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Nokia RM-840 User Manual
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32 KHz RTC clock does not work
If the 32 KHz crystal does not work, it may be due to B2800 malfunction, matching capacitor (C2801/C2802)
or B2800 soldering defect.
RM-839; RM-840; RM-841
BB Troubleshooting and Manual Tuning Guide
Page 3 – 14
NOKIA INTERNAL USE ONLY
Issue 1
Copyright © 2013 Nokia. All rights reserved.
53
55
Table of Contents
Section 1
15
Table of Contents
15
Product Selection
17
Phone Features
17
Figure 1 RM-839/RM-840/RM-841 Product Picture
17
Accessories
18
Technical Specifications
18
Transceiver General Specifications
18
Main RF Characteristics
19
Battery Endurance
20
Environmental Conditions
20
Section 2
25
Table of Contents
25
General Tools
27
Service Tools
27
Fps-21
29
Cables
31
Ca-31D
32
Ca-89Ds
32
Ca-99Ps
33
POS (Point of Sale) Flash Concept
34
Service Concepts
34
Flashing, Certificate Restore and Product Code Change Option 1
36
Flashing, Certificate Restore and Product Code Change Option 2
37
Flashing, Certificate Restore, Product Code Change
38
BB and RF Tuning, EM Calibration
39
Section 3
43
Introduction to BB Troubleshooting
45
Baseband Self Self-Test in Care Suite
47
Dead or Jammed Device Troubleshooting
49
Power and Charging Troubleshooting
49
General Power Checking
50
Charging Troubleshooting
52
Clocking Troubleshooting
53
Power-On Key Troubleshooting
56
Flash Programming Troubleshooting
57
Interface Troubleshooting
57
Memory Troubleshooting
57
Memory Card Troubleshooting
58
SIM Cards Troubleshooting
60
Dual SIM Troubleshooting
62
USB Interface Troubleshooting
64
Keypad Troubleshooting
65
User Interface Troubleshooting
65
Keypad Illumination Troubleshooting
67
Display Module Troubleshooting
68
General Instructions for Display Troubleshooting
68
Table 1 Display Module Troubleshooting Cases
68
Table 2 Pixel Defects
68
Camera Interface Troubleshooting
69
Camera Troubleshooting Instructions
69
Display Module Troubleshooting
69
Audio Troubleshooting
71
Audio Troubleshooting Test Instructions
71
No Valid Data from Camera
71
Table 3 All Test Items for Audio
72
Internal Earpiece Troubleshooting
73
Internal Handsfree (IHF) Troubleshooting
74
Internal Microphone Troubleshooting
75
External Earpiece Troubleshooting
76
External Microphone Troubleshooting
77
Vibrator Troubleshooting
78
Baseband Manual Tuning Guide
79
Energy Management Calibration
79
PIT Function Instruction
82
PIT Function Overview
82
Certificate Restore
83
Product Code Change
85
Section 4
89
Table of Contents
89
Cellular RF Key Components
91
General Instructions for Cellular RF Troubleshooting
91
Cellular RF Main Troubleshooting
93
RF Power Supply Self Test Troubleshooting
94
RF Auto Tuning and Testing with Nokia Care Suite
95
RF Auto Tuning Procedure
95
RF Tuning and Testing
95
Automatic RF Testing with Nokia Care Suite
97
Troubleshooting with Testing and Tuning Tool
99
Release Variants Information
103
Antenna
107
Antenna Overview
107
Antenna Troubleshooting
107
Main Antenna Functionality
107
FM Radio Troubleshooting
108
FM Radio Troubleshooting (DS & SS)
108
Bluetooth Functional Description (SS)
111
Bluetooth Troubleshooting (DS & SS)
111
FM Radio Headset Troubleshooting
111
Block Diagram
112
Interface Signals
112
Component Placement
113
Symptom, Problem and Repair Solution
114
Test Coverage
115
Test Procedure
115
Section 5
121
Introduction to Camera Module Troubleshooting
123
The Effect of Image Taking Conditions on Image Quality
124
Camera Construction
128
Dynamic Camera Configuration
130
Image Quality Analysis
131
Testing for Dust in Camera Module
131
Dirty Camera Lens Protection Window
133
Testing Camera Image Sharpness
133
Camera Hardware Failure Message Troubleshooting
134
Camera Troubleshooting Flowcharts
134
Image Bit Errors
134
Camera Viewfinder Troubleshooting
136
Bad Camera Image Quality Troubleshooting
137
List of Tables
141
Introduction
143
Introduction: Phone Description
143
Battery and Charging
144
Energy Management
144
Normal and Extreme Voltages
145
Power Key and System Power-Up
146
Clocking Scheme
148
Modes of Operation
148
Power Distribution
150
Electronic Interface between Baseband and SIM
154
SIM and Micro SD
154
Electronic Interface between Baseband and Display
157
Electronic Interface between Baseband and Memory Card
157
User Interface
157
Electronic Interface between Baseband and Keypad
158
Electronic Interface between Baseband and Backlight and Illumination
159
Electronic Interface between Baseband and Camera
160
Electronic Interface between Baseband and Vibra
161
Audio Concept
162
Audio Interface
162
Internal Audio
163
External Audio
165
Cellular RF Technical Description
169
RF Block
169
Duplexer and SAW Filter
170
Receiver (RX)
170
Vctcxo
171
Transmitter (TX)
172
4
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Nokia RM-840 Specifications
General
Brand
Nokia
Model
RM-840
Category
Handhelds
Language
English
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