KDC-X769
5
Ref. No.
Application/Function
Operation/Condition/Compatibility
Q27, 28
P-CON protection
Protect Q27 by turning on when P-CON output is grounded.
Q29
Ex Amp control buffer
Q30
Small lamp det SW
When Q30’base goes Hi, Q30 is turned on.
Q32
BU det
When Q32’base gose Hi, Q32 is turned on.
Q33
ACC det
When Q33’base gose Hi, Q33 is turned on.
Q51, 52
Mute driver
When a base gose Lo, mute driver is turned on.
Q53
Noise buffer
Q54
E-vol mute SW
When a base gose Hi, mute SW is turned on.
Q55~60
Pre-out mute SW
When a base gose Hi, Pre-out is muted.
Q63
E2P 5V SW
When Q63’base gose Lo, E2P 5V is out.
Q102, 103
AM+B SW
When Q102’base gose Hi, AM+B is out.
COMPONENTS DESCRIPTION
MICROCOMPUTER’S TERMINAL DESCRIPTION
●
SYSTEM MICROCOMPUTER : UPD703030GC015 (X25-968 : IC1)
Pin No.
Pin Name
I/O
Module
Purpose / Description
Truth table
Processing Operation
1
PLL_DATA
I/O
Tuner
Data output/input with F/E.
2
AM+B
I/O
Power supply
AM+B.
AM operation : H
3
(FM+B)
O
Power supply
FM+B (S01 F/E only).
FM operation : H,
Last FM : H (With RDS, RBDS model)
4
V_ILL PAN_E2P DATA I/O
To panel
V-ILL D/A converter (V-ILL, LCD), E2PROM data.
5
V_ILL PAN_E2P CLK
I/O
To panel
V-ILL D/A converter (V-ILL, LCD), E2PROM clock.
6
EVDD
-
7
EVSS
-
8
AFS
O
Tuner
Noise detection time constant switching.
FM seek, AF search : L, Receiving : H, Auto 0 : L
Beep output.
Extra
Remote control input (Panel, External display).
Power IC MUTE output.
Power OFF : L, All OFF : L, TEL mute : L
Power IC SVR discharge circuit control.
Power OFF momentary power dropped
: H (5 second) and then L
CD mechanism data line.
IC2 data line.
Extra
ROM correction data line.
CD mechanism clock line.
14
IC2_CLK
I/O
Audio
IC2 clock line.
Extra
ROM correction clock line.
15
P_STBY
O
Audio
Power IC STBY output.
Power IC ON : H, Power IC OFF : L, All OFF : H
16
P_CON
I/O
Extra
Power control.
Power ON : H, Power OFF : Hi-Z, All OFF : Hi-Z
17
DIMMER_CONT
O
To panel
Dimmer control (W-LED only).
Dimmer : Pulse control,
Frequency : 1kHz, Normally : H
18
TEST
-
Connect to GND.
19
TYPE2
I
Extra
Destination select.
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