Read Sony XM-N502 Service Manual online
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
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