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KDC-MP4036U/MP435U/X491/W4537UA/W4537UAY
/W4537UG/W4537UGY/W4737U/W4737UY
● ELECTRIC UNIT (X34-466x-xx)
Ref. No.
Application / Function
IC1
SW REG
IC2
A8V REF Power Supply
IC100
Reset IC
IC102
System µ-COM
IC103
Muting Logic IC
IC200
Hi-side SW
IC300
E-VOL
IC301
OP-AMP
IC400
Power IC
IC500
RDS Decoder
IC700
D/A Converter.
IC702
iPod Authentication Coprocessor
IC703
Digital Audio Receiver
IC704
OP-AMP
IC705
Point REG
IC708
DC Voltage REG
IC709,710
Inverted 3-state Output
IC711
SOC (System On Chip)
IC712
Quad 2-input AND Gate
IC714
SDRAM
IC715
NOR Flash ROM
IC716
LDO REG
Q1,2,16
A8V AVR
Q3,4
BU5V AVR
Q5,7
Servo+B AVR
Q6,17,20,21
SW14V
Q8,9
Serge Protect for IC1
Q10,11,12,18
ILL+B AVR
Q13,14
SW5V
Q15
PAN5V
Q50,58
P-CON SW
Q51
BU DET
Q52,54
P-CON Protection
Q53,56
P-ANT SW
Q57
ACC DET
Q59
Serge DET
Q60
Small Lamp DET SW
Q200
DSI
4
COMPONENTS DESCRIPTION
Outputs 5.0V. Power supply for D5V, FL+B and USB5V.
Outputs 1.27V.
Lo when detection voltage goes below 3.6V.
Controls FM/AM tuner, the changer, CD mechanism, USB, panel, volume and tone.
Controls logic for muting.
Overcurrent protection of USB power supply.
When pin1 goes Hi, USB5V is ON.
Controls the source, volume and tone.
Reference supply for 4V pre-out.
Amplifi es the front L/R and the rear L/R to 50W maximum.
Decodes RDS signal.
For CD and USB source.
For iPod authentication.
For CD source.
L.P.F.
Outputs 5.0V. Power supply for D/A converter.
Outputs 3.3V. Power supply for 3.3V.
Converts 3.3V to 5V.
Decodes MP3 or other fi les of audio/decompression standards by software based
architecture.
Convert 5V to 3.3V.
SDRAM for SOC.
NOR fl ash ROM for SOC.
Outputs 1.8V. Power supply for SOC.
When Q16's base goes Hi, A8V AVR outputs 8.0V.
While BU is applied, BU5V AVR outputs +5V.
When Q7's base goes Hi, Servo+B AVR outputs 7.5V.
When Q17's (or Q21's) base goes Hi,SW14V outputs 14V.
Output 20V when BU is over 20V.
When Q18's base goes Hi, ILL+B outputs 10.5V.
When Q14's base goes Hi, SW5V outputs +5V.
When the base goes Lo, PAN5V outputs 5V.
When Q50's base goes Hi, AVR outputs 14V.
When the base goes Hi, Q51 is turned on.
When P.CON output voltage decrease is detected, output protection is made.
When P.CON SW is ON, malfunction of Q58 is protected.
When Q53's base goes Hi, P-ANT SW outputs 14V.
When the base goes Hi, Q57 is turned on.
When the base goes Hi, BU DET is turned off.
When the base goes Hi, Q60 is turned on.
When the base goes Hi, security indicator lights.
Operation / Condition / Compatibility
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