Harman Kardon AURA STUDIO Service Manual ▷ View online
Trouble shooting Chart
5-1
Touch keys do not work
Touch keys do not
work
Go
No
Replace the old with the new touch
board to the EUT working.
Yes
Replace the touchpad.
No
Yes
Check from main board the STB_3V3
power supply is normal?
Check 5pin cable(XP5) to main board of
connect yes or not.
connect yes or not.
Instead of new 5pin line
Fix or replace the key board
Check I2C signal from MCU for main
board.
Yes
No
Check the main board STB_3V3 have
shorted to ground?
No
Yes
Check power board the
STB_3V3 power
supply
.
Replace U101 with new G9091 for power
Replace PCBA foe main board.
Check the main board the STB_3V3
other supply network load parts (for
example:BT).
No
Replace the BT part or other load parts
for STB_3V3.
Yes
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