Sony CDX-3900R Service Manual page 20

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Pin No. Pin Name
61 COLSW
62 COLSEL
63 VSS
64 DAVN
65 FILE
66 TEXT
67 NOSESW
68, 69 —
70 I2C SIO
71 I2C CKO
72 —
73 X1A
74 X0A
75 —
76 KEYACK
77 BUIN
78 ILLIN
79 TELATT
80 —
81 TEST IN
82 ACC IN
83 —
84 LOCKIN
TE
L 13942296513
85 RCIN1
86 HSTX
87 MD2
88, 89 MD1, 0
90 RSTX
91 VSS
92 X0
93 X1
94 VCC
95 – 97 —
98 DIM SEL
99 TAP CD
100 – 118 —
119 VSS
120 PW ON
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I/O
Illumination color switch input ("L": 2 colors, "H": 1 color)
I
(Fixed at "L" in CDX-3900R/4000R, "H" in CDX-4000RX)
I Illumination color select input ("L": AMBER, "H": GREEN) (Fixed at "L" in this set)
— Ground
I Block synchronization detection input of RDS data.
I Custom file setting input
I CD text setting input
I Front panel attachment detection input
— Not used. (Open)
2
I/O I C BUS serial data input/output
I/O I 2 C BUS serial clock input/output
— Not used. (Open)
— Low speed oscillation connecting pin (32.768 kHz)
— Low speed oscillation connecting pin (32.768 kHz)
— Not used. (Open)
I Key acknowledge input
I Backup voltage detection input
I Illumination (ILLIN) detection input (Fixed at "L" in this set)
I Telephone (TEL) detection input (Fixed at "L" in CDX-3900R)
— Not used. (Open)
I Test mode setting input
I Accessory power supply (ACC) detection input
— Not used. (Open)
I MD LOCK detection input
I Rotary commander SHIFT input
I Hardware standby setting input
I Connect to VSS in this set.
I Connect to VCC in this set.
I Reset input
— Ground
— High speed oscillation connecting pin (3.68 MHz)
— High speed oscillation connecting pin (3.68 MHz)
— Power supply pin (+5 V)
— Not used. (Open)
Dimmer select input ("L": With dimmer select, "H": Without dimmer select)
I
(Fixed at "L" in this set)
I TAPE/CD select input ("L": CD, "H": TAPE) (Fixed at "L" in this set)
— Not used. (Open)
— Ground
O System power control output
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2 9
8
Pin Description
Q Q
3 6 7 1 3 1 5
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9 4 2 8
0 5 8 2 9 9 4 2 8
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9 9
9 9