Nokia 2190 Service Manual Trouble
Programmes After Market Services (PAMS)
Technical Documentation
NHB–3
TROUBLESHOOTING
INSTRUCTIONS
PAMS
Technical Documentation
AMENDMENT RECORD SHEET
NHB–3
Troubleshooting
Amendment
Number
Date Inserted By Comments
Original 26/97
Page 2
PAMS
Technical Documentation
NHB–3 TROUBLESHOOTING INSTRUCTIONS
Contents
Introduction 6
General 6
Baseband Troubleshooting 7
PWR Button Fault 8
Display Selftest Failed 9
No Registration to the System (no serv) 10
Audio Fault 11
Flash Programming ; part 2 13
Flash Programming ; part 3 14
Flash Programming ; part 4 15
Some BB measurements for reference 16
Power circuitry 17
Repairing Instructions for Flash Faulty Units 18
RF Tuning Fails 19
Calib Temperature Sensor 19
AFC Fails 19
RSSI Fails 19
TXI/TXQ Tuning 20
Power Measuring 20
Power Tuning 20
Calib BATT_VOLTAGE = 6.0 V 20
Calib CHARGE_VOLTAGE = 6.0 V 20
Repairing instructions for RF unit 21
Common features 21
Duplex filter 21
NHB–3 Receiver Functional Description 22
Front–end amplifier V501 22
RX–Filter Z505 22
First Mixer V511 22
First Local Buffer V512 22
IF–amplifier V521 22
IF–filter 23
Second Mixer V531 23
Second Local Buffer V532 23
If–amplifier V541 23
IF–filter Z541 23
AGC–amplifier 23
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Troubleshooting
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Technical Documentation
Third Mixer 23
Third IF–filter Z551 23
Third If amplifier 24
RX Signal levels and frequencies 24
Setting of PCLocals 24
Signal Levels at Front End 24
Signal Levels at IF (1) 24
Signal Levels at IF (2) 25
Signal Levels at IF (3) 25
TX Unit 26
Modulator circuit,TX–part of CRFRT ( N551 ) 26
Upconversion mixer ( V702 ) 26
TX interstage filters ( Z713 and Z727 ) 26
1st TX–buffer ( V710 ) 26
2nd TX–buffer ( V725 ) 27
3rd TX–buffer ( V736 ) 27
Power amplifier 27
Power control circuitry 27
TX signal levels and frequencies 28
Settings of PCLocals 28
Signal levels of UHF VCO buffer ( V701 ) 28
Signal levels of 1st amplifier 28
Signal levels of 2nd amplifier 28
Signal levels of 3rd amplifier 29
Signal levels of power amplifier 29
Synthesizer 30
Brief describtion of the synthesizer 30
Reference oscillator 30
UHF–part of PLL 30
VHF–part of PLL 30
Synthesizer Signal levels and frequencies 31
UHF Synthesizer Malfunction 31
Setting of PCLocals 31
Synthesizer locked ( Control voltage depends on channel) 31
Voltages of synthesizer N820 : 31
UHF VCO (G1) output: 31
Reference oscillator VCTCXO 32
VHF Synthesizer Malfunction 32
Voltage from Do IF 32
Voltages of N820 32
Biasing voltages on VHF 32
NHB–3
Troubleshooting
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Technical Documentation
Frequency 33
NHB–3
Troubleshooting
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Technical Documentation
Introduction
General
The purpose is to define fault block of the module and then find out the broken component. The trouble shooting diagram has been planned so that the fault, whatever
it is, can be found by as simple measurements as possible.
The flow diagrams give you the overview of the blocks. The purpose is that you
proceed through the flow diagram so that, if your answer is YES for the asked
question, go straight to the next level, but if your answer is NO, you have to go
the subbranch.
Required servicing equipment:
– PC for PC locals
– Power supply (2.0 A)
– Digital multimeter
NHB–3
Troubleshooting
– Oscilloscope
– Spectrum analyzer
– RF cables
– Modular cable
– RS232/MBUS adapter
– CMT/Marconi
– RF measuring chassis
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Page 6
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Technical Documentation
Baseband Troubleshooting
The following hints should facilitate finding the cause of the problem when the
circuitry seems to be faulty. This troubleshooting guide is divided into the following sections.
1. Power button fault
2. Display self test failed
3. No registration to the system
4. Audio fault
5. Flash programming; part 2
6. Flash programming; part 3
7. Flash programming; part 4
The first thing to do is to carry out a thorough visual check of the module. En-
sure in particular that:
NHB–3
Troubleshooting
a) there is not any mechnical damage
b) soldered joints are OK
Original 26/97
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Technical Documentation
PWR Button Fault
NHB–3
Troubleshooting
Phone does’nt start when
PWR button is pressed
Check
X100
NO
Change
FLEX
Check
X196
N271/PSL
pin 10 +5 V when
VBATT is connected
YES
N271/PSL
pin 10 +5–>0 V when
push PWR button
YES
R110, C113
OK?
Check components
around N271 if OK
change N271
NO
N271/PSL pins 5,2
VBATT voltage
YES
Change
N271
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Technical Documentation
Display Selftest Failed
NHB–3
Troubleshooting
Display selftest failed or
phone doesn’t registrate to
the system (tester)
Use PCLocals to
find out a reason
MCU internal test
MCU RAM bus test
MCU ROM bus test
MCU IMEI test
NO
MCU DSP code
download: failed,
DSP tests: no responce
RFI bus fault
NO
MCU audio codec
test: failed
YES
Codec N260/pin 12 : PCMDO
Codec N260/pin 13 : PCMDI
Codec N260/pin 19 : PCMCLK
Codec N260/pin 20 : XSELPCMC
YES
YES
Unprogrammed FLASH
Unconnected pins in MCU
address or data lines
DSP clock oscillator
DSP pin 45/INT1
DSP pin 10/ERAMHI
DSP pin 9/IOX
DSP pin 12/EROM
DSP pin 14/RWN
DSP pin 15/RWN
DSP pin 39/RSTB
RFI/RFIAD 3:0
RFI/RFIDA 11:0
RFI pin 49/RDX
RFI pin 50/WRX
RFI pin 53/RFICLK
RFI pin 59/RFI2CLK
DSP RAM D210, D211
DSP/DSPDA
DSP/DSPAD
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Technical Documentation
No Registration to the System (no serv)
No registration to the
system (no serv)
no call
Selftest OK
YES
DSP pin 43, 45 INT0, 1 (from ASIC)
RFI pins 1,63/RXI, RXQ
RFI pin 3/EXTBG (4.096 V)
RFI pin 4/VCM (2.35 V)
RFI pin 6/TXC (to RF)
RFI pins 8,9/TXQ+, TXQ– (to RF)
RFI pins 11,12/TXI+, TXI– (to RF)
RFI pin 14/AFC (to RF)
RFI pins 20...23,28,29/PDA TA 5:0
RFI pin 51/DAX (to ASIC)
ASIC/D230/pin 105/SYNTHPWR (to RF)
ASIC/D230/pin 104/TXP (to RF)
ASIC/D230/pin 106/TXPPWR (to RF)
ASIC/D230/pin 111/SENAT (to RF)
ASIC/D230/pin 112/SENAR (to RF)
ASIC/D230/pin 113/SDAT (to RF)
ASIC/D230/pin 114/SCLK (to RF)
NHB–3
Troubleshooting
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Technical Documentation
Audio Fault
Audio fault
Microphone or earphone
signal missing
Microphone and
earphone signal
Microphone signal
missing?
NO
missing?
YES
YES
NHB–3
Troubleshooting
CODEC pin 15/SYNC (from ASIC)
CODEC pin 16/CODEC_CLK (from ASIC)
DSP pins 79, 82/PCMCOSYCLKX (from ASIC)
DSP pins 60, 81/PCMDATRCLKX (from ASIC)
DSP pin 80/CODEC_CLK
CODEC N260/pins 22, 23 MICP, MICN
X196/pins 18, 19 MICP, MICN
CODEC N260/pin 10 PCMOUT
CODEC N260/pin 17 MICENA
X196/pin 12 MICENA
NO
Earphone signal
missing?
NO
Missing ringing tones
YES
YES
CODEC N260/pins 6, 7
X196/pins 20, 21
CODEC N260/pin 14/PCMIN
DSP D200/pin 78
MCU/D231/PIN79. NOTE! PWM SIGNAL
X196/PIN22
BUZZER JOINTINGS
CHANGE FLEX
Original 26/97
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