Page 41 - Electronic Mechanic - TP - Volume - 2

ELECTRONICS MECHANIC - CITS

Replacement Test: If a component is suspected to be faulty, replace it with a known working one to see if it
resolves the issue.
Software Debugging: Update the phone’s software to the latest version or perform a factory reset to eliminate
software-related issues.
Working:
Understanding Ringer Operation: The ringer section of a cell phone system characteristically consists of a speaker
connected to a ringer circuit. When an incoming call or notification is received, the phone sends a signal to the
ringer circuit, which activates the speaker to produce sound. The sound produced by the speaker alerts the user
to the incoming call or notification.
CIRCUIT DIAGRAM:

PROCEDURE:
Determine if the phone is not ringing at all or if the sound is distorted. Check if the phone is set to silent mode or
if the ringer volume is turned down. Make a test call or send a test notification to the phone to activate the ringer.
Listen for any sound produced by the ringer.
RESULT:

Thus the speaker and Ringer sections have been inspected and replaced back to the original places.

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CITS : E & H - Electronics Mechanic - Exercise 125