Ericsson R250s PRO Troubleshooting Instructions page 21

5.4 Top indicator problems
5.4.1 Green top indicator
Disassemble the phone and check for liquid damage.
No further action should be taken for a liquid damaged telephone.
Make sure that the double LED H650 is correctly soldered.
•
Measure the resistance of R646 ~470 ohms.
5.4.2 If the 3,8 VDC at H650 pin4 is missing
•
Measure at N411 pin5 the 3,8VDC.
5.4.3 If the 3,2VDC at H650 pin3 is missing
•
Measure 3,2 VDC at D600 pin94.
5.4.4 Red top indicator
Disassemble the phone and check for liquid damage.
No further action should be taken for a liquid damaged telephone.
Make sure that the double LED H650 is correctly soldered.
•
Measure the resistance of R646 ~470 ohms.
4/00021-2/FEA 209 544/18 D
If the resistance is ok: Give the board power and start it up.
Measure 3,8V DC pin4 and 3,2VDC pin3 at H650.
If it is correct, replace H650.
If the level at H650 pin4 is low, replace C621.
If the level at H650 pin3 is low, replace C654.
If it still is missing, replace N411.
If there is 3,8VDC at N411 pin5, send the unit on according to the local company
directives.
If yes (3,2VDC), send the unit on according to the local company directives.
If the 3,2VDC is missing, check the soldering at that pin.
If the soldering is ok, replace D600.
If the Resistance is ok: Give the board power and start it up.
Measure 3,8V DC pin2 and 3,2VDC pin1 at H650.
Standard Trouble Shooting Instructions
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