Ericsson A1018S - Page 22

A1018s/A1018sc Standard Electrical Repair
4/00021-2/FEA 209 544/16.B 22 (42)
Fig. 5.1
If:
1 - VLCD (~ 6.2 V) is incorrect, diode measure V608:1-3, V611:1-3 and V611:2-3
(fig. 5.2). Replace if faulty.
Measure the voltage at V611:1 (~3.8 V).
• If the voltage is missing, make sure N580 (fig. 5.2) is correctly soldered, if it is
replace N580.
* If the voltage is still missing, send the phone to the next repair level.
Measure the resistance between VLCD and ground.
• If it is <100 kOhm, replace C633 (fig. 5.2) and C673 (fig. 5.1).
Measure the voltage at D600:95 (~3.0 V) and D600:96 (~0.2 V).
• If any of the voltages are incorrect, measure the resistances of C634 and C636
(fig. 5.2) to make sure there isn´t a short circuit. Replace if faulty. If C634 and
C636 are correct, replace D600.
If the fault remains, send the phone to the next repair level.
2 - VDIG (~ 3.2 V) is incorrect, replace N701 (fig. 5.2). If that doesn´t work, send
the phone to the next repair level.