Trouble Shooting Guide, Advanced
4/00021-3/FEA 209 544/25 C
Ericsson Mobile Communications AB
71(78)
22 Top Indicator
22.1 Green top indicator does not work
Start the phone in EFRA with the test program.
Go to MMI / Display/Top.
Activate background-light with “Disp/Keyb. Led on” Fig. 22.1.
Fig.22.1
Check the voltages on X850:14 VDIG and X850: 13 TOPLED 2.7 ± 0.10 V
DC
, Fig. 22.2.
Fig. 22.2
The signal TOP LED is low when activated, if not check R860 (150 ohms).
If there is no signal at R860, the fault probably is due to D600 or a foil damage.