Microcomputer's Terminal Description - Kenwood KDC-3024A Service Manual

KDC-3024A/G/YA/YG,307A/G/YA/YG

MICROCOMPUTER'S TERMINAL DESCRIPTION

SYSTEM MICROCOMPUTER uPD780058GC502 (X25 : IC1)
Pin No. Name
1 TDF DET
2 8EJE SW
3 NC
4 Avss
5 L-RST
6 L-CE
7 AVREF1
8 NC
9 IC10-DATA
10 IC10-CLK
11 L-DATAL
12 L-DATAS
13 L-CLK
14 R-DATA
15 R-QUAL
16 CH-DATAC
17 CH-DATAH
18 CH-CLK
19 CH-REQH
20 NC
21 AFS
22-24 NC
25 CH-CONT
26 TYPE REF
27 SD
28 NC
29 TYPE2
30 TYPE1
31 TYPE0
32 TUNER-TYPE1
33 Vss1
34 TUNER-TYPE0
35 MUTE
36 M-DATA
37 M-CLK
38 ADJ
39 P-MUTE
40 SVR
41 P-STBY
42 SW5V
4
I/O Description
I Panel detection
I
O Not used (out put L)
O LCD driver RESET
O LCD driver selection
Not used (connected to 9pin)
I/O IC10,E2PROM data communication
O IC10,E2PROM clock communication
I Data input from the LCD driver
O Data output to the LCD driver
O Clock output to the LCD driver
I Data input from the RDS
I Quality input from the RDS
I Data input from the changer (new 5L)
O Data output to the changer (new 5L)
I/O Clock input/output with the Changer (new 5L)
O Request output to the changer (new 5L)
O Not used (output L)
O Noise detection time constant switching terminal
O Not used (output L)
O Changer control
O 5V lines output for destination setting
I Tuner SD input
O Not used (output L)
I Destination type selection terminal 2
I Destination type selection terminal 1
I Destination type selection terminal 0
I Destination available/genuine model rool off
I Destination available/genuine model noise cancel H:genuine model 0 L:available model
O Mute (E.Vol,Preset) control
I/O Data input/output with the CD mechanism
O Clock output to the CD mechanism
O Tuner lines adjustment
O Power IC mute control
O Power IC servo control
O Power IC standby control
SW 5V control
O
Processing Operation
H:Panel detached L:Panel attached
H:Eject is completed
Except 8cm CD model:always output L
H:Panel detached L:RESET
∆3 normal H , Power off L
When 7seg model,output L
H:Select (panel communication)
When panel attached,output L
∆3 non communication : H
∆3 non communication : H
Non communication : H
When panel detached : L
∆3 Pull down on X25 unit,Pull up on X16 unit
When panel detached , output L
When panel detached , output L
Except RDS model : output L
Except RDS model : output L
Except changer model : output L
When non communication ,last data keeping
Except changer model : output L
Check the old and new
Except changer model : output L
L:Requset
Except changer model : output L
H:Normal L:FM/AM seek and AF search
∆3 (When tuner SRC auto zero , L)
H:Changer on L:Changer off
Except changer model : output L
H:During destination reading
H:Station detected
Refer to destination type list.
Refer to destination type list.
Refer to destination type list.
H:genuine model 1 L:available model
H:mute on L:mute off
Power off after that 15 second L
∆3 non communication : H
∆3 non communication : H
When adjustment = H
PS1-0,1=L PS1-2,2-0,1=Hi-z
IC10-DATA,CLK=Hi-z
H:mute off L:mute on
Power off after that 15 second H
H:When momentary power down detected
L:Nomal
H:Power IC ON L:Power IC OFF
H:SW5V OFF L:SW5V ON
Power off after that 10 second H