A1018s/A1018sc Standard Electrical Repair
4/00021-2/FEA 209 544/16.B 31 (42)
If the resistance is correct, replace D600
8.3 Some keys (not a complete row/column)
are faulty.
Make sure the soldering at D600:1,120-128 are correct.
If the soldering is correct there is a foil damage and the board has to be discarded.
To verify it, measure the resistance between the faulty pad and a working pad in the
same row/column (should be ~0 Ohm). The foil damage is usually caused bye a liq-
uid damage.
For example: The keys 5 & 6 doesn´t work. Measure the resistance between the
“row-side” of key pad 4 and the “row-side” of the key pad 5 to verify a foil damage
(should be ~0 Ohm).
Fig. 8.4
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