Block Diagram - Yamaha GX-900 Service Manual

A B
GX-900

BLOCK DIAGRAM

1
CD
TRAVERSE UNIT
A
35
B
36
C
HEAD
D
AMP
IC1
+5
AN8806SB
E
33
F
34
2
2
LASER
Q1
LD
LD
DRIVE
GND
MON
-5
FCS 20
21
TRK
25
26
3
ACT
MOTOR
5 DRIVE
M
SPINDLE
6
10
M FEED
11
LIMIT SW
4
5
62
6
C
IC10
TP1
15
73
MUTE
75 Q9,10
10 44
3 27
13
29
SERVO SIGNAL
| 30 30
PROCESSOR
17 |
DF.DAC
19 41
IC5
|
25
58 8
1 16
9
|
59
11
18
XL1
12
16.9344MHz
21,22,24-28 7,10,14,15
62,67,68
8,11,13,23,
XL2
8MHz
38
39
30
BUSS
|
BUFFER
41
IC7
CD CPU
IC11
69
70
3
26
4
57,58 59,60 1,3-7
12
13
19
27
|
29
1,9 1,9
MOTOR MOTOR
DRIVE DRIVE
IC3 IC4
3 7 3 7
M M
LOADING ROTARY UNLOAD LOAD ADDRESS STOP
CD MECHA
D E
CD DIGITAL OUT
CASSETTE MECHA
CD
R/P HEAD
E HEAD
64
19 LOAD
|
CD CONTROL
22
35
65
Q5,15 Q8 LOAD OUT
+6 +6 CDB LOAD IN
ON/OFF
R,REC
+5 +5
F,REC
CASS
CrO 2
SOL
SENSOR
OUT
+5V
PLAY
M
UP/DOWN
63
F
DECK
+
41
44
-
DOLBY
48 R/P AMP
9,1 7,3 37
IC6
PB LEVEL
R/P
VR1,4
SWITCH
IC2
9
26
IC8 73 REC
E+
18,19 4 10
E-
BIAS
Q8 Q10
TRAP
L2,3
BIAS
VR2,3
BIAS
OSC.
Q13,14,17,
L1,Q12
M
2 MOTOR 5
DRIVE
10 6
IC1
IC 95 OPSW
5.0V
IC8 92 CLSW
IC8 94 RECINHR
IC8 93 RECINHF
IC8 87 CASS
IC8 89 CrO 2
SOL
DRIVE
Q3,4
IC8 96 REEL
Q1
5.0V
IC8 88 PLSW
MTR
MOTOR
MTR
DRIVE
Q2,11
SPEEDB
TAPE SPEED
SPEEDA
VR7
G H
32
TAPE REC
5
REC LEVEL
13
24 Q35,36
14
IC8 76 TPEQ
VR5,6
23
11
TAPE PB
26
29 IC8 72 RMUTE
3 IC8 97 MUSIC
17 27
Q16
Q9
IC8 73 REC
IC8 76 TPEQ
IC8 75 DOLBY
IC8 71 PBMUTE
BIAS
POWER
+B
18,34
IC8 74 BIAS
IC8 76 TPEQ
IC8 80 OPEN
IC8 79 CLOSE
IC8 77 SOL
IC8 78 CPM