Kenwood KDC 3027 A Service Manual

Page 7

KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY
KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G

MICROCOMPUTERS TERMINAL DESCRIPTION

Pin No. Name l/O Description Processing Operation
54 LOE/LIM SW | CD mechanism down&limit detection H :Chucking detection, L : Normal
55 MO SW 0 CD mechanism loading motor control output H : Loading, Eject, Break, L : Play
56 LO/EJ l/O CD mechanism loading/Eject switching terminal H : Eject, L : Loading
57 M-STOP 0 Stop output to the CD mechanism H : Play, L : Stop
58 M-RST 0 Reset output to the CD mechanism H : Normal, L : CD mechanism reset
59 M-MUTE l Mute input from the CD mechanism H : Mute off, L : Mute on
60 RESET Reset input from the System microcomputer
61 REMO | Remote control input
62 R-CLK l RDS clock input Except RDS model : Output L

H : Changer detection
63 CH-REQC | Request input from the changer (new 5L) L : Request
Except Changer model : Output L
H : No disc
64 LOS SW | CD mechanism loading's switch detected
L : Disk in (Loading Start)
Key input detected H :Key no input
65 KEY-REQ |
(t 1 pin L connected to the DATA L) L : Key input (edge key data reading start)
66 12EJE SW l 12cm disc detected L : 12cm disc
67 Vsso
68 VDD1
69 X2 MAIN Xtal oscillating circuit 4.19MHZ Xtal connection
70 X1 MAIN X'tal oscillating circuit 4.19MHZ Xtal connection
71 IC TEST
72 XT2 Not used OPEN
73 XT1
74 VDDO VDD Connected to VDD
A/D converter reference voltage control output,
75 AVREFO
connection to the 80pin AVCONT
76 S-METER l S-meter input
77 NOISE l FM noise detection input
2.5V or greater : NAVI MUTE
78 PHONE | 2 way mute 1.0V or less :TEL MUTE
Except phone mute model :Output L
79 NC 0 Not used (out put L)
H : During A/D converter active
80 AVCONT 0 A/D converter standard voltage control output
same timing with PON