Components Description - Kenwood KDC-M7024 Service Manual

KDC-M7024/MP822
SUB-CIRCUIT UNIT (X16-2080-10)
Ref. No. Application/Function
IC1 E2PROM
SUB-CIRCUIT UNIT (X16-2140-10)
Ref. No. Application/Function
IC1 LCD driver
IC2 LCD driver
IC3 Remote control sensor
Q1 KEY scan start SW
Q5, D26 VLCD AVR
Q6 Remote control sensor power supply SW
Q11 Dimmer control
SWITCH UNIT (X16-2190-10)
Ref. No. Application/Function
Q1 DSI (Disabled System Indicator)
Q2 KEY illumination SW (GREEN)
Q3 KEY illumination SW (RED)
ELECTRIC UNIT (X25-966x-xx)
Ref. No. Application/Function
System µ-com
IC1
IC2 E-vol & N.C. & MPX
IC3 Regulator IC for A8V
IC4 Power IC
IC5 Swiching regulator IC for CD5V
IC7 Reset IC
IC8 Logic IC for muting
IC12 RDS decoder IC
IC13, 14 Motor driver IC for panel mechanism
IC15 ROM IC
Q1, 2 B.U.5V AVR
Q3 SW5V
Q4, 5 SW14V
Q6~8 AUDIO 8V AVR
Q9, 34 SERVO+B AVR
Q10 SW for IC5
Q11~14 ILL+B AVR
Q23, 24 P-ANT SW
Q25, 26 P-CON SW
Q27, 28 P-CON protection
Q29 Ex Amp control buffer
Q30 Small lamp det SW
Q32 BU det
Q33 ACC det
Q51, 52 Mute driver
4

COMPONENTS DESCRIPTION

For security
KEY Input
ON when the base goes "L".
ON when the base goes "L".
LCD back light control. OFF when the base goes "L", ON when the base goes "H".
DSI blinks when the base goes "H/L"
ON (KEY illumination green) when the base goes "H"
ON (KEY illumination red) when the base goes "H"
For ROM correction.
While BU is applied, BU5V AVR outputs +5V.
When Q3'base goes Lo, SW5V outputs +5V.
When Q5'base goes Hi, SW14V outputs 14V.
When Q6'base goes Hi, A8V AVR outputs 8.4V.
When Q34'base goes Hi, S+B AVR outputs 7.4V.
When Q10'base gose Hi, Q10 is turned on.
When Q11'base goes Hi, AVR outputs 10.5V.
When Q23'base goes Hi, P-ANT SW outputs 14V.
When Q26'base goes Hi, P-CON SW outputs 14V.
Protect Q27 by turning on when P-CON output is grounded.
When Q30'base goes Hi, Q30 is turned on.
When Q32'base gose Hi, Q32 is turned on.
When Q33'base gose Hi, Q33 is turned on.
When a base gose Lo, mute driver is turned on.
Operation/Condition/Compatibility
Operation/Condition/Compatibility
Operation/Condition/Compatibility
Operation/Condition/Compatibility