Touchscreen failure
Yes
Test again and
re-debug the environment. Does
the failure recur?
Is there
any cosmetic defect (such as
cracks)?
No
Is the BTB
connector fastened
properly?
Yes
Perform cross
verification. Is the PCBA
defective?
No
Replace the touchscreen and ask the
MQE to analyze the cause
No
NTF
Report to the TE for
cause analysis
Yes
The PQE re-checks
and organizes an
analysis
Replace the
touchscreen
No
The PQE analyzes
the cause to prevent
assembly risks
Re-assemble the
touchscreen
Yes
Check the
appearance. Use an X-ray
machine to check the PCBA. Are
there any soldering issues on the PCBA,
especially on the BTB
connectors?
Yes
The PCBA process
engineers analyze the
cause
Repair the area with
soldering issues
Is the
touchscreen Vout4 power
normal (C1027)?
Yes
Are the
touchscreen interrupt
and reset signals normal
(R1722、R1726)?
No
Are components on the
circuit normal?
Yes
If there are no soldering issues,
replace U300
No
If there are no soldering issues,
replace defective components
No
Yes
Are the
pull-up resistor and
components on the circuit
normal?
Yes
Is the SPI signal normal
(R1711~R1714)?
No
Yes
No
If there are no soldering
issues, replace U1000
Yes
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