Doro Leva L20/L21 Repair/Recycle Manual V3.0

1 Repair Disclaimer

Self-service repair is not recommended unless you have the necessary technical knowledge and experience to safely handle electronic components. Attempting repairs without proper expertise can result in damage to the device, personal injury, or voiding of any applicable warranty. By choosing to proceed with a self-repair, you acknowledge and accept all risks and responsibilities associated with the process.

2 About This Document

This document provides step-by-step instructions for repairing and maintaining the Doro Leva L20/L21. It is designed to support both professional technicians and private individuals who wish to perform their own repairs.

2.1 Scope

This guide covers:

• Safe recycle, disassembly, and reassembly procedures

This guide does not cover:

• Advanced electrical diagnostics
• Software-level repairs or firmware issues
• Modifications outside manufacturer specifications

2.2 Who Can Use This Document

This guide is intended for:

• Technicians and repair professionals
• End customers interested in do-it-yourself repairs, as encouraged by the EcoDesign directive
• Recycling workers for safe disassembly of components before disposal or material recovery

2.3 How the Guide Is Structured

The document is divided into the following main sections:

• Precautions
• Required tools and materials
• Exploded view
• Disassembly Procedures
• Assembly Instructions

3 General Precautions

Before servicing the product, read the full set of precautions in this document.

3.1 Use Caution Before You Start to Repair

CAUTION! Opening or repairing a device could cause electric shock, device damage, fire, personal injury risks, and other hazards.

• Make sure that the work surface is clean and free of debris to prevent contamination of internal components.
• Wear an ESD wrist strap to prevent electrostatic discharge damage to sensitive electronic components.
• Always perform repairs in a clean, dry space with good ventilation and no combustible materials.
• Make sure no cables or components are damaged during removal. Damaged cables and components must be replaced.
• Ensure that there are no additional screws or small parts left in the device after assembly.
• Always ensure that screws are securely fastened.
• Disconnect the device from all power sources before any disassembly.

3.2 Batteries

Batteries should be handled with care and could be dangerous if not in normal condition.

CAUTION!

• Discharge the battery before attempting repair.
• Never bend, dent, puncture, or use tools to pry the battery.
• To prevent damage, store replaced batteries in the replacement packaging directly after being replaced.
• If the battery shows signs of swelling or damage, or if the device feels hot or emits a strong odour, do not attempt disassembly. Please reach out to Doro support.
• If a battery starts to vent, cover it in sand or use gloves and pliers to dispose of the battery in a fire-safe container as soon as possible.
• Be careful with the following unacceptable battery conditions: pouch damage, line protrusion, scratch, contamination mark, dot protrusion, dent, bubbling, imprinted line, swelling, or electrolyte leakage.
• Do not short-circuit the battery terminals or damage the battery, as it could result in fire or overheating.
• Do not throw the old battery in regular trash. Dispose of the battery according to local regulations.

3.3 Glass Handling

CAUTION!

• Wear protective gloves and safety glasses when handling broken glass parts.
• Apply protective film when removing damaged glass parts.
• Place the damaged glass part in the spare part packaging directly after replacement to prevent injury.

3.4 Tools and Fixtures

The use of correct tools and fixtures is strongly recommended for all device repairs.

CAUTION!

• We do not recommend performing repairs without the correct tools and fixtures.
• Improper use of tools and fixtures may result in injury, damage to the product, tools, fixtures, or spare parts.

4 Exploded View

The following table lists the parts shown in the exploded view diagram:

5 Parts Location

5.1 Connectors Main PCB

[Diagram of Main PCB with connectors labeled A-F]

5.2 Connectors Sub PCB

[Diagram of Sub PCB with connectors labeled A-D]

6 Block Diagram

[Block diagram illustrating the internal components and their connections, including UMS9117S processor, GSM/GPRS/WCDMA/LTE modem, BT 5.0, SC2720A PMIC+Audio Codec, and various peripherals like LCM, Camera, Keypad, Speaker, Receiver, Vibrator, and Battery.]

7 Tooling Definition

The following tools are required for repair:

• Forceps: Used for handling small components. [Image of forceps]
• Plastic Card: Used for prying open the device casing. [Image of a plastic card]
• Screwdriver: Used for removing screws. [Image of a screwdriver]
• Hot Gun: Used for preheating components, if necessary. [Image of a hot air gun]

8 Disassembling Procedure

8.1 Remove the Battery Cover

[Image sequence showing the removal of the battery cover.] Remove the battery cover by opening the special slot.

8.2 Remove the Battery

[Image sequence showing the removal of the battery.] Remove the battery by opening the special slot.

8.3 Remove the Screws

[Image sequence showing the location of screws to be removed.] Remove the screws (qty=7) by using the screwdriver carefully.

8.4 Remove the Lower Housing Assembly

[Image sequence showing the removal of the lower housing.] Remove the lower housing from the upper housing assembly using a plastic card. Start from the bottom of the product and then along the sides to open the lower housing assembly carefully.

8.5 Remove the PCBA

[Image sequence showing the disconnection of FPC and removal of PCBA.] Disconnect the LINK FPC from the PCBA and remove the FPC by forceps.

8.6 Disassemble the PCBA Module

[Image sequence showing the removal of SOS FPC, USB Rubber, MIC Rubber, Charger spring clip cover, and metal dome from the PCBA.]

• Remove SOS FPC and SOS holder from PCBA by forceps.
• Remove USB Rubber and MIC Rubber from PCBA by forceps.
• Remove Charger spring clip cover from PCBA by forceps.
• Remove the metal dome from PCBA by forceps.

8.7 Disassemble the B Assembly

[Image sequence showing the disassembly of the B Assembly, including removing the Flap B, LCD Window, and separating the Flap B.]

• Remove the Flap B from the upper housing by using forceps to push in the FLAP Hinge Unit carefully.
• Note: LCD Window replacement is not necessary unless the LCD Window needs to be replaced. Preheat (85°C) for about five minutes (hot air gun/heating table) and carefully remove the LCD Window with a hard plastic plectrum/card.
• Remove screws (qty=4) on the Flap B by screwdriver.
• Carefully separate the Flap B along the edge with a hard plastic plate.

8.8 Remove the 2.8 LCD

[Image sequence showing the removal of the LCD from the Sub PCB.] Remove 2.8 LCD from Sub PCB by using the forceps.

8.9 Remove the Receiver and Motor

[Image sequence showing the removal of the receiver, motor, and LINK FPC from the front housing.] Remove the motor and receiver from the front housing by using the forceps. Remove the LINK FPC from the front housing.

8.10 Remove the Keypad and Speaker

[Image sequence showing the removal of the keypad and speaker.]

• Remove Keypad from the front housing.
• Remove Speaker from the lower housing by forceps.

9 Assembling Procedure

9.1 Assemble the Keypad and Speaker

[Image sequence showing the assembly of the speaker and keypad.]

• Assemble the Speaker to the corresponding position in the lower housing.
• Assemble the keypad to the corresponding position in the front housing.

9.2 Assemble the Receiver and Motor

[Image sequence showing the assembly of the motor and receiver.] Assemble the motor and receiver from the front housing by using the forceps. Remove the LINK FPC in the front housing.

9.3 Assemble the LCD and Back Camera

[Image sequence showing the assembly of the LCD and back camera.] Assemble 2.8 LCD in Sub PCB by using the forceps. Assemble the back camera in the SUB PCB by using the forceps.

9.4 Assemble the B Assembly

[Image sequence showing the assembly of the B Assembly, including attaching the SUB PCB, screws, and screen.] Assemble the SUB PCB to the front housing. Assemble the screws to the Flap B by screwdriver. Assemble the screen to the front housing.

9.5 Assemble Components on the Upper Housing

[Image sequence showing the assembly of the Flap B to the upper housing.] Assemble the Flap B from the upper housing by using forceps to push in the special slot carefully.

9.6 Assemble the Metal Dome on PCBA

[Image sequence showing the assembly of the metal dome onto the PCBA.] Assemble the metal dome to the corresponding position in PCBA.

9.7 Assemble the PCBA

[Image sequence showing the reassembly of components onto the PCBA and attaching the PCBA to the lower housing.] Assemble the charger spring clip cover, USB Rubber, MIC Rubber, and SOS assembly from PCBA by forceps. Assemble the PCBA to the lower housing by using the forceps.

9.8 Assemble the Lower Housing Assembly

[Image sequence showing the attachment of the lower housing to the upper housing.] Assemble the lower housing to the corresponding position in the upper housing.

9.9 Assemble the Screw

[Image sequence showing the screws being reinserted.] Assemble the screws (qty=7) to the corresponding position by screwdriver carefully.

9.10 Assemble the Battery

[Image sequence showing the battery insertion.] Assemble the Battery to the corresponding position.

9.11 Assemble the Battery Cover

[Image sequence showing the battery cover being attached.] Assemble the Battery cover to the corresponding position.

10 Troubleshooting

Caution! This section is for technicians and repair professionals only.

You can retrieve diagnostic information by running a failure analysis on the device. This process identifies faults and error codes that help determine the appropriate repair actions.

Enter *#15963# and select "Item test” to test a specific function or component, then follow the on-screen instructions.

How to reboot and reset the device is described in the full manual.

11 Appendix

The full manual covers phone functions, settings, and instructions on how to update the software and firmware.

The manual is available at: https://www.doro.com/

Spare parts list, electronic board diagrams (spare parts location), wiring and connection diagrams, are available online at: https://www.doro.com/repair