Components Description - Kenwood KDC-MP5043U Service Manual

KDC-MP242U/MP342U/MP443U
KDC-MP5043U/MP543U
● ELECTRIC UNIT (X34-623x-xx)
Ref. No. Application / Function
IC1 System μ-COM
IC2 E-VOL
IC4 Power Supply IC
IC6 Power IC
IC7 RDS IC
IC8 Reset IC
IC51 Switching Regulator
IC52 Hi-side SW
IC53 D+3.3V AVR IC
IC251 Level Shift (3.3V→5V)
IC252 Level Shift (5V→3.3V)
IC900 Sub μ-COM
IC950 i-Pod Authentication Coprocessor
Q2 Servo+B AVR
Q3 Control SW for Servo +B
Q7 FL+B SW
Q8 FL+B AVR
Q9 Control SW for FL+B
Q10 FL+B SW
Q11 14V SW
Q12 14V SW
Q13 Control SW for IC4
Q14 Control SW for IC4
Q51 Control SW for 16V SW
Q52 16V SW
Q53 FREQ CONT SW for IC51
Q101 ACC DET
Q102 Serge DET
Q103 BU DET
Q104,105 Mute Control
Q301 Panel 5V SW
Q701~704 Pre-out Mute SW
Q705 Mute Driver for Pre-out
Q902,903 3.3V AVR for IC900
Q905 CD "LOE_LIM_SW"_Buffer
4

COMPONENTS DESCRIPTION

Controls FM/AM tuner, the changer, CD mechanism, panel, volume and tone.
Controls the source, volume, tone.
Outputs 5V×2, 8.1V×2, 10.2V, P-CON, P-ANT.
Amplifi es the front L/R and the rear L/R to 50W maximum.
Decodes RDS.
Lo when detection voltage goes below 3.6V.
Power supply for D+5.1V. (to USB and Panel)
Detects USB Over Current.
Power supply for D+3.3V. (IC252,900,950)
Shifts level. (3.3V→5V)
Shifts level. (5V→3.3V)
Controls USB and CD mechanism.
Authenticates i-Pod.
When Q3's base goes Hi, AVR outputs 7.5V.
ON when the base goes Hi.
ON when the base goes Hi.
When Q9's base goes Hi, AVR outputs 10.5V.
ON when the base goes Hi.
ON when the base goes Lo.
ON when the base goes Hi.
ON when the base goes Lo.
ON when the base goes Hi.
ON when the base goes Lo.
ON when the base goes Hi.
When Q51's base goes Hi, AVR outputs BU voltage.
1.3MHz when the base goes Lo, 1.8MHz when the base goes Hi.
ON when the base goes Hi during ACC is applied.
When the base goes Hi, Surge voltage is detected.
ON when the base goes Hi during BU is applied.
ON when the base goes Hi.
ON when the base goes Lo.
When a base goes Hi, pre-out is muted.
ON when the base goes Lo.
When base of Q902 goes Hi, 3.3V is ON.
When the base goes Hi, loading ends.
Operation / Condition / Compatibility