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| {{Repair Guide
| | #REDIRECT [[How to Fix iPhone 15 Rear Camera Not Switching Lenses Intermittent Camera]] |
| |Affects parts=Logic Board
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| |Needs equipment=Soldering Iron, Hot Air Station, Microscope
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| |Type=Soldering
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| |Difficulty=4. Specialist
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| }}
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| {{stub}}
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| == Problem description ==
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| <!--
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| Provide a concise description of the issue here. Be as specific as possible to help readers quickly determine whether or not this is the exact problem they are facing.
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| Some iPads using the CD3217 USB-C controller IC can develop a no charge, no boot, or low voltage negotiation issue. This typically happens after liquid damage or a power surge. Replacing the CD3217 alone doesn’t fix the issue, because the connected ROM IC is often corrupted or damaged.<blockquote>⚠️ Important: The CD3217 and ROM chip are not paired, but the ROM stores crucial firmware/data required for CD3217 functionality. If the CD3217 fails, it often damages the ROM, and a new CD3217 will not function unless the ROM is replaced or programmed.<br /></blockquote>
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| [[File:IPad-Not-Charging.png|thumb|Symptom 1 (Fig. 1) -- iPad Not charging and stuck at 5.00V and 0.744A]]
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| == Symptoms ==
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| <!--
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| Detail all measurable or observable symptoms in this section.
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| * Symptom 1 (Figure 1)
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| ** USB-C power meter shows only 5V — no voltage negotiation (should be 15)
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| * Symptom 2
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| ** New CD3217 IC installed but still no charge
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| == Solution ==
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| <!--
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| If the issue has a single, specific solution, provide it in this section and delete the sub-headers below. Otherwise, if there are multiple potential causes for the problem, outline the process of identifying the root cause and offer corresponding solutions below.
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| * Replace both CD3217 and ROM IC (See Fig 2)
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| * Program a new ROM using JC V1S Pro
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| * Install both chips
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| * Charging will be restored
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| === Diagnostic Steps ===
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| # [[File:CD32&ROMIC.png|thumb|Fig. 2 -- The CD3217 IC and the Ace ROM IC]]Visual Inspection | |
| #* Look for signs of corrosion/Look for shorts around the CD3217 and ROM area
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| #* Check for burnt ROM chips or CD3217
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| # Voltage Testing
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| #* Use USB-C power meter or bench power supply
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| #* Plug in USB-C and check if iPad negotiates proper voltage
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| #* 5V = error (bad CD3217/ROM or negotiation issue)<br />
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| === Repair Steps ===
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| === Step 1: Remove Damaged CD3217 & ROM ===
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| * Desolder both the faulty CD3217 and the adjacent ROM IC
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| * Clean area properly, ensure all pads are intact and usable
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| === Step 2: Prepare New CD3217 + New ROM IC ===
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| * Use a fresh CD3217 IC from a trusted supplier
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| * Get a blank ACE SPI Flash chip — compatible size for your board
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| === Step 3: Program the ROM Chip ===
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| [[File:Align-rom-jc.png|thumb|Fig. 3 -- Match the dot on the ROM chip to the triangle on the JCV1S Pro ROM Read/Write Module.]]
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| Option A: JC V1S Pro Server
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| * Use JC V1S Pro with their ROM Read/Write Module
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| * Install and align the ROM chip to the triangle on the programmer. (See Fig. 3)
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| ** Step 1] Press check on the programmer and it will detect the SPI chip.
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| ** Step 2] Select 'Open' then 'ServerFile' (Note: Your V1S Pro needs to be connected to WiFi for this to work)
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| ** Step 3] Choose corresponding file required for the model of your iPad.
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| ** Step 4] Click Write and Confirm write
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| Option B: Donor Board ROM Dump
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| * Pull a working ROM chip from a donor board of the same model
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| * Use JC V1S Pro to read and save the dump locally
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| * Click write and select the file and flash the dump onto your blank ROM IC
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| * Store dumps in a labeled folder (example: iPad Pro 11 2nd Gen CD3217 ROM.bin)
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| [[File:IPad Succesfully Charging.png|thumb|Fig.4 -- iPad Successfully charging after CD3217 and Ace ROM replacement]]
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| === Step 4: Reball & Install CD3217 ===
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| * Reball and solder new CD3217 in place
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| * Ensure all surrounding passives are intact
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| === Step 5: Install Programmed ROM ===
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| * Solder the newly programmed ROM chip in original location
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| * Clean with IPA and inspect joints under microscope
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| * Verify Charging by plugging in a charger that supports 15V charging (See Fig. 4)
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