Philips 221TE2LB/00 Service Manual page 115

Control board related:
(Symptoms: particular key not responding.)
All buttons are no
response
Board level analysis:
Check ADC0/1/2 voltage level.
Replace a new CTRL BD and test all
keys again.
Either white LED or red LED do not
work
Ensure FFC cable is well inserted
and check again
Replace a new CTRL BD and test all
LED again.
Repair Flow Chart
Y
Y
Y
Y
221TE2L LCD
1. Check FFC cable
N
connectivity.
2. Check PCB P/N to
ensure correct board is
used.
N
Assembly issue
115