Yamaha GX-700, Service Manual

Page: 41 / 93

A B C D E F G H
1
2
3
4
5
6
GX-700/GX-700VCD
■
PRINTED CIRCUIT BOARD (Foil side)
44 45
LO
AD SW LO
AD SW
UNLO
AD SW
UNLO
AD SW
LO
AD MO
T
OR+
LO
AD MO
T
OR-
VC VCC E D A B C F GND LD VR PD FCS+ TRK+ TRK- FCS-
LIMITSW
LIMITSW
FEED-
FEED+
SPD-
SPD+
ROTARY-
ADRESS SW
ADRESS SW
STOP SW
STOP SW
TU UP SW
COM
TU DOWN SW
FROM: MOTOR UNIT
(LOADING)
FROM: PICK UP HEAD
FR
OM:
MO
T
OR UNIT
(SPINDLE & FEED)
FR
OM:
MO
T
OR UNIT
(R
O
T
AR
Y)
FR
OM:
UP/DO
WN SW
FROM: VCD(2)
FR
OM:
INPUT(1)
FR
OM:
EFFECT(1)
FR
OM:
MAIN(1)
12V
-12V
L
AGND
R
DGND
U5.5V
DSO
/CS
/CDRES
DSI
/DCLK
VSEL
AGND
AGND
GND
GND
+B
TX
GND
+5
VIDEO
GND
VMUTE
16
30 1
15
GX-700VCD P.C.B. VCD(1) (Lead Type Device)
A3.3
CV
OUT
COUT Y
OUT
V
GND
V
GND
R+5V
D+3.3V D+3.3V
DGND DGND
XCK
EMPH
DILRCK HARD
Y
DISK
D
ID
ATA
HINT
SBCK VRST
HCK
HDIO
CDSCK
CDD
A
T
A
CDLA
CK
IPFLG HSEL SUBC
CLOCK BLKCK
1
9
1
9
GX-700VCD P.C.B. VCD(1) (Surface Mount Device)
36
19
1
18
58 41
12
0
21 40
41
60
61 80
30
31
50
51
80
81
100
1
5
17 14
8
81
4
71 17 14
8
17 14
8
q
w
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
0V
0V
BLKCK CLOCK SUBC HSEL IPFLG CDLA
CK
CDD
A
T
A
CDSCK HGIO HCK VRST SBCK HIMT DID
A
T
A
DISCK HARD
Y
DILRCK EMPH XCK DGND DGND D+3.3V D+3.3V R+5V VG
N
D
VG
N
D
YO
U
T
COUT CV
OUT
A+3.3V
BLKCK CLOCK SUBC HSEL IPFLG CDLA
C
K
CDD
A
T
A
CDSCK HDIO HCK VRST SBCK HIMT DID
A
T
A
DISCK HARD
Y
DILA
CK
EMPH XCK DGND DGND D+3.3V D+3.3V R+5V V
GND
V
GND
Y
OUT
COUT CV
OUT
A+3.3V
FROM: VCD(1)
FROM: VCD MODULE
GX-700VCD P.C.B. VCD(2)