Nokia NHM-7 series User manual

Technical Documentation
Programs After Market Services (PAMS)
Copyright 2001. Nokia Corporation. All Rights Reserved.


NMP Part No.0275518
NHM–7
SERIES CELLULAR
PHONES
NHM–7 issue 1: 10/2001

NHM–7
Foreword PAMS Technical Documentation
Issue 1 10/2001
Page 2 Nokia Corporation.
AMENDMENT RECORD SHEET
Amendment Date Inserted By Comments
10/2001 J. Rantala Issue 1

NHM–7
Foreword
PAMS Technical Documentation
Issue 1 10/2001 Page 3 Nokia Corporation.
NHM–7
SERIES CELLULAR PHONES
SERVICE MANUAL
CONTENTS:
1. Foreword
2. General Information
3. System & UI Module LA5/LK5
4. Part lists
5. Product Variants NHM–7
6. Service Software & Concepts
7. Service Tools
8. Disassembly Instructions
9. Troubleshooting Instructions
10. Non–serviceable Accessories
11. Schematic Diagrams

NHM–7
Foreword PAMS Technical Documentation
Issue 1 10/2001
Page 4 Nokia Corporation.
IMPORTANT
This document is intended for use by qualified service personnel only.
Company Policy
Ourpolicyisofcontinuousdevelopment;detailsofalltechnicalmodificationswill
be included with service bulletins.
Whileeveryendeavourhasbeenmadetoensuretheaccuracyofthisdocument,
some errors may exist.If any errors arefound by thereader, NOKIA Corporation
should be notified in writing.
Please state:
Title of the Document + Issue Number/Date of publication
Latest Amendment Number (if applicable)
Page(s) and/or Figure(s) in error
Please send to: Nokia Corporation
NMP
PAMS Technical Documentation
PO Box 86
24101 SALO
Finland

NHM–7
Foreword
PAMS Technical Documentation
Issue 1 10/2001 Page 5 Nokia Corporation.
Warnings and Cautions
Please refer to the phone’s user guide for instructions relating to operation,
care and maintenance including important safety information. Note also the
following:
Warnings:
1. CARE MUST BE TAKEN ON INSTALLATION IN VEHICLES
FITTED WITH ELECTRONIC ENGINE MANAGEMENT
SYSTEMS AND ANTI–SKID BRAKING SYSTEMS. UNDER
CERTAIN FAULT CONDITIONS, EMITTED RF ENERGY CAN
AFFECT THEIR OPERATION. IF NECESSARY, CONSULT THE
VEHICLE DEALER/MANUFACTURER TO DETERMINE THE
IMMUNITY OF VEHICLE ELECTRONIC SYSTEMS TO RF
ENERGY.
2. THE HANDPORTABLE TELEPHONE MUST NOT BE OPERATED
IN AREAS LIKELY TO CONTAIN POTENTIALLY EXPLOSIVE
ATMOSPHERES EG PETROL STATIONS (SERVICE STATIONS),
BLASTING AREAS ETC.
3. OPERATION OF ANY RADIO TRANSMITTING EQUIPMENT,
INCLUDING CELLULAR TELEPHONES, MAY INTERFERE WITH
THE FUNCTIONALITY OF INADEQUATELY PROTECTED
MEDICAL DEVICES. CONSULT A PHYSICIAN OR THE
MANUFACTURER OF THE MEDICAL DEVICE IF YOU HAVE
ANY QUESTIONS. OTHER ELECTRONIC EQUIPMENT MAY
ALSO BE SUBJECT TO INTERFERENCE.
Cautions:
1. Servicing and alignment must be undertaken by qualified
personnel only.
2. Ensure all work is carried out at an anti–static workstation and that
an anti–static wrist strap is worn.
3. Ensure solder, wire, or foreign matter does not enter the telephone
as damage may result.
4. Use only approved components as specified in the parts list.
5. Ensure all components, modules screws and insulators are
correctly re–fitted after servicing and alignment. Ensure all cables
and wires are repositioned correctly.

NHM–7
Foreword PAMS Technical Documentation
Issue 1 10/2001
Page 6 Nokia Corporation.
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PAMS Technical Documentation
NHM–7 Series Transceivers
Issue 1 10/2001 Nokia Corporation
General Information

NHM–7
General Information PAMS Technical Documentation
Page 2 Issue 1 10/2001
Nokia Corporation
CONTENTS
The Product 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handportable 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Desktop Option 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product and Module List 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Specifications of Transceiver NHM–7 6. . . . . . . . . . . . . .

NHM–7
General Information
PAMS Technical Documentation
Page 3
Issue 1 10/2001 Nokia Corporation
The Product
The NHM–7 is a dual band handportable mobile telephone for the
E–GSM 900 and GSM1800 networks. It is both GSM900 phase 2 power
class 4 transceiver (2W) and GSM1800 power class 1 (1W) transceiver.
The main transceiver features are:
– Integrated FM radio – Full graphic display
– GPRS – Integrated IR link & internal data
– Internal vibra – Plug & play HF support
– Plug–in SIM card below the back cover of the phone
– Back mounted antenna (no connection for external antenna)
– Jack style UI with two soft keys
Handportable
1.
3.
4.
5.
6.
ACP–7E
ACP–7C
ACP–7X
ACP–7H
ACP–7A
ACP–7U
NHM–7
2.
HDD–1
Item Name: Type code: Material code:
1. Transceiver See Product Variants
Standard battery Li–ion BLB–2 0271570
2. Headset HDD–1 0273302
3. Standard Charger (Euro plug) 207–253 Vac ACP–7E 0675144
4. Standard Charger (US plug) 108–132 Vac ACP–7U 0675143
Standard Charger (US plug) 198–242 Vac ACP–7C 0675158
5. Standard Charger (UK plug) 207–253 Vac ACP–7X 0675145
Standard Charger (UK plug) 180–220 Vac ACP–7H 0675146
6. Standard Charger (Australia) 216–264 Vac ACP–7A 0675148

NHM–7
General Information PAMS Technical Documentation
Page 4 Issue 1 10/2001
Nokia Corporation
Desktop Option
The desktop option allows the user to charge the phone from the mains.
Besides these optional chargers also ACP–7 can be used.
2.
3.
4. 5.
6.
ACP–8E
ACP–8K
ACP–8X
ACP–8U
ACP–8C
ACP–8A
DCD–1
1. NHM–7
Item Name: Type code: Material code:
1. Transceiver See Product Variants
2. Desk Stand DCD–1 0272865
3. Travel Charger Euro plug 90–264 Vac ACP–8E 0272169
Travel Charger Korea plug 90–264 Vac ACP–8K 0273111
4. Travel Charger UK plug 90–264 Vac ACP–8X 0272172
5. Travel Charger US plug 90–264 Vac ACP–8U 0675196
Travel Charger China plug 90–264 Vac ACP–8C 0675211
6. Travel Charger Australia plug 90–264 Vac ACP–8A 0271637

NHM–7
General Information
PAMS Technical Documentation
Page 5
Issue 1 10/2001 Nokia Corporation
Product and Module List
Unit/type: Product code:
NHM–7 Transceiver See Product Vari-
ants
BLB–2 Standard Battery Li–ion 0271570
ACP–7E Standard Charger (EUR) 207–253 Vac 0675144
ACP–7U Standard Charger (US) 108–132 Vac 0675143
ACP–7C Standard Charger (US) 198–242 Vac 0675158
ACP–7X Standard Charger (UK) 207–253 Vac 0675145
ACP–7H Standard Charger (UK) 180–220 Vac 0675146
ACP–7A Standard Charger (AUS) 216–264 Vac 0675148
ACP–8E Travel Charger (EUR) 90–264 Vac 0272169
ACP–8K Travel Charger (Korea) 90–264 Vac 0273111
ACP–8X Travel Charger (UK) 90–264 Vac 0272172
ACP–8U Travel Charger (US) 90–264 Vac 0675196
ACP–8C Travel Charger (China) 90–264 Vac 0675211
ACP–8A Travel Charger (Australia) 90–264 Vac 0271637
LCH–9 Mobile Charger 0675120
PPH–1 Plug–in HF Car Kit 0272170
MBD–10 Mobile Holder 0272866 Eur/Afr
0273412 APAC
MKU–1 Mounting Plate 0620036
HHS–9 Swivel Mount 0620037
DCD–1 Desktop Stand 0272865
DDC–1 Battery Charging Stand 0272418
HFM–8 HF Microphone 0271503
HDD–1 Headset 0273302
HDC–5 Headset 0271467
HDE–2 Headset 0694075
LPS–3 Loopset 0272419

NHM–7
General Information PAMS Technical Documentation
Page 6 Issue 1 10/2001
Nokia Corporation
General Specifications of Transceiver NHM–7
Parameter Unit
Cellular system GSM900 and GSM1800
RX frequency band EGSM: 925 ... 935 MHz
GSM900 935 ... 960 MHz
GSM1800 1805 ... 1880 MHz
TX frequency band EGSM 880 ... 890 MHz
GSM900 890 ... 915 MHz
GSM1800 1710 ... 1785 MHz
Output power GSM900 * +5 ...+33 dBm / 3.2 mW ... 2 W
GSM1800 +0 ...+30 dBm / 1.0 mW ... 1 W
Duplex spacing GSM900 * 45 MHz GSM1800 95 MHz
Number of RF channels EGSM 50
GSM900 124
GSM1800 374
Channel spacing 200 kHz
Number of TX power levels GSM900 * 15 GSM1800 16
Sensitivity, static channel GSM900: –102 dBm
GSM1800: –102 dBm (norm. cond. only)
Frequency error, static channel < 0.1 ppm
RMS phase error < 5.0 o
Peak phase error < 20.0 o
*) applies also to EGSM

PAMS Technical Documentation
NHM–7 Series Transceivers
Issue 1 10/2001 Nokia Corporation
System Module & UI

NHM–7
System Module & UI PAMS Technical Documentation
Page 2 Issue 1 10/2001
Nokia Corporation
CONTENTS
Transceiver NHM–7 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Modules 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Modes 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnection Diagram 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Module 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baseband Module 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block Diagram 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Summary 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Characteristics 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Regulators and Supply Voltage Ranges 10. . . . . . . . . . . . .
External and Internal Signals and Connections 11. . . . . . . . .
Internal Signals and Connections 11. . . . . . . . . . . . . . . . . . . . .
FM Radio Interface 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal microphone 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal speaker 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC and DC Characteristics of RF–BB voltage supplies 13
AC and DC Characteristics of RF–BB digital signals 14. .
AC and DC Characteristics of RF–BB analogue signals 15
External Signals and Connections 16. . . . . . . . . . . . . . . . . . . .
UI (board–to–board) connector 16. . . . . . . . . . . . . . . . . . . .
LCD connector 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC connector 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headset connector 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SIM connector 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Description 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Modes of Operation 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Voltage Regulation 21. . . . . . . . . . . . . . . . . . . . . . . . . .
Battery 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Up and Reset 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A/D Channels 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FM Radio 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IR Module 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Backup Battery 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SIM Interface 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Buzzer 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Microphone 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPP 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Block 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF Module 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF Frequency Plan 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC characteristics 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Regulators 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Distribution Diagram 31. . . . . . . . . . . . . . . . . . . . . . . . . .

NHM–7
System Module & UI
PAMS Technical Documentation
Page 3
Issue 1 10/2001 Nokia Corporation
RF characteristics 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter characteristics 32. . . . . . . . . . . . . . . . . . . . . . . .
Receiver characteristics 32. . . . . . . . . . . . . . . . . . . . . . . . . .
RF Block Diagram 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Frequency synthesizers 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmitter 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AFC function 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC–compensation 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UI Board 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LCD & Keypad Illumination 38. . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Speaker 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Schematic Diagrams (at the back of the binder): LA5 layout 15 and LK5 layout 11
(covers layout version 10)
RF & BB (Version 0.0 Edit 61) for layout version 15 A–1. . . . . . . .
RF (Version 1.0 Edit 167) for layout version 15 A–2. . . . . . . . . . . .
BB Connections (Version 0.0 Edit 96) for layout version 15 A–3. .
System Connector (Version 1.3 Edit 156) for layout version 15 A–4
Audio Interface (Version 1.3 Edit 15) for layout version 15 A–5. . .
UEM of BB (Version 2.0 Edit 164) for layout version 15 A–6. . . . . .
Light Filtering (Version 2.0 Edit 34) for layout version 15 A–7. . . .
Display and Keyboard Interface (Version 1.3 Edit 201) for layout version 15A–8
Infrared Module (Version 2.0 Edit 37) for layout version 15 A–9. .
FM Radio (Version 1.3 Edit 104) for layout version 15 A–10. . . . . .
SIM Reader (Version 4.0.1 Edit 49) for layout version 15 A–11. . . .
UPP and decoupling capacitors (Version 2.0 Edit 89) for layout version 15A–12
AMD (Version 2.0 Edit 31) for layout version 15 A–13. . . . . . . . . . . .
Layout Diagram of LA5 – Top (Version 15) A–14. . . . . . . . . . . . . . . . .
Layout Diagram of LA5 – Bottom (Version 15) A–14. . . . . . . . . . . . . .
Testpoints of LA5 – Top (Version 15) A–15. . . . . . . . . . . . . . . . . . . . . .
Testpoints of LA5 – Bottom (Version 15) A–15. . . . . . . . . . . . . . . . . . .
UI Board – LK5 for version 11 A–16. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Layout Diagram – LK5 for version 11 A–17. . . . . . . . . . . . . . . . . . . . . .

NHM–7
System Module & UI PAMS Technical Documentation
Page 4 Issue 1 10/2001
Nokia Corporation
Schematic Diagrams (at the back of the binder): LA5 layout 17 and LK5 layout 11
(covers layout version 10)
RF & BB (Version 0.0 Edit 65) for layout version 17 B–1. . . . . . . .
RF (Version 1.0 Edit 180) for layout version 17 B–2. . . . . . . . . . . .
BB Connections (Version 0.0 Edit 113) for layout version 17 B–3.
System Connector (Version 1.3 Edit 162) for layout version 17 B–4
Audio Interface (Version 1.3 Edit 80) for layout version 17 B–5. . .
UEM of BB (Version 2.0 Edit 168) for layout version 17 B–6. . . . . .
Light Filtering (Version 2.0 Edit 34) for layout version 17 B–7. . . .
Display and Keyboard Interface (Version 1.3 Edit 210) for layout version 17B–8
Infrared Module (Version 2.0 Edit 38) for layout version 17 B–9. .
FM Radio (Version 1.3 Edit 110) for layout version 17 B–10. . . . . . .
SIM Reader (Version 1.3 Edit 48) for layout version 17 B–11. . . . . .
UPP and decoupling capacitors (Version 2.0 Edit 91) for layout version 17B–12
GSM RF – BB Interface (Version 1.3 Edit 35) for layout version 17 B–13
Flash Memory (Version 2.0 Edit 32) for layout version 17 B–14. . . .
Layout Diagram of LA5 – Top (Version 17) B–15. . . . . . . . . . . . . . . . .
Layout Diagram of LA5 – Bottom (Version 17) B–15. . . . . . . . . . . . . .
Testpoints of LA5 – Top (Version xx) B–16. . . . . . . . . . . . . . . . . . . . . . .
Testpoints of LA5 – Bottom (Version 17) B–16. . . . . . . . . . . . . . . . . . .
UI Board – LK5 for version 11 B–17. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Layout Diagram – LK5 for version 11 B–18. . . . . . . . . . . . . . . . . . . . . .

NHM–7
System Module & UI
PAMS Technical Documentation
Page 5
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System Module & UI PAMS Technical Documentation
Page 6 Issue 1 10/2001
Nokia Corporation
Transceiver NHM–7
Introduction
The NHM–7 is a dual band radio transceiver unit for the E–GSM900 and
GSM1800 networks. GSM power class is 4 and GSM1800 power class is
1. It is a true 3 V transceiver, with an internal antenna and vibra.
The NHM–7 phone includes integrated FM radio. Radio is used as a nor-
mal mono receiver. FM radio is highly integrated. Only few external com-
ponents are needed. Headset is used as an antenna for radio.
The transceiver has a full graphic display and the user interface is based
on a Jack style UI with two soft keys.
An internal antenna is used, there is no connection to an external anten-
na.
The transceiver has a low leakage tolerant earpiece and an omnidirec-
tional microphone, providing an excellent audio quality. The transceiver
supports a full rate, an enhanced full rate and a half rate speech decod-
ing.
An integrated IR link provides a connection between two NHM–7 trans-
ceivers or a transceiver and a PC (internal data), or a transceiver and a
printer.
The small SIM ( Subscriber Identity Module ) card is located under the
battery. SIM interface supports both 1.8V and 3V SIM cards.
Electrical Modules
The radio module consists of Radio Frequency (RF) and baseband (BB).
User Interface (UI) contains display, keyboard, IR link, vibra, HF/HS con-
nector and audio parts. UI is divided into radio PWB LA5 and UI PWB
LK5. FM radio is located on the main PWB.
The electrical part of the keyboard is located in separate UI PWB named
LK5. LK5 is connected to radio PWB through spring connectors.
The System blocks provide the MCU, DSP, external memory interface
and digital control functions in UPP ASIC (Universal Phone Processor).
Power supply circuitry, charging, audio processing and RF control hard-
ware are in UEM ASIC (Universal Energy Management).
The purpose of the RF block is to receive and demodulate the radio fre-
quency signal from the base station and to transmit a modulated RF sig-
nal to the base station.

NHM–7
System Module & UI
PAMS Technical Documentation
Page 7
Issue 1 10/2001 Nokia Corporation
Operation Modes
The transceiver has six different operation modes:
– power off mode – idle mode
– active mode – charge mode
– local mode – test mode
In the power off mode circuits are powered down and only sleep clock is
running.
In the idle mode only the circuits needed for power up are supplied.
In the active mode all the circuits are supplied with power although some
parts might be in the idle state part of the time.
The charge mode is effective in parallel with all previous modes. The
charge mode itself consists of two different states, i.e. the fast charge and
the maintenance mode.
The local and test modes are used for alignment and testing.
Interconnection Diagram
Module
Radio
LA5
Display
SIM Battery
Charger
Antenna
Earpiece
IR Link
MIC
Keyboard
module
HF
+
FM antenna

NHM–7
System Module & UI PAMS Technical Documentation
Page 8 Issue 1 10/2001
Nokia Corporation
System Module LA5
Baseband Module
The baseband architecture supports a power saving function called ”sleep
mode”. This sleep mode shuts off the VCTCXO, which is used as system
clock source for both RF and baseband. During the sleep mode the sys-
tem runs from a 32 kHz crystal. The phone is waken up by a timer run-
ning from this 32 kHz clock supply. The sleep time is determined by net-
work parameters. Sleep mode is entered when both the MCU and the
DSP are in standby mode and the normal VCTCXO clock is switched off.
NHM–7 supports both three and two wire type of Nokia chargers. Three
wire chargers are treated like two wire ones. There is not separate PWM
output for controlling charger but it is connected to GND inside the bottom
connector. Charging is controlled by UEM ASIC (Universal Energy Man-
agement) and EM SW running in the UPP (Universal Phone Processor).
BLB–2 Li–ion battery is used as main power source for the phone.
Block Diagram
UEM
UI
SIM
UPP
BATTERY
PA SUPPLY
RF SUPPLIES
BB SUPPLIES
TX/RX SIGNALS
BASEBAND
VBAT
EXT. AUDIO
IR
32kHz
CLK
13MHz
CLK
SLEEP CLOCK
SYSTEM CLOCK
HS–connector Charger
connector
RAM
FLASH MEMORY
FM
radio
Digital Control
PWR
UPP ASIC (Universal Phone Processor) provides the MCU, DSP, external
memory interface and digital control functions. UEM ASIC (Universal En-
ergy Management) contains power supply circuitry, charging, audio proc-
essing and RF control hardware.