Sony CDX-GT420U Service Manual page 35

Pin No. Pin Name
65 ILLUMI SEL
66 to 68 NCO
69 B OUTSEL
70 AREASEL 2
71 AREASEL 1
72 AREASEL 0
73, 74 NCO
75 TUATTIN
76 to 80 NCO
81 RE IN1
82 RE IN0
83 SA IN
84 CYRIL SEL
85 NSMASK
86 TUATT
87 RDS ON
88 QUALITY
89 SADATA
90 SACLK
91 KEYACK0
92 KEYACK1
93 VSM
94 KEYIN1
95 KEYIN0
96 DAVSS
97 RCIN0
98 AVRH
99 DAVDD
100 LCD CE
CDX-GT420U/GT424U/GT427UE/GT470U/GT470US
I/O
I Illumination voltage setting signal input for panel
O Not used. (Open)
I Black out setting signal input
I Destination setting pin 2
I Destination setting pin 1
I Destination setting pin 0
O Not used. (Open)
I Tuner mute zero cross detection signal input
O Not used. (Open)
I Rotary encoder signal input 1
I Rotary encoder signal input 0
I Spectrum analyzer signal input
I Cyril select signal input
O Noise mask signal output
O Tuner mute control signal output
O RDS IC power supply control signal output
I Noise detection signal input
O Spectrum analyzer data signal output
O Spectrum analyzer clock signal output
I Key Acknowledge detection signal input (Rotary command signal input)
I Key Acknowledge detection signal input (Front panel signal input)
I S meter voltage detection signal input
I Key signal input 1
I Key signal input 0
— Ground pin for A/D converter
I Rotary commander key signal input
— A/D converter external reference power supply pin (+3.3V)
— A/D converter power supply pin (+3.3V)
O Liquid crystal display panel chip enable signal output
Description
"H": 10.4V, "L": 9V
"H": Block out
"H": Cyril select
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