Board-Level Repair Part - Microsolder Technician Grade
iPhone 12 Pro Max 128GB Lower CNC Drilled Donor Board PMIC Tristar Tigris-T Audio WiFi Swap
Bare CNC drilled lower logic board for iPhone 12 Pro Max 128GB. Stacked sandwich design - this is the lower half only. Fits A2342, A2410, A2411 and A2412 globally. Receives donor PMIC, Tristar or Tigris-T charging IC, audio codec and WiFi-BT chip. Also accepts the display IC, touch IC and backlight driver. CNC machined to OEM iPhone 12 Pro Max lower-board pad pitch. Multi-layer HDI substrate with clean copper traces around every BGA pad. Lightning flex pad layout matches OEM connector seating. No chips installed - bring your own donor chips for transfer. Visually inspected at the Forest Lake bench before every dispatch.
Lower Half Only Stacked Sandwich Design 128GB Spec Board CNC Drilled to OEM Pitch Multi-Layer HDI Substrate
AU-Wide Tracked Bench Inspected Ships 2-4 Days
Brisbane Technical Hub
Forest Lake workshop with hot air rework and microscopes. Trained microsolder techs handle chip transfers in-house. Bring the phone for service or order the bare board.
Authenticity Guaranteed
CNC machined to OEM iPhone 12 Pro Max lower-board spec. Verified BGA pad pitch with clean copper trace routing. Visually inspected at the bench before every dispatch.
Reliable Dispatch
Ships within 2-4 business days from Forest Lake QLD. Anti-static bag with foam padding for safe transit. Tracked Australia-wide delivery with signature on request.
Microsolder Technicians Only
This part requires advanced board-level repair skills. Chip removal needs hot air rework and a microscope. Reballing requires flux, low-melt solder and BGA stencils. Improper reflow will permanently damage the chips.
Not suitable for DIY repair. Visit our Forest Lake workshop for professional chip-swap service.
Make Sure You Need the LOWER Board
The iPhone 12 Pro Max uses a stacked sandwich logic board with two halves. Each half holds a different set of chips. Order the wrong half and the chips you want will not be there.
Upper Board (NOT this product)
Holds the CPU (A14 Bionic), baseband, EEPROM and NAND. Use the upper for iCloud, IMEI or NAND data recovery.
Lower Board (THIS product)
Holds PMIC, Tristar or Tigris-T, audio codec, WiFi-BT, display IC, touch IC and backlight driver. Use the lower for charging, audio, screen and connectivity fixes.
Need the upper half? Search "iPhone 12 Pro Max Upper CNC Donor Board" instead.
Compatibility - iPhone 12 Pro Max 128GB ONLY
iPhone 12 Pro Max (6.7-inch) - 128GB Only
Lower logic board - Stacked sandwich design - 128GB NAND configuration
China / HK Dual SIM
A2410
Does NOT fit:
Does not fit iPhone 12 Pro (smaller logic board). Does not fit iPhone 12 or iPhone 12 mini. Does not fit iPhone 11 Pro Max or earlier models. Does not fit iPhone 13, 14 or 15 series at all. Does not fit iPhone 12 Pro Max 256GB or 512GB capacity. Does not fit the upper half of the stacked board.
Frequently Asked Questions
What is the iPhone 12 Pro Max lower CNC drilled donor board?+
It is a clean machined PCB substrate. It mirrors the lower half of the iPhone 12 Pro Max stacked sandwich logic board. The board arrives blank with no chips installed. A microsolder technician removes working chips from a damaged donor board. Those chips then reball onto this clean substrate.
Which chips can I transfer onto this lower board?+
The lower half holds the Power Management IC (PMIC, U2700). It also holds the Tristar or Tigris-T Lightning charging IC (U6300). The audio codec, WiFi-BT combo chip, display IC, touch IC and backlight driver also live here. All of these can be lifted from a faulty donor board. Each can be reballed onto this clean substrate.
What is the difference between the upper and lower CNC board?+
The iPhone 12 Pro Max uses a stacked sandwich logic board. Two halves join with board-to-board connectors. The upper half holds the CPU, baseband, EEPROM and NAND chips. The upper handles iCloud unlock and data recovery work. The lower half holds the PMIC, charging IC, audio, WiFi and display ICs. The lower handles charging, audio, screen and connectivity fixes. This product is the lower half only.
Will this fix an iPhone 12 Pro Max that won't charge?+
It can if the no-charge fault is from damaged board traces. The Tristar or Tigris-T charging IC must still test good. Transfer the working chip onto this clean lower substrate. That restores the Lightning charging circuit. If the IC itself is dead, source a known-good replacement first. Diagnose with a power supply and ammeter before swapping.
Does the iCloud lock follow the lower board?+
No. The iCloud activation lock is bonded to the CPU chip. The CPU sits on the upper board, not the lower. The lower board has no role in iCloud authentication. To recover an iCloud-locked iPhone you need the upper CNC donor board instead.
Are any chips pre-installed on the board?+
No. This is a completely blank donor board. No PMIC, no charging IC and no audio codec are included. You must supply the working chips yourself. They come from your own donor iPhone 12 Pro Max 128GB lower board. The blank substrate gives you a clean platform to reball onto.
What tools are needed for the chip swap?+
Advanced board-level repair gear is required. A hot air rework station with fine nozzles is essential. So is a fine-tip soldering iron, low-melt solder, flux and BGA solder balls. A reballing stencil matched to iPhone 12 Pro Max BGA pitch is needed too. A stereo microscope is essential for accurate chip placement. This is not suitable for home repair.
Will this work with a 256GB or 512GB iPhone 12 Pro Max?+
No. This lower board is configured for 128GB-spec devices only. Higher-capacity models can have minor pad-layout differences. Those affect connector seating between the two halves of the stack. Check capacity in Settings, then General, then About, then Storage. Confirm 128GB on the donor phone before purchasing.
Can you do the chip swap service for me?+
Yes. Bring the phone to our Forest Lake workshop. Our technicians perform iPhone board-level repairs in-house. We use hot air stations, microscopes and OEM-pitch reballing stencils. Visit Shop 3A, 152 Woogaroo St, Forest Lake QLD 4078. Contact us first to discuss the fault and get a quote.
Does this CNC board come with a warranty?+
No warranty is included with blank CNC donor boards. The board is a bare substrate. Working performance depends entirely on the chips your technician installs. Quality of the reball and reflow work also matters. A chip damaged during removal or reflow is not covered. Test chip continuity before and after every transfer.
The JPC Mobile Quality Seal
Bench operations at Shop 3A, 152 Woogaroo St, Forest Lake QLD 4078. Every CNC drilled lower board is visually inspected before dispatch.
Brisbane Local Hub
CNC Drilled to OEM Spec
Bench Inspected
2-4 Day Tracked Dispatch
Shop 3A, 152 Woogaroo St, Forest Lake QLD 4078
