KDC-X879
5
Ref No. Application / Functions Operation / Condition / Compatibility
IC5 System IC For System E’s control
IC6 Audio control IC ForWOW/FOCUS control
IC7 Power supply IC -9V AVR (For 4.5V Pre-out)
IC8 Reset IC When BU5V line voltage is less than 3.5V, this IC output line is “L”
IC9 Muting logic IC Control for MUTE, P-ANT & RESET muting
IC10 Buffer IC For spectrum analyzer
IC11~13 OP AMP For 4.5V Pre-out
IC14 RDS decoder Decode for RDS signal
IC15,16 Motor driver Control for Panel mechanism motor
IC18 P-CON IC Power control IC
IC19 Power supply IC Switching regulator IC for CD4.7V
IC20 Analog SW Control forWOW/FOCUS IC (IC4)
Q1,2 BU 5V AVR While BU is applied when BU5V regulator output is +5V
Q3,601 SW5V AVR When Q601base level goes H, SW5V regulator output is +5V
Q4,5 SW14V AVR When Q5 base level goes H, SW14V regulator output is +14V
Q6~8 Audio 8V AVR When Q6 base level goes H, A8V regulator output is +8.3V
Q9,602 Servo +B AVR When Q602 base level goes H, S+B regulator output is +7.5V
Q11~14 Illumination & DC/DC +B AVR When Q11 base level goes H, AVR output is +9.2V
Q15,16 Audio 10.5V AVR When Q16 base level goes H, AVR output is +10.5V
Q17~19 Pre Amp & -9V AVR Q18,19 work as differential amplifier, Q17 wark as driver and -9.1V is supplied to
OP AMP for Pre-out
Q20~22 Pre Amp & +9V AVR Q20,22 work as differential amplifier, Q21 wark as driver and +9.4V is supplied to
OP AMP for Pre-out
Q23,24 P-ANT SW When Q23 base level goes H, P-ANT SW output is +14V
Q25 Buffer EX amp control buffer
Q26 Small lamp det. SW When Q26 base level goes H, Q26 turned ON
Q27 BU detector When Q27 base level goes H, Q27 turned ON
Q29 ACC detector When Q29 base level goes H, Q29 turned ON
Q30,31 Muting driver When base level goes L, muting driver is turned ON
Q201 Buffer Noise detect buffer amp
Q202 E-VOL muting SW When Q202 base level goes H, muting SW is turned ON
Q203~208
Pre-out muting SW When base level goes H, Pre-output is muted
Q210 AGC For AGC for spectrum analyzer
Q303,304 AM +B SW When Q303 base level goes H, AM +B is out to tuner unit
Q305 Buffer Composite signal buffer for RDS
Q501 E2P 5V SW When Q501 base level goes L, E2P 5V is out for E2PROM
Q502,503 Panel 5V SW When Q503 base level goes H, Panel 5V is out
Q603 SW When Q603 base level goes H, Q603 is turned ON
COMPONENTS DESCRIPTION
