Sony XM-280GTX Service Manual ▷ View online
9
9
XM-280GTX
2-4. MAIN BOARD
1
P 3x8
2
P 3x8
3
P 3x8
4
panel (front)
5
MAIN board
2-5. LED BOARD
1
P 3x6
2
LED board
heat sink (main)
3-1. IC BLOCK DIAGRAM
IC8 TL494CN
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.
•
A
: B+ Line.
•
B
: 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
for printed wiring boards:
Note:
Note:
• X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
SECTION 3
DIAGRAMS
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)
parts face are indicated.
OSC
REF 5V
ERROR
ERROR
0.1V
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
COMP EN
CT
RT
C1
GND
TIME
• Waveform
IC8
5
1
1V/DIV, 5µsec/DIV
15µsec
3.4Vp-p
10
10
XM-280GTX
3-2. PRINTED WIRING BOARDS — MAIN SECTION (1/2) — • Refer to page 9 for Common Note on Printed Wiring Boards.
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
MAIN BOARD (SIDE A)
LED BOARD
(SIDE A)
(SIDE A)
1-688-243-
R202
R201
R203
C203
C103
R103
R101
R102
C12
C13
C107
RB204
RB205
RB105
RB104
R109
R209
R24
C10
R27
R64
R29
R41
R32
R31
R115
R116
R215
R216
R124
C108
R130
TH2
R140
R138
R137
R139
R240
R237
R238
R239
R128
R126
R122
C17
R63
R52
R53
R131
C110
R119
R219
R221
D202
Q204
R220
R44
TH3
AKA
D8
R40
R38
R46
R36
AKA
R11
R10
R43
R35
R18
R17
R39
R37
R34
R45
C21
R132
R69
R218
R234
R3
R1
R2
R4
R16
R19
R20
R13
R217
Q214
R134
R118
R117
R133
R123
R121
R120
R125
R127
R129
R60
R61
R58
R59
R8
R71
R70
R7
C9
C5
R5
R6
R243
R244
R242
R241
R142
R141
R144
R143
C7
C6
C4
C3
R9
R14
C11
C28
C27
C8
R54
Q15
Q16
Q12
R28
R26
R25
C20
R12
R23
Q5
Q6
R148
R245
R108
RB203
RB202
RB202
RB103
R30
R67
R55
R55
R56
R57
C29
C29
R62
R51
C23
C23
RB102
R208
C207
R213
R214
R113
R114
BCE
Q20
BCE
Q19
BCE
Q8
BCE
AKA
Q103
BCE
Q114
BCE
ECB
Q113
Q213
ECB
Q104
BCE
AKA AKA
D11 D12
Q108
BCE
D102
AKA
Q102
BCE
BCE
Q13
BCE
ECB
Q17
ECB
BCE
Q101
ECB
Q201
ECB
ECB
Q2
Q1
ECB
BCE
D10
ECB
Q9
ECB
D101
AKA
BCE
IC6
1
4
8
5
IC3
1
4
8
5
IC5
1
4
8
5
AKA
D201
R223 R224
R225
R230
R228
R228
R231
R229
R227
R229
R227
C208
R232
R233
Q208
BCE
Q202
BCE
ECB
Q203
R226
R222
C210
R22
C19
C18
R21
R33
AKA
D7
AKA
AKA
AKA
AKA
D4
D3
D5
D6
C202
R204
R104
C102
C201
IC1
C101
1
4
8
5
LED4
R G
LED5
1-688-244-
(11)
11
(11)
11
POWER/
PROTECTOR
D3
E-7
D4
E-7
D5
F-7
D6
F-7
D7
F-8
D8
B-6
D10
A-3
D11
E-12
D12
E-12
D101
E-12
• Semiconductor Location (Side A)
Ref. No.
Location
Ref. No.
Location
D102
D-12
D201
C-8
D202
C-10
IC1
G-9
IC3
G-6
IC5
G-8
IC6
G-7
LED4
H-1
LED5
H-1
Q1
B-4
Q2
A-4
Q5
H-5
Q6
G-5
Q8
F-8
Q9
G-7
Q12
G-12
Q13
F-12
Q15
F-12
Q16
F-12
Q17
F-11
Q19
H-3
Q20
G-3
Q101
G-7
Q102
E-11
Q103
E-11
Q104
D-11
Q108
D-12
Q113
C-12
Q114
C-11
Q201
G-7
Q202
C-9
Q203
C-9
Q204
C-10
Q208
C-9
Q213
B-12
Q214
C-10
Ref. No.
Location
Ref. No.
Location
Ref. No.
Location
11
11
XM-280GTX
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
MAIN BOARD (SIDE B)
D1
EC13
IC8
MC5
EC12
9
8
16
1
ZD4
ZD3
EC105
REM
HIGH LEVEL INPUT
INPUT
LEVEL
FILTER
OUTPUT
(THROUGH)
30A
FUSE1
EC205
L2
MC102
L5
FET1
FET2
FET3
FET4
R72
TH1
T3
MC1
1
3
1
3
CON1
C209
Q211
Q210
Q206
Q212
Q209
Q205
Q207
MC201
R235
R236
ZD5
ZD2
MC4
MC3
Q4
Q106
IC7
EC5
EC6
EC10
L1
EC9
C109
EC203
EC103
CB201
CB202
CB203
ZD1
Q3
EC26
EC16
C2
C1
EC11
EC7
EC22
EC8
EC21
EC107
EC207
EC202
EC201
EC101
EC102
C25
MC203
MC103
CB101
CB102
CB103
MC202
MC2
EC4
EC3
+12V
GND
D2
TER1
VR1
VR3
LPF OFF
LOW
BOOST
(40Hz)
VR2
SW1
Q7
Q109
Q105
Q110
R136
R135
R
Q112
Q111
Q107
MC101
C16
MC104
MC204
SPEAKER OUT
JK1
TER2
L
(BTL)
T1
-2
-4
-1
-3
-4
-2
-3
-1
R
L
-3
L
-1
L (BTL)
-4
R
-2
R
1-688-243-
G
D
S
G
D
S
G
D
S
G
D
S
LED BOARD
(SIDE B)
(SIDE B)
1-688-244-
(11)
11
(11)
11
CON3
YEL
BLK
ORG
YEL
BLK
ORG
E
E
C
B
E
C
B
B
C
E
B
C
E
B
C
E
E
C
B
B
C
E
B
C
E
B
C
E
B
C
E
B
C
E
B
C
E
B
B
C
E
C
E
B
C
E
C
B
E
C
B
2
1
3
4
-4
-3
-2
-1
-2
-1
-1
-2
-2
-1
3-3. PRINTED WIRING BOARDS — MAIN SECTION (2/2) — • Refer to page 9 for Common Note on Printed Wiring Boards.
D1
B-3
D2
C-3
FET1
D-3
FET2
E-3
• Semiconductor Location (Side B)
Ref. No.
Location
Ref. No.
Location
FET3
E-3
FET4
F-3
IC7
E-8
IC8
B-5
Q3
E-9
Q4
E-9
Q7
F-6
Q105
E-12
Q106
C-12
Ref. No.
Location
Ref. No.
Location
Ref. No.
Location
Q107
D-13
Q109
E-12
Q110
C-12
Q111
E-13
Q112
C-13
Q205
C-7
Q206
C-9
Q207
B-8
Q209
C-8
Q210
C-9
Q211
B-8
Q212
B-9
ZD1
E-10
ZD2
E-8
ZD3
G-5
ZD4
G-5
ZD5
F-8
Ref. No.
Location
Ref. No.
Location
12
12
XM-280GTX
3-4. SCHEMATIC DIAGRAM • Refer to page 9 for Common Note on Schematic Diagrams, IC Block Diagram and Waveform.
IC B/D
C4
C5
C6
C7
C8
C9
C27
C28
R7
R70
R8
R71
R14
C3
R9
C11
C203
C103
C101
C201
EC101
EC102
EC201
EC202
R101
R102
R201
R202
R103
R203
R108
R109
R208
R209
R148
R245
MC103
MC203
C102
R104
C202
R204
C107
C207
EC103
EC203
R113
R213
CB101
CB102
CB201
CB202
RB102
RB103
RB104
RB202
RB203
RB204
R33
R30
EC11
D7
R31
R32
R216
R215
R115
R116
Q107
Q109
Q110
Q111
Q112
D101
D102
R123
R124
R117
R120
R121
R126
R128
R127
R130
R129
R132
R133
R134
MC101
C108
R125
R144
R143
Q207
Q209
Q210
Q211
Q212
R51
R52
R53
R69
R54
R58
R59
R60
R61
D11
D8
R35
R36
R43
R39
R64
R67
R55
R34
R56
R57
C29
C21
R45
R38
R37
EC13
R29
R25
R26
R28
ZD3
R24
R12
R23
R27
ZD4
R20
R13
R18
R19
R16
R17
R1
R3
R2
R4
FET2
FET1
FET3
FET4
R72
D2
D1
R21
R22
ZD2
ZD1
EC22
EC21
C18
C19
EC7
EC8
Q4
Q3
D3
D4
D5
D6
EC9
EC10
MC1
C10
R223
R224
R225
C208
R217
R227
R228
R229
R220
R221
R226
D202
R230
MC201
R234
R233
R243
R244
R122
R222
R119
R219
R41
T1
JK1
R6
R5
EC105
EC205
RB105
RB205
ZD5
D201
R118
R218
R139
R138
R239
R238
C20
EC26
IC1(1/2)
C13
C12
IC1(2/2)
MC102
MC202
IC3(2/2)
IC5(1/2)
IC5(2/2)
IC6(2/2)
IC6(1/2)
R114
CB103
EC107
Q101
R214
CB203
VR1
VR2
VR3
Q201
EC207
Q9
Q8
Q102
Q103
Q105
C109
Q104
Q106
Q114
C110
R131
Q108
R137
Q113
L2
R141
R142
MC104
TER2
R140
Q205
Q203
Q202
C209
Q204
Q214
Q206
C210
R232
R237
Q213
R240
L1
R241
R242
MC204
Q208
TER1
FUSE1
L5
Q20
Q19
CON3
CON1
LED5
LED4
TH2
TH3
TH1
R44
R40
IC8
MC5
EC12
Q7
Q6
Q5
R11
R10
Q1
Q2
MC2
EC3
EC4
C25
MC4
MC3
EC6
EC5
Q12
C23
Q13
C17
Q16
C1
C2
Q15
Q17
R62
R63
EC16
IC3(1/2)
IC7
R235
R236
R231
R135
R136
D12
T3
(6:14:1)
C16
R46
D10
0.5%
0.5%
0.5%
0.5%
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