Cirrus Logic CS42L75 (338S00105) Audio Codec
Verified Hardware Cross-Reference • CS42L75 (BGA-98 WLCSP (0.40 mm pitch))
Technician Direct Cross-Reference
The Cirrus Logic 338S00105 / CS42L75 audio IC is responsible for iPhone 7/7 Plus "Loop Disease". Compatible donor boards are iPhone 7 (Intel/Qualcomm) and iPhone 7 Plus logic boards.
Compatible Donor Phones
These 2 devices share the exact same hardware component and can serve as scrap donors.
Engineering & Micro-Soldering Specs
Pinout dimensions, voltage rails, package footprint, and stencil requirements.
Workshop Harvesting & Rework SOP
Professional micro-soldering instructions for safe removal and installation.
Thermal & Short-Circuit Triage
Inject 1.0V to 1.8V on the primary VDD / VPH_PWR rail using a regulated DC bench supply. Inspect for hot spots using infrared thermal imaging or rosin atomization before removal.
Safe Desoldering & Thermal Shielding
Protect adjacent CPU and NAND flash ICs with polyimide Kapton tape and pure copper shielding. Apply RMA paste flux and heat with hot air at 345°C - 365°C with 40% airflow until balls liquefy.
Pad Cleanup & BGA Reballing
Clean scrap solder with copper desoldering braid at 320°C. Secure the chip in a iPhone 7 Audio IC U3101 Stencil, spread Sn63/Pb37 (183°C) leaded solder paste, and heat gradually at 280°C.
Alignment & Post-Install Verification
Align orientation pin 1 dot marker to the motherboard silkscreen. Reflow at 350°C until the chip naturally self-centers. Measure diode mode drops across surrounding inductors to confirm no shorts.
Cirrus Logic CS42L75 (338S00105) Audio Codec: Complete Technical Breakdown & Donor Guide
Read our technical teardown analysis for this component.