Sony XM-1502SX / XM-1902GX Service Manual ▷ View online
9
9
4-1. BLOCK DIAGRAM
SECTION 4
DIAGRAMS
3
2
1
6
5
7
5
7
2
1
6
7
PRE AMP
IC101(1/2)
PRE AMP
IC101(2/2)
5
6
7
3
2
1
LOW BOOST
IC104(2/2)
LINE AMP
IC104(1/2)
H.L.F
IC102(2/2)
L.P.F
IC102(1/2)
L.P.F
IC103(2/2)
DIFFERENTIAL
AMP
Q103
POWER
AMP
Q108,110,112
OVER CURRENT
DET
Q114-116
DRIVE
AMP
Q105
DIFFERENTIAL
AMP
Q104
POWER
AMP
Q109,111,113
DRIVE
AMP
Q106
BIAS
Q107
LEVEL
SHIFT
Q101
LEVEL
FILTER
S801-1
LPF
OFF
HPF
LEVEL
RV103-1
LOW
BOOST
+14.2V
(B+)
-14.2V
(B–)
CNJ801-1
INPUT
RV101-1
FILTER
XM-1902GX
RV801-1
FILTER
RV801-2
FILTER
OUTPUT
(THROUGH)
OUTPUT
(THROUGH)
L
SPEAKER
OUT
L
SPEAKER
OUT
R
RV104-1
LINE
SWITCH
Q102
REM
12V
GND
2
3
10
4
1
6
5
7
5
7
2
1
2
1
PRE AMP
IC201(1/2)
PRE AMP
IC201(2/2)
5
6
7
3
2
1
LOW BOOST
IC204(1/2)
LINE AMP
IC204(2/2)
H.P.F
IC202(2/2)
L.P.F
IC202(1/2)
L.P.F
IC103(1/2)
DIFFERENTIAL
AMP
Q203
POWER
AMP
Q208,210,212
OVER CURRENT
DET
Q214-216
DRIVE
AMP
Q205
DIFFERENTIAL
AMP
Q204
POWER
ON/OFF
Q903
LINE SWITCH
CONTROL
Q801,802
POWER
AMP
Q209,211,213
DRIVE
AMP
Q206
BIAS
Q207
LEVEL
SHIFT
Q201
RV103-2
LOW
BOOST
+14.2V
(B+)
-14.2V
(B–)
CNJ801-2
CNJ803
INPUT
RV101-2
FILTER
RV801-3
FILTER
RV801-4
FILTER
R
L
HI LEVEL
INPUT
R
RV104-2
LINE
SWITCH
Q202
RV205
BIAS
RV105
BIAS
DC OFFSET
DET
Q803-805
15
16
1
2
14
12
B+
SWITCH
Q901,902
TEMP. DET
TH801-803,
806-809,
812,813
DC DET
IC901
REF.
REG
REG
LED DRIVE
Q813
LED DRIVE
Q809
PROTECT LATCH
Q812
LED DRIVE
Q811
CN802
CN801
F901
DECT
D909
D909
DECT
D905
D905
DECT
D907
D907
DECT
D906
D906
DECT
D911,917
DECT
D908
D908
DECT
D910
D910
+53V
(B+)
+51V
(B+)
+53V
(B+)
-51V
(B–)
-51V
(B–)
-53V
(B–)
-14.2V
(B–)
-20.3V
(B–)
+14.2V
(B+)
+20.3V
(B+)
INVERTER
Q904,905
INVERTER
Q906,907
HI-CURRENT
/HI-VOLTAGE
DET
IC903,Q912
B+
REG
Q910
B+
REG
Q911
DRIVER
Q908
DRIVER
Q909
11
9
8
3
+14.2V
(B+)
+14.2V
(B+)
D811
THERMAL
D810
OFFSET
D809
OVER
CURRENT
D808
POWER
+20.3V
(B+)
-20.3V
(B–)
D922
D919
D920
D921
DECT
D912,918
DC-DC
CONVERTER
TRANSFORMER
T901
+14.2B
(B+)
-14.2B
(B–)
S301
TEST TONE
TEST TONE
GENERATOR
IC301(2/2)
TEST TONE
GENERATOR
IC301(1/2)
D301
D302
DC-DC CONVERTER
IC901
Q808
D808
D807
• Signal path
: AUDIO
: AUDIO
CN804
CN805
1
2
1
2
04
1
2
1
PROTECT LATCH
Q810
XM-1902GX
FILTER
S801-2
LPF
OFF
HPF
(Q110,111,115:XM-1902GX)
(Q210,211,215:XM-1902GX)
Ver 1.2
XM-1502SX/1902GX
10
10
• IC Block Diagram
IC901 µPC494GS-T1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
OSC
REF. REG.
ERROR
ERROR
0.1V
• Waveform
IC901
5
1
1V/DIV, 5µsec/DIV
15µsec
3.4Vp-p
Ver 1.2
Q101
F-4
Q102
E-7
Q103
F-9
Q104
F-9
Q105
E-10
Q106
E-10
Q107
G-11
Q108
C-11
Q109
D-11
(Q110)
E-11
(Q111)
F-11
Q112
F-11
Q113
G-11
Q114
C-12
(Q115)
D-12
Q116
F-12
Q201
G-4
Q202
E-5
Q203
E-3
Q204
E-4
Q205
E-3
Q206
E-3
Q207
G-1
Q208
C-1
Q209
D-1
(Q210)
E-1
(Q211)
E-1
Q212
F-1
Q213
G-1
Q214
D-1
(Q215)
D-1
Q216
F-1
Q801
D-7
Q802
D-7
Q803
B-1
Q804
B-1
Q805
B-1
Q809
A-11
Q810
A-12
Q811
A-11
Q812
B-11
Q813
B-11
Q901
F-10
Q902
F-10
Q903
G-10
Q904
A-8
Q905
A-7
Q906
A-5
Q907
A-6
Q908
A-7
Q909
A-6
Q910
B-2
Q911
B-2
Q912
B-3
D101
E-9
D102
E-9
D103
E-9
D104
E-9
D201
E-4
D202
E-3
D203
E-4
D204
E-4
D301
F-8
D302
G-7
D801
D-7
D802
D-7
D803
B-11
D805
A-11
D807
B-11
D820
C-12
D821
D-12
D824
F-12
D825
G-12
D826
C-1
D827
D-1
D830
F-1
D831
G-1
D901
G-10
D902
G-10
D905
A-4
D906
A-4
D907
A-9
D908
A-8
D909
D-5
D910
D-5
D911
D-6
D912
D-5
D913
B-2
D914
B-2
D915
B-3
D917
D-6
D918
D-5
D919
D-10
D920
D-10
D921
E-3
D922
E-3
IC101
F-6
IC102
F-5
IC103
F-5
IC104
F-3
IC201
F-6
IC202
G-5
IC204
G-3
IC301
F-8
IC901
B-10
IC902
F-9
IC903
A-10
• Semiconductor Location (MAIN SECTION)
Ref. No.
Location
Ref. No.
Location
( ) : XM-1902GX only
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagram:
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
Note:
• 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.
•
%
: 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 REM 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.
• 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.
F
: AUDIO
• Abbreviation
CND : Canadian model
for printed wiring boards:
Note:
Note:
• X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
• Abbreviation
CND : Canadian model
11
11
XM-1502SX/1902GX
4-2. PRINTED WIRING BOARDS — MAIN SECTION — • Refer to page 10 for Semiconductor Location.
US,CND
MODEL
MODEL
US,CND
MODEL
MODEL
AEP,UK,E
MODEL
MODEL
Ver 1.2
12
12
XM-1502SX/1902GX
4-3. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) — • Refer to page 10 for IC Block Diagram. • Refer to page 10 for Waveform.
BA4558F
BA4558F
Ver 1.2
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