Yamaha CRX-E300 Service Manual page 48

A B
CRX-E300
SCHEMATIC DIAGRAM (OPERATION)
1
2
3
4
5
6
OPERATION KEY
TIMER
7
8
Page 47 H6 Page 47 E1
to INPUT (2) to INPUT (1)
9
48
C D E
FLUORESCENT DISPLAY
~
~
~
~
~
~
µ-COM
~
-30.1
-30.3
M30217MAAFP
0
1.8
0
3.5
4.9
4.9
0
1
2
4.9
4.9
4.8
Page 47 D1
to INPUT (1)
F G
-25.3 -30.3
~
~
~
~
~
~
~
~
~
~
~
~
~
~
~
0
0.4
EEPROM
4.8
4.8 0 0.4 0
0
4.8 0 4.8
3
4.9 5.5
4.8 5.5
B
4.7
0
0
0
0
REMOTE SENSOR
0 4.9 4.9
Page 50 D3
to MAIN (1)
H I
Point 1 Pin 13 of IC201
5.5 11.7
IC202: TC74HC4051AF
6.2
Analog Multiplexer/Demultiplexer
6.2
INHIBIT VCC
6 16
0
A
11
LEVEL
11.6 11.6 B 10
CONVERTER
A
C 9
10.9
GND 8
VEE
7
0 13 SW
7.5 6.9
1
14
6.9
2 15
0 3 12
4 1
5 5
6
2
7 4
# All voltage are measured with a 10MΩ/V DC electric volt meter.
# Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
# Schematic diagram is subject to change without notice.
T CHINA
L SINGAPORE
K KOREAN
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SC4488 2SA1037K 1SS355
DTC144EKA UDZ5.1B
UDZS6.2B
C
E
B
B
C
E
J K L
Point 2 Pin 11 of IC201
Point 3 emitter of Q203
and collector of Q201
Q203 E
0V
Q201 C
0V
POWER ON POWER OFF
(Connect the power cord) (Disconnect the power cord)
BINARY TO 1-OF-8
DECODER WITH INHIBIT
INPUT STATES
"ON" CHANNNEL
INHIBIT C B A
3 COM
0 0 0 0 0
SW
0 0 0 1 1
SW 0 0 1 0 2
0 0 1 1 3
SW
0 1 0 0 4
SW
0 1 0 1 5
SW
0 1 1 0 6
SW
0 1 1 1 7
SW
1 X X X NONE
IC203 : S-29390AFJA
CMOS 4kbit Serial EEPROM
Memory array Address decoder
Data register Output buffer 6 DO
DI 5
8
TEST
Mode decode logic
3
CS
1 NC
2 Vcc
SK 4 Clock generator 7 GND
S-29390AFJA TC74HC4051AF M30217M8-AXXXFP
80 51
81 50
Anode
8
8 4
16
1
100
31
1
Cathode
1 30