Truth Value Table; Cd Motor Control; Destination Switching - Kenwood KDC-138/138CR Service Manual

MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name I/O
86 TYPE2 I
87 PWIC DC DET I
88 LINE MUTE I
89 OFFSET DET I
90 PS2 2 O
91 PS2 1 O
92 PS1 1 O
93 PS1 2 O
94 PS1 3 O
95 NC -
96 AVSS -
97 REF CON O
98 VREF -
99 AVCC -
100 LX DATA S I

• Truth value table

q CD motor control
CD motor
Stop L
Load H
Eject H
Brake H
e Destination switching
TYPE 2 TYPE 1
(Pin 86) (Pin 85)
0V 0V
0V 2.4V
1.2V 0V
Application

Destination switching

DC offset detection
Line mute detection
Power IC offset detection
Power supply IC control
Power supply IC control
Power supply IC control
Power supply IC control
Power supply IC control
Not used
VREF control
Data from slave unit
CD loading/eject
L
L
H
Hi-z
Model
KDC-135
KDC-135CR
KDC-136
KDC-138/138CR/139/139S
Truth Value
Processing Operation Description
Table
e
Refer to the truth value table
If DC offset is found 20 times in 100ms with condition
of over 1.0V, it will be judged as DC offset detected.
TEL mute: Below 1V, NAVI mue: Over 2.5V
r
Refer to the truth value table
r
Refer to the truth value table
r
Refer to the truth value table
r
Refer to the truth value table
r
Refer to the truth value table
Output L fi xed
Connects to VREF
Pull-down (GND)
r Power supply IC (IC4) control
SEL1 (Pin 10)
PS1-2 PS1-3 PS2-1
L L L
L L H
H L H
H H H
SEL2 (Pin 11)
PS1-1 PS2-2 AUDIO/SW5
L L OFF
H L ON
H H ON
ILLUMI P-CON P-ANT
OFF OFF OFF
ON OFF OFF
ON ON OFF
ON ON ON
AM
OFF
OFF
ON
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