Kenwood DNX4280BT Service Manual

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Contents

4DNX4280BT/5180/5280BT/5380/5380M/5380BT/5580BT/6040EX/6180/6480BT/6980COMPONENTS DESCRIPTION● VIDEO CONTROL UNIT (X15-154x-xx)Ref. No. Application / Function Operation / Condition / CompatibilityIC1 DCDC controller IC 6.5V/1.5V DCDC converterIC2 DCDC converter IC D5V/V5V/V5V_DVD DCDC converterIC3 DCDC converter IC BU3.3V DCDC converterIC4 Regulator BU1.8V Regulator ICIC5 Regulator SW1.8V Regulator ICIC6 Regulator D1.2V Regulator ICIC7 Regulator NAND3.3V Regulator ICIC8 Regulator SW1.8V_DA Regulator ICIC9 Regulator P5V/FAN5V Regulator ICIC200 Analogue IC VIDEO ISO, AMP for iPodIC201 Regulator BU3.3V_SYS Regulator ICIC202 AND Logic IC TV_SDATA BufferIC203 Voltage detect IC Reset signal generate at 3.0VIC204 EEPROM EEPROM 1KbIC205 MCU IC System control ICIC206 AND Logic IC Video Mute controlIC207 Analogue IC VIDEO ISO, AMP for AVINIC400 OP-AMP X 2 For BT Audio LPFIC401 Regulator BT3.3V Regulator ICIC402 Regulator A5V Regulator ICIC403 Regulator USB5V Regulator ICIC404 Audio DA convertor Audio DAC for NAVI voiceIC405 Audio DA convertor Audio DAC for USB audioIC406 Video SW 8IN 5OUT Composite signal selectorIC408 Voltage detect IC USB5V over current detectIC409 3state Buffer x2 IC BT control signal bufferIC410 EXOR Logic IC BT control signal bufferQ1~3 SW SW14V controlQ4 LOAD SW FET SW14V ON/OFFQ5 BU voltage detect (Hi-side) BU_DET signal controlQ6,7 SW BU_DET signal controlQ8 BU voltage detect (Low-side) BU_DET signal controlQ9~13 SW BU_DET signal controlQ14,15 SW DET_MUTE signal generationQ16 SW IC3 Forced PWM controlQ17 FET DCDC SW FET D1.5VQ18 FET DCDC SW FET 6.5VQ19 LOAD SW G3.3V ON/OFFQ20 SW Q19 controlQ21 LOAD SW D3.3V ON/OFFQ22 SW Q21 controlQ23 LOAD SW D3.3V_DVD ON/OFF