Kenwood KDC-3047M Service Manual page 5

MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name I/O
42~45 NC -
46 VFD CE O
47 ROTARY CCW I
48 ROTARY CW I
49 PON PANEL I/O Panel 5V control
50 PON FL O
51~59 NC -
60 RDS DATA I/O RDS decoder data input
61 RDS QUAL I
62 VCC2 -
63 NC -
64 VSS -
65 NC -
66 MUTE I/O Mute
67~73 NC -
74 RDS CLK I/O RDS decoder clock input
75,76 NC -
77 AUD SDA I/O E-VOL data input/output
78 AUD SCL I/O E-VOL data output
79 NC -
80 PWIC STBY O
81 TYPE1 I
82 TYPE2 I
83 TYPE3 -
84 NC -
85 AUD DC ERR I
86 CD SW1 I
87 PWIC DC ERR I
88 LINE MUTE I
89 BU DET I
90 ACC DET I
91 PWIC MUTE O
92 PS2 1 O
93 PS1 1 O
94 PS1 2 O
Application
Not used
VFD control request
VOL key input
VOL key input
Key illumination power supply control
Not used
RDS decoder qualifi cation input
Not used
Not used
Not used
Not used
Not used
Power IC standby control
Destination SW
Destination SW
Not used
Not used
DC offset detection
Disc insertion detection
Detection of power IC +B/GND short-
circuit
Line mute detection
Momentary power-down detection
ACC power supply detection
Power IC mute
Power supply IC control
Power supply IC control
Power supply IC control
KDC-3047M/MP1046/MP145/MP145CR/MP146/MP2046
/MP245/MP246AM/MP246G/MP246S/MP3046
Truth Value
Processing / Operation / Description
Table
Output L fi xed
Detects pulse width
Detects pulse width
ON: L, 11 minutes after momentary power-down or
panel detached or ACC OFF: Hi-Z
ON: H, OFF: L
Output L fi xed
Output L fi xed
Output L fi xed
L: Mute OFF, Hi-Z: Mute ON
Output L fi xed
Output L fi xed
Output L fi xed
POWER ON: H, POWER OFF: L
Output L fi xed
Output L fi xed
If DC offset is detected 20 times in 100ms with condi-
tion below 1.0V, it will be judged as DC offset is de-
tected.
L: Wrong connection
TEL mute: Below 1V, NAVI mute: Over 2.5V
BU found: L, No BU or momentary power-down: H
(Operates within 4ms after momentary power-down is
detected)
ACC found: L, No ACC: H
STANDBY source or momentary power-down: L,
TEL mute: L
w Refer to the truth value table
w Refer to the truth value table
w Refer to the truth value table
5