Kenwood KDC-8024 Service Manual page 7

MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name I/O
57 SC_CON O
58 M_RST O
59 M_STOP O
60 CD_SW3 I
61 LO/EJ I/O
62 MOSW O
63 FPM MOTOR B O
64 FPM MOTOR F O
65 FPM MOTOR O O
66 FPM MOTOR C O
67 O_DATA I/O
68 O_CLK I/O
69 O_CE I/O
70 M_MUTER I
71 AVDD -
72 AVSS -
73 AVREF -
74 M_MUTEL I
75 PAN_DET I
76 PHONE I
77 FPM SW4 I
78 FPM SW1 I
79 FPM SW2 I
80 FPM SW3 I
81 FPM PHOUT I
82 S_METER I
83 NOISE I
84 IFC_OUT I
85 NC (POWER_DET) I
86 NC O
87 R_CLK I
88 LX_REQ_S I
89 SC_REQ I
90 CD_SW1 I
91 CD_SW2 I
92 R_QUAL I
93 R_DATA I
94 LX_DATA_S I
95 LX_DATA_M O
96 LX_CLK I/O
97 PAN_RX I
Module Purpose / Description
Panel µ-com control.
To panel
CD Reset output to CD mechanism.
CD Stop request to CD mechanism.
CD DC down switch detection.
CD CD mechanism loading/eject switch.
CD CD mechanism motor driver switch.
P-mecha FPM mechanism (Slider) control.
P-mecha FPM mechanism (Slider) control.
P-mecha FPM mechanism (Angle) control.
P-mecha FPM mechanism (Angle) control.
Extra External display data input/output.
Extra External display clock input/output.
Extra External display chip enable input/output.
CD Mute request form CD mechanism. (R ch).
Connect to P_ON (29 pin).
CD Mute request form CD mechanism. (L ch).
To panel Panel E2PROM detection.
Extra PHONE detection.
FPM mechanism position detection,
P-mecha
mechanism detection.
P-mecha FPM mechanism position detection.
P-mecha FPM mechanism position detection.
P-mecha FPM mechanism position detection.
P-mecha FPM mechanism position detection.
Tuner S-meter detection.
Tuner FM noise detection.
Tuner F/E IFC OUT input.
Extra Power IC DC offset detection.
NC (Except J type)
Tuner RDS decoder clock input.
LX Receive request from external slave.
Communication request from panel µ-com
To panel
CD Loading switch detection.
CD 12cm disc detection switch.
Tuner RDS decoder QUAL input.
Tuner RDS decoder data input.
LX Data input from external slave.
LX Data output to external slave.
LX Clock input/output with external slave.
Data input from panel µ-com
To panel
KDC-8024
Truth table Processing Operation
Power OFF, ACC OFF : L
Normally : H, Reset : L (Per mechanism control)
Stop : L, CD : H
Chucking : H
Stop, brake : Hi-Z, Loading : L, Eject : H
Loading, eject, brake : H
e
e
e
e
External display
External display
External display
ON : L (CD)
ON : L (CD)
With : L, Without : H
TEL mute : 1V or less, NAVI mute : 2.5V or more,
J type 1V or less, 2.5V or more : NAVI mute
3.75V or more : No mechanism,
e
1.25V or more : H, Less than 1.25V : L
e
e
e
e
H : 2.2V or more
Refer to S03 F/E control.
Refer to S03 F/E control.
With station : 2.5V or more, refer to S03 F/E control.
03 model not used. Connect to GND.
Output : L
Request : L
Loading start power off : L
12cm disc power off : L
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