-024-77)
DISCRIMINATION:
A1908: 2SA1908
C5100: 2SC5100
C5100: 2SC5100
P: RANK P
Y: RANK Y
Y: RANK Y
• Waveform
• IC Block Diagram
IC901 TL594INSR
1
IC901
5 (CT)
1 V/DIV, 10
Psec/DIV
3.1 Vp-p
20
Psec
0.1V
Q1
Q2
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7 8
NON
INV
VREF
VCC
C2
E1
E2
OUT
+IN
–IN
COMPEN
CT
RT
C1
GND
TIME
REF 5V
OSC
ERROR
ERROR
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