Sony XR-C7220 Service Manual page 28

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Pin No. Pin Name I/O
40, 41
NCO
42 AVCC
43 AVRH
44 AVRL
45 AVSS
46 KEYIN0
47 KEYIN1
48 RC-IN0
49 DSTSEL
50 NOISE DET
51 D-BASS
52 MTP
53
VSM
54 VCC
55 RAMBU
56 POWSEL
TE
L 13942296513
57 NCO
58 TESTIN
59 DOOR-IND
60 EVOL MUTE
61 COLR SW
62 COLR SEL
63 VSS
64 NCO
65 MUTE
66 FILE
67 TEXT
68 AMP MUTE
69 FLASH-W
70 I2C SIO I/O
71 I2C CKO
72 RC-IN1
www
73 X1A
74 X0A
.
75 DAVN
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O
Not used (open)
—
Power supply terminal (+5V) (for A/D converter)
I Reference voltage (+5V) input terminal (for A/D converter)
I Reference voltage (0V) input terminal (for A/D converter)
—
Ground terminal (for A/D converter)
Key input terminal (A/D input) (LSW901 to LSW904, S901, LSW906)
OFF, SOURCE, MODE *, SOUND, SEEK/AMS = 0 – + ) +, SHIFT keys
I
input
Key input terminal (A/D input)
I (LSW801, LSW922, LSW923, LSW925, LSW926, LSW928 to LSW933)
6, PRESET DISC –/+, DSPL, 6, 5 ENTER, 4 n, 3 PLAY MODE, 2 SET UP, 1 N keys input
I Rotary remote commander key input terminal (A/D input)
I
Destination setting terminal (fixed at "L")
I
Noise level detection signal input at SEEK mode (A/D input) Not used (open)
I D-BASS switch (S981) input terminal (A/D input)
I Multi-path detection signal input from the RDS decoder Not used (fixed at "L")
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 from the XC61BN3312MR (IC651)
I
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset
I Power select switch (S501) input terminal "L": off (halt mode), "H": on (operation mode)
O
Not used (open)
I Setting terminal for the test mode "L": test mode, Normally: fixed at "H"
LED drive signal output of the tape window illumination and 6 indicators (LED801, LSW801)
O
"H": LED on "H" is output to turn on LED when front panel is opened
Muting control signal output to the electrical volume (IC401)
O
Volume minimum: "∞" output ("H" active)
Setting terminal for the illumination color
I
"L": 2 colors, "H": 1 color (fixed at "L" in this set)
I Setting terminal for the illumination color "L": amber, "H": green (fixed at "H" in this set)
—
Ground terminal
O Not used (open)
O Audio line muting on/off control signal output terminal "H": muting on
Input terminal to set whether custom file function is provided or not
I
"L": none, "H": provided (Fixed at "H" in this set)
Input terminal to set whether CD text function is provided or not
I
"L": none, "H": provided (Fixed at "H" in this set)
O Muting on/off control signal output to the power amplifier (IC611) "L": muting on
Internal flash memory data write mode detection signal input terminal "L": data write mode
I
Not used (fixed at "H" in this set)
Two-way data bus with the electrical volume (IC401)
O
Bus clock signal output to the electrical volume (IC401)
I Rotary remote commander shift key input terminal "L": shift
O
Sub system clock output terminal (32.768 kHz)
x ao
y
I
Sub system clock input terminal (32.768 kHz)
i
Data transmit completed detect signal input from the RDS decoder "H" active
I
Not used (fixed at "L")
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Function
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