Kenwood FZDA07ELEF2 Service Manual page 10

FZDA07ELEF2/EREF2/MRHF2
● SWITCH UNIT (X34-405x-xx) (H/C)
Ref. No.
IC1 Heater control panel µ-com
IC2 Reset IC
IC3 E2PROM
Q1 UART+
Q2 UART-
Q3 Power switch
Q4 Power switch
Q5 ILL- signal detection
Q7 ACC voltage detection
Q11 Illumination LED control switch
Q12 Illumination LED control switch
Q13 Illumination LED control switch
● ELECTRIC UNIT (X34-485x-xx)
Ref. No.
IC2 Video switching SW for navigation
IC4 CAN driver
IC6 BUS driver for ETC communication (Only for J-type)
IC7 System µ-com
IC201 TV8V power supply IC
IC261 DVD_A5V power supply IC
IC281 N_A5V power supply IC
IC300 Amplifi er for sound recognition microphone
IC304 6dB video amplifi er for navigation video and RSE video 75Ω drive, P-ON5V drive
IC305 BUS-driver for TMC communication
IC307 Buffer for audio reference voltage
IC310 BU5V power supply monitor
E2PROM (P-ON period of time, TILT correction value,
IC313
number of DVD_EJECT)
IC314 Video switching SW for RSE output
IC315 For SECURITY communication level conversion
IC321 N_BU3.3V power supply IC
IC361 REAR6V power supply IC
IC501 P-ON5V and P-ON3.3V generation switching regulator (250k~550kHz), 3.3V: 5A, 5V: 5A, BU drive
IC601 P-ON8V generation switching regulator
IC603 Buffer for DC/DC CLK and navigation CLK
IC605 Watch dog monitor
IC606 Buffer for SPDIF
10
COMPONENTS DESCRIPTION
Application / Function
Application / Function
Operation / Condition / Compatibility
Vehicle ECU, communication with audio-side µ-com, key import, display
data transmission, illumination control
When µ-com power supply voltage is 4.2V or less, reset the µ-com.
Stores ROM correction data
Interface for UART communication (transmission) with vehicle.
Interface for UART communication (reception) with vehicle.
ON/OFF VH voltage application of VFD.
ON/OFF Q3 by taking IGN_DET and DD_ON logic.
Transmit ILL- signal from vehicle to µ-com and Q13.
Detects ACC voltage from the vehicle.
Controls ON/OFF and the luminance of LED for front DEF.
Controls ON/OFF and the luminance of LED for rear DEF.
Controls ON/OFF and the luminance of LED for key illumination.
Operation / Condition / Compatibility
P-ON5V drive
P-ON5V drive for CAN-BUS communication with the vehicle
P-ON5V drive
Pins from #1~#47 and from #123~#144 are 5V-driven and pins from
#48~#122 are 3.3V-driven
Input: SW_BU, Output when TV5V is ON
Input: SW8V, Output when SW8V is being applied
Input: SW8V, Output when SW8V is being applied
P-ON8V drive
P-ON5V drive
4V output, P-ON8V drive
Output Lo (Reset) when BU5V is less than 4.3V
1kbit, I2C-BUS, BU5V drive
P-ON5V drive
P-ON3.3V drive
Input: N_BTT, Output when N_BTT is being applied
Input: SW8V, Output when SW8V is being applied
250kHz, 8V: 2.2A, BU drive
P-ON3.3V drive
Output Lo (Reset) when the smoothed voltage of the watch dog pulse is
2.5V or less
P-ON3.3V drive