Page 103 - Electronic Mechanic - TP - Volume - 2

ELECTRONICS MECHANIC - CITS

Third-Party Repair Shops:

Some offer board-level repairs, including IC replacements.
Cost of IC Replacement:
If your phone is under warranty, IC replacement is usually covered.
Otherwise, the cost varies based on the specific IC.

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PROCEDURE:- Replacing various ICs on mobile handsets is a delicate process that requires specialized
equipment and expertise. Here’s a general procedure:
1 Identify the Damaged IC: Your phone will show different symptoms depending on the damaged IC. For
instance, the phone won’t turn on if it’s the power IC, the touchscreen won’t work if it’s the touch digitizer IC,
and you won’t hear audio if it’s the audio IC1. You can also identify damaged ICs by inspecting the phone’s
PCB; damaged ICs often have easily noticeable burn marks.
2 Acquire the Replacement IC: It’s possible to replace a damaged power IC, audio IC, touch digitizer IC, and
several other ICs on many phone models, but the replacement IC must be available.
3 Desolder the Damaged IC: This requires special desoldering equipment. The damaged IC is carefully heated
and removed from the circuit board.

4 Solder the New IC: The new IC is then soldered onto the circuit board using special soldering equipment.
5 Test the Device: After the new IC is installed, the device should be tested to ensure the replacement was
successful.

Please note that this process should be performed by a qualified technician to avoid damaging the device further.
Opening your phone might also void its warranty. If you’re not comfortable doing this yourself, consider sending
your phone to the official
RESULT
The results of replacing various ICs on mobile handsets can vary depending on the specific IC being replaced
and the phone model. However, it is generally possible to replace damaged ICs like the power management IC
(PMIC), audio IC, and touch digitizer IC, among others, with the right tools and expertise
Here are some key points regarding the replacement of ICs on mobile handsets:
• DIY Considerations: Replacing phone ICs requires special soldering and desoldering equipment and it’s not
recommended to attempt it without proper skills and tools

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CITS : E & H - Electronics Mechanic - Exercise 142