Sony CDX-CA900 Service Manual page 14

CDX-CA900/CA900X
Pin No. Pin Name
51 NC
52 MPTH
53 VSM
54 VCC
55 BUS/AUX
56 NS MASK
57 BOOT
58 DOORIND
59 to 62 —
63 VSS
64 CD PACK
65, 66 (NCO)
67 CD SELFSW
68 —
69 FLASH W
70 I2CSIO
71 I2CCKO
72 KEYACK
73 X1A
74 X0A
75 DAVN
76 (NCO)
77 BU IN
78, 79 —
80 ADON
81 NOSESW
82 FLASH ON
83 PWON
84 —
85 RAMBU
86 HSTX
87 MD2
88, 89 MD1, 0
90 RESET
91 VSS
92 X0
93 X1
94 VCC
95, 96 NC
97 to 101 (NCO)
MODELSEL0
102
U•E/J (P)
103 10k/9k (P)
104 (NCO)
105 CD MON
106 CD ON
107 RCIN1 (P)
108 TESTIN (P)
109 TELATT (P)
110 ILLIN (P)
111 —
112 (NCO)
113 TUNON
14
I/O
O Not used. (Open)
O Not used in this set. (Open)
I S-meter signal input from tuner unit (TUX201)
— Power supply pin (+5 V)
O BUS/AUX audio ground select signal output "H": BUS
O Tuner noise mask signal output (E model)
O Display microcomputer write control signal output to sub system control (IC701)
O Front panel indicator signal output
I Not used in this set. (Connect to ground.)
— Ground pin
I Servo IC CD text pack synchronization signal input
O Not used. (Open)
I CD mechanism self load position detection switch signal input (SW2)
O Not used. (Open)
I Flash write mode detection signal input
O Tuner (TUX201), electronic volume (IC301) communication data signal output
O Tuner (TUX201), electronic volume (IC301) communication clock signal output
I Key acknowledge detection signal input
— Low speed oscillation signal input (32.768 kHz)
— Low speed oscillation signal input (32.768 kHz)
I RDS data block synchronization detection signal input (E model)
O Not used. (Open)
I Back up power detection signal input
O Not used. (Open)
O Power control signal output of A/D converter
I Front panel attachment detection signal input from nose detect switch (S102) "L": ON
O Flash write jig power supply signal output
O System power control signal output
O Not used. (Open)
I Reset detection signal input of RAM
I Hardware standby signal input "L": Standby mode
I Operation mode signal input Connect to ground in this set.
I Operation mode signal input Connect to VCC in this set.
I Microcomputer reset signal input
— Ground pin
— High speed oscillation signal input (3.68 MHz)
— High speed oscillation signal input (3.68 MHz)
— Power supply pin (+5 V)
O Not used. (Open)
O Not used. (Open)
I Not used. (Open) Destination detection signal input
I Not used. (Open) Destination detection signal input
O Not used. (Open)
O CD mechanism power control signal output to power supply (IC801)
O CD mechanism voltage control signal output to power supply (IC801)
I Rotary commander signal input from remote in jack (J651)
I Test mode set up detection signal input
I Tell mute detection signal input
I Illumination line detection signal input "L": Dimmer on
O Not used. (Open)
O Not used. (Open)
O Tuner on signal output
Pin Description