Yamaha CDR-D651 Service Manual page 21

A B
SCHEMATIC DIAGRAM ( MAIN )
1
CD HEAD AMP.
2
5.0
4.5
0
2.5
2.5
2.5
0
0
3 PU DRIVER
2.4
5.5
PICK UP 2.5
2.4
2.4
2.4
4
5
6
PIN CONNECTION DIAGRAM OF TRANSISTORS,
DIODES AND ICS.
2SC2878 1SR139 M5218AL
2SD400 1SS133
MTZJ5.6B
Anode
MTZJ5.1B
MTZJ6.2B
MTZJ30B
8
2A02M
7
1T2
E
C B
Cathode 1
2SD2396
D2SBA20 M5237L
2SB941
2SB1565
–
~ OUT
B C
~
E IN
COM
+
2SA933S S2VB20 M5290P
–
~
~
+
8 8
16
E
C B 1
NJM2068D-D LC75711NE
2SA1708
48 33
32
49
8 4
B
1 64
C 17
E
9
1 16
C D E
4
0
SPC + DAC
1.3
1.3
2.5
2.5
5.0
5.0
0
0
1
0
0
2.4
2.5 2.4
5.0
0
2.5
2.4
5.5
2.5
5.5
5.0
0
2.5
2.5
5.5
2.5
2.5
2.4
0 0
5.0
2.5
2.5
0
0
2.5
5.0
0
SYSTEM
0 CONTROL
5.0
0
5.0
5.0
5.0
5.0
0
5.0
5.0
0
0
0
0
5.0
5.0
4.8 4.3
5.0
0 4.9
5.0
4.9
0
OPE (1) OPE (1)
F G
5.0
6
7 0 0 3 4
0
5 1
0 4 2
0
-5.0 0
5.0
0 6
0 3 8 7
1 0 5 0
0 2 0 8
-5.0
2.5
5.0
5.0
0
0
5.0
0
0
0
0
0
3.5
4.7
2.5
0
5.0
7.9
7.9 0
0
7.9
0
0 0
0
0
0
0
7.9
7.9
0
0
-5.0
0
4
0 2
0
1
3
6
0
7
5 0
0
8
5.0
0
0
0
5.0 5.0
0
5.0
2
0
2.7
2.8
5.0
0
4.8
0
0
0
4.9
4.9
5.0 0
5.0 0
0 0
5.0 0
EEP
ROM
-5.0
0 2
4
1
3 0
0
0 6
7
5 0
5.0
0 8
CD-R Mechanism Unit
H I
IC1 : AN8882SB
Digital Servo Head Amp.
LPF
IC100, 101, 103, 107, 108 : NJM2068MD IC105, 106 : TC4052BF
Dual Op-Amp. Differential 4-channel Multiplexer
OUT1 1 8 +Vcc
–IN1 2 7 OUT2
+ – + –
+IN1 3 6 –IN2
–Vcc 4 5 +IN2
-8.0
0
0.3
0
IC109 : AN79L08-TA
Voltage Regulator
OPE (4)
IC300 : HD74HC125FP
2-Input NAND
0
0 0
0 -8.0
0
0 5.0
0 0 0 5 8
7
0
0 0
0
6
7.9 0
-5.0
0 3
4
1
0 0
2
0
-5.0
0
OPE (5)
0
-5.0
0
OPE (2)
-8.0 -12.3
OPE (2)
0
7.8 10.8
0
OPE (2)
OPE (2)
Point 4 TP1
Pin 10 of IC1 0.2V, 0.5µsec.
J K L
CDR-D651
IC2 : AN8785SB
PU Driver
VDD
16
13 X-COMMON
I/O c O/I 12 0X
I/O c O/I 14 1X
A 10
I/O c O/I 15 2X
11 3X
I/O c O/I
B 9
1 0Y
I/O c O/I
5
I/O c O/I 1Y
6
INH
I/O c O/I 2 2Y
I/O c O/I 4 3Y
3 Y-COMMON
8 7
VSS VEE
IC110 : AN78L08-TA
Voltage Regulator
Output Pass Transistor Rsc
R1
+ Excessive Electric
Standard Current Protection
Amp.
Voltage R2
–
+
Standard
Amp.
Voltage –
Heat
Protection Heat
Protection
Rsc Starter
Circuit
Excessive Electric
Current Protection
2 3 1
1 2 3
1C 1 14 Vcc
1A 4C
2 13
1Y 4Y
3 12
2C 4 11 4A
2A 5 10 3C
2Y 3A
6 9
GND 7 8 3Y
Point 1
Pin 59 of IC3
0V
Point 2
Pin 69 of IC301
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.
Åú ìd à≥ÇÕ ÅA ì‡ ïî íÔçR 10MÉ∂Çà ìd à≥åvÇ≈ ë™ íËǵ ÇΩ LJ Çà Ç≈ Ç∑ ÅB
Åú s Ø i ˝ A S « m i ƒ ˜ ¢ • B i •
" K v ¨ Œ ˝ A p [ c X g L ‡ Œ ˜ ¢ Ø i g p ˜
› ‡ ¢ B
{ æ H } ˝ W æ H } ¯ • B ˙ ‰ \ ¨ › ˇ X • Ø – ˘ "
† · ¢ • B
E-24/J-20