Yamaha CRX-E300 Service Manual page 49

A B
SCHEMATIC DIAGRAM (CD)
1
2
to CD
MECHANISM
UNIT
4.5
3.9
2.0
LD DRIVE
3
4
5
PICK UP DRIVER
2.5 1.9
2.5 0
2.2
2.2
4.9
2.5 2.5
2.5 4.9
0 0
2.5
2.5 2.5
to CD
6
MECHANISM 4.9 4.9
UNIT
2.2 2.2
2.2 2.2
2.0 3.4
2.4 0
7
to CD
MECHANISM
UNIT
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SD1938F 2SB1132 NJM2068MD TC74HC125AF AN8785SB AN8399SA-E1
8
15
21
30
22
C
14
8 4 7
E 28
E 14
C 1 8
29
B
B 7
1
1
9
C D E
CD HEAD AMP
CD
0
2.5
2.5
0
2.5
MN35511AL
60 41
61 40
17
16
32
80 21
1
1 20
F G
4.6
2.6 5.1
1.4 0
DSP-DAC
2.6 ~
5.1
2.6
2.1 0.1
0
5.1
5.1 0
0
0
5.0
5.1
5.1
2.6
1
0 0
0 5.1
2.5
2.5
5.1
0 12.1
0
0
0
0
0
-11.8
K KOREAN
H I
Point 1 Pin 59 of IC406
Page 50
to MAIN (1)
5.1
14
0 2 4.9
3
1
0
4
5.1 6 5
4.8
8 4.9
0 9
10
0
13
5.1 11
12
0.1
7
0
IC404: AN8399SA-E1
CD Head Amp.
A
C
B
D
E
F
# 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 VREF
installed.
# Schematic diagram is subject to change without notice.
J K L
CRX-E300
IC407: AN8785SB
5-Channel Power OP-Amp System Driver
16 10 12 11 18 17 14 13 19 1 28 26 25 24
Thermal
Protection
Circuit
Standby
4 IN-
Band gap
+ + + + + + + + + +
V CC /V REF - - - - - - - - - -
5 IN+
Reset Circuit
+ -
1.25V
3 OUT
- + - + - + - + - +
+ -
6 VREF
SW
7 9 8 21 15 20 23 27 2 22
H3
IC402: NJM2068MD
Dual OP-Amp.
OUT 1 8 +V
1 CC
–IN 2 7 OUT
1 2
+ – + –
3
+IN 1 6 –IN 2
–V CC 4 5 +IN 2
IC410: TC74HC125AF
Quad Bus Buffer
Page 47 G2
to INPUT (1) 1G 1 14 Vcc
1A 2 13 4G
2Y 3 12 4A
2G 4 11 4Y
2A 5 10 3G
2Y 6 9 3A
GND 7 8 3Y
Page 47 G3
to INPUT (1)
4 5 6 8 9 12 13 14 15
RF EQ AGC BDO OFTR
CEA
10
NRFDET 3TENV
11 3T OUT
16 NRFDET
32
AMP GCA BCA
31 22 FEN
SUBT –
30 23 FEOUT
+
AMP GCA BCA
29
27 AMP GCA BCA
20 TEN
SUBT –
21 TE OUT
+
28 AMP GCA BCA
–
2 LD
+
+
19
–
1 PD
BAND GAP
18 24 26 25 7 17 3
49