Nokia RM-824 - Table 1 Audio;Table 4 Power; Table 1 Audio; Table 4 Power

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Table of Contents

Baseband main troubleshooting......................................................................................................................... 3–5

Power and charging troubleshooting................................................................................................................. 3–8

A/D converter troubleshooting....................................................................................................................... 3–8

Backup battery troubleshooting..................................................................................................................... 3–9

General power checking troubleshooting .................................................................................................. 3–10

Dead or jammed device troubleshooting................................................................................................... 3–10

Battery current troubleshooting ................................................................................................................. 3–11

Clocking troubleshooting ............................................................................................................................. 3–13

Wireless charging troubleshooting............................................................................................................. 3–13

USB charging troubleshooting..................................................................................................................... 3–15

Interface troubleshooting ................................................................................................................................. 3–16

USB flashing fault troubleshooting ............................................................................................................. 3–16

USB data interface troubleshooting............................................................................................................ 3–17

SIM interface troubleshooting ..................................................................................................................... 3–17

MicroSD interface troubleshooting.............................................................................................................. 3–19

DRAM troubleshooting....................................................................................................................................... 3–20

eMMC troubleshooting....................................................................................................................................... 3–21

Display module troubleshooting ...................................................................................................................... 3–22

General instructions for display troubleshooting...................................................................................... 3–22

Introduction to display troubleshooting.................................................................................................... 3–23

Display troubleshooting ............................................................................................................................... 3–24

Touch panel troubleshooting....................................................................................................................... 3–24

Keys troubleshooting......................................................................................................................................... 3–26

Keyboard troubleshooting ........................................................................................................................... 3–26

Keyboard backlight troubleshooting .......................................................................................................... 3–26

Sensors troubleshooting ................................................................................................................................... 3–28

Accelerometer troubleshooting................................................................................................................... 3–28

Magnetometer troubleshooting.................................................................................................................. 3–29

Alphamon technical description and troubleshooting.............................................................................. 3–30

Proximity sensor and ambient light sensor (ALS)................................................................................. 3–30

Proximity and ALS troubleshooting ....................................................................................................... 3–31

Gyroscope troubleshooting.......................................................................................................................... 3–31

Audio troubleshooting....................................................................................................................................... 3–33

Audio troubleshooting test instructions..................................................................................................... 3–33

External earpiece troubleshooting.............................................................................................................. 3–34

External microphone troubleshooting........................................................................................................ 3–34

Internal earpiece troubleshooting .............................................................................................................. 3–36

Internal handsfree (IHF) troubleshooting................................................................................................... 3–37

Internal microphone troubleshooting........................................................................................................ 3–38

Vibra troubleshooting................................................................................................................................... 3–38

Connectivity troubleshooting............................................................................................................................ 3–40

Introduction to connectivity module troubleshooting ............................................................................. 3–40

Bluetooth and WLAN troubleshooting........................................................................................................ 3–42

Introduction to Bluetooth and WLAN troubleshooting........................................................................ 3–42

Bluetooth troubleshooting ..................................................................................................................... 3–43

WLAN troubleshooting ............................................................................................................................ 3–43

GPS troubleshooting .......................................................................................................................................... 3–44

Introduction to GPS troubleshooting.......................................................................................................... 3–44

GPS troubleshooting ..................................................................................................................................... 3–46

NFC troubleshooting .......................................................................................................................................... 3–47

RM-824; RM-825; RM-826

BB Troubleshooting Guide

Issue 2 NOKIA INTERNAL USE ONLY Page 3 – 3