Kenwood KDC 2024 SYA Service Manual

Page 5

KDC-2023, 2024A/SG/SYA/SYG, 2094YA/YG, ZZZ/3,3023
M ICROCOM PUTER'S TERMINAL DESCRIPTION

Pin No. Name I/O Description Processing Operation
43 B.U-DET | Back up detection terminal Hzpower down L:B.U. on
44 ACC-DET | ACC detection terminal HzACC OFF LzACC ON
45 PS1 _0 O POW?" SUPPIY '0 SW1 contra 0 BA4911 SW1 Power supply IC output
Audio 8V,P-CON PS1-2 PS1-1 PS1-0 Aev l P-CON l P-ANT
46 PS1-1 0 Power supply lC SW1 control 1 II: L(|l-l) H11) ON 51'8ny OFF
Audio 8V,P-CON |_ H H ON ON OFF
47 PS1-2 0 Power supply IC SW1 control 2 P-ANT H H H ON ON ON
48 PSZ-O 0 Power suPply '0 SW2 control 0 BA4911 sw2 Power supply IC output
lLL,FM,AM P6271 P8270 ILLUMI l FM | AM
L L lSTéNBY| OFF
_ Power supply lC SW2 control 1 H) (H ON
49 PS2 1 O lLL,FM,AM H H ON l OFF | ON
50 BEEP BEEP
HzLight on L:Light off
When panel attached,output L
51 DSI 0 DS' control When panel detachedjlashing at the panel (H/L)
FIX model is output L
52 NC 0 Not used (out put L)
53 NC 0 Not used (out put L)
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 HzEject L:Loading
57 M-STOP 0 Stop output to the CD mechanism HzPlay 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 Hzmute off Lzmute on
60 RESET Reset input from the System microcomputer
61 REMO l 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
. . , . HzNo disc
64 L08 SW | CD mechanism loading 5 SWItch detected L:DISK |N(Loading Stan)
Key input detected HzKey no input
65 KEY-REQ I (1 1 pin L connected to the DATA L) LzKey input (edge key data reading start)
66 12EJE SW | 12cm disc detected L2120m disc
67 VssO
68 VDD1
69 X2 A3 MAIN X'tal oscillating circuit A3 4.19MHz X'tal connection
70 X1 A3 MAIN X'tal oscillating circuit A3 4.19MH2 X'tal 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 A3
2.5V or greateerAVI MUTE
78 PHONE | 2way mute 1.0V or lesszTEL MUTE
Except phone mute model : output L
79 NC 0 Not used (out put L)
80 AVCONT 0 A/D converter standard voltage control output :éairltfigififwfifiqnégfir active