Kenwood CKDC-392V/VA Service Manual page 7

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MICROCOMPUTER'S TERMINAL DESCRIPTION
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Pin No. Name
54 LOE/LIM SW
55 MO SW
56 LO/EJ
57 M-STOP
58 M-RST
59 M-MUTE
60 RESET
61 REMO
62 R-CLK
63 CH-REQC
64 LOS SW
65 KEY-REQ
66 12EJE SW
TE
67 Vss0
L 13942296513
68 VDD1
69 X2
70 X1
71 IC
72 XT2
73 XT1
74 VDD0
75 AVREF0
76 S-METER
77 NOISE
78 PHONE
79 NC
80 AVCONT
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I/O Description
I CD mechanism down&limit detection
O CD mechanism loading motor control output
I/O CD mechanism loading/Eject switching terminal
O Stop output to the CD mechanism
O Reset output to the CD mechanism
I Mute input from the CD mechanism
Reset input from the System microcomputer
I Remote control input
I RDS clock input
I Request input from the changer (new 5L)
I CD mechanism loading's switch detected
Key input detected
I
(11pin L connected to the DATA L)
I 12cm disc detected
- GND
- VDD
- MAIN X'tal oscillating circuit
- MAIN X'tal oscillating circuit
- TEST
- Not used
-
- VDD
A/D converter reference voltage control output,
connection to the 80pin AVCONT
I S-meter input
I FM noise detection input
I 2 way mute
O Not used (out put L)
O A/D converter standard voltage control output
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H : Chucking detection, L : Normal
H : Loading, Eject, Break, L : Play
H : Eject, L : Loading
H : Play, L : Stop
H : Normal, L : CD mechanism reset
H : Mute off, L : Mute on
Except RDS model : Output L
H : Changer detection
L : Request
Except Changer model : Output L
H : No disc
L : Disk in (Loading Start)
H : Key no input
L : Key input (edge key data reading start)
L : 12cm disc
Q Q
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4.19MHz X'tal connection
4.19MHz X'tal connection
OPEN
Connected to VDD
2.5V or greater : NAVI MUTE
1.0V or less : TEL MUTE
Except phone mute model : Output L
H : During A/D converter active
same timing with PON
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CKDC-392V/VA/VD/VDA
CKDC-492V/VD
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Processing Operation
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