Microcomputer's Terminal Description - Kenwood KDC-7024/Y Service Manual

QQ
3 7 63 1515 0
Ref. No. Application/Function
Q55, 56 Pre-out mute SW
Q59, 60 Pre-out mute SW
Q63 E2P 5V SW
Q102, 103 AM+B SW
Q104 Composite signal buffer for RDS

MICROCOMPUTER'S TERMINAL DESCRIPTION

SYSTEM MICROCOMPUTER : UPD703030GC015 (X25-966 : IC1)
Pin No. Pin Name
1 PLL_DATA
2 AM+B
3 (FM+B)
4 V_ILL PAN_E2P DATA I/O
5 V_ILL PAN_E2P CLK I/O
TE
L 13942296513
6 EVDD
7 EVSS
8 AFS
9 BEEP
10 REMO
11 P_MUTE
12 (SVR)
13 IC2_SDA
14 IC2_CLK
15 P_STBY
16 P_CON
17 DIMMER_CONT
18 TEST
TYPE2
19
NC
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20 MUTE
21 PRE_MUTEL
.
22 PRE_MUTER
COMPONENTS DESCRIPTION
When a base gose Hi, Pre-out is muted.
When a base gose Hi, Pre-out is muted.
When Q63'base gose Lo, E2P 5V is out.
When Q102'base gose Hi, AM+B is out.
I/O Module Purpose / Description
I/O Tuner Data output/input with F/E.
I/O Power supply AM+B.
O Power supply FM+B (S01 F/E only).
To panel V-ILL D/A converter (V-ILL, LCD), E2PROM data.
To panel V-ILL D/A converter (V-ILL, LCD), E2PROM clock.
-
-
O Tuner Noise detection time constant switching.
O Audio Beep output.
I Extra Remote control input (Panel, External display).
O Audio Power IC MUTE output.
O Audio Power IC SVR discharge circuit control.
CD CD mechanism data line.
I/O Audio IC2 data line.
Extra ROM correction data line.
CD CD mechanism clock line.
I/O Audio IC2 clock line.
Extra ROM correction clock line.
O Audio Power IC STBY output.
I/O Extra Power control.
O To panel Dimmer control (W-LED only).
-
I Extra Destination select.
O Extra NC (MP3 mechanism model).
O Audio Mute output.
x ao
y
O Audio PREOUT (L ch) mute.
i
O Audio PREOUT (R ch) mute.
8
Operation/Condition/Compatibility
Truth table
Q Q
3 6 7 1 3
u163
.
KDC-7024/Y,722,8023
2 9 9 4 2 8
Processing Operation
AM operation : H
FM operation : H,
Last FM : H (With RDS, RBDS model)
1 5 0 5 8 2 9 9 4
FM seek, AF search : L, Receiving : H, Auto 0 : L
Power OFF : L, All OFF : L, TEL mute : L
Power OFF momentary power dropped
: H (5 second) and then L
Power IC ON : H, Power IC OFF : L, All OFF : H
Power ON : H, Power OFF : Hi-Z, All OFF : Hi-Z
Dimmer : Pulse control,
Frequency : 1kHz, Normally : H
Connect to GND.
w
w
Output : L m
ON : OPEN, OFF : L
co
M MUTE L is L : L (CD), Momentary power
dropped : L, 2 zone, NAVI interrupt : Fixed H
M MUTE R is L : L (CD), Momentary power
dropped : L, 2 zone, NAVI interrupt : Fixed H
9 9
2 8 9 9
5