iPad 1 wifi + 3g restore error -1 only with communication PCB installed $ & iphone ios/hardware , assistance please

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iPad 1 wifi + 3g restore error -1 only with communication PCB installed $ & iphone ios/hardware , assistance please

On March 29, 2015, Posted by , In iPhone, With Comments Off on iPad 1 wifi + 3g restore error -1 only with communication PCB installed $ & iphone ios/hardware , assistance please

Hey folks! Great forum!


I have an iPad 1 3g model here that will not restore if a communication PCB is installed. It will throw error -1. If I restore Along without the communications PCB installed, and then install it, it will ask to activate upon reboot then restart itself never completing and throwing itself into a loop. It will work fine restored Along without the communication PCB (all other features, Including BT, WiFi, etc are OK). Things I have done to try and eliminate:

1) Swap dock PCB Along with known good PCB as per another thread.
2) Swap communication PCB Along with known good communication PCB.
3) Thoroughly cleaned all PCBs and connectors including SIM tray.
4) Inspected for damage throughout. No visual distress (water, etc).
5) Verified support peripherals are ok (Battery, etc).
6) Obvious hard resets, restores, DFU, different SIM, etc.
7) Verified comm & main PCB are original to device.
8) Attempted restore Along with just SIM tray disconnected.
9) Searched this forum extensively before asking title=smile

Ive come across one or two posts describing something similar but nothing was ever resolved. The common consensus was to Hacktivate the device, which I would like to avoid. The IMEI checks out clean everywhere ive tried it. It is not icloud locked either. The three things worth considering are:

1) The 3g midframe antenna is bad.
2) I received the device Along with no EMI shield/covers.
3) I believe ive isolated this to a main PCB issue through process of elimination.

I have the schematic and skill, but im lacking direction. Id like to repair this legitimately and for personal use. Any to be helped would be greatly appreciated. Thanks!

No Comment so far:

  1. baybee says:

    BUMP & Schematic request.

    Anybody have the 3g module schematic? Only schematics I found here are the main PCB. Ive done all the testing I can there, its time to move into this communication PCB. Thanks in advance!

  2. chugowa says:

    Do you see imei?/ .

  3. chugowa says:
    Quote:
    cal_guy
    Do you see imei?/ .

    Im not sure what you mean? Its on the back on the unit (and clean). I cant view/confirm/match it in iOS due to the inability to restore it Along with it present. Ill post the restore log and perhaps you can find the answer there.

    EDIT: Too few posts to post links, put this together: pastebin DAWT ca SLASH 2963331

    So, I plug a module in, DFU, and it doesnt find baseband. Then it does some queries, grabs the firmware, and attempt to flash the firmware to include it. It seems to stall after it succeeds to upload a stage of it and cannot reset it? Im not sure the specific process here. Im a hardware tech and only dabble in software. If its a reset line or data line, I could really use the missing schematic. Thanks! title=smile