6.7.11 RLR (earphone-path faulty) Fault code: D 20 Affected unit: Components: Earphone Needed equipment: Multimeter Working material: none Diagnosis: The diaphragm of the earphone could be affected by deposits with increasing age. There will be a higher attenuation when measuring RLR (receiving loudness rating). In most cases the earphone is defective. If there is no noise audible on the earphone when making a sidetone check it�s also possible that the wire of the coil is cut off. Check the resistance of the coil with a multimeter. It must be about 150 ohms. If you measure a nearly infinitely high resistance, the wire may be cut off. Repair by component exchange: Use new earphone capsule. Test: Put the repaired board in a testhousing. Make a sidetone check by blowing into the microphone and checking the volume of the noise on the earphone. If there is a telephone tester with acoustic testhead make a RLR-test and check whether the attenuation is o.k.. Gigaset 3000 Classic/ Comfort
