6(b) - RF Troubleshooting InstructionsNokia Customer Care
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Nokia Customer Care6(b) - RF Troubleshooting Instructions
Table of Contents
Page No
General Information on RF Troubleshooting.................................................................................... 5
Test environment ..................................................................................................................................5
Test conditions ......................................................................................................................................6
Receiver Verification and Troubleshooting ...................................................................................... 7
General instructions for RX troubleshooting ................................................................................7
Measuring RX I/Q signals using RSSI reading ..............................................................................7
Measuring RX performance using SNR measurement ............................................................ 9
Measuring front-end power levels using spectrum analyzer............................................. 10
Measuring analogue RX I/Q signals using oscilloscope....................................................... 11
Fault finding chart of the receiver ................................................................................................12
DC Supply Voltage Check ................................................................................................................... 43
Appendix 6A: Test Points..................................................................................................... 45
Receiver test points ...........................................................................................................................47
Transmitter test points ......................................................................................................................49
Synthesizer test points ......................................................................................................................52
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Nokia Customer Care6(b) - RF Troubleshooting Instructions
General Information on RF Troubleshooting
Notes:
Several bills of material (BOM): There are two different kinds of VCOs, VCTXOs, RF-PAs, SAW-filters and Antenna Switches (ASM) assembled. They may only be replaced with the same type as the
original component (from the same manufacturer).
Phoenix version: In this document there are example measurements being depicted with pictures of
AMS-Phoenix, version A 2004.06.1.69. In later versions pictures of menus and windows may look differently.
Layout version: The drawings of test points and component placement in this version of the document
are taken from build B4.0 layout (1cna_41). If you use the document for newer layout versions, make
sure to use the corresponding assembly and test point drawings.
Test environment
It is assumed, that the phones are disassembled and tested with a repair jig MJ-22R.
The following measurements have to be done for repairing the phone boards:
•RF measurements shall be done using a spectrum analyzer together with a highfrequency probe. Note that the signal will be significantly attenuated. Correct
attenuation can be checked using a “good” phone board for example.
•LF (low frequency) and DC measurements shall be carried out with an oscillo-
scope together with a 10:1 probe.
•For receiver measurements, a signal generator specified for frequencies up to
2000 MHz is required. The signal generator is connected to the antenna port of
the repair jig.
Most of the radio communication testers, like CMU200, can be used as a signal
generator, but make sure to have a continuous (CW) signal without modulation
for alignment purposes.
•Transmitter output level measurements shall be done with a power meter
which is connected to the antenna port of the repair jig.
Always make sure that the measurement set-up is calibrated when measuring RF parameters at the antenna port. Remember to put the correct losses of the module repair jig
and the connecting cable in Phoenix or in the set-up programs of the RF generators
when realigning the phone.
Apart from key-components described in this document, there are a lot of discrete components (resistors, inductors and capacitors) for which troubleshooting has to be done by
checking its proper soldering and complete assembly on the PWB. Capacitors and resistors can be checked by means of an ohm-meter, but be aware in-circuit measurements
should be evaluated carefully.
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Test conditions
Rx tuning of the 26 MHz reference oscillator (VCTCXO) is temperature sensitive
because of the estimations of <AFC_value> and <AFC_slope>. According to the Production Test Specification DCS02294-EN-0.5, the ambient temperature has to be within a
temperature range of 22°C to 28°C.
Most RF semiconductors are static discharge sensitive. ESD protection must be taken
into account during repair (ground straps and ESD soldering irons).
The RF ASIC Helgo is moisture sensitive. Therefore, the ASIC must be pre-baked prior
to soldering.
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Receiver Verification and Troubleshooting
General instructions for RX troubleshooting
Connect the phone to a PC, which has Phoenix Service Software and a dongle installed,
using either
•repair jig and DAU-9S (RS232) cable or
•repair jig and XCS-4 cable via FPS-8 Flash Box or
•DAU-9T cable (RS232).
Connect the phone to a power supply (DC voltage: 3.6V, max. current: 3A) and an RF signal generator. Switch the phone on.
Start Phoenix Service Software and open FBUS connection.
SelectScan ProductCtrl-R
and wait until the phone information (RH-37) is shown in the lower right corner of the
screen.
Follow the instructions below.
Measuring RX I/Q signals using RSSI reading
Start Phoenix Service Software and open FBUS connection.
SelectScan ProductCtrl-R
Wait until the phone information is shown in the lower right corner of the screen.
Set the operating mode to local mode
SelectTestingT
RF ControlsF
SelectBandGSM 900 or GSM1800 or GSM1900
Active unitRX
Operation modeBurst
RX/TX Channel37 or 700 or 661
SelectTestingT
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RSSI readingR
In the RSSI Reading window, the <measuring mode> shall be set on Sum vector and the
<reading mode> on Continuous.
The set up should now look like this:
(The example below shows a screen shot in GSM900!)
Make the following settings on your signal generator:
• – 80 dBm @ the antenna connector of the phone/ test jig
(remembering to compensate for the cable and jig attenuation).
Click on <Read now> in RSSI reading.
The resulting RSSI level shall be – 80 dBm +/– 0.5 dB in each band.
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Measuring RX performance using SNR measurement
Start Phoenix Service Software and open FBUS connection.
SelectScan ProductCtrl-R
Wait until the phone information is shown in the lower right corner of the screen.
Set operating mode to <local mode>.
SelectTestingT
RF ControlsF
SelectBandGSM 900 or GSM1800 or GSM1900
Active unitRX
Operation modeBurst
RX/TX Channel37 or 700 or 661
SelectTestingT
SNR MeasurementM
Select Measuring modeFast SNR (Radio Button)
Press Start
The window <Signal Measurement> pops up informing on frequency and power level of
the signal generator to be set. Follow the command <Turn ON the RF generator>.
Press <ok> and the window will close.
Read the SNR result from the window SNR Measurement. The value shall exceed:
•GSM 900: > 20 dB
•GSM 1800: > 18 dB
•GSM 1900: > 18 dB
The set up should now look like this:
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(The example below shows a screen shot in GSM900!)
Choose the remaining GSM bands and measure accordingly the procedure described
above.
Measuring front-end power levels using spectrum analyzer
Spectrum analyzer (SA) level values depend on the probe type and shall be verified by a
properly working phone sample. The levels that are given in this document are measured
with a resistive probe (50 Ohm semi-rigid cable).
Start Phoenix Service Software and open FBUS connection.
SelectScan ProductCtrl-R
Wait until the phone information is shown in the lower right corner of the screen.
Set <operating mode> to <local mode>.
SelectTestingT
RF ControlsF
SelectBandGSM 900 or GSM1800 or GSM1900
Active unitRX
Operation modeContinuous
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RX/TX Channel37 or 700 or 661
Please refer to the fault finding chart and Appendix for proper levels at different test
points.
Measuring analogue RX I/Q signals using oscilloscope
Measuring with an oscilloscope RX I and RX Q signals on the test points <RXI> respectively <RXQ> is recommended only if the RSSI reading does not provide enough information. Input level = -60dBm.
Start Phoenix Service Software and open FBUS connection.
SelectScan ProductCtrl-R
Wait until phone information is shown in the lower right corner of the screen.
Set operating mode to <local mode>.
SelectTestingT
RF ControlsF
Wait until the RF Controls window pops up.
SelectBandGSM 900 or GSM1800 or GSM1900
Active unitRX
Operation modecontinuous
RX/TX Channel37 or 700 or 661
AGC10
The following picture should be displayed on an oscilloscope's screen if the receiver is
working properly:
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Signal amplitude 1.40Vpp
DC offset≈ 1.28V as the offset is floating, switch to the operating mode
<Burst> in Phoenix and read the DC offset
Frequency67kHz
Fault finding chart of the receiver
During fault finding, the calibration procedure is used to find out, whether all bands are
affected (error in common part of the Rx chain) or only one band (error in a Rx part of
the failed band). Take care not to save calibration values to the phone memory, which are out of limits. Find the error first and repair it.
When a defective phone has been calibrated, a possible error in RX front-end might be
masked. In that case, one can get a reasonable RSSI reading, although the front-end
shows excessive losses. If it is not sure that incorrect re-calibration has been made, following steps shall be carried out:
•Check if AGC calibration is within limits.
•Check if SNR reading is o.k.
Use an oscilloscope to check levels of “RXI” and “RXQ”.
The RF ASIC generates only single ended I and Q signals (RXI, RXQ). As the A/D converter
in UEM requires two differential signals, an artificial mid voltage is generated from
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VrefRF02. The phone layout has dedicated test points for the analogue RX I and Q signals
(J512, J513).
The BB part is used to measure those signals by means of RSSI reading. This works only if
correct calibration has been carried out in production.
RSSIreading [dBm] = 20log(UBB/U
LSB
) - AGC
calibrated
In order to check the levels and frequencies of RF signals, the following probe can be
used (note that only the core lead contacts the test point, the shielding of the coaxial
cable does not contact GND during the measurement):
Connect this probe via a coaxial cable and a DC block to a spectrum analyzer. The DC block is important to protect the spectrum analyzer from DC levels, which superpose
the RF signal at several test points.
If both RX and TX path seem to be faulty, it has to be checked if the synthesizer is working.
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Phoenix:
Phone: local mode
Open
Signal Generator:
Phoenix:
Open
Check RSSI Level = -80dBm
Execute Rx Calibration in selected
band, refer to chapter 9.2.1
re calibration results within limits?
Make sure that
Synthesizer is working
Yes
All 3 bands
RF Controls
Active Unit: Rx
Op. Mode: Burst
Rx/Tx channel: default (mid)
Level: –80dBm
Frequency: calculated from
Phoenix + 67.71kHz
Continue measurement only when channel select filter calibration failed
Channel select filter fault finding
Receiver
Fault Finding Tree
part 10
Oscilloscope:
RF-BB filter signals ok?
TPs: CM_F_Q & CM_F_I
CM_DTOS_Q & CM_DTOS_I
Yes
Repair finished
No
Re-solder capacitor array C7523
Re-calibrate
Channel Select Filter
Calibration ok ?
NoYes
Change RF
ASIC (Helgo)
Make following tunings/calibrations
Tx power l evel tuning
x
Tx IQ tuning
x
xRx calibration
Rx Band Filter Response Calib.
x
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Transmitter
General instructions for TX troubleshooting
Connect the phone to a PC, which has Phoenix Service Software and a dongle installed,
using either
•repair jig and DAU-9S (RS232) cable or
•repair jig and XCS-4 cable via FPS-8 Flash Box or
•DAU-9T cable (RS232)
Connect the phone to a power supply (DC voltage of 3.6V) and switch the phone on. The
value of the DC voltage of 3.6V at the phone battery connector is crucial.
Connect an RF cable between the test jig and the measurement equipment (GSM test
equipment, power meter, spectrum analyzer, or similar).
Make use of an adequate attenuator at the input of your measurement equipment (10dB
to 20dB are recommended for a spectrum analyzer or a power meter). Additionally, a DC
block is recommended. Assure not to overload or destroy the equipment.
It is strongly recommended to use TXP as external trigger for all TX tunings. External triggering gives the following advantages:
•trigger for spectrum analyzer (gated sweep)
•trigger for oscilloscope
•trigger for power meter (avoid exchanging of attenuator and getting better accuracy in power measurements)
Start Phoenix Service Software and open FBUS connection:
SelectScan ProductCtrl-R
and wait until the phone information is shown in the lower right corner of the screen.
Follow the instructions in the chapters below.
GSM900 transmitter
The GSM900 chapters apply only for RH-37 (EU variant).
General instructions for GSM TX troubleshooting
Start the preparations as described in chapter “General instructions for TX troubleshooting”.
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GMSK
Set operating mode to local mode.
SelectTestingRF Controls
Wait until the RF Controls window pops up
SelectBandGSM 900
Active unitTX
Operation modeBurst
RX/TX Channel37
TX Power Level10
TX Data TypeRandom
EdgeOff
The setup should now look like this:
Now the measurement equipment should detect the following output signal of the
phone:
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P
= +23dBm @ 897.4 MHz
out
If this is not the case, go to the GMSK fault finding chart for the GSM900 transmitter.
EDGE
Set operating mode to local mode.
SelectTestingRF Controls
Wait until the RF Controls window pops up.
SelectBandGSM 900
Active unitTX
Operation modeBurst
RX/TX Channel37
TX Power Level10
TX Data TypeAll1
EdgeOn
The setup should now look like this:
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Now the measurement equipment should detect the following output signal of the
phone:
P
= +24.5 dBm @ 897.4 MHz
out
If this is not the case, go to the EDGE fault finding chart for GSM900 transmitter.
Fault finding chart for GSM900 transmitter
In the following, it is assumed that the TXP signal is used as trigger signal. For that, a
TXP test point is provided.
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GMSK
Use Phoenix to select
TX_Data Type: Random
TX Power Level: 10
Ch37
Ensure Vbatt=3.6 V
Yes
Oscilloscope
C7711
R7511
C7512
TXP testpoint
C7517
R7516
Yes
Oscilloscope
C7529
C7529
C7530
C7530
Yes
Oscilloscope
C7701
VC1
VC2
VC3
R7713
Yes
Spectrum analyzer No Check
Z7700 out, R7704 in RFin_850/
Compare with good
Yes Synthesizer
Mode
VREF01
VR2
TXP
VR5
VR3
TXIOUTP
Vdc = 1.35 Volt Check
Vdc = 2.78 Volt No Baseband
V = 1.8 Volt
Vdc = 2.78 Volt
Vdc = 2.78 Volt
V = 0 Volt
67kHz
No Check
Vac = 0.45 Vpp, Vdc =
1.2 V
TXIOUTN
67kHz
Baseband
Vac = 0.45 Vpp, Vdc =
1.2 V
TXQOUTP
67kHz
Vac = 0.45 Vpp, Vdc =
1.2 V
TXQOUTN
67kHz
Vac = 0.45 Vpp, Vdc =
1.2 V
VTXB_900
CONT1
CONT2
CONT3
VPCTRL_90
0
V = 2.78 Volt No Check:
V = 0 Volt Helgo Serial Interface
V = 0 Volt Helgo
V = 2.7 Volt
V = 1.17 Volt
P>= 2 dBm, 897.4MHz EGSM TX SAW Filter
900
Helgo
sample
Spectrum analyzer Check PA N7700
Z7800 TX1 (PA N7700
RFOut_850/900)
Power = +24.3 dBm,
No Check Power Loop
(TXC, Vpctrl900, DET)
897.4 MHz
Yes
Spectrum analyzer Check
RF@Test-Jig No
Pout
Antenna Switch (Z7800)
= +23 dBm, 897.4 MHz
Yes
GSM900 TX
OK
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EDGE
Ensure that GMSK is ok.
Use Phoenix to select
TX_Data Type: All 1
EDGE: On
TX Power Level: 10
Ch37
Ensure Vbatt=3.6 V
Yes
Oscilloscope
C7702
C7711
VPCTRL_900
Yes
Spectrum analyzer Check PA N7700
RF@Test-Jig No Check Power Loop
Pout
= +24.5 dBm, 897.4MHz
Yes
GSM900 TX
OK
IREF01
Mode
R7713
(TXC,Rfin 900, DET)
V ~ 1.77 Volt Check
V = 1.8 Volt No Baseband
V= 2.7 V
GSM1800 transmitter
General instructions for GSM1800 TX troubleshooting
Start the preparations as described in chapter “General instructions for TX troubleshooting”.
GMSK
Set operating mode to local mode.
SelectTestingRF Controls
Wait until the RF Controls window pops up
SelectBandGSM 1800
Active unitTX
Operation modeBurst
RX/TX Channel700
TX Power Level5
TX Data TypeRandom
Edge Off
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The setup should now look like this:
EDGE
Now the measurement equipment should detect the following output signal of the
phone:
P
= +23dBm @ 1747.8 MHz
out
If this is not the case, then go to the GMSK fault finding chart for GSM1800 transmitter.
Set operating mode to local mode.
Select TestingRF Controls
Wait until the RF controls window pops up.
Select BandGSM 1800
Active unitTX
Operation modeBurst
RX/TX Channel700
TX Power Level5
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TX Data TypeAll 1
EdgeOn
The setup should now look like this:
Now the measurement equipment should detect the following output signal of the
phone:
P
= +21.5 dBm @ 1747.8 MHz
out
If this is not the case, then go to the EDGE fault finding chart for GSM1800 transmitter.
Fault finding chart for GSM1800 transmitter
In the following, it is assumed that the TXP signal is used as trigger signal. For that, a
TXP test point is provided.
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GMSK
TX_Data Type: Random
TX Power Level: 5
Ch700
Ensure Vbatt=3.6 V
Yes
Oscilloscope
C7711
R7511
C7512
TXP testpoint
C7517
R7516
Yes
Oscilloscope
C7529
C7529
C7530
C7530
Yes
Oscilloscope
C7709
VC1
VC2
VC3
R7715
Yes
Spectrum analyzer No Check
T7700 out, R7709 in RFin_180
Compare with good
Yes Synthesizer
Spectrum analyzer Check PA N7700
Z7800 TX2 (PA N7700
RFOut_1800/1900)
Power = +21.6 dBm,
1747.8 MHz
Yes
Spectrum analyzer Check
RF@Test-Jig No
Pout
= +20 dBm, 1747.8 MHz
Yes
GSM 1800 TX
OK
Mode
VREF01
VR2
TXP
VR5
VR3
TXIOUTP
Vdc = 1.35 Volt Check
Vdc = 2.78 Volt No Baseband
V = 1.8 Volt
Vdc = 2.78 Volt
Vdc = 2.78 Volt
Vac = 0.4 Vpp, Vdc =
V = 0 Volt
No Check
1.2 V
TXIOUTN
Vac = 0.4 Vpp, Vdc =
Baseband
1.2 V
TXQOUTP
Vac = 0.4 Vpp, Vdc =
1.2 V
TXQOUTN
Vac = 0.4 Vpp, Vdc =
1.2 V
VTXB_1800
_1900
CONT1
CONT2
CONT3
VPCTRL_18
00_1900
V = 2.7 Volt No Check
V = 2.7 Volt Helgo Serial Interface
V = 2.7 Volt Helgo
V = 0 Volt
V > 1.14 Volt
P> 2 dBm, 1747.8MHz T7700 Balun
0/1900
Helgo
sample
No Check Power Loop
(TXC, Vpctrl 1800 1900,
DET)
Antenna Switch (Z7800)
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EDGE
Ensure that GMSK is ok.
Use Phoenix to select
TX_Data Type: All 1
EDGE: On
TX Power Level: 5
Ch700
Ensure Vbatt=3.6 V
Yes
Oscilloscope
C7702
C7711
VPCTRL_900
Yes
Spectrum analyzer Check PA N7700
RF@Test-Jig No Check Power Loop
Pout
= +21.5 dBm, 1747.8
MHz
Yes
GSM 1800 TX
OK
IREF_900
Mode
R7715
(TXC, RFin 1800 1900,
V = 1.83 Volt Check
V = 1.8 Volt No Baseband
Vdc= 2.7 V
DET)
GSM1900 transmitter
General instructions for GSM1900 TX troubleshooting
Start the preparations as described in chapter “General instructions for TX troubleshooting”.
GMSK
Set operating mode to local mode.
SelectTestingRF Controls
Wait until the RF Controls window pops up.
SelectBandGSM 1900
Active unitTX
Operation modeBurst
RX/TX Channel661
TX Power Level5
TX Data TypeRandom
EdgeOff
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The setup should now look like this:
EDGE
Now the measurement equipment should detect the following output signal of the
phone:
P
= +23dBm @ 1880 MHz
out
If this is not the case, then go to the GMSK fault finding chart for GSM1900 transmitter.
Set operating mode to local mode.
SelectTestingRF Controls
Wait until the RF Controls window pops up.
SelectBandGSM 1900
Active unitTX
Operation modeBurst
RX/TX Channel661
TX Power Level5
TX Data TypeAll1
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EdgeOn
The setup should now look like this:
Now the measurement equipment should detect the following output signal of the
phone:
= +21.5 dBm @ 1880 MHz
P
out
If this is not the case, then go to the EDGE fault finding chart for GSM1900 transmitter.
Fault finding chart for GSM1900 transmitter
In the following, it is assumed that the TXP signal is used as trigger signal. For that, a
TXP test point is provided.
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GMSK
Use Phoenix to select
TX_Data Type: Random
TX Power Level: 5
Ch661
Ensure Vbatt=3.6 V
Yes
Oscilloscope
C7711
R7511
C7512
TXP testpoint
C7517
R7516
Yes
Oscilloscope
C7529
C7529
C7530
C7530
Yes
Oscilloscope
C7709
VC1
VC2
VC3
R7715
Yes
Spectrum analyzer No Check
T7700 out, R7709 in RFin_180
Compare with good
Yes Synthesizer
Spectrum analyzer Check PA N7700
Z7800 TX2 (PA N7700
RFOut_1800/1900)
Power = +21.6 dBm, 1880
MHz
Yes
Spectrum analyzer Check
RF@Test-Jig No
Pout
= +20 dBm, 1880 MHz
Yes
GSM 1900 TX
OK
Mode
VREF01
VR2
TXP
VR5
VR3
TXIOUTP
Vdc = 1.35 Volt Check
Vdc = 2.78 Volt No Baseband
V = 1.8 Volt
Vdc = 2.78 Volt
Vdc = 2.78 Volt
Vac = 0.4 Vpp, Vdc =
Vdc = 0 Volt
No Check
1.2 V
TXIOUTN
Vac = 0.4 Vpp, Vdc =
Baseband
1.2 V
TXQOUTP
Vac = 0.4 Vpp, Vdc =
1.2 V
TXQOUTN
Vac = 0.4 Vpp, Vdc =
1.2 V
VTXB_1800
_1900
CONT1
CONT2
CONT3
VPCTRL_18
00_1900
V = 2.78 Volt No Check
V = 2.7 Volt Helgo Serial Interface
V = 2.7 Volt Helgo
V = 0 Volt
V = 1.12 Volt
P> 2 dBm, 1880 MHz T7700 Balun
0/1900
Helgo
sample
No Check Power Loop
(TXC Vpctrl 1800 1900,
DET)
Antenna Switch (Z7800)
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EDGE
Ensure that GMSK is ok.
Use Phoenix to select
TX_Data Type: All 1
EDGE: On
TX Power Level: 5
Ch661
Ensure Vbatt=3.6 V
Yes
Oscilloscope
C7702
C7711
VPCTRL_1800 1900
Yes
Spectrum analyzer Check PA N7700
RF@Test-Jig No Check Power Loop
Pout
= +21.5 dBm, 1880 MHz
Yes
GSM 1900 TX
OK
IREF_900
Mode
R7715
(TXC, RFin 1800 1900,
V = 1.83 Volt Check
V = 2.78 Volt No Baseband
V= 2.7 V
DET)
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Synthesizer
General instructions for synthesizer troubleshooting
Connect the phone to a PC, which has Phoenix Service Software and a dongle installed,
using either
•repair jig and DAU-9S (RS232) cable or
•repair jig and XCS-4 cable via FPS-8 Flash Box or
•DAU-9T cable (RS232).
Connect the phone to a power supply (DC voltage of 3.6V) and switch the phone on.
Follow the instructions in the chapters below.
Checking synthesizer operation
Start Phoenix Service Software and open FBUS connection.
Select “Scan Product” (Ctrl-R or in menu File - Scan Product).
Wait until phone information is shown in the lower right corner of the screen.
Set <operating mode> to <Local>.
Open window “RF Controls” (menu Testing - RF Controls)
Set the synthesizer to the following mode:
SelectBandGSM 1800
Active unitRX
Operation modeContinuous
RX/TX Channel700
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The setup should now look like this:
The VCO chamber has a fixed shielding lid, which can only be opened by destroying it. To
enable measurements with a closed lid, holes are located at positions where the supply
voltage VR7, the tuning voltage Vc and the output frequency f
Figure 1: Test holes in the VCO chamber
Tuning voltage
Vc @ C7503
Output frequency
f
@ R7503
VCO
VCO supply voltage
VR7 @ C7500
can be measured.
VCO
The VCO frequency has to be measured with a special probe, which fits into the holes of
the shielding lid. A thin coax cable can be used for this purpose, where the outer conductor is removed for 2mm. The isolation and the inner conductor must fit into the hole of
the shielding lid and provide a capacitive coupling to the attenuator R7503 at the VCO
output. A spectrum analyzer is used to display the frequency.
Page 34Nokia CorporationIssue 1 07/04
RH-37
Nokia Customer Care6(b) - RF Troubleshooting Instructions
Figure 2: VCO probe
The VCO frequency is twice the Rx frequency in the GSM1800 band:
f
= 2 * fRX = 2 * 1842.8 MHz = 3685.6 MHz
VCO
The tuning voltage can be easily measured at the Vc input of the VCO. The corresponding
hole in the shielding lid enables the voltage measurement at C7503, which shows the
same DC voltage as Vc.
The tuning voltage should be 2.1VDC .. 2.6VDC at f
= 3685.6MHz.
VCO
The tuning sensitivity of the VCO is typically 250MHz/V. The typical relation of VCO frequency and tuning voltage is shown in the following diagram:
Figure 3: Typical frequency tuning curve for the FDK VCO
6(b) - RF Troubleshooting InstructionsNokia Customer Care
Even if the PLL is not working properly (Vc outside the valid range), a frequency at the
output of the VCO can be detected between 3GHz and 4.4 GHz (if the VCO itself is ok and
the supply voltage VR7 = 2.78V is applied).
If the frequency or the tuning voltage have other values than given above, see the fault
finding chart for PLL syntesizer below.
Fault finding chart for PLL synthesizer
Figure 4: PLL Fault Finding Tree
Phoenix:
Phone is responding to Phoenix commands. For example,
Ctrl-R reads the right phone information.
No
Yes
Baseband part is not working,
possible reason: 26MHz missing.
Oscilloscope
VCTCXO output at G7501
26MHz,app.0.8Vpp
No
Oscilloscope:
Check VCTCXO supply
(VR3=2.78V, this can be checked after
power on for a time of about
fter that time the voltage is going
down.)
Yes
Oscilloscope
REFCLK output of N7500:
Signal VCTCXO=RFCLK_I
at C2902, R2902.
26MHz,app.0.8Vpp
.
32sec
Yes
No
Yes
No
Synthesizer
Fault Finding Tree
part 1
Check Baseband part for errors
Check supply filter components:
R7519, C7522, VDIG at N7500
Check C2902, R2902 and N7500.
Check UEM and Software.
It is important to note that the power supply VR3 of the VCTCXO is only switched off in
the so called ‘Deep Sleep Mode’ and the power supply VR7 of the VCO (G7500) is
switched off in so called ‘Sleep Mode’.
Issue 1 07/04Nokia CorporationPage 37
RH-37
6(b) - RF Troubleshooting InstructionsNokia Customer Care
6(b) - RF Troubleshooting InstructionsNokia Customer Care
571
1862.0 1942.0 3724.0 3884.0
572
1862.2 1942.2 3724.4 3884.4
573
1862.4 1942.4 3724.8 3884.8
574
1862.6 1942.6 3725.2 3885.2
575
1862.8 1942.8 3725.6 3885.6
576
1863.0 1943.0 3726.0 3886.0
577
1863.2 1943.2 3726.4 3886.4
578
1863.4 1943.4 3726.8 3886.8
579
1863.6 1943.6 3727.2 3887.2
580
1863.8 1943.8 3727.6 3887.6
581
1864.0 1944.0 3728.0 3888.0
582
1864.2 1944.2 3728.4 3888.4
583
1864.4 1944.4 3728.8 3888.8
584
1864.6 1944.6 3729.2 3889.2
585
1864.8 1944.8 3729.6 3889.6
586
1865.0 1945.0 3730.0 3890.0
587
1865.2 1945.2 3730.4 3890.4
588
1865.4 1945.4 3730.8 3890.8
589
1865.6 1945.6 3731.2 3891.2
590
1865.8 1945.8 3731.6 3891.6
591
1866.0 1946.0 3732.0 3892.0
592
1866.2 1946.2 3732.4 3892.4
593
1866.4 1946.4 3732.8 3892.8
594
1866.6 1946.6 3733.2 3893.2
595
1866.8 1946.8 3733.6 3893.6
596
1867.0 1947.0 3734.0 3894.0
597
1867.2 1947.2 3734.4 3894.4
598
1867.4 1947.4 3734.8 3894.8
599
1867.6 1947.6 3735.2 3895.2
600
1867.8 1947.8 3735.6 3895.6
601
1868.0 1948.0 3736.0 3896.0
602
1868.2 1948.2 3736.4 3896.4
603
1868.4 1948.4 3736.8 3896.8
604
1868.6 1948.6 3737.2 3897.2
605
1868.8 1948.8 3737.6 3897.6
665
1880.8 1960.8 3761.6 3921.6
666
1881.0 1961.0 3762.0 3922.0
667
1881.2 1961.2 3762.4 3922.4
668
1881.4 1961.4 3762.8 3922.8
669
1881.6 1961.6 3763.2 3923.2
670
1881.8 1961.8 3763.6 3923.6
671
1882.0 1962.0 3764.0 3924.0
672
1882.2 1962.2 3764.4 3924.4
673
1882.4 1962.4 3764.8 3924.8
674
1882.6 1962.6 3765.2 3925.2
675
1882.8 1962.8 3765.6 3925.6
676
1883.0 1963.0 3766.0 3926.0
677
1883.2 1963.2 3766.4 3926.4
678
1883.4 1963.4 3766.8 3926.8
679
1883.6 1963.6 3767.2 3927.2
680
1883.8 1963.8 3767.6 3927.6
681
1884.0 1964.0 3768.0 3928.0
682
1884.2 1964.2 3768.4 3928.4
683
1884.4 1964.4 3768.8 3928.8
684
1884.6 1964.6 3769.2 3929.2
685
1884.8 1964.8 3769.6 3929.6
686
1885.0 1965.0 3770.0 3930.0
687
1885.2 1965.2 3770.4 3930.4
688
1885.4 1965.4 3770.8 3930.8
689
1885.6 1965.6 3771.2 3931.2
690
1885.8 1965.8 3771.6 3931.6
691
1886.0 1966.0 3772.0 3932.0
692
1886.2 1966.2 3772.4 3932.4
693
1886.4 1966.4 3772.8 3932.8
694
1886.6 1966.6 3773.2 3933.2
695
1886.8 1966.8 3773.6 3933.6
696
1887.0 1967.0 3774.0 3934.0
697
1887.2 1967.2 3774.4 3934.4
698
1887.4 1967.4 3774.8 3934.8
699
1887.6 1967.6 3775.2 3935.2
759
1899.6 1979.6 3799.2 3959.2
760
1899.8 1979.8 3799.6 3959.6
761
1900.0 1980.0 3800.0 3960.0
762
1900.2 1980.2 3800.4 3960.4
763
1900.4 1980.4 3800.8 3960.8
764
1900.6 1980.6 3801.2 3961.2
765
1900.8 1980.8 3801.6 3961.6
766
1901.0 1981.0 3802.0 3962.0
767
1901.2 1981.2 3802.4 3962.4
768
1901.4 1981.4 3802.8 3962.8
769
1901.6 1981.6 3803.2 3963.2
770
1901.8 1981.8 3803.6 3963.6
771
1902.0 1982.0 3804.0 3964.0
772
1902.2 1982.2 3804.4 3964.4
773
1902.4 1982.4 3804.8 3964.8
774
1902.6 1982.6 3805.2 3965.2
775
1902.8 1982.8 3805.6 3965.6
776
1903.0 1983.0 3806.0 3966.0
777
1903.2 1983.2 3806.4 3966.4
778
1903.4 1983.4 3806.8 3966.8
779
1903.6 1983.6 3807.2 3967.2
780
1903.8 1983.8 3807.6 3967.6
781
1904.0 1984.0 3808.0 3968.0
782
1904.2 1984.2 3808.4 3968.4
783
1904.4 1984.4 3808.8 3968.8
784
1904.6 1984.6 3809.2 3969.2
785
1904.8 1984.8 3809.6 3969.6
786
1905.0 1985.0 3810.0 3970.0
787
1905.2 1985.2 3810.4 3970.4
788
1905.4 1985.4 3810.8 3970.8
789
1905.6 1985.6 3811.2 3971.2
790
1905.8 1985.8 3811.6 3971.6
791
1906.0 1986.0 3812.0 3972.0
792
1906.2 1986.2 3812.4 3972.4
793
1906.4 1986.4 3812.8 3972.8
Page 42Nokia CorporationIssue 1 07/04
RH-37
Nokia Customer Care6(b) - RF Troubleshooting Instructions
DC Supply Voltage Check
For a quick check of DC power supplies, refer to the diagram below. The RF power supplies are generated in the UEM and can be measured either in the Small Signal Chamber
or in the Base Band Chamber.
The UEM output voltages can be measured at the respective resistors' / capacitors' pads
marked below in brackets, e.g. < C1234 >.
UEM
< C7516 >
< C7510 >
< R7516 >
< C7519 >
< C7517 >
VR1
VR2
VR3
VR4
VR5
4.75 V [ 4.6V ... 4.9V ]
charge pump (VCP)
2.78 V [ 2.70V ... 2.86V ]
Tx modulator (Vcc_ModOut)
TX buffer & EDGE ALCs (VRF_TX)
2.78 V [ 2.70V ... 2.86V ]
VCTCXO (+VCC)
digital interface (VDIG)
2.78 V [ 2.70V ... 2.86V ]
Rx Front End (VRF_RX)
Bias & Rx CH filters (VF_RX)
RF controls (VPAB_VLNA)
2.78 V [ 2.70V ... 2.86V ]
PLL prescaler (VPRE)
phasing dividers of Rx (VLO)
< C7521 >
< C7500 >
< R7511/C7516 >
< R2901/C2901 >
AND
VR6
VR7
V
refRF01
V
refRF02
2.78 V [ 2.70V ... 2.86V ]
2.78 V [ 2.70V ... 2.86V ]
16 mA [max. 20 mA]
1.35 V [ 1.32V ... 1.38V ]
100 uA
1.35 V [ 1.32V ... 1.38V ]
100 uA
BB buffer (VDIG)
VCO (VCC_VCO)
bias reference (VB_EXT)
bias reference
(RXIINN, RXQINN)
< R2900/C2900 >
VBAT
2.7 V [ 2.95V ... 4.7V ]
Triple band PA
Issue 1 07/04Nokia CorporationPage 43
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Page 44Nokia CorporationIssue 1 07/04
Nokia Customer Care
RH-37 Series Transceivers
Appendix 6A: Test Points
Issue 1 07/04Nokia Corporation
RH-37
Appnedix 6A: Test PointsNokia Customer Care
Receiver test points
B u r s t
V R 6
C o n t i n u o u s
o r
L N A B _ P *
T e s t p o i n t
B a n d G S M 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e
R X / T X C h a n n e l 3 7
D C L e v e l 2 . 8 V
T e s t p o i n t
B a n d G S M 1 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 6 6 1
B u r s t
V R 4
C o n t i n u o u s
T e s t p o i n t
B a n d G S M 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e
R x 3
T e s t p o i n t
B a n d G S M 1 9 0 0
L N A _ P *
o r
T e s t p o i n t
B a n d G S M 1 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 3 7
D C L e v e l 2 . 8 V
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 6 6 1
A G C 1 4
R X / T X C h a n n e l 6 6 1
2 . 5 d B
P r e f
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 1 9 6 0 . 0 6 7 7 1 M H z
P r o b e d P o w e r
T y p .
2 . 5 V
A G C : 1 4
D C L e v e l
T y p .
1 . 8 V
0 V
A G C : 4
D C L e v e l
A G C : 5
D C L e v e l
B u r s t
V r e f R F 0 1 *
C o n t i n u o u s o r
T e s t p o i n t
B a n d G S M 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e
R X / T X C h a n n e l 3 7
D C L e v e l 1 . 3 5 V
1 ) V r e f R F 0 2 *
T e s t p o i n t s
B u r s t
C o n t i n u o u s o r
2 ) V r e f R F 0 2 * *
B a n d G S M 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e
R X / T X C h a n n e l 3 7
D C L e v e l 1 . 3 5 V
O U T - Z 7 8 0 1
T e s t p o i n t
B a n d G S M 1 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 6 6 1
O U T - V 7 8 0 0
T e s t p o i n t
B a n d G S M 1 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 6 6 1
V r e f R F 0 2 *
R 2 9 0 1 / C 2 9 0 1
V r e f R F 0 2 * *
R 2 9 0 0 / C 2 9 0 0
1 ) I N P _ P _ R X
2 ) I N M _ P _ R X
P r e f - 3 . 5 d B
A G C 1 4
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 1 9 6 0 . 0 6 7 7 1 M H z
P r o b e d P o w e r
P r e f + 1 4 d B
A G C 1 4
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 1 9 6 0 . 0 6 7 7 1 M H z
P r o b e d P o w e r
P r e f - 6 . 5 d B
2 . 0 d B
R x 2
T e s t p o i n t
B a n d G S M 1 8 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 7 0 0
R x 1
T e s t p o i n t
B a n d G S M 8 5 0 / 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 3 7
P r e f
A G C 1 4
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 1 8 4 2 . 8 6 7 7 1 M H z
P r o b e d P o w e r
1 . 5 . 0 d B
P r e f
A G C 1 4
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 9 4 2 . 4 6 7 7 1 M H z
P r o b e d P o w e r
L a y o u t : 1 c n a _ 4 1 ( B u i l d 4 . 0 )
t y p . 6 3 d B m
P r e f ( d B m )
t y p . 6 3 d B m
P r e f ( d B m )
t y p . 6 3 d B m
A N T ( A n t e n n a F e e d )
ReceiverTestPoints(1/2)
T e s t p o i n t
B a n d G S M 9 0 0 G S M 1 8 0 0 G S M 1 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 3 7 7 0 0 6 6 1
P r e f ( d B m )
w i t h
A G C 1 4
I n p u t P o w e r 6 0 d B m 6 0 d B m 6 0 d B m
I n p u t F r e q u e n c y 9 4 2 . 4 6 7 7 1 M H z 1 8 4 2 . 8 6 7 7 1 M H z 1 9 6 0 . 0 6 7 7 1 M H z
P r o b e d P o w e r
( e . g . m e a s u r e d
r e s i s t i v e p r o b e , r e f . t o
L 7 8 0 7 / C 7 8 0 6
I N M _ P _ R X
L 7 8 0 7 / C 7 8 0 5
I N P _ P _ R X
L 7 8 0 3
I N P _ D _ R X
L 7 8 0 2
I N M _ D _ R X
L 7 8 0 5
L N A B _ P *
R 7 8 0 1 / C 7 8 0 3
V C 3
V A N T _ 1
V C 1
V A N T _ 2
V C 2
V A N T _ 3
I N M _ G _ R X
L 7 8 0 4
I N P _ G _ R X
L 7 8 0 0 / C 7 8 0 1
O U T - Z 7 8 0 1
V R 6
V R 4
c h a p t e r 5 . 2 )
C 7 5 2 1
C 7 5 1 9
V r e f R F 0 1 *
R 7 5 1 1 / C 7 5 2 4
O U T - V 7 8 0 0
L 7 8 0 1 / C 7 8 0 4 / R 7 8 0 2
R x 3
L N A _ P *
R 7 8 0 0 / C 7 8 0 0
V A N T _ 1 , 2 , 3
T e s t p o i n t
R x 2
( G S M 1 9 0 0 )
( G S M 1 8 0 0 )
( V C 3 )
V A N T _ 3
( V C 1 )
V A N T _ 2
( V C 3 )
V A N T _ 1
B a n d G S M 9 0 0
A c t i v e U n i t R X [ T X ]
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 3 7
T e s t p o i n t s
A N T
R x 1
( G S M 8 5 0 / 9 0 0 )
V A N T _ 1 , 2 , 3
T e s t p o i n t
B a n d G S M 1 8 0 0
D C L e v e l 0 V [ 2 . 6 V ] 0 V [ 0 V ] 0 V [ 2 . 6 V ]
A c t i v e U n i t R X [ T X ]
T e s t p o i n t s
B a n d G S M 1 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 6 6 1
A G C 1 4
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 1 9 6 0 . 0 6 7 7 1 M H z
P r o b e d P o w e r
D C L e v e l 1 . 6 V
1 ) I N P _ D _ R X
2 ) I N M _ D _ R X
T e s t p o i n t s
B a n d G S M 1 8 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 7 0 0
G N D
a n d p i n s
( G R O U N D )
m e t a l s h i e l d i n g
1 ) I N P _ G _ R X
2 ) I N M _ G _ R X
T e s t p o i n t s
B a n d G S M 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 3 7
( V C 3 )
V A N T _ 3
( V C 1 )
V A N T _ 2
V A N T _ 1
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 7 0 0
T e s t p o i n t s
V A N T _ 1 , 2 , 3
( V C 3 )
D C L e v e l 0 V [ 0 V ] 0 V [ 2 . 6 V ] 0 V [ 2 . 6 V ]
T e s t p o i n t
B a n d G S M 1 9 0 0
P r e f 6 d B
A G C 1 4
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 1 8 4 2 . 8 6 7 7 1 M H z
P r o b e d P o w e r
D C L e v e l T y p . 1 . 6 V
P r e f 3 . 5 d B
A G C 1 4
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 9 4 2 . 4 6 7 7 1 M H z
P r o b e d P o w e r
D C L e v e l T y p . 1 . 6 V
( V C 3 )
V A N T _ 3
( V C 1 )
V A N T _ 2
( V C 3 )
V A N T _ 1
A c t i v e U n i t R X [ T X ]
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 6 6 1
T e s t p o i n t s
D C L e v e l 0 V [ 0 V ] 0 V [ 2 . 6 V ] 2 . 6 V [ 2 . 6 V ]
Page 46Nokia CorporationIssue 1 07/04
RH-37
R
i
T
P
i
(2/2)
Nokia Customer CareAppnedix 6A: Test Points
R X I
J 1 0 0 5
R X Q
J 1 0 0 4
1 ) R X I
2 ) R X Q
T e s t p o i n t s
B a n d G S M 9 0 0 o r G S M 1 8 0 0 o r G S M 1 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 3 7 o r 7 0 0 o r 6 6 1
C 7 5 2 3
C M _ D T O S _ I
C 7 5 2 3
C M _ D T O S _ Q
C 7 5 2 3
C M _ F _ I
C 7 5 2 3
C M _ F _ Q
1 ) C M _ F _ I
2 ) C M _ F _ Q
T e s t p o i n t s
B a n d G S M 9 0 0 o r G S M 1 8 0 0 o r G S M 1 9 0 0
A c t i v e U n i t R X
A N T
1 . 4 V p p
A G C 1 0
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 9 4 2 . 4 6 7 7 1 , 1 8 4 2 . 8 6 7 7 1 o r 1 9 6 0 . 0 6 7 7 1 M H z
S i g n a l
A m p l i t u d e
D C O f f s e t 1 . 2 8 V d c
F r e q u e n c y 6 7 k H z
G r a p h
( t y p i c a l f o r a l l
T P s a n d b a n d s )
A p p r o x . 1 . 7 5 V p p
O p e r a t i o n M o d e B u r s t
R X / T X C h a n n e l 3 7 o r 7 0 0 o r 6 6 1
A G C 1 0
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 9 4 2 . 4 6 7 7 1 , 1 8 4 2 . 8 6 7 7 1 o r 1 9 6 0 . 0 6 7 7 1 M H z
S i g n a l
A m p l i t u d e
G r a p h
( t y p i c a l f o r b o t h
T P s a n d a l l
b a n d s )
n t s
o
1 ) C M _ D T O S _ I
e s t
2 ) C M _ D T O S _ Q
A p p r o x . 2 V p p
v e r
T e s t p o i n t s
B a n d G S M 9 0 0 o r G S M 1 8 0 0 o r G S M 1 9 0 0
A c t i v e U n i t R X
O p e r a t i o n M o d e B u r s t
R X / T X C h a n n e l 3 7 o r 7 0 0 o r 6 6 1
A G C 1 4
I n p u t P o w e r 6 0 d B m
I n p u t F r e q u e n c y 9 4 2 . 4 6 7 7 1 , 1 8 4 2 . 8 6 7 7 1 o r 1 9 6 0 . 0 6 7 7 1 M H z
S i g n a l
A m p l i t u d e
G r a p h
( t y p i c a l f o r b o t h
T P s a n d a l l
b a n d s )
e c e
Issue 1 07/04Nokia CorporationPage 47
RH-37
Appnedix 6A: Test PointsNokia Customer Care
Transmitter test points
VR3
Testpoint
Band GSM900
Active Unit TX
Operation Mode Burst
RX/TX Channel 37
DC Level 2.8V
GMSK ( EDGE = OFF ) 8-PSK ( EDGE = ON )
Burst Burst
Modulation
Band GSM 850 or 90 0 or 1800 or 1900 GSM 850 or 900 or 1800 or 1900
Active Unit TX TX
Operation
Mode
Test point TXC TXC
Graph
e.g.
GSM900 PL10
TXIP (R713/1)
TXIM (R713/3)
TXIP (R713/7)
TXQM (R713/5))
Testpoints
Band GSM 850 or 900 or GSM1800 or GSM1900
Active Unit TX
Operation Mode Burst
RX/TX Channel 190 or 37 or 700 o r 661
Tx Data Type Random
Tx Power Level any
Tx2
Tx1
Rx3
Transmitter Test Points (1/3)
Rx2
Rx1
_1
VANT
Test points: RFout_900 and RFout_1800/1900
Matrix Antenna Switch Module Z7800
_3
VANT
_2
VANT
RFout
RFout
520mVpp
Signal
Amplitude
/1900
_1800
_900
VC3
VC2
VC1
[Volt]
Test point VTXB_900 VTXB_900
Graph e.g.
GSM900 PL10
Test point VPctrl_9 00 VPctrl_900
Graph
e.g.
GSM900 PL10
Test point VDET
VREF01
Testpoint
Band GSM900
Active Unit TX
Operation Mode Burst
RX/TX Channel 37
DC Level 1.35V
Layout: 1cna_41 (Build 4.0)
TXA
VPCTRL_1800_1900
VBAT
DC Offset 1.2Vdc
Graph
(typical for all
TPs and bands)
Tx
1800
GSM
/1900
Tx
850
/900
GSM
Rx
1900
GSM
X
Rx
1800
GSM
Rx
850
/900
GSM
[Volt]
[Volt]
0 0 0 X
0 0 0
VR2 (C7512)
X
X
X
Testpoint
Band GSM900/1800/1900
VBAT
0 2.6 2.6
0 2.6 0
2.6 2.6 0
Testpoint
Band GSM900
Active Unit TX
Active Unit TX
Operation Mode Burst
RX/TX Channel 37
DC Level 2.8V
Operation Mode Burst
RX/TX Channel 37
DC Level Typ. 3.6V
RFin_1800_1900
VTXB_1800_1900
VTXB_900
VR3
RFin_900 P
RFin_1800_1900 P
TXC
RFin_900 M
RFin_1800_1900 M
VR2
TXQP
TXQM
(C7530)
TXIP
TXIM
(C7529)
VrefRF01*
VPCTRL_900
RFin_900
MODE
Iref_900
Iref_1800_1900DETRFout_900
RFout_1800_1900
ANT
Page 48Nokia CorporationIssue 1 07/04
RH-37
Nokia Customer CareAppnedix 6A: Test Points
+ 2 d B m
+ d B m
1 . R F i n _ 9 0 0 P
2 . R F i n _ 9 0 0 M
T e s t p o i n t
B a n d G S M 8 5 0 o r 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n G M S K ( E d g e = o f f )
R X / T X C h a n n e l 1 9 0 o r 3 7
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
+ 2 d B m
+ d B m
R F i n _ 9 0 0
1 . R F i n _ 1 8 0 0 _ 1 9 0 0 P
2 . R F i n _ 1 8 0 0 _ 1 9 0 0 M
T e s t p o i n t
B a n d G S M 1 8 0 0 o r 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n G M S K ( E d g e = o f f )
R F i n _ 1 8 0 0 _ 1 9 0 0
L a y o u t : 1 c n a _ 4 1 ( B u i l d 4 . 0 )
V P C T R L _ 1 8 0 0 _ 1 9 0 0
T X A
T e s t p o i n t
B a n d G S M 8 5 0 o r 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n G M S K ( E d g e = o f f )
R X / T X C h a n n e l 1 9 0 o r 3 7
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
T e s t p o i n t
B a n d G S M 1 8 0 0 o r 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n G M S K ( E d g e = o f f )
V B A T
V P C T R L _ 9 0 0
+ 0 d B m
R X / T X C h a n n e l 7 0 0 o r 6 6 1
T x P o w e r L e v e l 5
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
+ 2 d B m
R X / T X C h a n n e l 7 0 0 o r 6 6 1
T x P o w e r L e v e l 5
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
+ d B m
P o w e r @ p r o b e
+ d B m
P o w e r @ p r o b e
R F i n _ 1 8 0 0 _ 1 9 0 0
+ d B m
R F o u t _ 9 0 0
+ 2 4 . 3 d B m
R F i n _ 9 0 0
R F o u t _ 1 8 0 0 _ 1 9 0 0
M O D E
I r e f _ 9 0 0
+ d B m
+ 2 1 . 6 d B m
V T X B _ 1 8 0 0 _ 1 9 0 0
T e s t p o i n t
B a n d G S M 8 5 0 o r 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n G M S K ( E d g e = o f f )
R X / T X C h a n n e l 1 9 0 o r 3 7
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
V T X B _ 9 0 0
T X C
T e s t p o i n t
B a n d G S M 1 8 0 0 o r 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n G M S K ( E d g e = o f f )
R X / T X C h a n n e l 7 0 0 o r 6 6 1
T x P o w e r L e v e l 5
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
I r e f _ 1 8 0 0 _ 1 9 0 0D E TR F o u t _ 9 0 0
V R 3
+ 2 0 d B m
+ 2 3 d B m
+ d B m
R F i n _ 9 0 0 P
A N T
R F i n _ 9 0 0 M
A N T
+ d B m
R F o u t _ 1 8 0 0 _ 1 9 0 0
T e s t p o i n t
B a n d G S M 8 5 0 o r 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n G M S K ( E d g e = o f f )
R X / T X C h a n n e l 1 9 0 o r 3 7
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
V R 2
T X Q P
T X Q M
R F i n _ 1 8 0 0 _ 1 9 0 0 P
R F i n _ 1 8 0 0 _ 1 9 0 0 M
( C 7 5 3 0 )
T X I P
T X I M
( C 7 5 2 9 )
V r e f R F 0 1 *
A N T
T e s t p o i n t
B a n d G S M 1 8 0 0 o r 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n G M S K ( E d g e = o f f )
R X / T X C h a n n e l 7 0 0 o r 6 6 1
T x P o w e r L e v e l 5
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
R F @ T e s t - J i g
T e s t p o i n t
B a n d G S M 8 5 0 o r 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
m e a s u r e m e n t w i t h t h e 5 0 O h m s p o w e r m e a s u r e m e n t .
P o w e r m e a s u r e m e n t s a t t h e t e s t p o i n t s b y m e a n s o f a p r o b e w i t h 4 7 0 ( ! ) O h m s a t t h e p e a k o n l y . G a i n s o r l o s s e s o f t h e k e y c o m p o n e n t s d e t e c t e d w i t h t h e p r o b e s h a l l b e c o m p a r a b l e t o t h e
M o d u l a t i o n G M S K ( E d g e = o f f )
T y p . + 2 3 d B m
R X / T X C h a n n e l 1 9 0 o r 3 7
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m
L o s s e s o f j i g c o m p e n s a t e d
R F @ T e s t - J i g
T e s t p o i n t
B a n d G S M 1 8 0 0 o r 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n G M S K ( E d g e = o f f )
T y p . + 2 0 d B m
R X / T X C h a n n e l 7 0 0 o r 6 6 1
T x P o w e r L e v e l 5
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
Issue 1 07/04Nokia CorporationPage 49
L o s s e s o f j i g c o m p e n s a t e d
RH-37
Appnedix 6A: Test PointsNokia Customer Care
- 1 5 - 8 d B m
1 . R F i n _ 9 0 0 P
2 . R F i n _ 9 0 0 M
T e s t p o i n t
B a n d G S M 8 5 0 o r 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
R X / T X C h a n n e l 1 9 0 o r 3 7
R F i n _ 9 0 0
T e s t p o i n t
B a n d G S M 8 5 0 o r 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
R X / T X C h a n n e l 1 9 0 o r 3 7
d B m
1 . R F i n _ 1 8 0 0 _ 1 9 0 0 P
B O M 1 , B O M 2 , B O M 2 b
I r e f _ 9 0 0
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
d B m
- 1 5 - 8 d B m
G S M 8 5 0 o r 9 0 0
T e s t p o i n t
B a n d
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
R X / T X C h a n n e l 1 9 0 o r 3 7
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
U s e s a m e t e s t p o i n t
I r e f _ 9 0 0 f o r h i g h e r G S M
I r e f _ 1 8 0 0 _ 1 9 0 0 ( B O M 1 )
I r e f _ 9 0 0 ( B O M 2 , B O M 2 b )
b a n d s i n c a s e o f B O M 2
a n d B O M 2 b !
G S M 1 8 0 0 o r 1 9 0 0
V o l t a g e 1 . 9 2 V ( B u r s t )
T e s t p o i n t
R E M A R K
B a n d
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
R X / T X C h a n n e l 7 0 0 o r 6 6 1
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
V o l t a g e 2 . 0 V ( B u r s t )
2 . R F i n _ 1 8 0 0 _ 1 9 0 0 M
T e s t p o i n t
B a n d G S M 1 8 0 0 o r 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
R F i n _ 1 8 0 0 _ 1 9 0 0
- 1 8 - 1 0 d B m
R X / T X C h a n n e l 7 0 0 o r 6 6 1
T x P o w e r L e v e l 5
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
- 1 6 - 8 d B m
L a y o u t : 1 c n a _ 4 1 ( B u i l d 4 . 0 )
V P C T R L _ 1 8 0 0 _ 1 9 0 0
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
T X A
T e s t p o i n t
B a n d G S M 1 8 0 0 o r 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
R X / T X C h a n n e l 7 0 0 o r 6 6 1
T x P o w e r L e v e l 5
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
d B m
P o w e r @ p r o b e
d B m
P o w e r @ p r o b e
V B A T
V P C T R L _ 9 0 0
+ 2 5 . 8 d B m
R F o u t _ 9 0 0
T e s t p o i n t
B a n d G S M 8 5 0 o r 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
R X / T X C h a n n e l 1 9 0 o r 3 7
+ d B m
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
R F i n _ 1 8 0 0 _ 1 9 0 0
V T X B _ 1 8 0 0 _ 1 9 0 0
V T X B _ 9 0 0
T X C
V R 3
+ 2 4 . 5 d B m
A N T
T e s t p o i n t
B a n d G S M 8 5 0 o r 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
R X / T X C h a n n e l 1 9 0 o r 3 7
+ d B m
R F i n _ 9 0 0 P
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
R F i n _ 9 0 0 M
V R 2
T X Q P
T X Q M
R F i n _ 1 8 0 0 _ 1 9 0 0 P
R F i n _ 1 8 0 0 _ 1 9 0 0 M
( C 7 5 3 0 )
T X I P
T X I M
( C 7 5 2 9 )
V r e f R F 0 1 *
R F i n _ 9 0 0
+ 2 3 . 1 d B m
R F o u t _ 1 8 0 0 _ 1 9 0 0
M O D E
I r e f _ 9 0 0
T e s t p o i n t
B a n d G S M 1 8 0 0 o r 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
R X / T X C h a n n e l 7 0 0 o r 6 6 1
+ d B m
T x P o w e r L e v e l 5
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
I r e f _ 1 8 0 0 _ 1 9 0 0D E TR F o u t _ 9 0 0
+ d B m
A N T
R F o u t _ 1 8 0 0 _ 1 9 0 0
T e s t p o i n t
B a n d G S M 1 8 0 0 o r 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
+ 2 1 . 5 d B m
R X / T X C h a n n e l 7 0 0 o r 6 6 1
T x P o w e r L e v e l 5
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
P o w e r @ p r o b e
A N T
R F @ T e s t - J i g
T e s t p o i n t
B a n d G S M 8 5 0 o r 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
m e a s u r e m e n t w i t h t h e 5 0 O h m s p o w e r m e a s u r e m e n t .
P o w e r m e a s u r e m e n t s a t t h e t e s t p o i n t s b y m e a n s o f a p r o b e w i t h 4 7 0 ( ! ) O h m s a t t h e p e a k o n l y . G a i n s o r l o s s e s o f t h e k e y c o m p o n e n t s d e t e c t e d w i t h t h e p r o b e s h a l l b e c o m p a r a b l e t o t h e
M o d u l a t i o n 8 - P S K ( E d g e = o n )
T y p . + 2 4 . 5 d B m
M O D E
R X / T X C h a n n e l 1 9 0 o r 3 7
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
L o s s e s o f j i g c o m p e n s a t e d
T e s t p o i n t
B a n d G S M 8 5 0 / 9 0 0 / 1 8 0 0 / 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
R X / T X C h a n n e l 1 9 0 o r 3 7 o r 7 0 0 o r 6 6 1
T x P o w e r L e v e l 1 0
T x D a t a T y p e A l l 1
V o l t a g e 1 . 9 6 V ( B u r s t )
R F @ T e s t - J i g
T e s t p o i n t
B a n d G S M 1 8 0 0 o r 1 9 0 0
A c t i v e U n i t T X
O p e r a t i o n M o d e B u r s t
M o d u l a t i o n 8 - P S K ( E d g e = o n )
+ 2 1 . 5 d B m
R X / T X C h a n n e l 7 0 0 o r 6 6 1
T x P o w e r L e v e l 5
T x D a t a T y p e A l l 1
P o w e r @ 5 0 O h m s
L o s s e s o f j i g c o m p e n s a t e d
Page 50Nokia CorporationIssue 1 07/04
RH-37
Nokia Customer CareAppnedix 6A: Test Points
Synthesizer test points
M e a s u r e d u s i n g t h e s p e c i a l p r o b e w i t h
~ 0 d B m ~ 0 d B m ~ 0 d B m
c a p a c i t i v e c o u p l i n g . N o e x a c t p o w e r
T a k e c a r e t o s e l e c t t h e h i g h e s t P C L 1 5 i f
a c t i v a t i n g T X C o n t i n u o u s m o d e , o t h e r w i s e
t h e p o w e r a m p l i f i e r w i l l b e d e s t r o y e d .
T e s t p o i n t A F C ( V c o f V C T C X O )
B a n d d e f a u l t
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l a n y
A F C ( v a l u e ) - 1 0 2 4 1 5 0 1 0 2 3
A F C v o l t a g e 0 . 1 V 1 . 4 V 2 . 5 V
T e s t p o i n t V c o f V C O
B a n d G S M 1 8 0 0 G S M 1 9 0 0 G S M 1 9 0 0
A c t i v e U n i t T X T X R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 5 1 2 5 1 2 8 1 0
F r e q u e n c y 3 4 2 0 . 4 M H z 3 7 0 0 . 4 M H z 3 9 7 9 . 6 M H z
D C L e v e l ~ 1 . 3 V ~ 2 . 5 V ~ 3 . 6 V
T e s t p o i n t V R 1 V r e f R F 0 1 V r e f R F 0 2
B a n d d e f a u l t ( G S M 9 0 0 o r G S M 8 5 0 )
A c t i v e U n i t R x
O p e r a t i o n M o d e B u r s t o r C o n t i n u o u s
R X / T X C h a n n e l d e f a u l t
D C L e v e l 4 . 7 6 1 . 3 5 V 1 . 3 5 V
T e s t p o i n t V R 3 V R 5 V R 7
B a n d d e f a u l t ( G S M 9 0 0 o r G S M 8 5 0 )
A c t i v e U n i t R x
O p e r a t i o n M o d e B u r s t o r C o n t i n u o u s
R X / T X C h a n n e l d e f a u l t
D C L e v e l 2 . 7 8 V 2 . 7 8 V 2 . 7 8 V
R F B u s C l k , R F B u s D a t a , R F B u s E n a 1
~ 2 V
N o t e
( C 2 9 0 2 / R 2 9 0 2 )
R F C L K _ I
T e s t p o i n t V C O o u t
B a n d G S M 1 8 0 0 G S M 1 9 0 0 G S M 1 9 0 0
A c t i v e U n i t T X T X R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l 5 1 2 5 1 2 8 1 0
F r e q u e n c y 3 4 2 0 . 4 M H z 3 7 0 0 . 4 M H z 3 9 7 9 . 6 M H z
L e v e l
m e a s u r e m e n t p o s s i b l e .
( s p e c . r a n g e =
N o t e s
- 3 . 5 + 2 . 5 d B m )
T a k e c a r e t o s e l e c t t h e h i g h e s t P C L 1 5 i f
a c t i v a t i n g T X C o n t i n u o u s m o d e , o t h e r w i s e
t h e p o w e r a m p l i f i e r w i l l b e d e s t r o y e d .
R F B u s C l k ( J 1 0 0 1 )
T e s t p o i n t
B a n d d e f a u l t ( G S M 9 0 0 o r G S M 8 5 0 )
A c t i v e U n i t R X
O p e r a t i o n M o d e B u r s t
R X / T X C h a n n e l d e f a u l t
S i g n a l
A m p l i t u d e
G r a p h
R F B u s C l k
R F B u s D a t a R F B u s E n a 1
R F B u s D a t a ( J 1 0 0 3 )
R F B u s E n a 1 ( J 1 0 0 2 )
V R 1 V R 5
V R 3
2 6 M H z
V C T C X O o u t
L a y o u t : 1 c n a _ 4 1 ( B u i l d 4 . 0 )
V C T C X O o u t ( R E F C L K )
T e s t p o i n t
B a n d d e f a u l t
S y n t h e s i z e r T e s t P o i n t s ( 1 / 1 )
8 8 0 m V p p
A c t i v e U n i t R X
O p e r a t i o n M o d e C o n t i n u o u s
R X / T X C h a n n e l d e f a u l t
S i g n a l
A m p l i t u d e
D C O f f s e t 1 . 5 V
F r e q u e n c y 2 6 M H z
G r a p h
m e a s u r e d w i t h p a s s i v e p r o b e 1 0 x , 1 0 M o h m / 8 p F , A C c o u p l e d )
A F C ( G 7 5 0 1 )
V c o f V C T C X O
V c o f V C O
( C 7 5 0 3 )
V C O o u t
3 . . 4 . 5 G H z
V r e f R F 0 1
V R 7 ( C 7 5 0 0 )
Issue 1 07/04Nokia CorporationPage 51
RH-37
Appnedix 6A: Test PointsNokia Customer Care
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Page 52Nokia CorporationIssue 1 07/04
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