Yamaha GX-505 Service Manual page 28

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