Precision 7750 Service Manual Regulatory Model: P44E Regulatory Type: P44E001 May 2020 Rev.
注意、小心和警告 注: “注意”表示帮助您更好地使用该产品的重要信息。 小心: “小心”表示可能会损坏硬件或导致数据丢失，并告诉您如何避免此类问题。 警告: “警告”表示可能会导致财产损失、人身伤害甚至死亡。 © 2020 Dell Inc. 或其子公司。保留所有权利。Dell、EMC 和其他商标均是 Dell Inc.
Contents 1 拆装计算机内部组件....................................................................................................................... 6 安全说明.................................................................................................................................................................................6 拆装计算机内部组件之前..............................................................................................................................................6 安全防范措施..........................
Removing the WLAN card............................................................................................................................................32 Installing the WLAN card.............................................................................................................................................. 33 WWAN 卡...........................................................................................................................................................................
GPU 卡................................................................................................................................................................................. 66 卸下 GPU 卡.................................................................................................................................................................. 66 安装 GPU 卡................................................................................................................................................
1 拆装计算机内部组件 安全说明 前提条件 遵循以下安全原则可防止您的计算机受到潜在损坏并确保您的人身安全。除非另有说明，否则将假设在执行本文档所述的每个过程 时均满足以下条件： • • 已经阅读了计算机附带的安全信息。 以相反顺序执行拆卸步骤可以更换组件或安装单独购买的组件。 关于此任务 注: 先断开所有电源，然后再打开计算机盖或面板。执行完计算机组件拆装工作后，装回所有护盖、面板和螺钉后再连接电源。 警告: 拆装计算机内部组件之前，请阅读计算机附带的安全说明。有关其他安全妥善实践信息，请参阅 Regulatory Compliance Homepage（管理合规性主页） 小心: 多数维修只能由经认证的维修技术人员进行。您只能根据产品说明文件中的授权，或者在联机或电话服务和支持团队的指 导下进行故障排除和简单维修。由于进行未被戴尔授权的维修所造成的损坏不在保修之内。请阅读并遵循产品附带的安全说明。 小心: 为防止静电放电，请使用接地腕带或不时触摸未上漆的金属表面（例如计算机背面的连接器）以导去身上的静电。 小心: 组件和插卡要轻拿轻放。请勿触摸组件或插卡上的触点。持拿插卡时，应持拿插卡的边缘或其金属固定
安全防范措施 安全预防措施一章详细介绍了在执行任何拆卸说明之前应采取的主要步骤。 在执行任何涉及拆卸或重新组装的安装或中断/修复过程之前，请遵守以下安全预防措施： • • • • • • 关闭系统和所有连接的外围设备。 断开系统和所有已连接的外围设备与交流电源的连接。 断开所有网络线缆、电话和电信线路与系统的连接。 拆装任何平板电脑笔记本系统内部组件时，请使用 ESD 现场服务套件，以避免静电放电 (ESD) 损坏。 卸下系统组件后，小心地将卸下的组件放在防静电垫上。 穿戴具有绝缘橡胶鞋底的鞋子以减少产生静电的机会。 备用电源 带有备用电源的戴尔产品必须完全断电，然后才能打开包装。包含备用电源的系统在关闭时实际上会开机。内部电源使系统能够远 程开启（LAN 唤醒）和暂挂进入休眠模式，并且具有其他高级电源管理功能。 拔下电源并按住电源按钮 15 秒应释放系统板中的剩余电量。从平板电脑卸下电池。笔记本卸下电池。 接合 接合是将两个或多个接地导体连接至同一个电源的一种方法。该操作可以通过使用现场服务静电放电 (ESD) 套件完成。连接接合线 时，请确保已将其连接至裸机，切勿接触漆面或非金属表面。腕带应固定并与
• • • • • • 腕带和联结线 – 腕带和联结线可以直接连接您的手腕和硬件上的裸金属（如果不需要 ESD 垫子），或连接到防静电垫子以保护 临时放置在垫子上的硬件。您的皮肤、ESD 垫子以及硬件之间的腕带和联结线的物理连接被称为联结。只能将现场服务套件与腕 带、垫子和联结线配合使用。切勿使用无线腕带。请始终注意，正常佩戴和磨损也很容易损坏腕带的内部电线，必须使用腕带测 试仪定期检查腕带，以避免意外的 ESD 硬件损坏。建议至少一星期检查一次腕带和联结线。 ESD 腕带测试仪 – ESD 腕带内部的电线容易随着时间推移而损坏。使用无监控的套件时，最好在每次服务呼叫之前定期测试腕 带，最少每周一次。腕带测试仪是执行此测试的最佳方法。如果您自己没有腕带测试仪，请联系您的地区办公室，看他们是否 有。要执行测试，在将腕带连接到您的手腕后，将腕带联结线插入测试仪器，然后按按钮以进行测试。如果测试成功，将亮起绿 色指示灯，如果测试失败，则亮起红色指示灯并发出报警音。 绝缘元件 – 请务必保持塑料散热器外壳等 ESD 敏感设备远离作为绝缘体并且通常带有大量电荷的内部部件。 工作环境 – 在部署 ESD 现场服
2 技术和组件 本章详细介绍系统中提供的技术和组件。 主题： • • • • • • • USB 功能 USB Type-C HDMI 2.0 NVIDIA Quadro T1000 NVIDIA Quadro RTX3000 NVIDIA Quadro RTX4000 NVIDIA Quadro RTX5000 USB 功能 通用串行总线 (USB) 于 1996 年推出。它大幅简化了主机计算机和外围设备（例如，鼠标、键盘、外部驱动程序和打印机）之间的连 接。 表. 1: USB 的演变 类型 数据传输速率 类别 推出年份 USB 2.0 480 Mbps 高速 2000 USB 3.2 第 1 代（之前 USB 3.0/USB 3.1 第 1 代） 5 Gbps 超高速 2010 USB 3.1 第 2 代 10 Gbps 超极速 2013 USB 3.2 第 1 代（超高速 USB） 多年来，USB 2.0 一直稳定地作为个人计算机界的实际接口标准，相关设备已售出 60 亿台，而且在空前快速的计算硬件和空前巨大 的带宽需求下，其需要更大的速度提升。USB 3.
USB 3.2 第 1 代通过下述技术变革实现了更高的性能： • • • 与现有 USB 2.0 总线并行添加的附加物理总线（参见下图）。 USB 2.0 以前有四根电线（电源线、接地线和一对用于差分数据的线路）；USB 3.1 第 1 代又增加了四根电线用作两对差分信号线 （接收和发送），总计八个连接器和接线。 USB 3.2 第 1 代利用双向数据接口，而不是 USB 2.0 的半双工排列。这使理论带宽增加了 10 倍。 应用程序 USB 3.1 第 1 代提高了速度，使设备能够提供更好的整体体验。以前，几乎无法支持 USB 视频（从最大分辨率、延迟和视频压缩的角 度来看都是如此），不难想象到，将带宽增加 5-10 倍后，USB 视频解决方案的性能会显著提升。单链路 DVI 需要将近 2 Gbps 吞吐 量。当限制为 480 Mbps 时，5 Gbps 更具前景。通过承诺的 4.8 Gbps 速度，之前未进入 USB 范围的某些产品（例如，外部 RAID 存 储系统）将采用此标准。 下面列出了部分可用的超高速 USB 3.0/USB 3.
USB Type-C 和 USB 3.2 USB 3.2 是新的 USB 标准。USB 3 的理论带宽是 5 Gbps，而 USB 3.2 是 20 Gbps，即第一代 Thunderbolt 连接器两倍的带宽。USB Type-C 与 USB 3.2 不同。USB Type-C 仅仅是接口类型，其基础即使可能仅仅是 USB 2 或 USB 3.0。实际上，Nokia 的 N1 Android 平 板电脑使用 USB Type-C 连接器，但其基础技术是 USB 2.0 — 甚至不是 USB 3.
Thunderbolt 图标 图 2: Thunderbolt 图解变化 HDMI 2.0 本主题介绍高清多媒体接口 (HDMI) 2.0 及其功能和优势。 HDMI 是业界支持并且解压缩的全数字音频/视频接口。HDMI 在任何兼容的数字化音频/视频源（如 DVD 播放器或 A/V 接收器）与 兼容的数字化音频和/或视频显示器（如数字 TV (DTV)）之间提供接口。适用于 HDMI TV 和 DVD 播放器的目标应用程序。主要优势 在于减少电缆数量和内容保护规定。HDMI 在单个电缆上支持标准、增强型或高清视频以及多信道数字音频。 HDMI 2.
表. 2: NVIDIA Quadro T1000（续） 功能 值 最大色深 高达 10 位/颜色 操作系统显卡/视频 API 支持 DirectX 12.0、OpenGL 4.6、DisplayPort 1.4、DirectX 12.1 支持的分辨率和最大刷新率 (Hz) • • 支持的显示屏数量 数字（最大值）：单个 DisplayPort 1.4 - 7680 x 4320 (8k) @ 30 Hz（mDP/Type-c 转 DP） 数字（最大值）：双 DisplayPort 1.4 - 7680 x 4320 (8k) @ 60 Hz（mDP/Type-c 转 DP） 多达 4 个显示屏 NVIDIA Quadro RTX3000 表.
Table 4. NVIDIA Quadro RTX4000(continued) Feature Values GPU base clock 14000 MHz Estimated Maximum Power 100 W Display Support eDP/mDP/HDMI/Type-C Maximum Color Depth Up to 10 bit/color Operating Systems Graphics/ Video API Support DirectX 12.0, OpenGL 4.6, DisplayPort 1.4, DirectX 12.1 Supported Resolutions and Max Refresh Rates (Hz) • • Numbers of Display Support Max Digital : Single DisplayPort 1.4 - 7680 x 4320 (8k) @ 30 Hz (mDP/Type-c to DP) Max Digital : Dual DisplayPort 1.
3 拆卸和重新组装 SD 卡 卸下 SD 卡 前提条件 1. 按照“拆装计算机内部组件之前”中的步骤进行操作。 关于此任务 此图指示 SD 卡的位置，并提供拆卸过程的可视化表示。下个审查周期内将要上传的图像。 步骤 1. 按下 SD 卡，以将其从计算机中释放出来。 2. 将 SD 卡从计算机中滑出。 安装 SD 卡 前提条件 如果您要更换组件，请卸下现有的组件，然后再执行安装步骤。 关于此任务 此图指示基座护盖的位置，并提供安装过程的可视化表示。 下个审查周期内将要上传的图像 步骤 将 SD 卡滑入计算机上的插槽中，直至其卡入到位。 后续步骤 1. 按照“拆装计算机内部组件之后”中的步骤进行操作 SSD 盖板 Removing SSD door Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the SD card.
Steps 1. Push the SSD door towards left side to release the SSD door from the base cover. 2. Remove the SSD door from the base cover. Installing SSD door Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the location of the SSD door and provides a visual representation of the installation procedure.
Steps 1. Place the SSD door into its slot on the base cover. 2. Push the SSD door towards right side to lock the SSD door. Next steps 1. Install the SD card. 2. Follow the procedure in after working inside your computer. 次要 M.2 固态硬盘 Removing the secondary M.2 Solid-state drive Prerequisites NOTE: For computers shipped with M.2 2280 or 2230 SSD installed in slot 6. 1. Follow the procedure in before working inside your computer. 2. Remove the SD card. 3. Remove the SSD door.
Steps 1. 2. 3. 4. 5. 6. Slide the SSD release latch to unlock the SSD module. Remove the (M2x3) screw that secures the SSD module into its slot on the computer. Remove the SSD module from the computer. Remove the (M2x3) screw that secures the SSD thermal pad to the SSD carrier. Remove the SSD thermal pad from the SSD module. For M.2 2280 SSD: a. Remove the M.2 2280 SSD from the SSD carrier. 7. For M.2 2230 SSD: a. Remove the M.2 2230 SSD with its holder from the SSD carrier. b.
Steps 1. For M.2 2280 SSD: a. Place the M.2 SSD onto its slot on SSD carrier. 2. For M.2 2230 SSD: 3. 4. 5. 6. a. Place the M.2 SSD into the SSD holder. b. Replace the (M2x2) screw to secure the M.2 SSD to the holder. c. Place the M.2 SSD with its holder on the SSD carrier. Place the thermal plate above the M.2 SSD module. Replace the (M2x3) screw to secure the SSD thermal plate to the M.2 SSD. Replace the SSD module in its slot on the computer. Replace the (M2x3) screw to secure the SSD module in place.
拆卸和重新组装
Steps 1. Loosen the eight captive screws that secure the base cover to the computer. 2. Using a plastic scribe, pry open the base cover starting from bottom edge of the cover. NOTE: For models shipped without SmartCard reader, pry open the base cover from the smart card reader slot. Use your fingers to pry open the base cover as the use of plastic scribe or any other sharp objects may damage the base cover.
3. Lift the base cover starting from the bottom edge and remove it from the computer. 4. Disconnect the battery cable from the connector on the system board. Installing the base cover Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the location of the base cover and provides a visual representation of the installation procedure.
拆卸和重新组装 23
Steps 1. Connect the battery cable to the connector on the system board. 2. Slide the base cover into its slot until it clicks into place. 3. Tighten the eight captive screws to secure the base cover to the computer. Next steps 1. Install the SD card. 2. Follow the procedure in after working inside your computer.
Steps 1. Remove the three (M2x5) screws that secure the battery to the computer. 2. Slightly lift the battery and disconnect the battery cable from the connector on the battery. 3. Remove the battery away from the computer. Installing the battery Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the location of the battery and provides a visual representation of the installation procedure.
Steps 1. Connect the battery cable to the connector in the battery. 2. Place the battery onto its slot in the computer. 3. Replace the three (M2x5) screws to secure the battery to the computer. Next steps 1. Install the base cover. 2. Install the SD card. 3. Follow the procedure in after working inside your computer. 固态驱动器 Removing the primary M.2 Solid-state drive Prerequisites NOTE: For computers shipped with M.2 2280 or 2230 SSD installed in slot 3, slot 4, and/or slot 5. 1.
Steps 1. Remove the (M2x3) screw that secures the SSD thermal plate to the M.2 SSD module. 2. Remove the SSD thermal plate. 3. For M.2 2280 SSD: a. Remove the (M2x3) screw that secures the M.2 SSD to the computer. b. Remove the M.2 SSD. 4. For M.2 2230 SSD: a. Remove the (M2x3) screw that secures the SSD module. b. Remove the SSD module from the computer. c. Remove the (M2x2) screw that secures the SSD to SSD holder. d. Remove the SSD from the holder. 5.
Installing the primary M.2 SSD module Prerequisites NOTE: For computers shipped with M.2 2280 or 2230 SSD installed in slot 3, slot 4, and/or slot 5. If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the location of the primary M.2 SSD and provides a visual representation of the installation procedure. Steps 1. For M.2 2280 SSD: a. Place the M.2 SSD onto its slot on the computer. b.
2. For M.2 2230 SSD: a. Place the M.2 SSD into the SSD holder. b. Replace the (M2x2) screw to secure the M.2 SSD to the holder. c. Place the M.2 SSD module onto its slot on the computer. d. Replace the (M2x3) screw to secure the M.2 SSD module to the computer. 3. Place the thermal plate above the M.2 SSD module. 4. Replace the (M2x3) screw to secure the SSD thermal plate to the M.2 SSD. 5. Repeat the above steps to install the other SSD modules in the computer. Next steps 1. Install the base cover. 2.
Installing the secondary memory module Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the location of the secondary and provides a visual representation of the installation procedure. Steps 1. Align the notch on the memory module with the tab on the memory-module slot. 2. Slide the memory module firmly into the slot and press the memory module until it clicks into place.
Steps 1. Gently slide the SIM card cover towards the left side of the system to unlock the SIM card cover. CAUTION: The SIM card cover is very fragile and can be easily damaged if it is not properly unlocked before opening. 2. Filp the right edge of the SIM card cover to open it. 3. Remove the SIM card from the SIM card slot. Installing the SIM card Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
Steps 1. Slide the SIM card into the SIM card slot. 2. Snap the SIM card cover down. 3. Slide the SIM card cover towards the right of the system to lock the cover. Next steps 1. Install the base cover. 2. Install the SD card. 3. Follow the procedure in after working inside your computer. WLAN 卡 Removing the WLAN card Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the SD card. 3. Remove the base cover.
Steps 1. 2. 3. 4. Loosen the captive screw that secures the WLAN card bracket to the system board. Remove the WLAN card bracket away from the WLAN card. Disconnect the antenna cables from the WLAN card. Slide at an angle and remove the WLAN card from the connector on the system board. Installing the WLAN card Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
2. Install the SD card. 3. Follow the procedure in after working inside your computer. WWAN 卡 Removing the WWAN card Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the SD card. 3. Remove the base cover. About this task The figure indicates the location of the WWAN card and provides a visual representation of the removal procedure. Steps 1. 2. 3. 4. Loosen the (M2x3) screw that secures the WWAN card bracket to the system board.
2. Connect the antenna cables to the connectors on the WWAN card. 3. Place the WWAN card bracket above the WWAN card to secure the antenna cables. 4. Tighten the (M2x3) screw to secure the WWAN card bracket to the system board. Next steps 1. Install the base cover. 2. Install the SD card. 3. Follow the procedure in after working inside your computer. 键盘格架 Removing the keyboard lattice Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the SD card. 3.
Installing the keyboard lattice Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the location of the M.2 SSD and provides a visual representation of the installation procedure. Steps 1. Align the keyboard lattice to its position on the keyboard. 2. Press the edges on the keyboard lattice until it clicks into place. Next steps 1. Install the base cover. 2. Install the SD card. 3.
About this task The figure indicates the location of the keyboard and provides a visual representation of the removal procedure. Steps 1. 2. 3. 4. 5. 6. Lift the latch and disconnect the keyboard cable and the keyboard backlight cable from the connectors on the touchpad module. Turn-over and open the system at 90° angle. Remove the six (M2x2.5) screws that secure the keyboard to the palmrest. Pry the bottom edge of the keyboard and then work along the left and the right sides of the keyboard.
Steps 1. 2. 3. 4. 5. Align the keyboard to its slot on the palmrest Route the keyboard cable and the keyboard backlight cable through the bottom of the palmrest. Replace the six (M2x2.5) screws to secure the keyboard to the palmrest. Turn-over the system at 90° angle to access the keyboard and the keyboard backlight cables. Connect the keyboard backlight cable and the keyboard cable to the connectors on the system board. NOTE: Ensure that you fold the keyboard data cable in perfect alignment.
主要内存模块 Removing the primary memory module Prerequisites 1. 2. 3. 4. 5. 6. Follow the procedure in before working inside your computer. Remove the SD card. Remove the base cover. Remove the battery. Remove the keyboard lattice. Remove the keyboard. About this task The figure indicates the location of the primary memory module and provides a visual representation of the removal procedure. Steps 1. Remove the (M2x3) screw that secures the memory shield in place.
2. Slide the memory shield towards the right side of the computer and lift the shield from the memory module. 3. Pry the securing clips from both side of the memory module until the memory module pops up. 4. Remove the memory module from the memory-module slot. NOTE: Repeat the above steps if there are other memory installed. Installing the primary memory module Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
4. Place the memory shield and slide it towards the left side of the computer to cover the memory module. 5. Replace the (M2x3) screw to secure the memory shield to the memory module. Next steps 1. 2. 3. 4. 5. 6. Install the keyboard. Install the keyboard lattice. Install the battery. Install the base cover. Install the SD card. Follow the procedure in after working inside your computer. 散热器 Removing the heat-sink assembly Prerequisites 1. 2. 3. 4.
4. Lift the heat-sink assembly to remove it from the computer. Installing the heat sink assembly Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the location of the keyboard and provides a visual representation of the installation procedure. Steps 1. Align and insert the heat-sink assembly into its slot on the computer. 2.
电源适配器端口 Removing the power-adapter port Prerequisites 1. 2. 3. 4. 5. Follow the procedure in before working inside your computer. Remove the SD card. Remove the base cover. Remove the battery. Remove the heat-sink assembly. About this task The figure indicates the location of the power-adapter port and provides a visual representation of the removal procedure. Steps 1. 2. 3. 4. Remove the (M2x3) screw that secures power-adapter cable bracket. Remove the power-adapter cable bracket from the computer.
Steps 1. 2. 3. 4. 5. Align and place the power-adapter cable on the computer. Place the power-adapter port into its slot on the plamrest. Replace the power-adapter cable bracket on the power-adapter port. Replace the (M2x3) screw to secure the power-adapter cable bracket to the computer. Connect the power-adapter cable to the connector on the system board. Next steps 1. 2. 3. 4. 5. Install the heat-sink assembly. Install the battery. Install the base cover. Install the SD card.
3. Remove the two (M2x3) screws that secure the power button board to the computer. 4. Remove the power button board with the power button board cable from the computer. 5. Disconnect the power button board cable from the power button board. Installing the power button board Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
Steps 1. Remove the (M2.5x2.5) screw that secures the power button assembly with fingerprint reader cable bracket to the power button board. 2. Remove the power button assembly with fingerprint reader cable bracket from the power button board. 3. Disconnect the power button assembly with fingerprint reader cable from the power button board. 4. Disconnect the power button board cable from the connector on the system board. 5. Peel the power button board cable from the palmrest. 6.
Steps 1. 2. 3. 4. 5. 6. 7. 8. Connect the power button board cable to the power button board. Align and place the power button board with power button cable into its slot on the computer. Replace the two (M2x3) screws to secure the power button board. Adhere the power button board cable to the palmrest. Connect the power button board cable to the connector on the system board.
Steps 1. 2. 3. 4. Unroute the WLAN and WWAN antenna cables from the routing guide. Disconnect the keyboard cable and the keyboard backlight cable from the connector on the touchpad module. Remove the six (M2x5) and the nine (M2x3) screws that secure the inner frame to the computer chassis. Remove the inner frame from the computer while carefully unthreading the keyboard cable and keyboard backlight cable through the opening on the inner frame.
Steps 1. Carefully route the keyboard and keyboard backlight cable through the inner frame and place the inner frame on the computer chassis. 2. Replace the six (M2x5) and the nine (M2x3) screws to secure the inner frame in place. 3. Route the WLAN and WWAN antenna cables through the routing guide. Next steps 1. 2. 3. 4. 5. 6. 7. Install the WLAN card. Install the WWAN card. Install the primary M.2 SSD. Install the battery. Install the base cover. Install the SD card.
About this task The figure indicates the location of the smart-card reader and provides a visual representation of the removal procedure. Steps 1. 2. 3. 4. 5. Disconnect the touchpad buttons cable from the touchpad. Disconnect the smart-card reader cable from the connector on the USH daughter board. Peel the smart-card reader cable from the touchpad. Remove the two (M2x2.5) screws that secure the smart-card reader to the computer. Remove the smart-card reader from the computer.
Steps 1. 2. 3. 4. 5. Align and place the smart-card reader into its slot on the computer. Replace the two (M2x2.5) screws to secure the smart-card reader in place. Adhere the smart-card reader cable to the touchpad. Connect the smart-card reader cable to the connector on the USH daughter board. Connect the touchpad button cable to the connector on the touchpad. Next steps 1. 2. 3. 4. 5. 6. 7. 8. Install the WLAN card. Install the WWAN card. Install the primary M.2 SSD. Install the inner frame.
About this task The figure indicates the location of the touchpad buttons and provides a visual representation of the removal procedure. Steps 1. For models shipped with smart card reader, disconnect the smart card reader cable from the USH daughter board and peel the smart card reader cable from the touchpad. 2. Disconnect the touchpad buttons cable from the connector on the touchpad. 3. Remove the two (M2x2.5) screws that secure the touchpad buttons to the palmrest. 4.
Steps 1. 2. 3. 4. Place the touchpad buttons into its slot in the palmrest. Replace the two (M2x2.5) screws to secure the touchpad buttons to the palmrest Connect the touchpad buttons cable to the connector in the touchpad. For models shipped with smart card reader, connect the smart card reader cable to the USH daughter board and adhere the smart card reader cable on the touchpad. Next steps 1. 2. 3. 4. 5. 6. 7. 8. Install the inner frame. Install the WLAN card. Install the WWAN card.
About this task The figure indicates the location of the SD card reader and provides a visual representation of the removal procedure. Steps 1. 2. 3. 4. Disconnect the SD card reader cable from the connector on the system board. Disconnect the LED board cable from the SD card reader on the bottom side of the computer. Remove the (M2.5x2.5) screw that secures the SD card reader in place. Slide and remove the SD card reader with its cable out of the computer.
Steps 1. 2. 3. 4. Align and place the SD care reader with its slot on the palmrest. Replace the (M2.5x2.5) screw to secure the SD card reader to the palmrest. Connect the LED board cable to the SD card reader on the bottom side of the computer. Connect the SD card reader cable to the connector on the system board. Next steps 1. 2. 3. 4. 5. 6. 7. 8. 9. Install the inner frame. Install the WLAN card. Install the WWAN card. Install the primary M.2 SSD. Install the inner frame. Install the battery.
Steps 1. Remove the two (M2x3) screws that secure the power button in its slot on the computer. 2. Remove the power button from the computer. Installing the power button Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the location of the power button and provides a visual representation of the installation procedure.
Steps 1. Place the power button into its slot on the computer. 2. Replace the two (M2x3) screws to secure the power button in place. Next steps 1. 2. 3. 4. 5. 6. Install the power button board. Install the heat-sink assembly. Install the battery. Install the base cover. Install the SD card. Follow the procedure in after working inside your computer. 带指纹读取器的电源按钮部件 Removing the power button assembly with fingerprint reader Prerequisites 1. 2. 3. 4. 5. 6.
Installing the power button assembly with fingerprint reader Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the location of the power button and provides a visual representation of the installation procedure. Steps 1. Place the power button assembly with fingerprint reader into its slot on the computer. 2.
5. Remove the keyboard lattice. 6. Remove the keyboard. About this task The figure indicates the location of the GPU power cable and provides a visual representation of the removal procedure. Steps 1. Carefully pry the GPU power cable connector outside the end of the connector head to unlock the GPU power cable connector from the GPU card. 2. Slightly slide the GPU power cable connector outwards to disconnect the GPU power cable from the GPU card. 3.
Steps 1. 2. 3. 4. Adhere the GPU power cable into its slot on the computer. Disconnect the GPU power cable from the connector on the system board. Slide the GPU power cable connector into its slot to connect the GPU power cable to the GPU card. Lock the GPU power cable connector to secure the GPU card. Next steps 1. 2. 3. 4. 5. 6. Install the keyboard. Install the keyboard lattice. Install the battery. Install the base cover. Install the SD card.
12. 13. 14. 15. 16. Remove the keyboard lattice. Remove the keyboard. Remove the primary memory. Remove the heat-sink assembly. Remove the inner frame. About this task The figure indicates the location of the system board and provides a visual representation of the removal procedure. Images to be uploaded in the next review cycle.
Steps 1. Carefully pry the GPU power cable connector outside the end of the connector head to unlock the GPU power cable connector from the system board on top side of the system. 2. Slightly slide the GPU power cable connector outwards to disconnect the GPU power cable from the connector on the system board. 3. Disconnect the speaker cable and the SD card reader cable from the connectors on the system board. 4.
NOTE: For UMA models, remove the two (M2x3) screws that secure the single beam connector in place on the bottom of the system. 10. 11. 12. 13. 14. 15. 16. Remove the beam connectors from the computer. Remove the (M2x5) screw that secures the display cable bracket in place. Remove the display cable bracket from the computer. Disconnect the display cable from the connector on the system board. Remove the four (M2x5) screws that secure the system board to the computer.
拆卸和重新组装
Steps 1. Adhere the coin-cell battery to the palmrest and then place the system board on its slot on the palmrest. 2. Replace the four (M2x5) screws to secure the system board to the palmrest. 3.
4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. Install the keyboard. Install the keyboard lattice. Install the WLAN card. Install the WWAN card. Install the secondary memory. Install the SIM card. Install the primary M.2 SSD. Install the inner frame. Install the battery. Install the base cover. Install the secondary M.2 SSD. Install the SSD door. Install the SD card. Follow the procedure in after working inside your computer. GPU 卡 卸下 GPU 卡 前提条件 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16.
关于此任务 此图指示 GPU 卡的位置，并提供安装过程的可视化表示。 下个审查周期内将要上传的图像 步骤 1. 将 GPU 卡与掌托上的插槽对齐并将其放好。 2. 拧上三颗 (M2x5) 螺钉以将 GPU 卡固定到掌托。 后续步骤 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 安装系统主板。 安装内框架。 安装散热器部件。 安装主要内存。 安装 GPU 电源线。 安装键盘。 安装键盘格架。 安装 WLAN 卡。 安装 WWAN 卡。 安装次要内存。 安装 SIM 卡。 安装主要 M.2 SSD。 安装电池。 安装基座护盖。 安装次要 M.2 SSD。 安装 SSD 盖板。 安装 SD 卡。 按照“拆装计算机内部组件之后”中的步骤进行操作 扬声器 Removing the speaker Prerequisites 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19.
About this task The figure indicates the location of the speaker and provides a visual representation of the removal procedure. Images to be uploaded in the next review cycle. Steps 1. Peel the pieces of adhesive tape that secures the speaker cable to the palmrest. 2. Pry the speaker module from its slot on the top edge of the palmrest. 3. Remove the speaker module from the computer.
Steps 1. Align and place the speaker module into its slot on the top edge of the palmrest. 2. Adhere the three piece adhesive tape to secure the speaker cable in place on the palmrest. Next steps 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. Install the system board. Install the GPU card. Install the GPU power cable. Install the inner frame. Install the heat-sink assembly. Install the primary memory. Install the keyboard. Install the keyboard lattice. Install the WLAN card.
中盖 Removing the middle cap Prerequisites 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. Follow the procedure in before working inside your computer. Remove the SD card. Remove the SSD door. Remove the secondary M.2 SSD. Remove the base cover. Remove the battery. Remove the primary M.2 SSD. Remove the SIM card. Remove the secondary memory. Remove the WWAN card. Remove the WLAN card. Remove the keyboard lattice. Remove the keyboard. Remove the primary memory.
2. Remove the middle cap from the computer. Installing the middle cap Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the location of the middle cap and provides a visual representation of the installation procedure. Steps 1. Align and insert the middle cap onto the palmrest. NOTE: Ensure that the middle cap is secured in place by the two pegs on the palmrest. 2.
15. 16. 17. 18. 19. Install the base cover. Install the secondary M.2 SSD. Install the SSD door. Install the SD card. Follow the procedure in after working inside your computer. 显示屏部件 Removing the display assembly Prerequisites 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. Follow the procedure in before working inside your computer. Remove the SD card. Remove the SSD door. Remove the secondary M.2 SSD. Remove the base cover. Remove the battery. Remove the primary M.2 SSD. Remove the SIM card.
拆卸和重新组装 73
Steps 1. Open the display assembly to a 140-degree angle and place the computer at the edge of a flat table so that the display assembly can extend below the table. 2. Remove the (M2x5) screw that secures the display bracket to the palmrest. 3. Disconnect the display cable from the connector on the system board. 4. Remove the (M2x5) screw that secures the Darwin bracket. 5. Peel and remove the WWAN cables and Darwin cables from the palmrest. 6. Remove the eight (M2.5x2.
拆卸和重新组装 75
Steps 1. 2. 3. 4. 5. 6. NOTE: Before installing the display assembly, ensure that the display hinges are opened to a 140-degree angle against the display assembly, to fit the display assembly to the palmrest. Align the screw holes on the hinges on the display assembly to the screw holes on the palmrest. Replace the eight (M2.5x2.5) screws to secure the hinges to the palmrest. Replace the (M2x5) screw to secure the display bracket to the palmrest.
13. Install the SSD door. 14. Install the SD card. 15. Follow the procedure in after working inside your computer. 掌垫 Removing the palmrest Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the SD card. 3. Remove the SSD door. 4. Remove the secondary M.2 SSD. 5. Remove the base cover. 6. Remove the battery. 7. Remove the primary M.2 SSD. 8. Remove the SIM card. 9. Remove the secondary memory. 10. Remove the WWAN card. 11. Remove the WLAN card. 12.
Installing the palmrest Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the palmrest and before performing the pre-installation parts procedures for any palmrest installation procedure. Next steps 1. Install the display assembly.
2. Install the middle cap. 3. Install the speaker. 4. Install the system board. 5. Install the GPU card. 6. Install the GPU power cable. 7. Install the inner frame. 8. Install the heat-sink assembly. 9. Install the power button or power button assembly with fingerprint reader. 10. Install the SD card reader. 11. Install the smart card reader. 12. Install the touchpad buttons. 13. Install the power button board. 14. Install the power adapter port. 15. Install the primary memory. 16. Install the keyboard. 17.
22. Remove the display assembly. About this task The figure indicates the location of the display bezel and provides a visual representation of the removal procedure. Images to be uploaded in the next review cycle. Steps 1. Using a flat head tool or a plastic scribe, pry open the display bezel from the two recess points on the bottom edge of the display bezel. 2. Working your way from the bottom edge, pry around the sides and top edge of the display bezel.
Steps 1. Place the display bezel on the display assembly. 2. Press the edges of the display bezel until it clicks onto the display assembly. Next steps 1. Install the display assembly. 2. Install the middle cap. 3. Install the speaker. 4. Install the system board. 5. Install the GPU card. 6. Install the GPU power cable. 7. Install the inner frame. 8. Install the heat-sink assembly. 9. Install the primary memory. 10. Install the keyboard. 11. Install the keyboard lattice. 12. Install the WLAN card. 13.
21. Install the SD card. 22. Follow the procedure in after working inside your computer. 显示屏面板 Removing the display panel (non-touch) Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the SD card. 3. Remove the SSD door. 4. Remove the secondary M.2 SSD. 5. Remove the base cover. 6. Remove the battery. 7. Remove the primary M.2 SSD. 8. Remove the SIM card. 9. Remove the secondary memory. 10. Remove the WWAN card. 11. Remove the WLAN card. 12.
Steps 1. 2. 3. 4. 5. 6. 7. 8. Remove the two (M2.5x2.5) screws and the two (M2x2.5) screws that secures the display panel to the display assembly. Lift the display panel and turn the display panel over to access the display cable Peel the conductive tape covering the display cable. Peel the adhesive tapes that secures the display cable. Peel the adhesive rubber strip covering the display cable. Unlock the display cable connector and then disconnect the display cable from the back of the display panel.
Installing the display panel (non-touch) Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the display panel and provides a visual representation of the installation procedure. Steps 1. 2. 3. 4. 84 Connect the display cable to the connector on the back of the display panel and lock the display cable connector. Adhere the adhesive rubber strip to cover the display cable.
5. Replace the two (M2.5X2.5) and two (M2x2.5) screws to secure the display panel to the display assembly. Next steps 1. Install the display bezel. 2. Install the display assembly. 3. Install the middle cap. 4. Install the speaker. 5. Install the display assembly. 6. Install the system board. 7. Install the GPU card. 8. Install the GPU power cable. 9. Install the inner frame. 10. Install the heat-sink assembly. 11. Install the primary memory. 12. Install the keyboard. 13. Install the keyboard lattice. 14.
22. Remove the display bezel. 23. Remove the display panel. About this task The figure indicates the location of the display hinge and provides a visual representation of the removal procedure. Images to be uploaded in the next review cycle. Steps 1. Remove the eight (M2.5x2.5) screws that secures the display hinges to the display assembly. 2. Remove the display hinges.
Steps 1. Place the display hinge in its slot on the display assembly. 2. Replace the eight (M2.5x2.5) screws to secure the display hinge to the display assembly. Next steps 1. Install the display panel. 2. Install the display bezel. 3. Install the speaker. 4. Install the display assembly. 5. Install the system board. 6. Install the GPU card. 7. Install the GPU power cable. 8. Install the inner frame. 9. Install the heat-sink assembly. 10. Install the primary memory. 11. Install the keyboard. 12.
摄像头 Removing the camera (non-touch) Prerequisites 1. Follow the procedure in before working inside your computer. 2. Remove the SD card. 3. Remove the SSD door. 4. Remove the secondary M.2 SSD. 5. Remove the base cover. 6. Remove the battery. 7. Remove the primary M.2 SSD. 8. Remove the SIM card. 9. Remove the secondary memory. 10. Remove the WWAN card. 11. Remove the WLAN card. 12. Remove the keyboard lattice. 13. Remove the keyboard. 14. Remove the primary memory. 15. Remove the heat-sink assembly. 16.
Steps 1. 2. 3. 4. Peel the adhesive tape that covers the camera module. Disconnect the display cable from the camera module. Gently pry the camera shutter cap from the top edge of the camera shutter and remove it from the display back cover. Gently pry the camera module from the display back cover. Installing the camera Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure.
13. Install the WLAN card. 14. Install the WWAN card. 15. Install the secondary memory. 16. Install the SIM card. 17. Install the primary M.2 SSD. 18. Install the battery. 19. Install the base cover. 20. Install the secondary M.2 SSD. 21. Install the SSD door. 22. Install the SD card. 23. Follow the procedure in after working inside your computer. P 传感器板 卸下 P 传感器板 前提条件 1. 按照“拆装计算机内部组件之前”中的步骤进行操作。 2. 卸下 SD 卡。 3. 卸下 SSD 盖板。 4. 卸下次要 M.2 SSD。 5. 卸下基座护盖。 6. 卸下电池。 7. 卸下主要 M.2 SSD。 8. 卸下 SIM 卡。 9. 卸下次要内存。 10.
安装 P 传感器板 前提条件 如果您要更换组件，请卸下现有的组件，然后再执行安装步骤。 关于此任务 此图指示 P 传感器板的位置，并提供安装过程的可视化表示。 下个审查周期内将要上传的图像 步骤 1. 将显示屏线缆连接到 P 传感器板。 2. 翻转 P 传感器板，然后将其轻轻放入显示屏后盖上的插槽中 后续步骤 1. 安装显示屏面板。 2. 安装显示屏挡板。 3. 安装扬声器。 4. 安装显示屏部件。 5. 安装系统主板。 6. 安装 GPU 卡。 7. 安装 GPU 电源线。 8. 安装内框架。 9. 安装散热器部件。 10. 安装主要内存。 11. 安装键盘。 12. 安装键盘格架。 13. 安装 WLAN 卡。 14. 安装 WWAN 卡。 15. 安装次要内存。 16. 安装 SIM 卡。 17. 安装主要 M.2 SSD。 18. 安装电池。 19. 安装基座护盖。 20. 安装次要 M.2 SSD。 21. 安装 SSD 盖板。 22. 安装 SD 卡。 23.
9. Remove the secondary memory. 10. Remove the WWAN card. 11. Remove the WLAN card. 12. Remove the keyboard lattice. 13. Remove the keyboard. 14. Remove the primary memory. 15. Remove the heat-sink assembly. 16. Remove the inner frame. 17. Remove the GPU power cable. 18. Remove the GPU card. 19. Remove the system board. 20. Remove the display assembly. 21. Remove the speaker. 22. Remove the display bezel. 23. Remove the display panel. 24. Remove the P-sensor board.
4. Remove the display cable from the display back cover. Installing the display cable Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. About this task The figure indicates the display cable and provides a visual representation of the installation procedure. Steps 1. Route and adhere the display cable on the display back cover. 2. Connect the display cable to the connector on the camera module. 3.
8. Install the GPU power cable. 9. Install the inner frame. 10. Install the heat-sink assembly. 11. Install the primary memory. 12. Install the keyboard. 13. Install the keyboard lattice. 14. Install the WLAN card. 15. Install the WWAN card. 16. Install the secondary memory. 17. Install the SIM card. 18. Install the primary M.2 SSD. 19. Install the battery. 20. Install the base cover. 21. Install the secondary M.2 SSD. 22. Install the SSD door. 23. Install the SD card. 24.
For installing the components, place the display back cover on a flat surface. 1. Install the display cable. 2. Install the camera. 3. Install the display hinges. 4. Install the P-sensor board. 5. Install the display panel. 6. Install the display bezel. 7. Install the speaker. 8. Install the display assembly. 9. Install the system board. 10. Install the GPU card. 11. Install the GPU power cable. 12. Install the inner frame. 13. Install the heat-sink assembly. 14. Install the primary memory. 15.
4 故障排除 Dell SupportAssist 启动前系统性能检查诊断程序 关于此任务 SupportAssist 诊断程序（亦称为系统诊断程序）可对硬件执行全面检查。Dell SupportAssist 启动前系统性能检查诊断程序嵌入在 BIOS 中并通过 BIOS 内部启动。嵌入式系统诊断程序为特定设备组或设备提供一组选项，使您可以： • • • • • • 自动运行测试或在交互模式下运行 重复测试 显示或保存测试结果 运行全面测试以引入附加测试选项，从而提供有关失败设备的额外信息 查看告知您测试是否成功完成的状态消息 查看告知您在测试过程中所遇到问题的错误消息 注: 特定设备的某些测试需要用户交互。始终确保诊断测试执行时您在计算机终端旁。 有关详细信息，请参阅通过内置和在线诊断程序（SupportAssist ePSA、ePSA 或 PSA 错误代码）解决硬件问题。 运行 SupportAssist 启动前系统性能检查 步骤 1. 2. 3. 4. 5. 6. 7. 8.
3. 更换系统主板以修复问题。 注: 如果系统板工作正常，电池状态 LED 不会亮起。 显示屏面板电源导轨内置自检 (L-BIST) 关于此任务 后续步骤 L-BIST（LCD 电源导轨测试）是针对单一 LED 错误代码诊断测试的增强功能，可在 POST 期间自动启动。如果 LCD 从系统主板上 接通电源，则会分离 L-BIST。通过执行 LCD 电源导轨测试，L-BIST 可检查系统主板是否为 LCD 供电。如果 LCD 未接通电源，电池 状态 LED 将会闪烁 [2,8] LED 错误代码。 显示屏面板内置自检 (LCD-BIST) 关于此任务 步骤 1. 按住 D 键，然后按电源按钮。 2.
3. 显示屏面板开始显示纯色或在不同颜色之间循环。 注: 颜色顺序可能会因不同的显示屏面板供应商而异。用户只需确保颜色显示正确且没有失真或图形异常。 4. 计算机在最后一种纯色结束时重新引导。 系统诊断指示灯 电池状态指示灯 指示电源和电池充电状态。 稳定白色 — 电源适配器已连接且电池电量超过 5%。 琥珀色 — 计算机以电池作为电源运行且电池电量不足 5%。 熄灭 电源适配器已连接，电池已充满电。 计算机使用电池运行且电池电量高于 5%。 计算机处于睡眠状态、休眠状态或关闭。 • • • 电源和电池状态指示灯呈琥珀色闪烁并且发出哔声代码指示故障。 例如，电源和电池状态指示灯呈琥珀色闪烁两次后暂停，然后呈白色闪烁三次后暂停。此 2,3 模式会继续，直到计算机关闭，表示为 检测到内存或 RAM。 下表显示了不同的电源和电池状态指示灯显示方式和相关问题。 表. 6: LED 代码 诊断指示灯代码 问题说明 建议的解决方案 1.
表. 6: LED 代码（续） 诊断指示灯代码 问题说明 建议的解决方案 3,4 已找到恢复映像但无效 快擦写最新版本的 BIOS。如果问题仍然存在，则更换系 统板 3,5 EC 运行电源顺序故障 装回系统板 3,6 SBIOS 检测到闪存损坏 装回系统板 3,7 超时等待 ME 以回复 HECI 消息 装回系统板 摄像头状态指示灯：指示摄像头是否正在使用中。 • • 稳定白色 — 摄像头正在使用中。 熄灭 — 摄像头未在使用中。 大写锁定状态指示灯：指示大写锁定是否已启用或已禁用。 • • 稳定白色 — 大写锁定已启用。 熄灭 — 大写锁定已禁用。 WiFi 重启 关于此任务 如果您的计算机由于 WiFi 连接问题无法访问互联网，则可执行 WiFi 重启程序。以下步骤提供关于如何执行 WiFi 重启的说明： 注: 一些 ISP（互联网服务提供商）提供了调制解调器/路由器组合的设备。 步骤 1. 2. 3. 4. 5. 6. 7.
5 获取帮助 主题： 联系戴尔 • 联系戴尔 前提条件 注: 如果没有可用的互联网连接，可在购货发票、装箱单、帐单或戴尔产品目录上查找联系信息。 关于此任务 戴尔提供了几种在线以及基于电话的支持和服务选项。可用性会因国家和地区以及产品的不同而有所差异，某些服务可能在您所在 的国家/地区不可用。有关销售、技术支持或客户服务问题，请联系戴尔： 步骤 1. 2. 3. 4. 请转至 Dell.
