Yamaha GX-505, Service Manual

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GX-505/GX-505VCD
GX-505/VCD
Port
SCLK2
SO2
SI2
P67
SCLK1
SO1
SI1
P63
P62
P61
P60
P47
P46
INT1
INT4
INT3
INT2
P41
INT0
/RESET
XCIN
XCOUT
XIN
XOUT
VSS
P27
P26
P25
P24
P23
P22
P21
P20
P17
P16
P15
P14
P13
P12
P11
P10
P07
P06
P05
P04
P03
P02
P01
P00
P37
P36
P35
P34
P33
P32
P31
P30
P97
P96
P95
No.
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
Function
LC72131/LC72720/M65853FP/LA2787/LV1017/LC75393/LC7536Y CLK OUT
LC72131/LC72720/M65853FP/LA2787/LV1017/LC75393/LC7536Y DATA OUT
LC72131/LC72720 DATA IN
STATION IN (TUNER)
[L : STATION AVAILABLE]
SYSTEM COMMAND CLOCK
SYSTEM COMMAND OUT
SYSTEM COMMAND IN
TUNER MUTE
[H : MUTE ON]
AMP MUTE [L : MUTE ON]
SYSTEM COMMUNICATION CD CE
CD RESET
SYSTEM COMMUNICATION MD CE
MD RESET
POWER DOWN AC PULSE IN
MD POWER DOWN
OPEN
REMOTE CONTROL SIGNAL IN
TUNER STEREO/MONO DETECT
OPEN
RESET
32.768 kHz IN (SUB CLOCK)
32.768 kHz OUT (SUB CLOCK)
8 MHz IN (MAIN CLOCK)
8 MHz OUT (MAIN CLOCK)
GND
SPECTRUM ANALYZER (BA3835F) A OUT
SPECTRUM ANALYZER (BA3835F) B OUT
SPECTRUM ANALYZER (BA3835F) C OUT
SPECTRUM ANALYZER (BA3835F) SEL OUT
LA2787/LV1017 CE
KARAOKE IC M65853 LATCH
FL DRIVER RESET
FL DRIVER CE
LC72131/LC72720/LC75393 CE
STANDBY LED ON
[ H : LED ON ]
TIMER LED ON [ H : LED ON ]
PRO LOGIC IC CONTROL-BC (Not used)
TEST PORT
TEST PORT
MD DIGITAL INPUT SELECT
MD DIGITAL INPUT SELECT
POWER RELAY CONTROL
[ H : ON ]
SPEAKER RELAY CONTROL [ H : ON ]
SUB WOOFER MUTE [ L : MUTE ON ]
PRO LOGIC IC CONTROL-A [ H : ON ] (Not used)
Y MERSION ON [ L : ON ]
4052 INPUT SELECT (Note 1)
4052 INPUT SELECT (Note 1)
4052 INPUT SELECT (Not used)
4052 INPUT SELECT (Not used)
4066 CONTROL
4066 CONTROL
LA7956 INPUT SELECT (Not used)
LA7956 INPUT SELECT (Not used)
VCR REC INHIBIT
[ H : INHIBIT]
DECK PLAYBACK MUTE
DECK REC MUTE
DECK AMP REC
DECK BIAS ON
DOLBY ON
Name
TUCLK
TUDO
TUDATA
/STAD
SYSCK
SYSO
SYSI
TUMUTE
/AMPMUTE
CDCE
CDRES
MDCE
MDRES
ACIN
PDN
REMO
STEIN
RESET
XCIN
XCOUT
XIN
XOUT
GND
SPEA
SPEB
SPEC
SPESEL
DLCE
KALATCH
FLRES
FLCE
TUCE
STLED
TMLED
/BC
TEST0
TEST1
DSEL0
DSEL1
PRON
SRON
/SMUTE
/A
/YMA
IN1B
IN1A
IN2A
IN2B
RECA
RECB
VSEL0
VSEL1
VCR
PBMUTE
RMUTE
REC
BIAS
DOLBY
IC8 : M38199EF [INPUT P.C.B.]
8 bit
µ
-COM (SYSTEM CPU)
27
I/O
O
O
I
I
O
O
I
O
O
O
O
O
O
I
O
I
I
I
I
O
I
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O