FGZ000UF2
3
COMPONENTS DESCRIPTION
●
SYNTHESIZER UNIT (X14-9490-10)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
Reset IC
Backup 5V voltage monitoring. Resetting system
µ
-com at B.U OFF.
IC7
E2PROM
Memory for reception TV station and touch panel compensation.
IC8
CAN transceiver
Communication with vehicle unit.
IC9
Reset IC
Detects 5V power supply ON.
IC10
Ope amp
Bias power supply for internal audio circuit.
Mixing L/Rch of NAVI sound.
IC16
Buffer
Protects
µ
-com from communication line of the NAVI unit.
IC17
BUS transceiver
Communication with the audio unit.
IC18
Regulator
5V power supply for system
µ
-com.
IC20
DC/DC controller
Power supply in general (Other than system
µ
-com, key Illumination).
IC21
Reset IC
Resetting abnormalities of the system
µ
-com.
Controlling CAN communication and graphic
µ
-com.
IC22
System
µ
-com
Setting video source, screen zooming and brightness.
Communication with audio & NAVI units.
Monitoring internal power supply and abnormalities power supply and temperature.
IC23
Buffer
Audio unit control. Writing to
µ
-com.
IC800
Isolation amplifier
Removing noise from NAVI unit.
Q1,17,50,74
Audio mute
Mute ON at power supply ON/OFF.
Q2,32,34~37,
DC/DC controller power supply
When ACC is ON, IC20 power supply is turned ON.
Q39,41,46,53
IC20 power supply is turned OFF, when over current detected with DC/DC output.
Q4,31,57,61
Constant voltage power supply
When Q61 is ON, o18.5V.
Q5
Key Illumination light adjustment
ON when illumination PWM is input.
detection
Q6
Temperature detection SW
When ACC ON, goes ON and starts temperature detection.
Q8~11,55,56,58
Video setting detection SW
ON/OFF according to screen mode and adjustment.
Q12,15,18
Audio control SW
When audio communication ON, Q18 is ON, when OFF, Q15 is ON.
Q14,47
Constant voltage power supply
-15.5V constant voltage power supply.
Q24
Power supply momentary power
OFF at backup power supply momentary power down.
down detection
Q26,28
Voltage detection
When Q26 is ON, backup power supply voltage detection.
Q27,29,30,64
Constant voltage power supply
Backup 5V power supply regulator.
Q33
Over current detection
When detecting 18.5V over current, controller power supply OFF.
Q38
Over current detection
When detecting 7.5V over current, controller power supply OFF.
Q40,42
DC/DC switching
Switching of primary-side of transformer.
Q43,49
DC/DC switching
5V power supply switching.
Q44
Over current detection
When detecting -15.5V over current, controller power supply OFF.
Q48
Over current detection
When detecting 5V over current, controller power supply OFF.
Q62
Rear camera control SW
ON at adjustment of rear camera and marker.
Q66~69
Watchdog timer
Q67 is OFF at system
µ
-com run off.