RINGER CONVERT SOUND SIGNAL IN AUDIO SIGNAL,OK TESTINGSETM/M ON BUZZ MODE TEST BOTH WIRE OF RINGER IF SHOWS VALUE BETWEEN 0.08-0.30 WITH SOUND, THEN RINGER OR SPEEKER IS OK IF NO BEEP THEN FAULTY
SPEAKER---0.15--0.30
RINGER----0.08---0.15 WITH BEEP
SPEAKER---0.15--0.30
RINGER----0.08---0.15 WITH BEEP
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