CDC-X237/X437
Y IC901 LC72358N-9B50 (SYSTEM CONTROL) (MAIN BOARD)
Pin No.Pin NameI/OPin Description
1XINISystem clock oscillator input (4.5 MHz)
2TEST2NNot used. (Open)
3CD DATA INNNot used. (Open)
4NCNNot used. (Open)
5NCNNot used.
6E-VOL DOODate output for volume level control
7LCD DIILCD driver date signal input
8LCD DOOLCD driver date signal output
9LCD CLOOLCD driver clock signal output
10LCD CEOLCD driver CE signal output
11SQ OUTISub-code Q input terminal
12COINOCommand output terminal for DSP
Transfer-out clock for command output or output terminal for sub-code transfer
13CQCKO
clock from SQ OUT
Stereo signal input when receiving OH�=MONO, OL�=ST FM reception.
14SD/STI
Channel detection signal input when FM/AM seeking OH�=detect channel.
15LOC/DXOLOC/DX switching output when in the radio seek mode OH�=LOC, OL�=DX.
16IF REQOIF count signal request output
17NCNFM/AM power switch output OH�=AM, OL�=FM Not used. (Open)
18TU ONORadio power switch output OH�=Radio mode Not used. (Open)
19NCNNot used. (Open)
20E-VOL CEOCE output for volume level control
21ACC CONTNNot used. (Open)
22, 23KS4, KS3OInitial setting diode matrix output Not used. (Open)
24 � 26KS2 � KS0OInitial setting diode matrix output
27, 28K3, K2IInitial setting diode matrix input
29K1IInitial setting diode matrix input CD test mode, pulled down when not used.
30K0IInitial setting diode matrix input
31VDDNPower supply pin
32E-VOL CLOOClock output for volume level control
33LM SWOLoading or SLED GAIN switch output
34NCNNot used. (Open)
35FEM+ LM+OSled motor control terminal
36FEM� LM�OSled motor control terminal
37RWORW disc control output Normal set to OH�.
38LP UPORW disc control output Normal set to OL�.
39CD ONOCD power switch output
40A-MUTEOAudio mute signal output
41POWER CONTOPower control signal output
42ST-BY MUTEOST-BY mute signal output
43POWER MUTEOPower mute signal output
44BEEPOBEEP output (3 kHz, 50 ms)
45DFP INIFront panel detection signal input
46DRFIODetect RF� RF level detection input Pulled up when not used.
47WRQISub-code Q output standby input terminal
48RWCORead/write control output terminal
49CD RESODSP reset output terminal
50OPENNNot used. (Open)
51SW2I12 cm disc detection/12 cm disc ejection and detection
52SW1ILeading motor start detection
53R-ENCOD2IRotary encoder input 2
54R-ENCOD1IRotary encoder input 1
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ACEC
