A
1
2
3
4
5
6
7
8
9
B
C
D
E
F
G
H
I
J
K
L
CDC-E500
SCHEMATIC DIAGRAM
39
★
All voltage are measured with a 10M
Ω
/V DC electric volt meter.
★
Components having special characteristics are marked
s
and must be
replaced with parts having specifications equal to those originally
installed.
★
Schematic diagram is subject to change without notice.
x: NOT USED
O: USED / APPLICABLE
Point
3
Pin 7 of IC6
and Pin 6 of IC6
POWER ON
(Connect the power cord)
POWER OFF
(Disconnect the power cord)
Pin 7 of
IC6
Pin 6 of
IC6
Point
2
Pin 59 of IC202
Point
1
Pin 13 of IC201
6
5
5
6
2
3
3
2
PICK UP
CD MECHA. UNIT
LD DRIVE
ACT. MOTOR DRIVE
HEAD AMP.
KEY MATRIX
DISPLAY
LPF
EEP ROM
MUTE CONTROL
MUTING
POWER SUPPLY
RESET
0
0
-9.9
0
0
-9.9
0
0
0
0
-9.9
-9.9
0
5.0
2.6
5.0
10.5
5.1
5.1
5.1
5.8
10.5
0
-9.9
-9.9
-0.2
8.3
-0.2
8.3
5.1
5.1 5.1 1.2
8.3
0.2
0
-27.4
-26.7
-21.1
-31.0
-31.0
-26.7
0
-0.2
-0.2
5.1
6.3
0
6.3
5.0
10.5
-9.9
0
5.1
5.1
5.1
5.1
5.1
3
B
A
AC 9.3
AC 15.2
AC 22.4
AC 24.7
1.9
4.5
3.9
0.2
3.9
5.0
2.5
2.2
2.5
4.5
2.6
0
2.5
3.8
0
3.8
0
00
0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.6
2.6
2.6
2.6
4.2
2.6
2.5
2.6
5.8
0
5.0
0
5.8
2.4
3.0
2.7
2.7
2.6
2.0
0
0
5.8
5.8
2.6
2.7
2.7
0
2.6
2.5
5.0
5.0
0.6
0
10.5
0.6
5.7
0
5.7
5.0
5.0
5.0
0.6
0
10.5
0.6
6.3
0
6.3
5.0
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
-26.1
~
~
-20.9
-20.9
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
-26.1
~
~
~
~
~
~
~
~
-20.9
-20.9
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
-26.0
~
~
~
~
~
~
~
~
~
~
~
~
~
-26.0
~
~
~
3.8
5.0
0.1
5.0
5.1
2.5
2.5
0
0
-26.7
~
~
~
~
~
2.5
2.5
2.5
2.4
0
5.0
5.0
2.5
2.5
0
0
0
5.0
5.0
5.0
0
5.0
5.0
5.0
5.0
2.5
5.0
0
0
0
0
0
0
5.0
2.1
2.6
2.6
1.4
2.6
5.0
5.0
5.0
5.0
5.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
0
2.5
2.5
2.5
2.5
2.5
0
0
0
0
0
0
0
0
0
0
0
0
0
8.0
-9.5
-9.5
8.0
5.0
0.1
0
0
5.0
5.0
5.0
0
0
0.1
3.9
0
5.0
0
0
0
5.0
5.0
5.0
~
~
~
~
~
~
~
5.1
~
0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
0
5.0
3.9
0
0
5.0
0
0
0
5.0
5.0
0
5.0
2.5
0
2.5
0
0
5.0
5.0
2.5
5.0
5.0
5.0
5.0
5.1
0
5.0
5.0
5.0
~
~
~
5.0
5.0
5.0
0
5.0
0
5.0
5.0
0
0
5.0