Yamaha CRX-E300 Service Manual page 50

A B
CRX-E300
SCHEMATIC DIAGRAM (MAIN)
1
Q Q
3 7 6 3 1 5 1 5 0
VOLTAGE SELECTOR
240V 1-2/5-6
220V 2-3/6-7
110V 3-4/7-8
120V 4-5/8-1
2
3
0
5.1
2.6
4
T E
L 1 3 9 4 2 2 9 6 5 1 3
5
6
7
w w w
8
Page 47 B8
to INPUT (3)
9
50
C D E
12.1 29.4
0
SUB POWER SUPPLY
0
5.1 29.4
11.5
0
5.0
12.8
0
0.7
5.5
0
Page 48 D3
to OPERATION
0
-30.9
-30.9
-62.7 -48.7
-30.4
14.9
-63.2
14.4
0
14.4
14.4 0
-0.1
0
-0.7
0
0
0
0.7
1.3
1.3
0
-14.7
-15.0
29.5
29.5
-1.1 1.1
0.5 0
0.5
-0.5
0.6 0.6 -1.1
0 0
-28.4 -29.4
0
-0.6
-0.6
-29.7
0
0
-1.1
-1.1
-14.8 -29.7
-28.4
-29.0
MUTING
POWER AMP
-29.0
-29.7
-14.8 -28.4
-1.1
0 -1.1 -29.7
0
-0.6
-0.6
0
-28.4 -28.4
0
0 -1.1
0.6 0.6
-0.5
0.5 0
1.1
1.1 0.5
29.5
29.5
x a o
. i
F G
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# All voltage are measured with a 10MΩ/V DC electric volt meter.
# Components having special characteristics are marked s and must be replaced
# Schematic diagram is subject to change without notice.
5.4 AC
11.6
11.5
5.5
13.0
0 AC
9.8
-12.3 MAIN POWER SUPPLY
-11.8
-24.2
0
Q Q
3 7
29.5
29.4
RELAY
28.8 5.1
5.1
29.4
2.3 DRIVE
MUTE 1.6
DRIVE
PROTECTION
29.5
29.4
29.2
0 0
0
29.3
0
0
0
0
0
0
0
0
0 0
0.8
0
0
0
29.3 0.8
29.4 28.7
u 1 6 3
y
MUTING
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H I
with parts having specifications equal to those originally installed.
2 4
8 9 9
AC
4.3
AC
9.5
AC
44.5
29.5
0
-29.7
6 3 1 5 1 5 0 8 9
IC400: NJM78M12FA
Voltage Regulator
m
c o
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
.
2SA970 2SA1317 2SD2396 2SA1693 2SA1708
2SA1015 2SC1740S 2SC4466 2SC4488
2SC1815 2SC3330
2SC1890A
2SC2229
2SC2240
2SC2878
B
C
E
E E
C B C B B C B
E C E
J K L
2
8 9 9
x: NOT USED
O: USED / APPLICABLE
2 4 9 8 2 9 9
IC401: NJM78M05FA
Voltage Regulator
INPUT
V
IN
OUTPUT
V OUT
COMMON
GND
1SS133 D3SBA20 S1NB20 NJM78M05FA
1SS270A NJM78M12FA
1SR139
HZS5B2TD +
HZS6A3
–
Anode
HZS12A2TD
HZS152TD
~
HZS302TD
–
~
~ 3: IN
~ 1: OUT
2: COM
+
Cathode