Schematic Diagram - Yamaha CDC-775 Service Manual

A B C

SCHEMATIC DIAGRAM

1
2
4.3
3.6
1.8
3
MOTOR DRIVE
2.4
4
5
MOTOR DRIVE
6
7.1 12.8
7.5
0
12.9
406 10
6 407
1 8 0
9 0 82K
0 7
409 100K 0 408 120K
402
410
0 411 110K
1 0 3
412
7 0 4
2 0
5 110K
1
413 -8.9
8
9
10
D E F
CD HEAD AMP
2.5
2.4
1.3
2.5
1.9
SPC
4.9
0
ACT.
0
0
2.5
4.9
2.4
0
0
4.9 5.0
2.4 2.5
2.1 2.1
2.2 2.1
q
0 0
0 0
0 0
0 0
2.2 2.2
2.5
2.1 2.1
2.4
2.4
0
2.4 2.4
5.0 5.0
4.9
4.9
0
SYSTEM
CONTROL
4.9
4.9
4.9
4.9
4.9
0
4.9
4.9
4.9
4.9
4.9
-15.9
-8.9
12.8
0
13.3
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
G H
4.9
1.6
0
0
DAC 1.6
4.9
2.4
2.4
~
4.9
1.6
0
4.9 1.6
0
4.9
~
0
~
4.8
0
0
0
0
4.9
e
0.1
4.7
2.4
0
4.9
~
2.4
2.4
EEP
ROM
4.9 4.9
4.8 4.9
0 4.7
0 0.1
5.0
4.9
4.8
4.9
0
4.9
4.9
0
4.6
4.9
0
4.9
2.2
2.6
0
0
0
0
4.9
4.8
4.8
0
4.9 w
r
POWER
SUPPLY
4.9
4.8
-~
-28.1
-22.5
-25.6
-25.6
FL
-25.6
-25.6
-25.6
DRIVE
-25.6
-25.6
-25.6
-25.6
~
~
~
I J K
TWIN BALANCED
LPF
PROCESSING AMP
5.6
1.6 5
8 MUTING
7
1.6
1.6 1.0
6 6 5.6
7 0 3 8
1
4.9 1.6
5 4 0 2
0 0 0
2 1.0 -5.6
-5.6 -5.6
1.6 1
1.6 0 0
3
4
1.6 -5.6
5.6
1.6
5 8
0 0
7 -5.6
4.9
1.6 1.6 -5.6
6 0 6
1.0 0 0
3 4 7
1 0 5 0
1.0 0 8
2 2 5.6
1.6 1
1.6
3 4
-5.6
1.6
PHONES AMP
12.8
12.1
13.4
11.6
0 8
3 1
0 0
2
0
6 7
0 0
4
5
-14.2
13.9
9.0
9.6 -16.0
-15.3 -14.6
MUTE
0
0
CONTROL
4.9
2.5
13.8
4.9 5.0 5.1
5.1
4.9
5.0
-5.6
4.8 5.0
-5.6 -16.0 -16.0
4.9
4.9
13.4
5.6
13.6
13.4
5.0
5.6
0
-27.7
-28.1 -34.2
-37.7
-28.5
-16.0
L M N
CDC-775
Point q (Pin 59 of IC3)
V : 2V/div, H : 50nsec/div
DC, 1 : 1 probe
0V
Point w (Pin 10 of IC301)
V : 2V/div, H : 0.1µsec/div
DC, 1 : 1 probe
0V
Point e (Pin 17 of IC100)
V : 2V/div, H : 50nsec/div
DC, 1 : 1 probe
0V
Point r
CH 1 : Pin 8 of IC200
CH 2 : Pin 12 of IC200
V : 2V/div (CH 1/CH 2)
DC, 1 : 1 probe, H : 0.5sec/div
CH 1
CH 2
AC CORD AC CORD
ON OFF
* All voltage are measured with a 10M Ω /V DC electric volt meter.
* Components having special characteristics are marked Z and
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
32