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THIS NOTE IS COMMON FOR PRINTED WIRING 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.
• Y : Parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
C
Q
These are omitted.
B
E
B
C E
These are omitted.
Q
B
C E
These are omitted.
• Abbreviation
IND
: Indian model
XM-N502
SECTION 4
DIAGRAMS
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.
• 2 : Nonfl ammable resistor.
• C : Panel designation.
• A : B+ Line.
• 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).
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
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: AUDIO
• Abbreviation
IND
: Indian model
• Waveforms
– MAIN Board –
IC901 5 (CT)
1
3 Vp-p
20 s
2 V/DIV, 10 s/DIV
2
Q910, 911 (Drain)
29.6 Vp-p
39.6 s
20 V/DIV, 20 s/DIV
• IC Block Diagram
– MAIN Board –
IC901 TL594CD-R2
ERROR
AMPLIFIER 1
1IN+
1
+
–
1IN– 2
0.7mA
3
FEEDBACK
PWM
PULSE-STEERING
COMPALATOR
FLIP-FLOP
C1
4
DTC
CTC
COMPALATOR
CT
5
OSCILLATOR
RT
6
GND
7
C1
8
7
7
ERROR
AMPLIFIER 2
16
2IN+
+
–
15
2IN–
REFERENCE
14
REF
REGURATOR
UNDER
VOLTAGE
LOCKOUT
CONTROL
1D
13
OUTPUT CTRL
12
VCC
11
C2
E2
10
9
E1
XM-N502
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