Printed Circuit Board - Yamaha DVD-C900 Service Manual

A B
DVD-C900
Q Q
3 7 6 3 1 5 1 5 0
PRINTED CIRCUIT BOARD (Foil side)
1
P.C.B. MAIN
FROM : CM (4)
5
4
2
3
e
T E
L 1 3 9 4 2 2 9 6 5 1 3
1
100
76
75
4
5
JIT OUT
w w w
Red shade : Component side pattern (Table)
Blue shade : 2-layer pattern (For ground)
Green shade : 3-layer pattern (For power supply)
Black shade : Solder side pattern (Backside)
Note) The 2-layer and the 3-layer pattern are displayed in reverse. The colored part represents the free
section and the uncolored part represents the section with the normal pattern.
E-56/J-52
6
C
(Lead Type Device)
11 20
8
10 1
1
26 50
25 1
11 20
10 1
1 52
208
53
157
104
156 105
25
26
50
51
8 5
J, R, T only
1
4
89 132
88
133
45 176
44 1
FROM : OPERATION (1)
FROM : OPERATION (6) /U only
x a o
. i
D http://www.xiaoyu163.com E
P.C.B. MAIN
44
1
44
1
Q Q
3 7
28 15
14
1
u 1 6 3
y
http://www.xiaoyu163.com
F
2 4
8 9 9
(Surface Mount Device)
23
22
25 1
26 50
23
22
6 3 1 5 1 5 0 8 9
J, R, T only
15 15
28 28
1 14 1 14
15 15
28 28
1 14 1 16 9
14
1 8
U only
r
44 23
t
1 22
q w
m
c o
.
G H
2
8 9 9
Point q (Pin7 of IC29)
V : 2V/div H : 50 nsec/div
DC range 1 : 1 probe
0V
Point w (Pin7 of IC30)
V : 2V/div H : 50 nsec/div
DC range 1 : 1 probe
0V
Point e (Pin72 of IC44)
H : 0.1 µsec/div
V : 2V/div
DC range 1 : 1 probe
2 4 9 8 2 9 9
0V
Point r (Pin7 of IC322)
V : 2V/div H : 50 nsec/div
DC range 1 : 1 probe
0V
Point t (Pin7 of IC323)
V : 2V/div H : 50 nsec/div
DC range 1 : 1 probe
0V