Dell OptiPlex 5260 All-In-One User manual

Dell OptiPlex 5260 All-in-One

Service Manual

Regulatory Model: W20B

Regulatory Type: W20B001

Notes, cautions, and warnings

NOTE: A NOTE indicates important information that helps you make better use of your product.

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

trademarks may be trademarks of their respective owners.

2018 - 05

Rev. A00

Contents

1 Working on your computer............................................................................................................................. 6

Safety instructions............................................................................................................................................................. 6

Turning o your computer — Windows 10.....................................................................................................................6

Before working inside your computer.............................................................................................................................. 7

After working inside your computer.................................................................................................................................7

2 Technology and components..........................................................................................................................8

DDR4................................................................................................................................................................................... 8

Key Specications........................................................................................................................................................8

DDR4 Details.................................................................................................................................................................9

USB features.....................................................................................................................................................................10

USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)............................................................................................................10

Speed........................................................................................................................................................................... 10

Applications.................................................................................................................................................................. 11

Compatibility................................................................................................................................................................12

HDMI.................................................................................................................................................................................. 12

HDMI 2.0 Features......................................................................................................................................................12

Advantages of HDMI..................................................................................................................................................12

3 Removing and Installing components............................................................................................................14

Recommended tools.........................................................................................................................................................14

Screw size list....................................................................................................................................................................15

System board layout.........................................................................................................................................................16

Rubber feet........................................................................................................................................................................17

Removing the rubber feet......................................................................................................................................... 18

Installing the rubber feet............................................................................................................................................18

Cable cover - optional...................................................................................................................................................... 19

Removing the cable cover.........................................................................................................................................19

Installing the cable cover...........................................................................................................................................20

Stand .................................................................................................................................................................................21

Removing the stand................................................................................................................................................... 21

Installing the stand.....................................................................................................................................................22

Back cover........................................................................................................................................................................ 23

Removing the back cover......................................................................................................................................... 23

Installing the back cover............................................................................................................................................24

Hard drive......................................................................................................................................................................... 25

Removing the hard drive assembly..........................................................................................................................25

Installing the hard drive assembly............................................................................................................................ 26

Memory module................................................................................................................................................................27

Removing the memory module................................................................................................................................ 28

Installing the memory module...................................................................................................................................28

System board shield.........................................................................................................................................................29

Removing the system board shield..........................................................................................................................29

Contents

3

Installing the system board shield............................................................................................................................ 30

Intel Optane....................................................................................................................................................................... 31

Removing the Intel Optane card............................................................................................................................... 31

Installing the Intel Optane card.................................................................................................................................32

Solid State Drive -SSD.................................................................................................................................................... 33

Removing the SSD card............................................................................................................................................33

Installing the SSD card.............................................................................................................................................. 34

Solid State Drive -2230................................................................................................................................................... 35

Removing the 2230 SSD card..................................................................................................................................35

Installing the 2230 SSD card.................................................................................................................................... 36

WLAN card........................................................................................................................................................................37

Removing the WLAN card........................................................................................................................................ 37

Installing the WLAN card.......................................................................................................................................... 39

System fan.........................................................................................................................................................................41

Removing the system fan..........................................................................................................................................41

Installing the system fan............................................................................................................................................42

Heat sink........................................................................................................................................................................... 43

Removing the heat sink - UMA................................................................................................................................43

Installing the heat sink - UMA.................................................................................................................................. 45

Pop-Up Camera................................................................................................................................................................47

Removing the pop-up camera.................................................................................................................................. 47

Installing the pop-up camera.................................................................................................................................... 50

Coin cell battery............................................................................................................................................................... 52

Removing the coin cell battery.................................................................................................................................52

Installing the coin cell battery...................................................................................................................................53

Processor.......................................................................................................................................................................... 54

Removing the processor........................................................................................................................................... 54

Installing the processor............................................................................................................................................. 55

Base cover........................................................................................................................................................................56

Removing the base cover......................................................................................................................................... 56

Installing the base cover........................................................................................................................................... 58

Power supply unit - PSU.................................................................................................................................................59

Removing the power supply unit -PSU...................................................................................................................59

Installing the power supply unit -PSU..................................................................................................................... 62

Power supply unit fan - PSU fan....................................................................................................................................63

Removing the power supply unit fan -PSU fan......................................................................................................63

Installing the power supply unit -PSU fan.............................................................................................................. 65

Input and Output bracket................................................................................................................................................67

Removing the Input and Output bracket................................................................................................................ 67

Installing the Input and Output bracket.................................................................................................................. 69

System board.................................................................................................................................................................... 71

Removing the system board......................................................................................................................................71

Installing the system board....................................................................................................................................... 73

Speakers............................................................................................................................................................................75

Removing the speakers.............................................................................................................................................75

Installing the speakers................................................................................................................................................77

Power button board.........................................................................................................................................................79

4

Contents

Removing the power button board..........................................................................................................................79

Installing the power button board.............................................................................................................................81

Microphones..................................................................................................................................................................... 83

Removing the microphones......................................................................................................................................83

Installing the microphones........................................................................................................................................ 85

Input and Output board................................................................................................................................................... 87

Removing the Input and Output board....................................................................................................................87

Installing the input and output board.......................................................................................................................89

Headset port..................................................................................................................................................................... 91

Removing the headset port.......................................................................................................................................91

Installing the headset port........................................................................................................................................ 92

Antennas........................................................................................................................................................................... 93

Removing the antennas............................................................................................................................................ 93

Installing the antennas...............................................................................................................................................95

Display panel..................................................................................................................................................................... 97

Removing the display panel.......................................................................................................................................97

Installing the display panel.........................................................................................................................................99

Display cable.................................................................................................................................................................... 101

Removing the display cable......................................................................................................................................101

Installing the display cable....................................................................................................................................... 102

Middle frame................................................................................................................................................................... 103

Removing the middle frame.................................................................................................................................... 104

Installing the middle frame...................................................................................................................................... 105

4 Troubleshooting your computer.................................................................................................................. 108

Enhanced Pre-Boot System Assessment — ePSA diagnostics.............................................................................. 108

Running the ePSA Diagnostics...............................................................................................................................108

Diagnostics......................................................................................................................................................................109

Camera status indicator.................................................................................................................................................109

LCD built in self test - BIST...........................................................................................................................................109

Invoking BIST............................................................................................................................................................. 110

5 Getting help.................................................................................................................................................111

Contacting Dell................................................................................................................................................................. 111

Contents

5

Working on your computer

Topics:

• Safety instructions

• Turning o your computer — Windows 10

• Before working inside your computer

• After working inside your computer

Safety instructions

Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise

noted, each procedure included in this document assumes that the following conditions exist:

• You have read the safety information that shipped with your computer.

• A component can be replaced or, if purchased separately, installed by performing the removal procedure in the reverse order.

WARNING

: Disconnect all power sources before opening the computer cover or panels. After you nish working inside the

computer, replace all covers, panels, and screws before connecting to the power source.

WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional

safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance

CAUTION: Many repairs may only be done by a certied service technician. You should only perform troubleshooting and simple

repairs as authorized in your product documentation, or as directed by the online or telephone service and support team.

Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions

that came with the product.

CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an

unpainted metal surface that is grounded to ground yourself before you touch the computer to perform any disassembly tasks.

CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its

edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by its pins.

CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have

connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the

cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a

cable, ensure that both connectors are correctly oriented and aligned.

NOTE: The color of your computer and certain components may appear dierently than shown in this document.

Turning o your computer — Windows 10

CAUTION

: To avoid losing data, save and close all open les and exit all open programs before you turn o your computer or

remove the side cover.

1 Click or tap .

2 Click or tap and then click or tap Shut down.

1

6 Working on your computer

NOTE: Ensure that the computer and all attached devices are turned o. If your computer and attached devices did not

automatically turn o when you shut down your operating system, press and hold the power button for about 6 seconds to

turn them o.

Before working inside your computer

1 Ensure that your work surface is at and clean to prevent the computer cover from being scratched.

2 Turn o your computer.

3 Disconnect all network cables from the computer (if available).

CAUTION: If your computer has an RJ45 port, disconnect the network cable by rst unplugging the cable from your

computer.

4 Disconnect your computer and all attached devices from their electrical outlets.

5 Open the display.

6 Press and hold the power button for few seconds, to ground the system board.

CAUTION: To guard against electrical shock unplug your computer from the electrical outlet before performing Step # 8.

CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an

unpainted metal surface at the same time as touching a connector on the back of the computer.

7 Remove any installed ExpressCards or Smart Cards from the appropriate slots.

After working inside your computer

After you complete any replacement procedure, ensure that you connect external devices, cards, and cables before turning on your

computer.

CAUTION

: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries

designed for other Dell computers.

1 Connect any external devices, such as a port replicator or media base, and replace any cards, such as an ExpressCard.

2 Connect any telephone or network cables to your computer.

CAUTION

: To connect a network cable, rst plug the cable into the network device and then plug it into the

computer.

3 Connect your computer and all attached devices to their electrical outlets.

4 Turn on your computer.

Working on your computer

7

Technology and components

This chapter details the technology and components available in the system.

Topics:

• DDR4

• USB features

• HDMI

DDR4

DDR4 (double data rate fourth generation) memory is a higher-speed successor to the DDR2 and DDR3 technologies and allows up to 512

GB in capacity, compared to the DDR3's maximum capacity of 128 GB per DIMM. DDR4 synchronous dynamic random-access memory is

keyed dierently from both SDRAM and DDR to prevent the user from installing the wrong type of memory into the system.

DDR4 needs 20 percent less or just 1.2 volts, compared to DDR3 which requires 1.5 volts of electrical power to operate. DDR4 also supports

a new, deep power-down mode that allows the host device to go into standby without needing to refresh its memory. Deep power-down

mode is expected to reduce standby power consumption by 40 to 50 percent.

Key Specications

The following table lists the specications' comparison between DDR3 and DDR4:

Table 1. DDR3 vs DDR4

Feature/Option DDR3 DDR4 DDR 4 Advantages

Chip Densities 512 Mb-8 Gb 4 Gb-16 Gb Larger DIMM capacities

Data rates 800 Mb/s-2133 Mb/s 1600 Mb/s-3200 Mb/s Migration to higher speed I/O

Voltage 1.5 V 1.2 V Reduced memory power

demand

Low voltage standard Yes (DDR3L at 1.35V) Anticipated at 1.05V Memory Power Reductions

Internal banks 8 16 Higher data rates

Bank groups (BG) 0 4 Faster burst accesses

VREF inputs 2 —DQs and CMD/ADDR 1 — CMD/ADDR VREFDQ Now Internal

tCK — DLL Enabled 300 Mhz-800 Mhz 667Mhz-1.6Ghz Higher data rates

tCK — DLL Disabled 10MHz – 125MHz (optional) Undened to 125MHz DLL-o now fully supported

Read Latency AL+CL AL+CL Expanded values

Write Latency AL+CWL AL+CWL Expanded values

DQ Driver (ALT) 40&Omega 48&Omega Optimal for PtP Applications

DQ Bus SSTL15 POD12 Less I/O Noise and Power

2

8 Technology and components

Feature/Option DDR3 DDR4 DDR 4 Advantages

RTT Values (in &Omega) 120,60,40,30,20 240,120,80,60,48,40,34 Support for higher data rates

RTT not allowed READ Bursts Disables during READ Bursts Ease of use

ODT Modes Nominal, Dynamic Nominal, Dynamic,Park Add’l Control Mode; OTF Value

Change

ODT Control ODT Signaling Required ODT Signaling Not Required Ease of ODT Control; Allows

Non-ODT Routing, PtP Apps

Multi-Purpose Register Four Registers – 1 Dened, 3

RFU

Four Registers – 3 Dened, 1

RFU

Provides Additional Specialty

Readout

DIMM Types RDIMM, LRDIMM, UDIMM,

SODIMM

RDIMM, LRDIMM, UDIMM,

SODIMM

DIMM Pins 240 (R, LR, U); 204 (SODIMM) 288 (R, LR, U); 260 (SODIMM)

RAS ECC CRC, Parity, Addressability, GDM More RAS features; improved

data integrity

DDR4 Details

There are subtle dierences between DDR3 and DDR4 memory modules, as listed below.

Key notch dierence

The key notch on a DDR4 module is in a dierent location from the key notch on a DDR3 module. Both notches are on the insertion edge,

but the notch location on the DDR4 is slightly dierent, to prevent the module from being installed into an incompatible board or platform.

Figure 1. Notch dierence

Increased thickness

DDR4 modules are slightly thicker than DDR3, to accommodate more signal layers.

Figure 2. Thickness dierence

Curved edge

DDR4 modules feature a curved edge to help with insertion and alleviate stress on the PCB during memory installation.

Technology and components

9

Figure 3. Curved edge

USB features

Universal Serial Bus, or USB, was introduced in 1996. It dramatically simplied the connection between host computers and peripheral

devices like mice, keyboards, external drivers, and printers.

Let's take a quick look on the USB evolution referencing to the table below.

Table 2. USB evolution

Type Data Transfer Rate Category Introduction Year

USB 2.0 480 Mbps High Speed 2000

USB 3.0/USB 3.1 Gen 1 5 Gbps Super Speed 2010

USB 3.1 Gen 2 10 Gbps Super Speed 2013

USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)

For years, the USB 2.0 has been rmly entrenched as the de facto interface standard in the PC world with about 6 billion devices sold, and

yet the need for more speed grows by ever faster computing hardware and ever greater bandwidth demands. The USB 3.0/USB 3.1 Gen 1

nally has the answer to the consumers' demands with a theoretically 10 times faster than its predecessor. In a nutshell, USB 3.1 Gen 1

features are as follows:

• Higher transfer rates (up to 5 Gbps)

• Increased maximum bus power and increased device current draw to better accommodate power-hungry devices

• New power management features

• Full-duplex data transfers and support for new transfer types

• Backward USB 2.0 compatibility

• New connectors and cable

The topics below cover some of the most commonly asked questions regarding USB 3.0/USB 3.1 Gen 1.

Speed

Currently, there are 3 speed modes dened by the latest USB 3.0/USB 3.1 Gen 1 specication. They are Super-Speed, Hi-Speed and Full-

Speed. The new SuperSpeed mode has a transfer rate of 4.8Gbps. While the specication retains Hi-Speed, and Full-Speed USB mode,

10

Technology and components

commonly known as USB 2.0 and 1.1 respectively, the slower modes still operate at 480Mbps and 12Mbps respectively and are kept to

maintain backward compatibility.

USB 3.0/USB 3.1 Gen 1 achieves the much higher performance by the technical changes below:

• An additional physical bus that is added in parallel with the existing USB 2.0 bus (refer to the picture below).

• USB 2.0 previously had four wires (power, ground, and a pair for dierential data); USB 3.0/USB 3.1 Gen 1 adds four more for two pairs

of dierential signals (receive and transmit) for a combined total of eight connections in the connectors and cabling.

• USB 3.0/USB 3.1 Gen 1 utilizes the bidirectional data interface, rather than USB 2.0's half-duplex arrangement. This gives a 10-fold

increase in theoretical bandwidth.

With today's ever increasing demands placed on data transfers with high-denition video content, terabyte storage devices, high megapixel

count digital cameras etc., USB 2.0 may not be fast enough. Furthermore, no USB 2.0 connection could ever come close to the 480Mbps

theoretical maximum throughput, making data transfer at around 320Mbps (40MB/s) — the actual real-world maximum. Similarly, USB

3.0/USB 3.1 Gen 1 connections will never achieve 4.8Gbps. We will likely see a real-world maximum rate of 400MB/s with overheads. At this

speed, USB 3.0/USB 3.1 Gen 1 is a 10x improvement over USB 2.0.

Applications

USB 3.0/USB 3.1 Gen 1 opens up the laneways and provides more headroom for devices to deliver a better overall experience. Where USB

video was barely tolerable previously (both from a maximum resolution, latency, and video compression perspective), it's easy to imagine

that with 5-10 times the bandwidth available, USB video solutions should work that much better. Single-link DVI requires almost 2Gbps

throughput. Where 480Mbps was limiting, 5Gbps is more than promising. With its promised 4.8Gbps speed, the standard will nd its way

into some products that previously weren't USB territory, like external RAID storage systems.

Listed below are some of the available SuperSpeed USB 3.0/USB 3.1 Gen 1 products:

• External Desktop USB 3.0/USB 3.1 Gen 1 Hard Drives

• Portable USB 3.0/USB 3.1 Gen 1 Hard Drives

• USB 3.0/USB 3.1 Gen 1 Drive Docks & Adapters

• USB 3.0/USB 3.1 Gen 1 Flash Drives & Readers

• USB 3.0/USB 3.1 Gen 1 Solid-state Drives

• USB 3.0/USB 3.1 Gen 1 RAIDs

• Optical Media Drives

• Multimedia Devices

• Networking

• USB 3.0/USB 3.1 Gen 1 Adapter Cards & Hubs

Technology and components

11

Compatibility

The good news is that USB 3.0/USB 3.1 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0. First of all,

while USB 3.0/USB 3.1 Gen 1 species new physical connections and thus new cables to take advantage of the higher speed capability of

the new protocol, the connector itself remains the same rectangular shape with the four USB 2.0 contacts in the exact same location as

before. Five new connections to carry receive and transmitted data independently are present on USB 3.0/USB 3.1 Gen 1 cables and only

come into contact when connected to a proper SuperSpeed USB connection.

Windows 8/10 will be bringing native support for USB 3.1 Gen 1 controllers. This is in contrast to previous versions of Windows, which

continue to require separate drivers for USB 3.0/USB 3.1 Gen 1 controllers.

Microsoft announced that Windows 7 would have USB 3.1 Gen 1 support, perhaps not on its immediate release, but in a subsequent Service

Pack or update. It is not out of the question to think that following a successful release of USB 3.0/USB 3.1 Gen 1 support in Windows 7,

SuperSpeed support would trickle down to Vista. Microsoft has conrmed this by stating that most of their partners share the opinion that

Vista should also support USB 3.0/USB 3.1 Gen 1.

HDMI

This topic explains the HDMI 2.0 and its features along with the advantages.

HDMI (High-Denition Multimedia Interface) is an industry-supported, uncompressed, all-digital audio/video interface. HDMI provides an

interface between any compatible digital audio/video source, such as a DVD player, or A/V receiver and a compatible digital audio and/or

video monitor, such as a digital TV (DTV). The intended applications for HDMI TVs, and DVD players. The primary advantage is cable

reduction and content protection provisions. HDMI supports standard, enhanced, or high-denition video, plus multichannel digital audio on

a single cable.

NOTE

: The HDMI 1.4 will provide 5.1 channel audio support.

HDMI 2.0 Features

• HDMI Ethernet Channel - Adds high-speed networking to an HDMI link, allowing users to take full advantage of their IP-enabled

devices without a separate Ethernet cable

• Audio Return Channel - Allows an HDMI-connected TV with a built-in tuner to send audio data "upstream" to a surround audio system,

eliminating the need for a separate audio cable

• 3D - Denes input/output protocols for major 3D video formats, paving the way for true 3D gaming and 3D home theater applications

• Content Type - Real-time signaling of content types between display and source devices, enabling a TV to optimize picture settings

based on content type

• Additional Color Spaces - Adds support for additional color models used in digital photography and computer graphics

• 4K Support - Enables video resolutions far beyond 1080p, supporting next-generation displays that will rival the Digital Cinema systems

used in many commercial movie theaters

• HDMI Micro Connector - A new, smaller connector for phones and other portable devices, supporting video resolutions up to 1080p

• Automotive Connection System - New cables and connectors for automotive video systems, designed to meet the unique demands of

the motoring environment while delivering true HD quality

Advantages of HDMI

• Quality HDMI transfers uncompressed digital audio and video for the highest, crispest image quality.

• Low -cost HDMI provides the quality and functionality of a digital interface while also supporting uncompressed video formats in a

simple, cost-eective manner

• Audio HDMI supports multiple audio formats from standard stereo to multichannel surround sound

• HDMI combines video and multichannel audio into a single cable, eliminating the cost, complexity, and confusion of multiple cables

currently used in A/V systems

12

Technology and components

• HDMI supports communication between the video source (such as a DVD player) and the DTV, enabling new functionality

Technology and components 13

Removing and Installing components

Topics:

• Recommended tools

• Screw size list

• System board layout

• Rubber feet

• Cable cover - optional

• Stand

• Back cover

• Hard drive

• Memory module

• System board shield

• Intel Optane

• Solid State Drive -SSD

• Solid State Drive -2230

• WLAN card

• System fan

• Heat sink

• Pop-Up Camera

• Coin cell battery

• Processor

• Base cover

• Power supply unit - PSU

• Power supply unit fan - PSU fan

• Input and Output bracket

• System board

• Speakers

• Power button board

• Microphones

• Input and Output board

• Headset port

• Antennas

• Display panel

• Display cable

• Middle frame

Recommended tools

The procedures in this document require the following tools:

• Phillips #0 screwdriver

• Phillips #1 screwdriver

3

14 Removing and Installing components

• Plastic scribe

NOTE: The #0 screw driver is for screws 0-1 and the #1 screw driver is for screws 2-4

Screw size list

Table 3. OptiPlex 5260 All-in-One

Component Screw type Quantity Screw image

Cable cover M3x9 1

System board shield M3x5 5

Solid-state drive/Intel Optane

card

M2x2.5 1

WLAN card shield M2x2.5 2

WLAN card M2x2.5 1

System fan M3 x5 3

Pop-up camera assembly M3x5 2

Pop-up camera bezel M3x5 5

Base cover M3x5 4

PSU cable M3x5 1

Power supply unit—PSU M3x5 1

Power supply unit fan—PSU fan M3x5 2

Input and Output bracket M3x5 3

System board M3x5 9

Removing and Installing components 15

Component Screw type Quantity Screw image

Speakers M3 4+7.1 XZN 4

Power button board M3x5 1

Microphone M2x2.5 2

Input and Output board shield M3x5 2

Input and Output board M2.5x3.5 2

Headset port M3x5 1

Antennas M2x2.5 2

Display panel M3x5 8

Middle frame M3x5 11

System board layout

OptiPlex 5260 All-in-One

16

Removing and Installing components

1 PSU power connector 2 Processor

3 Memory slots 4 Webcam connector

5 Touch screen cable connector 6 M.2 PCIe/SATA slot

7 System fan connector 8 LPC_Debug

9 Service mode jumper/Password clear jumper/CMOS clear

jumper

10 SATA HDD slot

11 SPI header 12 DMIC connector

13 SIO signal connector 14 SIO power connector

15 UAJ connector 16 INT_SPK connector

17 Coin cell battery 18 LVDS connector

19 M.2 WLAN slot 20 Power board button connector

21 PSU fan connector 22 Back light connector

Rubber feet

Removing and Installing components

17

Removing the rubber feet

1 Follow the procedure in Before working inside your computer.

2 Remove the Stand.

3 Pry the rubber feet at the bottom edge from the display assembly base and pull it out.

Installing the rubber feet

1 Align the rubber feet with the slots on the display assembly base and push it rmly in place.

18

Removing and Installing components

2 Install the Stand.

3 Follow the procedure in After working inside your computer

Cable cover - optional

Removing the cable cover

1 Follow the procedure in Before working inside your computer.

2 Remove the Stand.

3 Remove the single (M3x9) screw that secures the cable cover to the base cover [1].

4 Lift the cable cover o the base cover [2].

Removing and Installing components

19

Installing the cable cover

1 Place the cable cover on the base cover [1].

2 Replace the single (M3x9) screw the secures the cable cover to the base cover [2].

20

Removing and Installing components

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