Yamaha CDX-E400, Service Manual

Page: 25 / 35

A B C D E F G H
1
2
3
4
5
6
I J K L M N
7
8
9
10
CDX-E400
25
■
SCHEMATIC DIAGRAM
* 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.
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
Point
e
(Pin 58 of IC301)
V : 2V/div, H : 0.2
µ
sec/div
DC, 1 : 1 probe
0V
AC CORD : OFF AC CORD : ON
CD HEAD AMP
SPC & DAC
SYSTEM CONTROL
MOTOR DRIVER
FL DRIVER
ACT. MOTOR DRIVER
POWER SUPPLY
MUTE CONTROL
EEPROM
LD DRIVE
MUTING
5.1
5.1
0
5.1
0
0 0
0 0
–5.0
–5.0
0 0
0 0
–5.1
–5.0
0
0
5.1
0
5.1
5.0
5.1 1.3 –5.0
0
–12.6 –5.0 –12.6
0
1.2 5.1
5.5
5.1
–28.2
–28.8
0
–22.6
–28.2 –32.1 –22.1
–22.1
–12.6
10.2
10.2
5.5
0
0
9.4
9.4
0
10.2
5.2
5.2
5.2
5.2
–10.2 –0.4
–0.5
10.2
5.2 5.2
0
0
AC19.6
AC3.7
2.5
2.5
0
1.1
4.9
5.1
2.6
0.2
3.9
3.9
5.1
2.6
2.6
4.6
2.6 2.6 2.6 2.6
2.6
0
0 0
0
0
2.6
2.6
2.5
2.5
2.5 2.5
2.5 4.1 3.5
2.5
2.5
2.5
2.4
2.7
5.0
2.6
0
2.5
0
2.4 2.6
2.6 2.6 2.5
2.5 2.5
2.5
2.4 2.5 2.5 2.5
2.5
0
2.6
1.4
2.6
2.6
2.1
5.1
5.1
0
0
0
2.5
2.5
5.1
0
0
2.5 2.5 2.5 2.5
5.0 5.1 5.1 5.1
~
5.1
0
~
5.1
~
5.1
5.1
0
0
0
5.1
~
~
2.6
0
5.1
~
~
~ 0
5.1
5.1
~ 0 5.1 ~ ~
2.5 2.5
0
5.1
5.1
0
2.6
2.5
0
5.1 5.1
5.1
5.1 5.1
~
~ 5.1
0
5.1
5.1
0 0 0 0 0 0 0
5.1
5.1
5.1
5.1
5.1
0 0 0
0
0
5.1
0
5.1
2.4
2.8
0
0
0
0
5.1
5.0
0
5.1
0
0
0
0
0 5.1
–5.0
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
–22.3
–22.3
–22.3 –22.3
e
w
r
q
A
B
r
t
CIRCUIT CHANGES BY MARKET.
O : USED X : NOT USED
µ
PD78076GF-108-3BA
Z
Z
Z
Z
Z
Point
t
(EFN)
V : 0.2V/div, H : 0.5
µ
sec/div
AC, 1 : 1 probe
Test disc
SONY YEDS-18 (P/No. TX911730)
A-BEX TCD-782 (P/N. TX913350)
or Philips 5
: x1