Kenwood KDC-W4044UA Service Manual page 8

KDC-W4044UA/W4044UAY/W4044UG/W4044UGY
KDC-W413UA/W413UAY/W4544U/W4644UY
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name
78 MUTE
79 BU DET
80 ACC DET
81 TYPE1
82 TYPE2
83 PWIC DC ERR
84 LINE MUTE
85 NC
86 FSEL
87 PON SWREG
88,89 NC
90 PS2 2
91 PS2 1
92 PS1 1
93 PS1 2
94 PS1 3
95 NC
96 AVSS
97 REF CON
98 VREF
99 AVCC
100 LX DATA S
• Truth value table
q CD motor control
CD motor
Stop
Load
Eject
Brake
8
I/O Application
I/O Mute
I Momentary power-down detection
I ACC power supply detection
I Destination SW
I Destination SW
Detects whether power IC was short-circuited
I
to +B or GND
I Line mute detection
- Not used
O Frequency SW for switching regulator
O ON/OFF for switching regulator
- Not used
O Power supply IC control
O Power supply IC control
O Power supply IC control
O Power supply IC control
O Power supply IC control
- Not used
-
O VREF control
-
-
I Data from slave unit
CD loading/eject
L L
H L
H H
H Hi-z
Truth Value
Processing Operation Description
Table
L: Mute OFF, Hi-Z: Mute ON
BU detected: L,
No BU or momentary power-down: H
(Operates below 4ms after momentary power-down
is detected)
ACC detected: L, No ACC: H
TEL mute: Below 1V, NAVI mute: Over 2.5V
Output L fi xed
H: 1.3MHz, L: 1.8MHz
H: ON, L: OFF
Output L fi xed
w Refer to the truth value table
Refer to the truth value table
w
w Refer to the truth value table
w Refer to the truth value table
Refer to the truth value table
w
Output L fi xed
Connects to VREF
w 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