{
  "id": "mba-m1-usbc-charge",
  "modelId": "mba-m1",
  "title": "USB-C charging: cable, power and workload",
  "intent": "Build a one-change-at-a-time charging comparison before replacing an accessory or battery.",
  "category": "power",
  "sourceIds": [
    "mac-charge",
    "mac-spec",
    "mac-safety"
  ],
  "diagramId": "laptop-m1-ports",
  "prerequisites": [
    "M1 Air confirmed; ports and equipment dry and intact",
    "Work can be saved before a restart"
  ],
  "tools": [
    "Known compatible USB-C charging cable and adapter",
    "Known working outlet"
  ],
  "steps": [
    {
      "id": "inspect",
      "text": "Inspect the adapter, cable and accessible port without inserting a tool. Set damaged equipment aside. Use the model’s USB-C connection; a USB-C shape alone does not establish that a cable can charge.",
      "sourceIds": [
        "mac-charge",
        "mac-spec"
      ],
      "locator": "Check the hardware → inspect / different cable; Charging and Expansion"
    },
    {
      "id": "baseline",
      "text": "Connect directly to a working outlet and Mac, leaving the dock out. Record whether external power is recognized and whether the battery says charging or paused.",
      "sourceIds": [
        "mac-charge"
      ],
      "locator": "Check the hardware → outlet / power adapter"
    },
    {
      "id": "compare",
      "text": "If a compatible spare exists, change the cable while keeping adapter, outlet and workload constant; then restore the baseline before comparing another adapter. Label missing spares Not tested.",
      "sourceIds": [
        "mac-charge"
      ],
      "locator": "Check the hardware → use a different cable / power adapter; original comparison worksheet"
    },
    {
      "id": "load",
      "text": "Compare the same direct setup during light use. Review the displayed battery-health/charging state; workload and charging optimization can explain a pause without identifying a failed battery.",
      "sourceIds": [
        "mac-charge"
      ],
      "locator": "Check the software → high performance / battery health"
    },
    {
      "id": "restart",
      "text": "Save work before a normal restart if needed. For Apple silicon, Apple’s power-management advice is a restart; do not follow an Intel SMC key sequence. Record whether the symptom returned.",
      "sourceIds": [
        "mac-charge"
      ],
      "locator": "Check the software → SMC, Apple silicon"
    }
  ],
  "checks": [
    {
      "id": "safety",
      "question": "Is there swelling, a lifted case or trackpad, liquid damage, smoke, a burning smell, or damaged power equipment?",
      "goal": "Establish whether any powered comparison is safe.",
      "sourceIds": [
        "mac-safety"
      ],
      "options": [
        {
          "id": "safe",
          "label": "No visible danger",
          "next": "direct"
        },
        {
          "id": "danger",
          "label": "Yes, or suspected damage",
          "next": "stop"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "direct",
      "question": "Is a compatible, undamaged setup connected directly to a working outlet?",
      "goal": "Establish a reproducible baseline.",
      "sourceIds": [
        "mac-charge"
      ],
      "options": [
        {
          "id": "yes",
          "label": "Direct setup ready",
          "next": "recognition"
        },
        {
          "id": "missing",
          "label": "Compatibility or outlet not established",
          "next": "attention"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "recognition",
      "question": "Does the Mac recognize external power?",
      "goal": "Separate input recognition from charge percentage.",
      "sourceIds": [
        "mac-charge"
      ],
      "options": [
        {
          "id": "recognized",
          "label": "Power recognized",
          "next": "charge-state"
        },
        {
          "id": "absent",
          "label": "Still unrecognized after available comparison",
          "next": "service"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "charge-state",
      "question": "What best describes the charging observation?",
      "goal": "Retain load and pause information.",
      "sourceIds": [
        "mac-charge"
      ],
      "options": [
        {
          "id": "normal",
          "label": "Charging or documented pause at light load",
          "next": "ready"
        },
        {
          "id": "accessory",
          "label": "Only one compatible accessory combination works",
          "next": "accessory"
        },
        {
          "id": "unexplained",
          "label": "Continued drain or no charge at light load",
          "next": "service"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    }
  ],
  "terminals": {
    "ready": {
      "type": "preparation_saved",
      "title": "Charging condition recorded",
      "text": "Keep the working setup and displayed charging state as the baseline.",
      "handoff": [
        "Record direct connection and light-use behavior.",
        "Escalate repeated unexplained drain with this comparison."
      ]
    },
    "accessory": {
      "type": "maintenance_possible",
      "title": "Keep the accessory comparison",
      "text": "A repeatable difference narrows the next support question; it does not establish which internal part failed.",
      "handoff": [
        "Set aside the suspect cable/adapter.",
        "Bring both combination results and compatible accessory details to Apple."
      ]
    },
    "service": {
      "type": "service_needed",
      "title": "Request a charging review",
      "text": "Unrecognized power or continued unexplained charging failure needs inspection.",
      "handoff": [
        "Bring the Mac and affected adapter/cable.",
        "Report power recognition separately from percentage and workload."
      ]
    },
    "attention": {
      "type": "maintenance_possible",
      "title": "Establish the charging baseline",
      "text": "Confirm the supplied or compatible charging equipment and a working outlet before a second trial.",
      "handoff": [
        "Identify adapter compatibility from its documentation.",
        "Leave cable/adapter comparisons not performed clearly marked."
      ]
    },
    "uncertain": {
      "type": "preparation_saved",
      "title": "Keep the unanswered checks visible",
      "text": "Power recognition, accessory compatibility or charge state is still unknown. Avoid buying a battery from an untested setup.",
      "handoff": [
        "Share which direct charging combination was tested.",
        "Provide recognized-power, workload and displayed charge-state observations.",
        "Keep unperformed conditions marked Not tested. Ask the provider to confirm these before further changes."
      ]
    },
    "stop": {
      "type": "service_needed",
      "title": "Stop the powered checks",
      "text": "Stop using or charging damaged equipment. Keep away from hot or smoking equipment; obtain emergency help for an immediate fire risk. Arrange manufacturer guidance before handling or transport.",
      "handoff": [
        "Tell Apple about the visible damage before arranging a MacBook Air service.",
        "Share which direct charging combination was tested.",
        "Do not open the case, remove the battery, press a lifted surface, or continue a test to complete this record."
      ]
    }
  },
  "missing": "Power recognition, accessory compatibility or charge state is still unknown. Avoid buying a battery from an untested setup.",
  "handoff": [
    "Share which direct charging combination was tested.",
    "Provide recognized-power, workload and displayed charge-state observations."
  ],
  "outcomeChecks": [
    "Only one component changed per comparison.",
    "A charging pause is recorded separately from no external power."
  ],
  "workflow": {
    "family": "power-comparison",
    "summary": "Keep cable, adapter and workload observations attached to each charging trial.",
    "osOptions": [
      "macos26-plus",
      "macos-earlier",
      "macos-unknown"
    ],
    "fields": [
      {
        "id": "power-path",
        "label": "Power path",
        "type": "select",
        "options": [
          {
            "value": "not-checked",
            "label": "Not checked"
          },
          {
            "value": "direct",
            "label": "Adapter directly to Mac"
          },
          {
            "value": "dock",
            "label": "Through dock/hub"
          },
          {
            "value": "display",
            "label": "Through display"
          }
        ]
      },
      {
        "id": "power-recognition",
        "label": "External power status",
        "type": "select",
        "options": [
          {
            "value": "unknown",
            "label": "Not checked"
          },
          {
            "value": "recognized",
            "label": "Recognized"
          },
          {
            "value": "not-recognized",
            "label": "Not recognized"
          }
        ]
      },
      {
        "id": "charge-state",
        "label": "Displayed battery state",
        "type": "select",
        "options": [
          {
            "value": "unknown",
            "label": "Not checked"
          },
          {
            "value": "charging",
            "label": "Charging"
          },
          {
            "value": "paused",
            "label": "Charging paused / not charging"
          },
          {
            "value": "draining",
            "label": "Level falls during use"
          }
        ]
      },
      {
        "id": "workload",
        "label": "Workload during comparison",
        "type": "select",
        "options": [
          {
            "value": "unknown",
            "label": "Not recorded"
          },
          {
            "value": "light",
            "label": "Light use"
          },
          {
            "value": "heavy",
            "label": "Demanding app"
          },
          {
            "value": "shut-down",
            "label": "Shut down"
          }
        ]
      }
    ],
    "matrix": {
      "title": "Controlled power comparisons",
      "rows": [
        {
          "id": "baseline",
          "label": "Direct baseline",
          "condition": "Original compatible adapter and charging cable; light use"
        },
        {
          "id": "cable",
          "label": "One alternative cable",
          "condition": "Same outlet and adapter; compatible cable only"
        },
        {
          "id": "adapter",
          "label": "One alternative adapter",
          "condition": "Same cable and outlet; compatible adapter only"
        }
      ],
      "results": [
        {
          "value": "not-tested",
          "label": "Not tested"
        },
        {
          "value": "works",
          "label": "Works in this condition"
        },
        {
          "value": "fails",
          "label": "Fails in this condition"
        },
        {
          "value": "intermittent",
          "label": "Intermittent"
        },
        {
          "value": "not-applicable",
          "label": "Not applicable"
        }
      ]
    },
    "reportFocus": [
      "Recognized power versus charge state",
      "Single accessory change",
      "Unavailable comparison equipment"
    ],
    "notDoneGuidance": [
      "Do not substitute a random low-power source as the known-good baseline.",
      "A missing compatible spare remains Not tested."
    ]
  },
  "entityKind": "task",
  "version": "2.0.0",
  "deviceFamily": "laptop",
  "modelApplicability": {
    "id": "mba-m1",
    "name": "MacBook Air M1",
    "family": "laptop",
    "revision": "MacBook Air (M1, 2020), Apple M1 chip",
    "os": "macOS Big Sur or later; Ventura and later call the preferences app System Settings. Diagnostic screens vary by macOS.",
    "region": "US-first; local repair provider requirements vary.",
    "help": "Choose Apple menu → About This Mac. Confirm MacBook Air (M1, 2020) and Chip: Apple M1. An Intel processor or another chip does not match.",
    "exclusions": [
      "MacBook Air Intel 2020",
      "MacBook Air M2",
      "MacBook Pro M1"
    ],
    "sourceIds": [
      "mac-id",
      "mac-spec",
      "mac-diagnostics"
    ]
  },
  "exclusions": [
    "MacBook Air Intel 2020",
    "MacBook Air M2",
    "MacBook Pro M1"
  ],
  "materials": [
    "Keep any existing backup accessible to you.",
    "Keep credentials and personal files outside this record."
  ],
  "stopConditions": [
    "Stop using and charging equipment with swelling, casing separation, smoke, a burning smell or suspected battery damage. Do not open or press on it.",
    "Set damaged accessories aside. Do not open mains adapters or force connectors.",
    "Do not erase, reset, flash firmware or bypass a lock as a default diagnostic step."
  ],
  "branches": [
    {
      "from": "safety",
      "answer": "safe",
      "to": "direct"
    },
    {
      "from": "safety",
      "answer": "danger",
      "to": "stop"
    },
    {
      "from": "safety",
      "answer": "unknown",
      "to": "uncertain"
    },
    {
      "from": "direct",
      "answer": "yes",
      "to": "recognition"
    },
    {
      "from": "direct",
      "answer": "missing",
      "to": "attention"
    },
    {
      "from": "direct",
      "answer": "unknown",
      "to": "uncertain"
    },
    {
      "from": "recognition",
      "answer": "recognized",
      "to": "charge-state"
    },
    {
      "from": "recognition",
      "answer": "absent",
      "to": "service"
    },
    {
      "from": "recognition",
      "answer": "unknown",
      "to": "uncertain"
    },
    {
      "from": "charge-state",
      "answer": "normal",
      "to": "ready"
    },
    {
      "from": "charge-state",
      "answer": "accessory",
      "to": "accessory"
    },
    {
      "from": "charge-state",
      "answer": "unexplained",
      "to": "service"
    },
    {
      "from": "charge-state",
      "answer": "unknown",
      "to": "uncertain"
    }
  ],
  "sources": [
    {
      "id": "mac-charge",
      "title": "If your Mac battery will not charge",
      "url": "https://support.apple.com/en-gb/guide/mac-help/-mh29198/mac",
      "locator": "Check the software / Check the hardware",
      "purpose": "Compatible charging equipment, recognition/load comparison and Apple silicon restart",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-spec",
      "title": "MacBook Air (M1, 2020) technical specifications",
      "url": "https://support.apple.com/en-us/111883",
      "locator": "Charging and Expansion / Display Support",
      "purpose": "Two USB-C Thunderbolt/USB4 ports and one native external display up to 6K at 60 Hz",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-safety",
      "title": "Important safety information for your Mac",
      "url": "https://support.apple.com/guide/macbook-air/important-safety-information-apd9b8f7aa11/mac",
      "locator": "Handling / Built-in battery / Charging",
      "purpose": "General damaged-equipment and moisture safety only; M1-specific connections are sourced from mac-spec",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-id",
      "title": "Identify MacBook Air model",
      "url": "https://support.apple.com/en-ie/102869",
      "locator": "Find model / MacBook Air M1 2020",
      "purpose": "Model and chip confirmation",
      "checkedAt": "2026-10-04",
      "reuse": "Reference only. Original paraphrase; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-diagnostics",
      "title": "Use Apple Diagnostics to test your Mac",
      "url": "https://support.apple.com/en-gb/102550",
      "locator": "Prepare / Apple silicon / Run Apple Diagnostics / Results",
      "purpose": "M1 Options then Command-D; Tahoe 26+ selected tests versus earlier automatic testing; preserve reference code",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    },
    {
      "id": "mac-display",
      "title": "External display dark or low resolution",
      "url": "https://support.apple.com/en-gb/102501",
      "locator": "Connections / Support limits / Detection / Accessory permission",
      "purpose": "Direct video path, Detect Displays and detection versus image",
      "checkedAt": "2026-10-13",
      "reuse": "Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.",
      "licenseStatus": "Public support document; no redistribution license assumed."
    }
  ],
  "assets": [
    {
      "id": "laptop-m1-ports",
      "path": "/assets/laptop-m1-ports.svg",
      "title": "M1 Air connection map",
      "alt": "Original schematic showing two left USB-C ports, right headphone jack and a direct one-display comparison.",
      "sourceIds": [
        "mac-spec",
        "mac-display"
      ],
      "caption": "Original schematic, not to scale. MacBook Air M1 (2020); one native external display. Inspect the real connector before use.",
      "kind": "Original schematic"
    }
  ],
  "relatedIds": [
    "mba-m1-usb-disabled",
    "mba-m1-diagnostics",
    "mba-m1-safe-mode"
  ],
  "estimatedDuration": {
    "minutes": 20,
    "label": "Planning estimate for recording observations; excludes charging, backups, drying and service. Not a measured repair time."
  },
  "legacyVersion": "1.0.0",
  "legacyChecks": [
    {
      "id": "safety",
      "goal": "Separate unsafe hardware from routine preparation.",
      "question": "Any swelling, casing separation, liquid damage, smoke, burning smell, or damaged battery/adapter?",
      "sourceIds": [
        "mac-charge"
      ],
      "options": [
        {
          "id": "safe",
          "label": "No visible danger",
          "next": "check-1"
        },
        {
          "id": "danger",
          "label": "Yes, or suspected damage",
          "next": "stop"
        },
        {
          "id": "unknown",
          "label": "I cannot confirm",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "check-1",
      "goal": "Confirm external power setup.",
      "question": "Is the Mac connected directly with undamaged compatible charging equipment?",
      "sourceIds": [
        "mac-charge",
        "mac-spec"
      ],
      "options": [
        {
          "id": "yes",
          "label": "Yes",
          "next": "check-2"
        },
        {
          "id": "no",
          "label": "No",
          "next": "attention"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    },
    {
      "id": "check-2",
      "goal": "Compare load and battery settings.",
      "question": "Does the battery menu recognize power with the expected charging behavior?",
      "sourceIds": [
        "mac-charge",
        "mac-spec"
      ],
      "options": [
        {
          "id": "yes",
          "label": "Power behavior understood",
          "next": "ready"
        },
        {
          "id": "no",
          "label": "Still unrecognized or unexplained",
          "next": "service"
        },
        {
          "id": "unknown",
          "label": "Not checked / unsure",
          "next": "uncertain"
        }
      ]
    }
  ],
  "legacyPreparation": [
    "Apple M1 Air is confirmed",
    "Work can be saved before restart",
    "Undamaged compatible USB-C charging cable",
    "Compatible power adapter and working outlet",
    "A private place to keep your findings",
    "A current backup if the device is accessible"
  ]
}