Components Description - Kenwood DPX501 Service Manual

DPX501/501U/501UY
DPX-MP2090U
ELECTRIC UNIT (X34-415x-xx)
Ref. No.
System µ-COM
IC1
IC2 E-VOL
IC3 A8V REF Power Supply
IC4 Power IC
IC5 ILLUMI+B Power Supply
IC6 Muting Logic IC
IC7 Reset IC
IC8 Hi-side SW
IC9 RDS IC
IC10 Installer Memory IC
IC12 SW Regulator
IC13 FL+B Power Supply
Q1,2 B.U.5V AVR
Q3,11 SW5V
Q4,9 SW14V
Q5,6,10 AUDIO8V AVR
Q7,8 SERVO+B AVR
Q12,21 Serge Protect for IC12
Q13 PANEL5V
Q17 IC12 ON/OFF
Q101,102 P-ANT SW
Q103,106 P-CON SW
Q104,105 P-CON Protection
Q107 EXT-AMP-CON
Q108 Small Lamp DET SW
Q109 Serge DET
Q111 BU DET
Q112 ACC DET
Q113 Mute Driver
Q116 Pre-out Mute Driver
Q300,301 AM+B
Q302,303 Tuner8V
Q305,306 SW ILLUMI+B
Q400~403
Pre-out Mute SW
Q406,407
Q408 Pre-out Mute ON/OFF
4

COMPONENTS DESCRIPTION

Application / Function Operation / Condition / Compatibility
Controls FM/AM tuner, the changer, CD mechanism, panel, volume and tone.
Controls the source, volume, tone.
Outputs 1.27V.
Amplifies the front L/R and the rear L/R to 50W maximum.
Outputs 11.25V.
Controls logic for muting.
"Lo" when detection voltage goes below 3.6V or less.
Over current protection of USB power supply.
When pin 1 goes "Hi", USB5V is ON.
Decodes RDS.
Installer memory.
Supplies power for USB and CD mechanism.
Outputs 3.0V.
While BU is applied, BU5V AVR outputs +5V.
When Q11's base goes "Hi", SW5V outputs +5V.
When Q9's base goes "Hi", SW14V outputs 14V.
When Q10's base goes "Hi", A8V AVR outputs 8.0V.
When Q8's base goes "Hi", S+B AVR outputs 7.5V.
Outputs 20V when BU is over 20V.
When the base goes "Lo", PANEL5V outputs 5V.
When the base goes "Lo", IC12 is "ON".
When Q102's base goes "Hi", P-ANT SW outputs 14V.
When Q106's base goes "Hi", AVR outputs 14V.
Output protection is applied when P-CON output voltage fall is detected.
The 2 transistors protect Q103 false operation when P-CON SW is "ON".
When the base goes "Lo", Q107 is turned on.
When the base goes "Hi", Q108 is turned on.
When the base goes "Hi", IC4 is changed into standby source.
When the base goes "Hi", Q111 is turned on.
When the base goes "Hi", Q112 is turned on.
When the base goes "Hi", pre-out mute driver is turned on.
When the base goes "Lo", mute driver is turned on.
When Q301's base goes "Hi", AM+B is output.
When Q303's base goes "Hi", Tuner8V outputs 8V.
When Q306's base goes "Hi", SW ILLUMI+B outputs 11V.
When the base goes "Hi", pre-out is muted.
When the base goes "Lo", pre-out mute is "ON".