Components Description - Kenwood FGZ000UF2 Service Manual

SYNTHESIZER UNIT (X14-9490-10)
Ref. No. Application / Function
IC1 Reset IC
IC7 E2PROM
IC8 CAN transceiver
IC9 Reset IC
IC10 Ope amp
IC16 Buffer
IC17 BUS transceiver
IC18 Regulator
IC20 DC/DC controller
IC21 Reset IC
System µ-com
IC22
IC23 Buffer
IC800 Isolation amplifier
Q1,17,50,74 Audio mute
Q2,32,34~37,
DC/DC controller power supply
Q39,41,46,53
Q4,31,57,61 Constant voltage power supply
Key Illumination light adjustment
Q5
detection
Q6 Temperature detection SW
Q8~11,55,56,58 Video setting detection SW
Q12,15,18 Audio control SW
Q14,47 Constant voltage power supply
Power supply momentary power
Q24
down detection
Q26,28 Voltage detection
Q27,29,30,64 Constant voltage power supply
Q33 Over current detection
Q38 Over current detection
Q40,42 DC/DC switching
Q43,49 DC/DC switching
Q44 Over current detection
Q48 Over current detection
Q62 Rear camera control SW
Q66~69 Watchdog timer

COMPONENTS DESCRIPTION

Backup 5V voltage monitoring. Resetting system µ-com at B.U OFF.
Memory for reception TV station and touch panel compensation.
Communication with vehicle unit.
Detects 5V power supply ON.
Bias power supply for internal audio circuit.
Mixing L/Rch of NAVI sound.
Protects µ-com from communication line of the NAVI unit.
Communication with the audio unit.
5V power supply for system µ-com.
Power supply in general (Other than system µ-com, key Illumination).
Resetting abnormalities of the system µ-com.
Controlling CAN communication and graphic µ-com.
Setting video source, screen zooming and brightness.
Communication with audio & NAVI units.
Monitoring internal power supply and abnormalities power supply and temperature.
Audio unit control. Writing to µ-com.
Removing noise from NAVI unit.
Mute ON at power supply ON/OFF.
When ACC is ON, IC20 power supply is turned ON.
IC20 power supply is turned OFF, when over current detected with DC/DC output.
When Q61 is ON, outputs +18.5V.
ON when illumination PWM is input.
When ACC ON, goes ON and starts temperature detection.
ON/OFF according to screen mode and adjustment.
When audio communication ON, Q18 is ON, when OFF, Q15 is ON.
-15.5V constant voltage power supply.
OFF at backup power supply momentary power down.
When Q26 is ON, backup power supply voltage detection.
Backup 5V power supply regulator.
When detecting 18.5V over current, controller power supply OFF.
When detecting 7.5V over current, controller power supply OFF.
Switching of primary-side of transformer.
5V power supply switching.
When detecting -15.5V over current, controller power supply OFF.
When detecting 5V over current, controller power supply OFF.
ON at adjustment of rear camera and marker.
Q67 is OFF at system µ-com run off.
FGZ000UF2
Operation / Condition / Compatibility
3