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Q Q
3 7 6 3 1 5 1 5 0
3-1. NOTE FOR PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
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
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1
/
W or less unless otherwise
4
specified.
•
%
: indicates tolerance.
• 2 : nonflammable resistor.
Note:
Note:
Les composants identifiés par
The components identi-
fied by mark 0 or dotted
une marque 0 sont critiques
line with mark 0 are criti-
pour la sécurité.
cal for safety.
Ne les remplacer que par une
Replace only with part
piéce por tant le numéro
number specified.
spécifié.
• 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 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
T E
L
1 3 9 4 2 2 9 6 5 1 3
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: AUDIO
for printed wiring boards:
Note:
• X : parts extracted from the component side.
•
: Pattern from the side which enables seeing.
(The other layer's patterns are not indicated.)
Caution:
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.
w w w
.
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SECTION 3
DIAGRAMS
3-2. IC BLOCK DIAGRAM
IC6 TL494CN
16
15
14
13
12
11
10
9
ERROR
REF.REG.
ERROR
0.1V
OSC
1
2
3
4
5
6
7
8
x
a o
u 1 6 3
y
i
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8
9
Q
Q
3
7
6
3
1
5
1
c o
.
9
9
2
4
2
9
8
• Semiconductor Location
(Main Section)
Ref. No.
Location
Ref. No.
(D2)
D-7
Q7
D3
E-7
Q8
(D8)
E-6
Q9
D9
E-5
Q10
D11
G-4
Q11
(D13)
D-8
(Q12)
(D14)
D-8
Q13
(D15)
F-8
Q14
(D16)
F-8
Q16
D17
E-8
Q17
(D19)
C-2
(Q18)
(D20)
B-2
(Q19)
D26
E-7
(Q20)
(Q21)
(FET1)
B-12
(Q22)
(FET2)
C-12
(Q23)
(FET3)
C-12
(Q24)
(FET4)
D-12
(Q25)
(FET5)
D-12
(Q26)
(FET6)
E-12
(Q27)
(FET9)
C-2
(Q28)
(FET10)
D-2
(Q29)
(FET11)
E-2
(Q30)
(FET12)
E-2
(Q31)
(Q33)
IC2
G-6
Q34
IC3
G-5
Q35
IC4
G-4
Q36
IC5
F-4
(Q37)
(IC6)
E-9
(Q38)
IC7
F-9
Q39
IC8
C-7
Q40
Q41
5
0
8
9
(LED2)
2
4
F-14
9
8
Q42
2
(LED3)
F-14
Q43
Q44
(PTC1)
E-8
Q45
(PTC2)
D-8
Q46
(Q1)
F-6
(ZD1)
(Q2)
G-6
(ZD2)
(Q3)
F-5
(ZD3)
(Q4)
G-5
(ZD4)
Q5
F-8
(ZD5)
Q6
F-8
(
): SIDE B
m
XM-D500X
9
9
Location
F-9
F-9
F-9
F-6
E-8
G-10
G-10
F-9
F-9
C-8
D-5
E-6
D-6
D-6
D-5
C-5
C-5
B-5
B-5
C-6
C-6
B-6
B-6
D-6
E-7
D-8
C-7
C-7
F-10
E-10
E-8
E-8
G-9
9
E-7
9
E-7
E-8
G-9
G-4
F-7
G-7
F-5
G-5
C-7
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