Kenwood KDC-W241AY Service Manual page 6

KDC-W241AY/W241GY/W3041A/W3041AY/W3041G
/W3041GY/W312A/W312AY/W312G/W312GY/W312SAY
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name
43 PON CD
44 CD LOEJ
45 CD MOTOR
46 VFD CE
47 CD DRIVEMUTE O
48 CD CCE
49 NC
50 CD MRST
51~53 NC
54 CD MUTE
55 CD DISC12 SW
56 ROTARY CCW
57 ROTARY CW
58~61 NC
62 VCC2
63 NC
64 VSS
65 NC
66 TUN IFC OUT
67 PON EXT GND I/O IC2 external input quick charge control
68 MUTE
69 ANALOG CON
70 LX RST
71 LX CON
72 LX MUTE
73 LX REQ M
74 NC
75 LX REQ S
76 PWIC SVR
77 PWIC STBY
78 PWIC MUTE
79 ACC DET
80 BU DET
81~83 NC
84 TUN SMETER
6
I/O Application
O CD mechanism power supply control
I/O CD motor control
I/O CD motor control
O VFD control request
Motor driver mute output
O CD mechanism chip enable
- Not used
O CD mechanism µ-com reset
- Not used
I CD mute request
I 12cm disc detection
I VOL key input
I VOL key input
- Not used
-
- Not used
-
- Not used
I Front-end IFC-OUT input
I/O Mute
O AUX/LX audio switching
O Forced reset to slave unit
O Start-up request to slave unit
I Mute request from slave unit
O Communication request to slave unit
- Not used
I Communication request from slave unit
O SVR discharging circuit
O Power IC standby control
O Power IC mute
I ACC power supply detection
I Detection of momentary power down
O Not used
I S-meter input
Truth Value
Processing Operation Description
Table
H: Power ON
q
Refer to the truth value table
q
Refer to the truth value table
H: Normal, L: Reset
Output L fi xed
L: Mute request
Pull-up (B.U.)
Detects pulse width
Detects pulse width
Output L fi xed
Output L fi xed
H: Station found, L: No station
L: OFF, Hi-Z: Quick charge, When IC2 is in source select:
Hi-Z, Mute L: L, Momentary power down/Power OFF: L
L: Mute OFF, Hi-Z: Mute ON
AUX: H (Switches after 100ms after fi rst-out mute
begins to work), LX/Other source: L
H: Reset, L: Normal
H: Slave unit ON, L: Slave unit OFF
H: Mute ON, L: Mute OFF
Pull-down (GND)
During 500ms after power OFF and momentary
power down: H, Since then: L
Power ON: H, Power OFF: L
STANDBY source/Momentary power down: L,
TEL mute: L
ACC found: L, No ACC: H
BU found: L, No BU/Momentary power down: H
(Operates after less than 4ms after momentary
power down is detected)
Output L fi xed