Yamaha GX-505 Service Manual page 36

A B
GX-505/GX-505VCD
BLOCK DIAGRAM
1
AUX 12
IN
1
TUNER 14
AUX/MD
5
TAPE 15
OUT
2
CD 11
4
2
4
9
TUNER
TAPE PB
CD
TAPE REC
3
(OPE) Page 67 (VCD only)
MIC1
JK800
4 MIC MIXING
D.ECHO
9 IC800
7,12 8 40,41,42
4
MIC2
MIC VOLUME
VR800
JK801
MIC SW
CD CONTROL
5
TUNER CONTROL
36
6
C
(INPUT) Page 64, 65
IC21
INPUT
13 3 1
SWITCH
3 5 7
IC3
9,10 Q29,30
INIA
REC
3 INIB
3 5
SWITCH
8 IC8
IC5
62,63
IC9
5,6 12,13
(GX-505 only) 1 7
Q5,7
RECB
IC8 67
Q6,15
RECA
IC8 66
IC806
4 2
(OPE) Page 66, 67
6 8
31
32
IC805
36 4 2
35 6 8
DATA
8MHz 32.768MHz
CLOCK
XL402 XL401
LATCH
38 39 36 37 62 63 66 67
16
17
46
86
8
41
10
SPEANA
| |
IC26
44
13
17
2
20
|
22
25
26
16-19, 23, 33, 49 32 3 35
RESET
D,SEL
U800
SW2
REMOCON
(R,T)
D E
HP AMP
IC10
49 21 MUTE 5 7
64 28 Q23.24 3 1
VOLUME LEVEL
CONTROL
GEQ
IC7
14 15
35 34
24 25 26
IC8 49,17,16
TUCE,TUDO,TUCLK
22 4 2
18 6 8
YMERSION
11
IC807
TONE.CONT.
12
IC804
13
23 24 19 20
BASS TREBLE
VR804 VR802
+12M
12V
-12V
-27V
9.0V
VCC
K9V
RESET
U5.6V
DECK CONTROL
5.0V
THER K9V
71 - 80,87 - 89,92 - 97
61 16 17 49 15 11
SMUTE 5.0V
59
AMP
MUTE
24
IPRT 9.0V
90
SPON
58
PRON
57
SYSTEM CPU
IC8 HPIN
85
ACIN
29
48
47
12
13
13
|
50 91 81,82 4 - 8
16
KEY CONT
VOL.
SW800-827,829-831
VCC ROTARY
ENCODE
SW828
SW826
VCD only
2
3
(OPE) Page 66, 67
4
37
F
IC11
MUTE
3 1
Q21
SMUTE
IC8 59
(OPE) Page 66, 67
MUTE
Q801
Q802
POWER AMP
IC201
MUTE
18 14
Q201
22 15
Q202
17
±HB
±LB
IC8 11
THER
AMPMUTE
IC8 24
IC8 90
PROTECTION
IPRT
SPON
IC8 58
RY201
Q27
u5.6V u5.6V
D11
Q19
IC8 57
PRON
C103
Q33
K9V
D211
+HB
Q26 Q206
5.0V -27V
-27V
-HB
Q25 Q204
9.0V 12V
+LB D212
12V
Q218
+12M +12M
-LB
Q207
-12V -12V
IC8 15
1 VPRT
| 1
FAC1
FL
12 FL DISPLAY 2
DRIVER
14
V800
IC803 FAC2
58
|
59
64
32
D213
CDB
(TO CD)
VP
-27V SUB
+5V
LED
DRIVER
5
IC802
|
16
G H
SUBWOOFER
OUT
5.0V
HP,IC8 85
HP JACK
JK802
TE201
RY201
+
-
+
-
(MAIN) Page 68
(INPUT) Page 64, 65
D21
IC8 29
ACIN
D22
T203
D215
SUBB
RY203
T202
F217
RY203
F201
+12V