A1018s/A1018sc Standard Electrical Repair
4/00021-2/FEA 209 544/16.B 5 (42)
2 No serv / not able to connect calls.
2.1 Type of fault.
Connect the phone to a GSM test instrument and try to get serv at –68.5 dBm input
signal, check both bands (GSM 900 & 1800).
If the phone:
• Doesn´t get serv at any of the bands, proceed to section 2.2.
• Gets serv at GSM 900, but not at GSM 1800, proceed to section 2.3.
• Gets serv at GSM 1800, but not at GSM 900, proceed to section 2.4.
• Gets serv, but can´t connect a call at any of the bands, proceed to section 2.5.
If the phone can connect a call against the GSM instrument, but not at the real net-
work, make sure the phone isn´t locked out from the system due to theft.
2.2 The phone doesn´t get serv.
Replace the antenna and try again.
Make sure the frame of the phone isn´t mechanically damaged.
Open the phone and check for liquid damages.
Make sure the antenna connection W101 (class A, fig. 2.1) isn´t oxidised or
mechanically damaged.
Check the soldering at N202 (class C), N203 (class B) and N300 (class B)(all in
fig.2.1).
If the fault remains, send the phone to the next repair level.
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