Sony XR-2750 Service Manual page 22

Pin No. Pin Name I/O
49 TAPMUT O
50 ILLON O
51 SD_IN I
52 NOSESW I
53 TELMUT I
54 REL I
55 ACCIN I
56 TESTIN I
57 RC_IN1 I
58 PW_SEL I
59 MTLIN I
60 AD_ON O
61 KEYSEL I
62 SEKOUTSEL I
63 NC5 –
64 LCDCE O
65 LCDCKO O
66 LCDSO O
67 LCDINH O
68 CLK_SEL I
69 NC7 –
70 NC8 –
71 NC9 –
72 NC10 –
73 NC11 –
74 VREG O
75 GND –
76 X_OUT O
77 X_IN I
78 CE I
79 VDD –
80 RESET I
Tape muting control pin At muting: "H"
Illumination power supply control pin
At PW SEL on: ACC on: "H"
At PW SEL off: Power on: "H"
Station detection signal input pin
Front panel removal or attaching detection pin
Telephone muting detection pin "L": 20dB audio muting
Reel table rotation detection pin
Accessory voltage detection pin
Test mode setting pin
Rotary remote commander input pin (A/D input)
Power select switch input pin
AUTO METAL detection pin "L": METAL
Power supply control pin for A/D conversion
Key function setting pin
Active select pin for #• SEKOUT
Not used (Fixed at "H")
LCD chip enable output pin
LCD clock output pin
LCD data output pin
LCD brank indication control pin
Not used (Fixed at "H")
Not used
Not used (Fixed at "L")
Not used
Not used
Not used
CPU regurator output pin
GND
System clock output pin (4.5 MHz)
System clock input pin (4.5 MHz)
Fixed at "H"
Power supply
Reset input pin
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Function