Yamaha CDX-E400, Service Manual

Page: 22 / 35

A B C D E F G H
1
2
3
4
5
6
CDX-E400
22
■
PRINTED CIRCUIT BOARD (Foil side)
VCC
/RESET
Point
w
(Pin 10 of IC103)
V : 2V/div, H : 0.2
µ
sec/div
DC, 1 : 1 probe
Point
q
(Pin 59 of IC102)
V : 2V/div, H : 50nsec/div
DC, 1 : 1 probe
0V
0V
Point
r
-A (/RESET : Pin 8 of IC4)
Point
r
-B (VCC : Pin 16 of IC4)
V : 2V/div (/RESET), V : 5V/div (VCC)
DC, 1 : 1 probe, H : 5 sec/div
AC CORD : OFF AC CORD : ON
Ref. No. Location
D1 D2
D2 D2
D3 D3
D4 D3
D5 D3
D6 C2
D10 D3
D11 C3
D12 C3
D13 C3
D14 C2
D101 F4
D102 F4
D103 F4
D104 F4
D105 F3
D106 F3
Ref. No. Location
IC3 C4
IC4 C3
IC101 E2
IC102 D3
IC103 F4
IC104 E3
IC105 C3
IC302 F3
IC303 F2
● Semiconductor Location
Ref. No. Location
Q1 F2
Q2 F2
Q3 B4
Q4 B4
Q5 B3
Q6 B3
Q7 D3
Q8 C3
Q9 D3
Q10 C3
Q102 E3
Point
t
(EFN)
V : 0.2V/div, H : 0.5
µ
sec/div
AC, 1 : 1 probe
1
10
MAIN ( 1 ) P. C. B.
KD0
K2
K0
VP
DI
CE
FL2
KD1
K1
+5
GND
CL
/BLK
FL1
T
O
:
CD MECHANISM UNIT
T
O
:
CD MECHANISM UNIT
LO
AD+ LO
AD
–
OPSW DGND CLSW
SPDL+ SPDL
–
FEED+ FEED
–
FLSW DGND
FA–
TA+
PD
LD
F
B
D
+5V
TA–
FA+
GND
GND
C
A
E
VREF
FROM : CD MECHANISM UNIT
1
16
32
1
14
5
8
1
4
5
8
8
20
1
100
81
80 51
50
31
30
5
8
1
4
21 40
41
60
61 80
1
9
16
17
AC GND AC FL1 FL2
FROM : MAIN (3)
4
B
4 A
SYSTEM
CONNECT
OR
DIGIT
AL
OUT
(OPTICAL)
ANALOG
OUT
1 2
FROM : MAIN (2)
12
1
22
42
W3 W2
5
Test disc
SONY YEDS-18 (P/No. TX911730)
A-BEX TCD-782 (P/N. TX913350)
or Philips 5 : x1