Printed Circuit Board - Yamaha CDC-775 Service Manual

A B
CDC-775
PRINTED CIRCUIT BOARD (Foil side)
1
Point q (Pin 59 of IC3)
V : 2V/div, H : 50nsec/div
DC, 1 : 1 probe
0V
2
Point w (Pin 10 of IC301)
V : 2V/div, H : 0.1µsec/div
DC, 1 : 1 probe
0V
3
Point e (Pin 17 of IC100)
V : 2V/div, H : 50nsec/div
DC, 1 : 1 probe
0V
DIGITAL
(OPTICAL)
4
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
5
AC CORD
AC CORD
ON OFF
26
6
C
FROM : PICK UP HEAD
FROM : MAIN (8)
(U, C, A only)
FROM : MAIN (2)
r
AUDIO
OUT
BL
LINE OUT
D E
P. C. B. MAIN ( 1 )
FROM : MOTOR UNIT (Spindle & Feed)
36 19
1 18
36 19
1 18
4 1 4
1
19
8 5
8 BE 5
20
RE
32
1 4
33
1 4
8 5
8 5
q
e
27
F G
GND
+B
-B
GND
+5
TB-L
TB-R
CL-DO
CL-UP
CL
OP
OPSW
CLSW
DOSW
UPSW
TBL-POS
1
64
5
8
52
51
4 1
H
FROM : CM (4)
w
FROM : MAIN (7)
FROM : MAIN (6)
FROM : MAIN (5)