Ericsson R320s Working Instruction page 37

9.3 Red or green top indicator out of order
Open the phone and check for liquid damage.
Make sure that the double LED H650 is not incorrectly soldered.
If the soldering is correct, power up the board and start it by pressing the ON/Off key.
Measure the voltage at pin 4 of H650 (2.70 V).
If the voltage is correct, replace H650. Assemble the phone and test as described in 9.1.
If the voltage is incorrect, measure the resistance of R646 (220 ohms).
If the resistance is incorrect, replace R646.
If the resistance is correct there is a foil damage, send the unit on according to the local
company directives
If the fault remains, send the unit on according to the local company directives.
9.4 Vibrator does not work
Open the phone and check for liquid damage.
Make sure that X680 is not dirty, damaged or incorrectly soldered and that the vibrator
connector pads are not dirty or damaged.
Power up the board and start it by pressing the ON/Off key.
Measure the voltage at pin 2 of V621 (3.70 V).
If the voltage is incorrect there is a foil damage, send the unit on according to the local
company directives
4/00021-2/FEA 209 544/21 B
Fig. 9.1
Trouble Shooting Guide, Standard
21(26)