Sony XM-N502 Service Manual ▷ View online
XM-N502
5
3-3. MAIN BOARD BLOCK
3-4. MAIN BOARD
– Bottom view –
boss
boss
1 three screws
(+P, TT, B-TYPE, 3
u L)
1 three screws
(+P, TT, B-TYPE, 3
u L)
1 three screws
(+P, TT, B-TYPE, 3
u L)
2 screw
(+B, TT, B-TYPE, 3
u L)
Note 1: Please spread a sheet under a unit
not to injure heat sink (main).
3 MAIN board block
Note
2: When installing the MAIN board block,
align two holes and two bosses.
hole
hole
4 MAIN board
RV301
RV301
RV301
3 sheet heat transfer S
sheet heat transfer S
6KHHWKHDWWUDQVIHUVHWWLQJ
NG
OK
2 front panel
front panel
front panel
MAIN board
1 screw
(+P, TT, B-TYPE, 3
u L)
1 screw
(+P, TT, B-TYPE, 3
u L)
1 screw
(+P, TT, B-TYPE, 3
u L)
1 screw
(+P, TT, B-TYPE, 3
u L)
Note: When installing the front panel,
check that RV301 must be stay
in the center of the hole.
XM-N502
6
MEMO
XM-N502
XM-N502
7
7
SECTION 4
DIAGRAMS
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 TL594CD-R2
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
• Abbreviation
IND
IND
: Indian model
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.
• Indication of transistor.
C
B
These are omitted.
E
Q
C E
B
These are omitted.
B
These are omitted.
C E
Q
• Abbreviation
IND
IND
: Indian model
1
IC901
5 (CT)
2 V/DIV, 10
Ps/DIV
20
Ps
3 Vp-p
2
Q910, 911 (Drain)
20 V/DIV, 20
Ps/DIV
39.6
Ps
29.6 Vp-p
XM-N502
XM-N502
8
8
4-1. SCHEMATIC DIAGRAM - MAIN Board (1/2) -
1
(1/2)
MAIN
BOARD
0.1
0.1
0.1
13.1
-0.6
0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
13
0.1
-14.1
13.1
13.1
-14.3
-14.3
13
-14.1
0.1
0.1
0.1
1.8
13.1
1.5
-13.9
13
13.1
13
11.3
13.1
13
0.1
0.2
0.8
0.2
0.2
5.3
5.3
0.1
47p
C103
2.2k
R302
4.7k
R111
10k
R106
0.22
C301
NJM4565M(TE2)
IC303
3
2
1
47p
C205
NJM4565M(TE2)
IC303
5
6
7
22k
R102
1k
R301
10k
R206
NJM4565M(TE2)
IC301
3
2
1
NJM4565M(TE2)
IC303
8
POWER
4
GND
22k
R202
4.7k
R211
22k
R203
NJM4565M(TE2)
IC301
5
6
7
16V
220
C302
NJM4565M(TE2)
IC301
8
POWER
4
GND
47p
C303
10k
R107
22k
R103
10k
R205
CNJ901
2P
TP25
TP28
TP23
TP24
100p
C104
100p
C105
100p
C304
50V
C109
22
R108
22k
R207
22k
50V
C209
22
100p
C210
100p
C110
0.1
C204
10k
R518
TP6
1M
R513
TH503
100k
R516
2SC3052EF-T1-LEF
Q512
RT1N441C-TP-1
Q501
3.3k
R508
MC2836-T112-1
D512
TP5
MC2838-T1
12-1
D501
DA2J10100L
D514
RT1P141C-TP-1
Q503
3.3k
R502
2.2k
R501
82k
R517
50V
22
C504
TH502
RT1P441C-TP-1
Q510
2.2k
R507
TP3
DA2J10100L
D515
10k
R506
DZ2J068M0L
D513
0.1
C502
TH501
100k
R509
0.1
C505
100k
R510
10k
R505
470
R246
2.2k
R503
2SC3052EF-T1-LEF
Q511
2SC3052EF-T1-LEF
Q502
10k
R236
2SC3052EF-T1-LEF
Q304
4.7k
R241
10k
R215
0.47
C216
50V
22
C208
4.7k
R214
4.7k
R213
0.47
C218
0.1
C217
50V
22
C220
10k
R208
10k
R212
330
R242
10k
R243
10k
R112
330
R142
MC2838-T1
12-1
D503
TP2
C508
100p
R515
220k
1
2
3
4
4P
CN901
L+
R+
L–
R–
R528
1k
C509
100p
R514
220k
R524
220k
R525
1k
C507
100p
C510
100p
R523
220k
TP1
C514
0.1
C515
0.1
C523
0.1
C524
0.1
R521
2.2k
R522
2.2k
10k
RV301
100k
R512
R247
22k
0.1
C219
680
R245
390
R145
330
R146
DZ2J056M0L
D919
2SC3052EF-T1-LEF
Q508
TP4
10k
R143
TH504
2.2k
R504
TP13
MC2838-T1
12-1
D502
RTAN140C-T112-1
Q101
RTAN140C-T112-1
Q100
RTAN140C-T112-1
Q201
RTAN140C-T112-1
Q200
S301
PRE AMP
IC301
(3/3)
PRE AMP
IC301
(1/3)
(3/3)
PRE AMP
IC303
(1/3)
PRE AMP
IC303
(2/3)
(2/3)
1
2
3
5
4
6
7
MAIN BOARD (1/2)
-2
-1
MUTING
SWITCH
SWITCH
MUTING
Q502, 503
PROTECT SWITCH
Q510, 511
MUTING SWITCH
THERMAL DETECT
THERMAL DETECT
DC OFF DETECT
LOW-PASS FILTER
LPF
(80Hz)
ON
OFF
-1
-2
LEVEL
HIGH LEVEL INPUT
SENSING POWER ON
(E, IND)
L
(BTL)
R
INPUT
15
6
12
J
3
G
13
4
F
5
2
7
C
H
I
11
14
E
9
B
8
A
10
D
1
+
–
–
+
–
+
+
–
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