Yamaha GX-700, Руководство по обслуживанию

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A B C D E F G H
1
2
3
4
5
6
I J K L M N O
7
8
9
10
GX-700/GX-700VCD
■
SCHEMATIC DIAGRAM (GX-700VCD VCD)
* 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.
Point q (Pin59 of IC5)
V : 5V/div H : 50 nsec/div
DC range 1 : 1 probe
Point w (Pin39 of IC11)
V : 2V/div H : 50 nsec/div
DC range 1 : 1 probe
IC2 : AN8803SB
Digital Servo Head Amp
36 PDAC
EQ
+
35
PDBD
+
31 PDFR
34 PDF
+
32 PDER
33 PDE
+
+
+
VCBA
+
+
VCBA
29
F
.BAL
7
RF OUT
6
RF–
+
27
FEOUT
28
FE–
+
VCBA
+
VCBA
+
+
30
TBAL
+
24
CR
OSS
+
25
TEOUT
26
TE–
8
RF IN
RF
DETECT
9
C.
AG
C
AGC
10
ARF
17
RF DET
ENV DETECT
11
C.
E
N
V
12
C.
E
A
19
ENV
BDO
OFTR
13 C.SBDO
14 BDO
15 C.SBRT
16 OFTR
18 GND
5 VCC
+
23
TEBPF
+
22
VDET
+
20 VREF
1
PD
4
LDP
3
LDON
2 LD
21
LD OFF
– +
OUT1
–IN1
–VCC
+VCC
OUT2
1
2
3
4 5
+IN1 –IN2
+IN2
– +
6
7
8
IC10 :
µ
PC4570G2
Dual OP-Amp
IC1 : LA6541D
4 Channel BTL Driver
VCC
MUTE
VIN1
VG1
VO1
VO2
GND
GND
1
2
3
4
5
6
7
8
GND
VO3
VO4
VG2
VIN2
REG OUT
REG IN
9
10
11
12
13
14
15
VCC
VREF
VIN4
VG4
VO8
VO7
GND
GND
30
29
28
27
26
25
24
23
GND
VO6
VO5
VG3
VIN3
CD
RES
22
21
20
19
18
17
16
RESET
+
–
+
–
REGULATOR
LEVEL SHIFT
3
LEVEL SHIFT
2
BTL AMP
3
BTL AMP
2
LEVEL SHIFT
4
11K Ω 11K Ω LEVEL SHIFT
1
BTL AMP
4
VCC
11K Ω 11K Ω
BTL AMP
1
IC3, 4 : TA8409S
Full Bridge Motor Driver
9
2 6
7
3
8
5
1
STAND-BY
CIRCUIT
VREF
CIRCUIT
THERMAL
SHUTDOWN
CIRCUIT
VCC VS
VREF
OUT 1
OUT 2
IN 1
IN 2
GND
IC7, 9 : TC74HC125AF
Quad 3 State Bus Buffers
1A
1Y
1C Vcc
4C
1
2
3
4 11 2C
4A
4Y
12
13
14
2A
2Y
3C
3A
5
6
7 GND 3Y 8
9
10
IC13 : TC74HC04AF
Hex Inverters
1A
1Y
2Y
VDD
6A
1
2
3
4 11
2A 6Y
5A
12
13
14
3A
3Y
5Y
4A
5
6
7 VSS 4Y 8
9
10
IC8 : TC74VHC14F
Hex Schmit Trigger Inverters
VDD 14
I6 13
O6 12
I5 11
O5 10
I4 9
O4 8
I1 1
O1 2
I2 3
O2 4
I3 5
O3 6
VSS 7
0V 0V
NO. TERMINAL I/O FUNCTION
1 A+3.3V +3.3V POWER SUPPLY FOR ANALOG VIDEO
2 CVOUT O COMPOSITE VIDEO OUT
3 COUT O C VIDEO OUTPUT (S)
4 YOUT O Y VIDEO OUTPUT (S)
5 VGND ANALOG VIDEO GROUND
6 VGND ANALOG VIDEO GROUND
7 R+5V D5V POWER SUPPLY
8 D+3.3V D3.3V POWER SUPPLY
9 D+3.3V D3.3V POWER SUPPLY
10 DGND DIGITAL GROUND
11 DGND DIGITAL GROUND
12 XCK I AUDIO EXTERNAL FREQUENCY CLOCK
13 EMPH O AUDIO EMPHASIS OUTPUT
14 DILRCK O AUDIO LEFT RIGHT CLOCK
15 HRDY O HOST DATA READY
16 DISCK O AUDIO BIT CLOCK
17 DIDATA O AUDIO DATA SERIAL BUS
18 HINT O HOST INTERRUPT
19 SBCK O SUBCODE CLOCK FOR CD-G
20 VRST I HARDWARE RESET (LOW ACTIVE)
21 HCK I HOST CLOCK
22 HDIO I/O HOST SERIAL DATA BUS
23 CDSCK I CD BIT CLOCK
24 CDDATA I CD DATA
25 CDLRCK I CD LEFT RIGHT CLOCK
26 IPFLG I CD DATA ERROR FLAG (C2P0)
27 HSEL I HOST ADDRESS/DATA SELECT
28 SUBC I SUBCODE DATA FOR CD-G
29 CLDCK I SUBCODE FRAME SYNC FOR CD-G
30 BLKCK I SUBCODE BLOCK SYNC FOR CD-G
CONNECTION TERMINAL SPECIFICATION
NOTE: None of the components of the VCD module can be supplied
separately. Only a VCD module unit (VZ150200) is available.
VCD MODULE
VZ150200
2. SUBCODE INTERFACE
3. AUDIO OUTPUT INTERFACE
4. HOST INTERFACE
HOST READ TIMING
HOST WRITE TIMING
CD HEAD AMP
SPC & DAC
ACT
MOTOR
DRIVE
MOTOR DRIVE
CD CPU
LPF
MUTING
REGULATOR
REGULATOR
CD(Lch)
2.4 2.4
0
0
1.5 1.2
2.4
2.5
2.5
2.4
2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4
0.1 3.8
4.9
0 4.9
2.4
2.9 2.5
3.6
1.6
3.8
3.2 3.5 0.6
3.5
0
0
0
3.8
4.4
1.9
0 0.2
0.6
0
.2
6.3
6.2
2.4
2.4
2.4
3.0
0
0
0
2.8
2.7
2.4
2.4
6.3
2.5
2.4
2.4
2.7
2.7
0
0
0
3.1
2.4
2.4
2.4
0.8
2.5
6.2
0
0
0
6.2 0.9
11
.1
0
1.1
4.8
0
0
4.8
1.1
0
11
.1
1.2 2.7
0
0
6.2
0
0
4.7
0
2.5
1.2
2.5
2.2
4.9
0
0
2.4
2.3
4.9
0
4.9 4.7
2.4
0
2.4 4.9
0
2.5 2.4 2.5
4.9 0.6
0
1.2 0.2
0
2.4 2.5 2.5 2.6 2.3 2.4 2.4 2.4 2.4 2.4 2.3 2.4 2.4
4.3
4.9
0
~
4.8
0
0
0
0
4.8
~
0
~
0
4.9
2.4
2.4
2.4
4.8 5.5
8.5 4.9
7.9
7.9
0
1.2
1.8
1.2
1.2 0
0
0
2.7
0
0
0
0
0
6.8
6.8
6.8
6.3 11.1
4.8
0
4.8
4.8
0
0
4.8 4.8
4.8
0
4.8
4.8
~
~
~
~
4.8
0
0
0
4.9
4.8
0 0
0
~
4.6 4.3 0 0
~ ~
4.8 0 0 4.8 0 0 0 0
0 0
4.8
0
0
0
0
0
0
0
0
4.8
0
0
0
0
0
0
0
0
0
0
4.3
0
4.8
4.7
2.0
2.3
0
0
0
0
0
0
0
0
0
4.8
0
0
0 0 0
0 0 0 0 0 0 0 0 0
4.7 4.8 4.8 4.8 4.8
0 0 0 0 0 0 0
0 4.8
4.8
4.8
4.8
-11.9
-11.9
0
0
0
0
-11.9
0
0
0
-12.0
12.4
0
0
0
4.8
0
0
2.4 2.4
4.9
4.9 4.9 0
0
4.8
0 0
0
0
0
0
4.8
4.8
0
~
4.8 4.8
4.8
q
w
8 3
1
2
6
5
7
4
1
2
5
4 3
6
14
7
3
7
5
6 3
4
14
2
1
5
4
6
2 1
14
12
13
11
10
9
4
6 5
2
1
8 9
7
3
8
14
10
11
VCD (1)
VCD (2)
67
MAIN(1)
P73
A-2
INPUT(1)
P69
A-9
EFFECT(1)
P72
I-5
EFFECT(1)
P72
A-5