Sony MDX-C6500RV Service Manual page 47

Pin No. Pin Name I/O
43 AVRH
44 AVRL
45 AVSS
46 KEYIN0
47 KEYIN1
48 RCIN0
49 DSTSEL
50 QUALITY
51 FMAGC
52 MPTH
53
VSM
54 VCC
55 RAMBU
56 TUNATT
57 VOLATT
58 ATT
59 AMPON
60 AMPATT
61 COLSW
62 COLSEL
63 VSS
64 DAVN
65 FILE
66 TEXT
67 NOSESW
68, 69 NCO
70 I2C SIO I/O
71 I2C CKO
72 NCO
73 X1A
74 X0A
75 NCO
76 KEYACK
77 BUIN
I Reference voltage (+5V) input terminal (for A/D converter)
I Reference voltage (0V) input terminal (for A/D converter)
— Ground terminal (for analog system)
Key input terminal (A/D input) (LSW901 to LSW908, S901 to S904)
I OFF, SOURCE, SOUND, MENU, PTY DSPL, LIST, ENTER, MODE,
SEEK/AMS - . m + > M, DISC/PRST +, PRST/DISC - keys input
Key input terminal (A/D input) (LSW810, LSW909 to LSW917)
I
Z, D-BASS, TA, AF, 6 to 3 SHUF 2, REP 1 keys input
I Rotary remote commander key input terminal (A/D input)
I
Destination setting terminal (fixed at "L" in this set)
I Noise level detection signal input at SEEK mode (A/D input)
I FM AGC detection signal input from the FM/AM tuner unit (TU1) (A/D input)
I Multi-path detection signal input from the RDS decoder (IC51) (A/D input)
FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU1)
I
(A/D input)
—
Power supply terminal (+5V)
Internal RAM reset detection signal input terminal
I
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset Not used (fixed at "H")
O
Muting on/off control signal output of the FM/AM tuner signal "H": muting on
Pre amplifier muting on/off control signal output to the electrical volume (IC151)
O
"L": muting on
O Audio line muting on/off control signal output terminal "H": muting on
Standby on/off control signal output to the power amplifier (IC611)
O
"L": standby mode, "H": ampifier on
Power amplifier muting on/off control signal output to the power amplifier (IC611)
O
"L": muting on
I Setting terminal for the illumination color "L": 2 color, "H": 1 color (fixed at "H" in this set)
I Setting terminal for the illumination color "L": amber, "H": green (fixed at "L" in this set)
—
Ground terminal
I
Data transmit completed detection signal input from the RDS decoder (IC51) "H" active
I Setting terminal for the custom file "L": unavailable, "H": available (fixed at "H" in this set)
I Setting terminal for the CD text "L": unavailable, "H": available (fixed at "H" in this set)
Front panel block remove/attach detection signal input from the nose detection switch (SW504)
I
"L": front panel is attached
O
Not used (open)
Two-way data I2C bus with the FM/AM tuner unit (TU1), RDS decoder (IC51) and electrical
volume (IC151)
I2C bus clock signal output to the FM/AM tuner unit (TU1), RDS decoder (IC51) and electrical
O
volume (IC151)
O
Not used (open)
O
Sub system clock output terminal (32.768 kHz)
I Sub system clock input terminal (32.768 kHz)
O
Not used (open)
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
I
and eject keys in the power off status On at input of "H"
Battery detection signal input from the SONY bus interface (IC701) and battery detect circuit
I
"L" is input at low voltage
Description
47