Ericsson R320s Working Instruction page 27

Trouble Shooting Guide, Standard
3.5.2 Consumes less than 15 mA
Open the phone and check for liquid damage.
Power up the board and start it by pressing On/Off key.
Measure the VDIG voltage (2.70 V) at C703, at the side close to R703.
If the voltage is incorrect, measure the resistance from the marked side of C703 to ground. It
should be more than 150 kohms.
If the resistance is correct, send the unit on according to the local company directives
If the resistance is incorrect, replace C703.
Measure the VCORE voltage (2.40 V) at C702, at the side close to C706.
If the voltages are incorrect measure the resistance at C702, from the side close to C706, to
ground. It should be more than 200 kohms.
If the resistance is correct, send the unit on according to the local company directives
If the resistance is incorrect, replace C702.
If VDIG and VCORE are correct measure the VDSPC voltage (1.80 V) at N740 pin 5.
If the VDSPC voltage is incorrect, replace N740 and measure again.
If VDSPC still is incorrect after the replacement measure the resistance of R705 (0 ohm) and
C740 (>20 kohms).
Replace if incorrect.
If the fault remains, send the unit on according to the local company directives.
4/00021-2/FEA 209 544/21 B 11(26)