Text preview for : trouble.pdf part of Nokia 3310 3330 Service Manual, Repairhints, Software, Tools, Module, Troubleshooting - File 15
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Component Identification: ............................................................................................. 3 Display Module Suppliers............................................................................................. 7 Antenna Suppliers .......................................................................................................... 7 Baseband Testpoints ...................................................................................................... 8 Power Schematic -Testpoints ....................................................................................11 Power Schematic - Plots ............................................................................................12 Cpu Schematic - Testpoints .......................................................................................13 CPU Schematic - PLots .............................................................................................14 Fault Finding Charts..................................................................................................... 15 1.Phone is Dead .........................................................................................................15 2. Flash Programming Does Not Work .....................................................................16 3.Phone Stays On or is Jammed ................................................................................18 4. Display Information : "Contact Service" ...............................................................20 5.No Network Found, No Call Established ...............................................................21 6.Phone Not Registeing to a Network ......................................................................22 7. Sim Related Errors ................................................................................................23 8.Audio Faults........................................................................................................... 25 9.Charging Error ........................................................................................................27 RF Key Component Placement.................................................................................... 29 Abbreviations in Fault Finding Charts........................................................................ 30 RF Component Locations ............................................................................................ 31 GSM900 Receiver Troubleshooting ........................................................................... 33 GSM1800 Receiver Troubleshooting .......................................................................... 37 GSM900 Transmitter ................................................................................................... 41 PCN Transmitter .......................................................................................................... 47 Synthesizer ................................................................................................................... 49 Hagar and serial interface ............................................................................................ 56 Wintesla tuning ............................................................................................................ 58
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The phone is dead
The voltage at C404, C202, C226, C227, C228 is = 3,6V Yes Voltage on R224 = 3,6V Yes Voltage at C316= 2,8V Voltage at C243 = 2,8V when WDDISX is grounded Yes See section "Phone is unable to stay ON"
No
Failiure in Vbatt line. Check X203, R220.
No
Defective N201 or PCB
No
WDDISX = 0 when PWR switch is pressed Yes
No
Check power switch Check WDDISX line : PWR switch -> R402 ->R224 Ok
Defective CCONT (N201) Defective PCB
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Because of the use of ìBGA components it is not possible to verify if there is a short-circuit in any of the lines to and from the MAD2WD1 and the SRAM/flash circuits. The faultfinding diagrams for flash programming are shown overleaf.
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Flash programming doesn't work
If fault information from Prommer is: a) MCU doesn't boot b) Serial dataline failure c) Serial clock line failure Yes Connect R224 (towards N201) (WDDISX) to GND. Yes C211 towards N201 (VBB) = 2.8 V C518 towards C506 (VXO) = 2.8 V when PWR switch is pressed. Yes No
No
See section: (2)
No
See section: "Phone is dead"
R308 (PURX) = "1" (2.8V) after 60ms
Check C220 (SLEEPCLK) = 32KHz square wave Yes
No
Check sleepclock circuit: B200, R214,...
Yes Check buffer: V502, R559,... V502 coll. (RFC) = 13MHz clock, 700mVpp typ. Yes Check the following lines: M-BUS: X202 pin 3 -> X201 pin 4 -> V204 pin 5 FBUS_RX: X202 pin 8 -> X201 pin 2 -> V204 pin 3 FBUS_TX: X202 pin 7 -> X201 pin 1 -> V204 pin 1 GND: X202 pin 4 -> X201 pin 3 -> GND Check also pull-up and -down resistors: R304, 302, 307 Ok Defective D300 MAD2 or D301 Flash
Defective N201 CCONT or overloaded PURX line No Check G502 VCXO 26MHz Ok Defective N500 HAGAR
No
Defective PCB
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Flash programming doesn't work
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External RAM error
Yes
Check for activity on control lines for SRAM : J323 (RAMSelX) No
Yes
Defective SRAM (D302)
No
Defective MAD2 (D300) or short circuit under the SRAM Yes Check the type of the flash
Algorithm file or alias not found. No MCU flash Vpp Error
Yes
Flashing via X202 ?
No
No Voltage at R310 higher than 1,7 V when flashing ? Yes
Defective flash or flashing software has wrong version
No Defective MAD2 (D300), defective voltagemonitor (D304) or flashing software has wrong version or short circuit under SRAM
Unknown error. See section "Phone Dead"
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Phone unable to stay on or phone is jammed.
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CCONT watchdog is served, J200 pulses "1" ->"0" Yes Software is able to run. Check UI (keys and display) Yes Ground the watchdog (Vbb = 2,8 V) (VXO = 2,8 V) No
See section "Phone is dead"
Yes
PURX (J374) = "1" (2,8V) after 60 msec.
No
Check sleepclk (C220) = 32 kHz square wave. Yes
No
Check sleepclk circuit (B200, R214,....)
Yes
Defective CCONT (N201) or overloads on the PURX line. No Check G502, 26 MHz OK Defective Hagar
Check RFC buffer (V502, R559, C560...)
Yes Possible defective ICs : MAD2 (D300) SRAM (D302) FLASH (D301) CCONT (N201)
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Phone doesn't register to a network or the phone is unable to make a call
C207 (Vcobba) > 2,7V Yes
No
Check CCONT (N201)
Vref at C201 =1,5V
No
Check C210, R509 and C536.
Yes Check supply voltage during RX slot : C234 (VCP) > 4,8V C240 (VRX) > 2,7V C245, R202, C239 (VSYN_1) > 2,7V C241 (VSYN_2) > 2,7V During TX slot : C242 (VTX) > 2,7V Yes Check synthesizer lines during RX slot R300 (->D300) R301/302 (->D300) for pulsing 1<->0 Yes Check RF control lines during RX slot : R502 = 0-1,2V typ. R514 = 0-2,3V max. Yes Check analog data signals during RX slot : R507 (RxIN, COBBA) = 0-1,5V C514 (RxIP, COBBA) = 0-1,5V Recieved signals is biased to 1,2 DC, nominal amplitude = 125-450 mVpp AC Yes Check RF control lines during TX slot : J503 (TxP, MAD2) = "0"<->"1" (2,8V) R518 (TxC, COBBA) = 0-2,3V max. Yes Check analog data signals during TX slot : TxIN, COBBA TxIP, COBBA TxQN, COBBA TxQP, COBBA Transmitted signals is biased to DC, nominal amplitude = 300 mVpp, freq. = 64 kHz Yes Check RF part. No If TxC error : Check COBBA (N100) If TxP error : Check MAD2 (D300)
No
Check CCONT (N201)
No
Check MAD2WD1 (D300)
No
Check COBBA (N100)
No
If DC error : Check COBBA (N100) else : Check RF part.
No
Check COBBA (N100)
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"Insert SIM card"
Voltage < 1,5 V on R220 towards C236 when BSI resistor is connected Yes Vsim, DATA, RST and CLK lines rises to 5V after power ON Yes
No
Check X203, R221, R220 and C236.
No
Check X400, R213, C221, C222, C222, C224, C225.
SIMIF(4:0) lines : J202, J204, J205, J206 rises to 2,8V after power ON Yes Defective MAD2 (D300)
No
Defective CCONT (N201) or PCB
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"SIM card rejected"
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Vsim according to spec.: 2,8V min. (3V SIM card) 4,5V min. (5V SIM card) Yes ATR data can be seen at C222 towards R213 Yes ATR data can be seen at SIMIF4 (J202) Yes J206 (SIMI/O_C line) is 1 during ATR meassage Yes Check CCONT (N201)
No
Defective CCONT (N201)
No
Check X400 and R213
No
Check CCONT (N201)
No
Check MAD2 (D300)
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Earpiece doesn't work and there aren't any electrical or mechanical problems OK
Check R119, R120, C122, C105, C125, C104, C126, OK Replace COBBA (N100)
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Microphone doesn't work and there aren't any electrical or mechanical problems.
C115 towards R115 (bias) = 2,1V Yes Check mic-line to COBBA : L402, C403, C407, C120, R111.
No
Check R115, V101, C123, C113.
OK
Replace COBBA (N100)
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Headset earpiece doesn't work and there are no mechanical problems
Check L401, R109, C101, C107. OK Replace COBBA (N100).
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Headset microphone doesn't work and there are no mechanical problems
R203 towards C205 is high when the headset plug is inserted. Yes R105 (XMICN line) towards COBBA (N100) = 2,1V Yes Check XMIC line to COBBA (N100) : L400, R105, C100, R102, C110
No
Check X200
No
Check R105, R100, R101, V100
OK
Replace COBBA (N100)
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Nothing happens when a charger is connected to the phone Yes The voltage at R210 towards R209 > 0,4V Yes Replace CCONT (N201) No
Check F200, L202, R209, R210
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"Not charging" message appears in the display Yes The voltage at R220 towards C236 (BSI, N201) = 0,8V when a charger is connected. Yes The voltage at R220 towards C236 (BTEMP, N201) = 0,5V when a charger is connected. Yes When the battery is an NI battery, then the voltage at R208 towards R200 must be app. Vb200 mV. When the battery is a LI battery, the voltage at R208 towards R200 must be Vb Yes The voltage at R208 towards R200 and CHAPS (N200) rises slowly when a charger is connected. Yes J201 performs as follows : Li battery : 0 -> Vmax-200mV PWM high ("1", 2,8V) Vmax-200mV -> Vmax PWM = 1 Hz Ni battery : PWM = 1 Hz Yes Check PCB No No No
Check X203, R221, R222
Check X203, R221, R222
No
Check R200, R208, V205, N200
Check N200
No
Check N200
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· RF measurements should be done with a Spectrum Analyzer and a high-frequency 500 ohm passive probe, for example HP54006A. (Note that when measuring with the 500 ohm probe the signal will be around 20 dB attenuated. The values in the following will have these 20 dB subtracted and represent the real value seen on the spectrum analyzer). LF (Low frequency) and DC measurements should be done with a 10:1 probe and an oscilloscope. The probe used in the following is 10M/8pF passive probe. If using another probe then bear in mind that the voltages displayed may be slightly different.
·
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BB DC ESD f: LF: LO P: PA PCB PLL RF RX T: TX UHF V: VCO VHF Baseband Direct Current Electro Static Dicharge Frequency of signal (measured with Spectrum Analyzer) Low frequency (measured with oscilloscope) Local Oscillator Power of signal in decibels (dB) (measured with Spectrum Analyzer) Power Amplifier Printed Circuit Board Phase Locked Loop Radio Frequency Receiver Time between pulses Transmitter Ultra High Frequency Voltage of signal (measured with oscilloscope) Voltage controlled oscillator Very High Frequency
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Vc1 (control pin for RXTX switch) Vc2 (control pin for RXTX Switch)
GSM1800 RF_out - C519
GSM_Rx (GSM900) - C556 LNA_P (GSM1800) C568 GSM 1800 RF_in L505 1st Dual SAW (GSM1800 output) 1st Dual SAW (GSM 900 output) PCN_Rx (GSM1800)
1st Dual SAW (GSM900 Input)
1st Dual SAW (GSM1800 input)
ANT (anntenna output of RXTX Switch)
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LNA_in (GSM900) - L507
LNA_G (GSM900) - V501
LNAB_D (GSM900) - V501
LNA_out (GSM900) - C537
2nd Dual SAW (GSM1800 input) Z500
2nd Dual SAW (GSM1800 output) - Z500
RXIP & RXQP - R504
T501 unbal (GSM900)
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Connect the phone to a PC with the module repair jig.
Start Wintesla-Service-Software and Select Product Open... NHM-5 Select: Product Band EGSM Select: Testing RF Controls RX Continuous Cont. Mode Ch: 60 AGC Absolute: 5 Apply Alt+p b e Alt+e r Alt+r Alt+o, 60 Alt+p
The set-up should now look like this:
Apply a 947.0667 MHz (channel 60 + 67.710kHz offset) -55 dBm signal to the RF-connector.
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Measuring with an oscilloscope on "RXIP" or "RXQP" this picture should be seen on a working GSM900 receiver:
Signal amplitude DC offset Frequency
~1.35V 1,1V 67kHz
If this picture is not seen go to section Fault finding chart for GSM900 receiver of this document
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Apply -80dBm 942.667MHz signal from generator to antenna connector Yes Oscilloscope at RXI Signal 950mVpp DC offset 1,1V Frequency 67,7kHz Change generator level to -55dBm Spectrumanalyzer Spectrumanalyzer GSM LNA out No 1st Dual SAW In1 -73dBm -85dBm Yes Yes Oscilloscope LNA_G 2.4-2.8V LNAB_D 2.4-2.8V Yes Oscilloscope V501, RFout 2.1-2.2V V501, RFin 0.8-0.9V Yes Check V501 Check R514, C539, V501,C541,C537, C533 Yes Check Hagar N500 Oscilloscope VRX 2.7V Check Hagar serial interface GSM_RX_SW -84dBm Yes Check 1st Dual RX SAW Z501 Check RX/TX Switch Z502
EGSM Fault tree
No
Yes
No
No
No
No
Check BaseBand
EGSM chain functional
Yes
No
Spectrumanalyzer No T501, unbal -75dBm Yes Oscilloscope VRX 2.7V Check Hagar serial interface Yes
Check C534, Z500
No
Check BB
Check Hagar N500
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For easy error tracing it is important to know the signal path of the GSM900 receiver. The components can be grouped into blocks and drawn as shown below.
VRF_RX
OUT_BB1_I OUT_BB1_Q
VRF_RX
Cm_dtos_Q
C1_BB1_Q
C2_BB1_Q
Cp_dtos_Q Cp_f_I
I_DCN2_I I_DCN2_Q
Cm_dtos_I
VREF RB_EXT VB_EXT
C1_BB1_I
Hagar
SAW RX PCN Ant Switch TX RX GSM TX
LNA
SAW
INP_P_RX
DtoS 8 / 18 dB
BIQUAD
BB_Gain
C2_BB1_I
Cp_dtos_I
Cm_f_Q
Cm_f_I Cp_f_Q
RXI
DNC2 0-40dB
RXI
INM_P_RX
VREF_RX LNA INP_G_RX
DtoS BIQUAD BB_Gain
VREF_RX
RXQ
DNC2 0-40dB
RXQ
INM_G_RX 2 LNA_P / LNAB_G 2 RF Controls
8 / 18 dB
2
2
2
VCP
2
LNA_G / LNAB_D
Last edit 07:49 15.03.00 HDa12 RF Troubleshooting.doc
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PAMS Technical Documentation
From the antenna-pad the RF signal is lead to the RX/TX switch (Z502). The RX/TX switch is normally open to the two RX outlets GSM_Rx and DCS_Rx. If no control voltage is present at VC1 or VC2 the RX/TX switch will work as a diplexer and the GSM900 signal is pass to GSM_Rx and the GSM1800 signal to DCS_Rx. From GSM_Rx the GSM900 signal is feed to the 1st Dual RX SAW filter via C556.
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The GSM900 front-end consists mainly of two SAW filters (Z501 and Z500) and one LNA (V501) inbetween and finally one balun (T501). The SAW filters provides out-of-band blocking immunity, the LNA provides front-end gain and the balun provides a balanced signal for Hagar (N500) The signal-path is through Z501 (In-band insertion-loss 3,5dB), through the matching circuit (C545, L507 and C541) and to the GSM900 LNA (V501, RFin). The LNA has about 18dB gain when it is "on" (LNA_G = 2.8V and LNAB_D = 2.8V). If the signal applied to the antenna-connector is more than 45dBm the AGC will gain-step the LNA (LNA_G = 2.8V and LNAB_D = 0V) which means the LNA Gain will now have negative gain (loss) of 12 dB. From the LNA (V501 RF out) the signal is lead through the LNA-output-matching-circuit (C537, L520 and C534), through the 2nd Dual RX SAW Z500 (In-band insertion-loss 3,5dB) to the GSM900 balun T501. From the balun the signal is balanced and is lead to Hagar (N500 IMP_G_RX and INM_G_RX).
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The balanced RX signal is mixed with a signal from the local oscillator at the same frequency as the wanted RX signal. After mixing the signal is converted to a single-ended signal in the DtoS (Differential to Single-ended) amplifier. The signal is now filtered in a BIQUAD filter to provide channel separation,
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amplified in the BB_Gain amplifier and DC compensated in DCN2.
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Connect the phone to a PC with the module repair jig. Start Wintesla-Service-Software and Select Product Open... NHM-5 Select: Product Band PCN Select: Testing RF Controls RX Continuous Cont. Mode Ch: 700 AGC Absolute: 5 Apply Alt+p b p Alt+e r Alt+r Alt+o, 700 Alt+p
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The set-up should now look like this:
Apply an 1842.867 MHz (channel 700 + 67.710kHz offset) -55 dBm signal to the RF connection (remember to compensate for cable and adapter attenuation). Measuring with an oscilloscope on "Hagar RXI" or "Hagar RXQ" this picture should be seen on a working GSM1800 receiver:
Signal amplitude DC offset Frequency
~1.35V 1,1V 67kHz
If this picture is not seen not go to section Fault finding chart for GSM1800 receiver of this document
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Apply -80dBm 1842.867MHz signal from generator to antenna connector Yes Oscilloscope at RXI Signal 1.5Vpp DC offset 1,1V Frequency 67,7kHz Change generator level to -55dBm Spectrumanalyzer Spectrumanalyzer 1st Dual RX SAW V500, RFout No In2 -72dBm -92dBm Yes Yes Oscilloscope LNAB_G 2.4-2.8V LNA_P 0V Yes Oscilloscope V500, RFout 2.1-2.2V No V500, RFin 0.8-0.9V Yes Check V500 Check R503, L502, V500, C519, C521, C523, C525, L505, C510 Yes Check Hagar N500 Oscilloscope VRX 2.7V Check Hagar serial interface PCN_RX -91.5dBm Yes Check RX/TX Switch Z502
PCN Fault tree
No
Yes
No
No
No
No
Check BaseBand
Check Z500
EGSM chain functional
Yes
Spectrumanalyzer No T500, unbal -79.5dBm Yes Oscilloscope VRX 2.7V Check Hagar serial interface Yes
Check C519,L521, Z500
No
Check BB
Check Hagar N500
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For easy error tracing it is important to know the signal path of the PCN receiver. The components can be grouped into blocks and drawn as shown below.
VRF_RX
OUT_BB1_I OUT_BB1_Q
VRF_RX
Cm_dtos_Q
C1_BB1_Q
C2_BB1_Q
Cp_dtos_Q Cp_f_I
I_DCN2_I I_DCN2_Q
Cm_dtos_I
VREF RB_EXT VB_EXT
C1_BB1_I
Hagar
SAW RX PCN Ant Switch TX RX GSM TX
LNA
SAW
INP_P_RX
DtoS 8 / 18 dB
BIQUAD
BB_Gain
C2_BB1_I
Cp_dtos_I
Cm_f_Q
Cm_f_I Cp_f_Q
RXI
DNC2 0-40dB
RXI
INM_P_RX
VREF_RX LNA INP_G_RX
DtoS BIQUAD BB_Gain
VREF_RX
RXQ
DNC2 0-40dB
RXQ
INM_G_RX 2 LNA_P / LNAB_G 2 RF Controls
8 / 18 dB
2
2
2
VCP
2
LNA_G / LNAB_D
Last edit 07:49 15.03.00 HDa12 RF Troubleshooting.doc
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NHM-5NX RF Troubleshooting
PAMS Technical Documentation
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From the antenna-pad the RF signal is lead to the RX/TX switch (Z502). The RX/TX switch is normally open to the two RX outlets GSM_Rx and DCS_Rx. If no control voltage is present at VC1 or VC2 the RX/TX switch will work as a diplexer and the GSM900 signal is pass to GSM_Rx and the GSM1800 signal to DCS_Rx. From GSM_Rx the GSM1800 signal is feed to the 1st Dual RX SAW filter via C547.
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The GSM1800 front-end consists mainly of two SAW filters (Z501 and Z500) and one LNA (V500) inbetween and finally one balun (T500). The SAW filters provides out-of-band blocking immunity, the LNA provides front-end gain and the balun provides a balanced signal for Hagar (N500) The signal-path is through Z501 (In-band insertion-loss 3,5dB), through the matching circuit (C510, L505 and C525) and to the GSM1800 LNA (V500, RFin). The LNA has about 17dB gain when it is "on" (LNAB_G = 2.8V and LNA_P = 0V). If the signal applied to the antenna-connector is more than 45dBm the AGC will gain-step the LNA (LNAB_G = 2.8V and LNA_P = 0V) which means the LNA Gain will now have negative gain (loss) of 8 dB. From the LNA (V500 RF out) the signal is lead through the LNA-output-matching-circuit (C519), through the 2nd Dual RX SAW Z500 (In-band insertion-loss 3,5dB) to the GSM1800 balun T500. From the balun the signal is balanced and is lead to Hagar (N500 IMP_P_RX and INM_P_RX).
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The balanced RX signal is mixed with a signal from the local oscillator at the same frequency as the wanted RX signal. After mixing the signal is converted to a single-ended signal in the DtoS (Differential to Single-ended) amplifier. The signal is now filtered in a BIQUAD filter to provide channel separation, amplified in the BB_Gain amplifier and DC compensated in DCN2.
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V_ANT_1/ V_ANT_2 2 VB_DET RX PCN Ant Switch TX Dir. Coupler RX GSM TX PA OUTP_D_TX/ OUTM_D_TX 2
Open collector
RF Controls
VTXLO_G
TXI_0/TXI_180 2 2 TXQ_0/TXQ_180
OUTP_G_TX/ OUTM_G_TX 2
Open collector
DET
DET
PWC
VBATT
Vpctrl_fb
Vpctrl_g
Vpctrl_p
TXC
TXP
TXC TXP
VTX VBATT
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RXTX switch Vc2 - Z502
Vc1 - Z502
DCS_Tx - C569
ANT- Z502
DET0 - C588 GSM_Tx Z502 Antenna pad Power amplifier: Pout (GSM1800) - N502
Power amplifier, Pout (GSM900) - N502 Power amplifier: Vtxlo - N502 Vpctrl (GSM900) - R532 Power amplifier: Pin (GSM1800) N502
Pin (GSM900) - R551
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TXIQ - R541 & R548
03 unbalanced - C566
T504 unbalanced - C583
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Start WinTesla-Service-Software and Select: Product Band GSM Select: Testing RF Controls TX Burst TX Data Type: Random TX Power Level : 5 Channel: 60 Apply Alt+p b g Alt+e r Alt+b Alt+d, r Alt+x, 5 Alt+n, 60 Alt+a
Your screen should look like this:
Measure the output power of the phone; it should be around 32 dBm.
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For the spectrum analyzer measurements in the following chart use the 500 ohm passive probe. Since the signal measured is bursted it is advised to set the analyzer to maxhold.
Measure TX power on "ANT" Power > 30.5 dBm in 50 ohm. Measure TX power on GSM_Tx. Power ~ 8 dBm in 500 ohm Measure TX power on "Pout". Power ~ 8 dBm in 500 ohm Measure TX power on "Pin". Power ~ -25 dBm in 500 ohm Measure TX power "TX buffer input" Measure TX power unbal T504 Power ~ -30 dBm in 500 ohm With Osc check: VTX = 2.7V + discretes around T504
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Check POGO pins, C593, L510
With Osc on RXTX switch check: Vc1 = 0V, Vc2 = 2.7V
Check L515 (Coupler)
With Osc on PA check: Vpctrl GSM900. Vpctrl ~ 1.7Vpp (see figure ?)
With osc on TX buffer check: TXBUF = 2.7V
Check Z503
Yes
Yes
Yes
No
Check RXTX switch
Check PA N502
Check V601, V602 + discretes around No
No No No
With Osc check TXC (see figure below)
Check Hagar + Serial bus
Yes
With Osc check "Vpctrl" ~ "TXC"?
No
Check V503 + discretes around
Vpctrl GSM 900 @ power level 5 TXC signal @ power level 5
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The following plots show different situations of TX IQ measurements. Depending on the time the modulation may cause the signal to look differently.
For how to check Hagar and serial bus see section Hagar and serial interface.
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Apply a RF-cable to the RF-connector to allow the transmitted signal act as normal. RF-cable should be connected to measurement equipment or to at least a 10-dB attenuator, otherwise the PA may be damaged.
Start WinTesla-Service-Software and Select: Product Band PCN Select: Testing RF Controls TX Burst TX Data Type: Random TX Power Level: 0 Channel: 700 Apply Alt+p b p Alt+e r Alt+b Alt+d, r Alt+x, 0 Alt+n, 700 Alt+a
Your screen should look like:
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Fault finding chart for PCN transmitter
Measure TX power on "ANT" No Power > 27.5 dBm in 50 ohm
Measure TX power on DCS_Tx. Power ~7 dBm in 500 ohm
No
Measure TX power on "Pout". Power ~7 dBm in 500 ohm
No
Measure TX power on "Pin". Power ~-17 dBm in 500 ohm
No
Measure TX power unbal T503. Power ~18 dBm in 500 ohm
No
With Osc check: VTX = 2.7V + discretes around T503
Yes
Yes
Yes
Yes
Yes
Check POGO pins, C593, L510
With Osc on RXTX switch check: Vc1 = 2.7V, Vc2 = 0V
Check L515 (Coupler)
With Osc on PA check: Vpctrl GSM1800. Vpctrl ~ 1.5Vpp
No
With Osc check TXC (see figure ?)
Check R542, R539, R543, C566
Yes
Yes
Yes No
Check RXTX switch
Check PA N502
With Osc check "Vpctrl" = "TXC"?
No
Check V503 + discretes around
No No
Check Hagar + Serial bus
TXIQ signals look the same in PCN and GSM.
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There is only one PLL synthesizer generating frequencies for both Rx and Tx in both bands ( PCN and GSM). VCO frequency is divided by 2 or by 4 in HAGAR depending on which band is active.
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VCTCXO: Out (26 MHz) - G502
VCTCXO: Vtcxo (2.7V) - G502
VCTCXO buffer Input - V502
RFC (13 MHz) - L511
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Start WinTesla-Service-Software and Select: Product Band EGSM Select: Testing RF Controls RX Continuous Cont. Mode Ch: 60 Alt+p b e Alt+e r Alt+r Alt+o, 60
Measure the output of the VCO (G500) with spectrum analyzer and 500 ohm passive probe; the power should be around 20 dBm.
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The 26 MHz oscillator (G502) is used as a reference frequency for the PLL synthesizer and as the system clock for BB ( 13 MHz) after it is divided by 2 in HAGAR. 26 MHz signal from the VCTCXO is approx. 0,8 Vpp. Frequency of this oscillator is adjusted by dc voltage ( Vcon ) coming from the DAC in COBBA. Range of Vcon is 0.3 2.3 V.
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The VCO is generating frequencies in the range of 3420 3840 MHz when PLL is in function. These are divided by 2 or by 4 in HAGAR so that they can generate all channels in GSM and PCN. Frequency of the VCO is controlled by dc voltage ( Vc ) coming from the loop filter. Range of the Vc when PLL is in function is 0.7 3.8 V. Even if PLL is not in lock state (Vc out of range) there is some frequency at the output of the VCO ( G500) which is between 3 and 4 GHz. This is of course true only if VCO is working and if VCO power supply is present (2.7V).
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From WinTesla chose: Product > Band > EGSM Testing > RF Controls > Rx continuous > Ch 60
Spectrum Analyzer VCO output ( G500 out) 3788 MHz
No
Oscilloscope VCTCXO Power Supply (G502 Vcc) 2,7 V
Yes
Oscilloscope VCTCXO output (G502 out) 26 MHz, approx. 1.2 Vpp
Yes
Oscilloscope VCO Power Supply (G500 Vcc) 2,7 V
Yes
Yes
PLL block functional
No
Check CCONT, Software?? Phone not in function
No
VCTCXO is dead
No
Check CCONT, Software?? Phone not in function
Check HAGAR, wrong writting to HAGAR (SCLK,SDATA,SLE, HAGARRESET)
Yes
Spectrum Analyzer VCO output ( G500 out) Some signal between 3 and 4 GHz
No
VCO is dead
It is important to say that power supply for VCTCXO ( VXO) is OFF only in `Deep Sleep Mode' and power supply for VCO ( G500 Vcc) is OFF in `Sleep Mode'. If the phone gets `dead' very short time after the power is turned ON, possible reason for this might be that 13 MHz system clock signal is not coming to the BB. Use the following chart to find the problem.
3DJH
1RNLD 0RELOH 3KRQHV /WG
,VVXH
PAMS Technical Documentation
NHM-5NX RF Troubleshooting
Oscilloscope Turn the phone ON and measure power supply fo r the VCTCX ( G502 Vcc) 2,7 V
Oscilloscope
Oscilloscope
Oscilloscope
Yes
Measure the output signal of the VCTCXO ( G502 out ) approx. 1.2 Vpp, 26 MHz
Yes
13 MHz buffer input approx. 0.4 Vpp (C559)
Yes
13 MHz buffer output approx. 0,6Vpp (L511)
Yes
No
Check CCONT, phone is 'dead'
No
VCTCXO is 'dead'
No
Check HAGAR, divider by 2 in HAGAR not in function ( not enabled)
No
Buffer transistor not in function ( V500 )
Reason is something else ( Software, battery, etc. )
,VVXH
1RNLD 0RELOH 3KRQHV /WG
3DJH
NHM-5NX RF Troubleshooting
PAMS Technical Documentation
)UHTXHQF\ OLVWV
*60
CH TX RX VCO TX VCO RX 975 880.2 925.2 3520.8 3700.8 976 880.4 925.4 3521.6 3701.6 977 880.6 925.6 3522.4 3702.4 978 880.8 925.8 3523.2 3703.2 979 881 926 3524 3704 980 881.2 926.2 3524.8 3704.8 981 881.4 926.4 3525.6 3705.6 982 881.6 926.6 3526.4 3706.4 983 881.8 926.8 3527.2 3707.2 984 882 927 3528 3708 985 882.2 927.2 3528.8 3708.8 986 882.4 927.4 3529.6 3709.6 987 882.6 927.6 3530.4 3710.4 988 882.8 927.8 3531.2 3711.2 989 883 928 3532 3712 990 883.2 928.2 3532.8 3712.8 991 883.4 928.4 3533.6 3713.6 992 883.6 928.6 3534.4 3714.4 993 883.8 928.8 3535.2 3715.2 994 884 929 3536 3716 995 884.2 929.2 3536.8 3716.8 996 884.4 929.4 3537.6 3717.6 997 884.6 929.6 3538.4 3718.4 998 884.8 929.8 3539.2 3719.2 999 885 930 3540 3720 1000 885.2 930.2 3540.8 3720.8 1001 885.4 930.4 3541.6 3721.6 1002 885.6 930.6 3542.4 3722.4 1003 885.8 930.8 3543.2 3723.2 1004 886 931 3544 3724 1005 886.2 931.2 3544.8 3724.8 1006 886.4 931.4 3545.6 3725.6 1007 886.6 931.6 3546.4 3726.4 1008 886.8 931.8 3547.2 3727.2 1009 887 932 3548 3728 1010 887.2 932.2 3548.8 3728.8 1011 887.4 932.4 3549.6 3729.6 1012 887.6 932.6 3550.4 3730.4 1013 887.8 932.8 3551.2 3731.2 1014 888 933 3552 3732 1015 888.2 933.2 3552.8 3732.8 1016 888.4 933.4 3553.6 3733.6 1017 888.6 933.6 3554.4 3734.4 1018 888.8 933.8 3555.2 3735.2 1019 889 934 3556 3736 1020 889.2 934.2 3556.8 3736.8 1021 889.4 934.4 3557.6 3737.6 1022 889.6 934.6 3558.4 3738.4 1023 889.8 934.8 3559.2 3739.2 0 890 935 3560 3740 Frequency list NHM-5 GSM900 CH TX RX VCO TX VCO RX 1 890.2 935.2 3560.8 3740.8 2 890.4 935.4 3561.6 3741.6 3 890.6 935.6 3562.4 3742.4 4 890.8 935.8 3563.2 3743.2 5 891 936 3564 3744 6 891.2 936.2 3564.8 3744.8 7 891.4 936.4 3565.6 3745.6 8 891.6 936.6 3566.4 3746.4 9 891.8 936.8 3567.2 3747.2 10 892 937 3568 3748 11 892.2 937.2 3568.8 3748.8 12 892.4 937.4 3569.6 3749.6 13 892.6 937.6 3570.4 3750.4 14 892.8 937.8 3571.2 3751.2 15 893 938 3572 3752 16 893.2 938.2 3572.8 3752.8 17 893.4 938.4 3573.6 3753.6 18 893.6 938.6 3574.4 3754.4 19 893.8 938.8 3575.2 3755.2 20 894 939 3576 3756 21 894.2 939.2 3576.8 3756.8 22 894.4 939.4 3577.6 3757.6 23 894.6 939.6 3578.4 3758.4 24 894.8 939.8 3579.2 3759.2 25 895 940 3580 3760 26 895.2 940.2 3580.8 3760.8 27 895.4 940.4 3581.6 3761.6 28 895.6 940.6 3582.4 3762.4 29 895.8 940.8 3583.2 3763.2 30 896 941 3584 3764 31 896.2 941.2 3584.8 3764.8 32 896.4 941.4 3585.6 3765.6 33 896.6 941.6 3586.4 3766.4 34 896.8 941.8 3587.2 3767.2 35 897 942 3588 3768 36 897.2 942.2 3588.8 3768.8 37 897.4 942.4 3589.6 3769.6 38 897.6 942.6 3590.4 3770.4 39 897.8 942.8 3591.2 3771.2 40 898 943 3592 3772 41 898.2 943.2 3592.8 3772.8 42 898.4 943.4 3593.6 3773.6 43 898.6 943.6 3594.4 3774.4 44 898.8 943.8 3595.2 3775.2 45 899 944 3596 3776 46 899.2 944.2 3596.8 3776.8 47 899.4 944.4 3597.6 3777.6 48 899.6 944.6 3598.4 3778.4 49 899.8 944.8 3599.2 3779.2 50 900 945 3600 3780 51 900.2 945.2 3600.8 3780.8 52 900.4 945.4 3601.6 3781.6 53 900.6 945.6 3602.4 3782.4 54 900.8 945.8 3603.2 3783.2 55 901 946 3604 3784 56 901.2 946.2 3604.8 3784.8 57 901.4 946.4 3605.6 3785.6 58 901.6 946.6 3606.4 3786.4 59 901.8 946.8 3607.2 3787.2 60 902 947 3608 3788 61 902.2 947.2 3608.8 3788.8 62 902.4 947.4 3609.6 3789.6 CH TX RX VCO TX VCO RX 63 902.6 947.6 3610.4 3790.4 64 902.8 947.8 3611.2 3791.2 65 903 948 3612 3792 66 903.2 948.2 3612.8 3792.8 67 903.4 948.4 3613.6 3793.6 68 903.6 948.6 3614.4 3794.4 69 903.8 948.8 3615.2 3795.2 70 904 949 3616 3796 71 904.2 949.2 3616.8 3796.8 72 904.4 949.4 3617.6 3797.6 73 904.6 949.6 3618.4 3798.4 74 904.8 949.8 3619.2 3799.2 75 905 950 3620 3800 76 905.2 950.2 3620.8 3800.8 77 905.4 950.4 3621.6 3801.6 78 905.6 950.6 3622.4 3802.4 79 905.8 950.8 3623.2 3803.2 80 906 951 3624 3804 81 906.2 951.2 3624.8 3804.8 82 906.4 951.4 3625.6 3805.6 83 906.6 951.6 3626.4 3806.4 84 906.8 951.8 3627.2 3807.2 85 907 952 3628 3808 86 907.2 952.2 3628.8 3808.8 87 907.4 952.4 3629.6 3809.6 88 907.6 952.6 3630.4 3810.4 89 907.8 952.8 3631.2 3811.2 90 908 953 3632 3812 91 908.2 953.2 3632.8 3812.8 92 908.4 953.4 3633.6 3813.6 93 908.6 953.6 3634.4 3814.4 94 908.8 953.8 3635.2 3815.2 95 909 954 3636 3816 96 909.2 954.2 3636.8 3816.8 97 909.4 954.4 3637.6 3817.6 98 909.6 954.6 3638.4 3818.4 99 909.8 954.8 3639.2 3819.2 100 910 955 3640 3820 101 910.2 955.2 3640.8 3820.8 102 910.4 955.4 3641.6 3821.6 103 910.6 955.6 3642.4 3822.4 104 910.8 955.8 3643.2 3823.2 105 911 956 3644 3824 106 911.2 956.2 3644.8 3824.8 107 911.4 956.4 3645.6 3825.6 108 911.6 956.6 3646.4 3826.4 109 911.8 956.8 3647.2 3827.2 110 912 957 3648 3828 111 912.2 957.2 3648.8 3828.8 112 912.4 957.4 3649.6 3829.6 113 912.6 957.6 3650.4 3830.4 114 912.8 957.8 3651.2 3831.2 115 913 958 3652 3832 116 913.2 958.2 3652.8 3832.8 117 913.4 958.4 3653.6 3833.6 118 913.6 958.6 3654.4 3834.4 119 913.8 958.8 3655.2 3835.2 120 914 959 3656 3836 121 914.2 959.2 3656.8 3836.8 122 914.4 959.4 3657.6 3837.6 123 914.6 959.6 3658.4 3838.4 124 914.8 959.8 3659.2 3839.2
3DJH
1RNLD 0RELOH 3KRQHV /WG
,VVXH
PAMS Technical Documentation 3&1
CH
512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605
NHM-5NX RF Troubleshooting
TX 1710.2 1710.4 1710.6 1710.8 1711 1711.2 1711.4 1711.6 1711.8 1712 1712.2 1712.4 1712.6 1712.8 1713 1713.2 1713.4 1713.6 1713.8 1714 1714.2 1714.4 1714.6 1714.8 1715 1715.2 1715.4 1715.6 1715.8 1716 1716.2 1716.4 1716.6 1716.8 1717 1717.2 1717.4 1717.6 1717.8 1718 1718.2 1718.4 1718.6 1718.8 1719 1719.2 1719.4 1719.6 1719.8 1720 1720.2 1720.4 1720.6 1720.8 1721 1721.2 1721.4 1721.6 1721.8 1722 1722.2 1722.4 1722.6 1722.8 1723 1723.2 1723.4 1723.6 1723.8 1724 1724.2 1724.4 1724.6 1724.8 1725 1725.2 1725.4 1725.6 1725.8 1726 1726.2 1726.4 1726.6 1726.8 1727 1727.2 1727.4 1727.6 1727.8 1728 1728.2 1728.4 1728.6 1728.8
RX VCO TX VCO RX 1805.2 3420.4 3610.4 1805.4 6841.6 7221.6 1805.6 6842.4 7222.4 1805.8 6843.2 7223.2 1806 6844 7224 1806.2 6844.8 7224.8 1806.4 6845.6 7225.6 1806.6 6846.4 7226.4 1806.8 6847.2 7227.2 1807 6848 7228 1807.2 6848.8 7228.8 1807.4 6849.6 7229.6 1807.6 6850.4 7230.4 1807.8 6851.2 7231.2 1808 6852 7232 1808.2 6852.8 7232.8 1808.4 6853.6 7233.6 1808.6 6854.4 7234.4 1808.8 6855.2 7235.2 1809 6856 7236 1809.2 6856.8 7236.8 1809.4 6857.6 7237.6 1809.6 6858.4 7238.4 1809.8 6859.2 7239.2 1810 6860 7240 1810.2 6860.8 7240.8 1810.4 6861.6 7241.6 1810.6 6862.4 7242.4 1810.8 6863.2 7243.2 1811 6864 7244 1811.2 6864.8 7244.8 1811.4 6865.6 7245.6 1811.6 6866.4 7246.4 1811.8 6867.2 7247.2 1812 6868 7248 1812.2 6868.8 7248.8 1812.4 6869.6 7249.6 1812.6 6870.4 7250.4 1812.8 6871.2 7251.2 1813 6872 7252 1813.2 6872.8 7252.8 1813.4 6873.6 7253.6 1813.6 6874.4 7254.4 1813.8 6875.2 7255.2 1814 6876 7256 1814.2 6876.8 7256.8 1814.4 6877.6 7257.6 1814.6 6878.4 7258.4 1814.8 6879.2 7259.2 1815 6880 7260 1815.2 6880.8 7260.8 1815.4 6881.6 7261.6 1815.6 6882.4 7262.4 1815.8 6883.2 7263.2 1816 6884 7264 1816.2 6884.8 7264.8 1816.4 6885.6 7265.6 1816.6 6886.4 7266.4 1816.8 6887.2 7267.2 1817 6888 7268 1817.2 6888.8 7268.8 1817.4 6889.6 7269.6 1817.6 6890.4 7270.4 1817.8 6891.2 7271.2 1818 6892 7272 1818.2 6892.8 7272.8 1818.4 6893.6 7273.6 1818.6 6894.4 7274.4 1818.8 6895.2 7275.2 1819 6896 7276 1819.2 6896.8 7276.8 1819.4 6897.6 7277.6 1819.6 6898.4 7278.4 1819.8 6899.2 7279.2 1820 6900 7280 1820.2 6900.8 7280.8 1820.4 6901.6 7281.6 1820.6 6902.4 7282.4 1820.8 6903.2 7283.2 1821 6904 7284 1821.2 6904.8 7284.8 1821.4 6905.6 7285.6 1821.6 6906.4 7286.4 1821.8 6907.2 7287.2 1822 6908 7288 1822.2 6908.8 7288.8 1822.4 6909.6 7289.6 1822.6 6910.4 7290.4 1822.8 6911.2 7291.2 1823 6912 7292 1823.2 6912.8 7292.8 1823.4 6913.6 7293.6 1823.6 6914.4 7294.4 1823.8 6915.2 7295.2
CH
606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699
TX 1729 1729.2 1729.4 1729.6 1729.8 1730 1730.2 1730.4 1730.6 1730.8 1731 1731.2 1731.4 1731.6 1731.8 1732 1732.2 1732.4 1732.6 1732.8 1733 1733.2 1733.4 1733.6 1733.8 1734 1734.2 1734.4 1734.6 1734.8 1735 1735.2 1735.4 1735.6 1735.8 1736 1736.2 1736.4 1736.6 1736.8 1737 1737.2 1737.4 1737.6 1737.8 1738 1738.2 1738.4 1738.6 1738.8 1739 1739.2 1739.4 1739.6 1739.8 1740 1740.2 1740.4 1740.6 1740.8 1741 1741.2 1741.4 1741.6 1741.8 1742 1742.2 1742.4 1742.6 1742.8 1743 1743.2 1743.4 1743.6 1743.8 1744 1744.2 1744.4 1744.6 1744.8 1745 1745.2 1745.4 1745.6 1745.8 1746 1746.2 1746.4 1746.6 1746.8 1747 1747.2 1747.4 1747.6
RX 1824 1824.2 1824.4 1824.6 1824.8 1825 1825.2 1825.4 1825.6 1825.8 1826 1826.2 1826.4 1826.6 1826.8 1827 1827.2 1827.4 1827.6 1827.8 1828 1828.2 1828.4 1828.6 1828.8 1829 1829.2 1829.4 1829.6 1829.8 1830 1830.2 1830.4 1830.6 1830.8 1831 1831.2 1831.4 1831.6 1831.8 1832 1832.2 1832.4 1832.6 1832.8 1833 1833.2 1833.4 1833.6 1833.8 1834 1834.2 1834.4 1834.6 1834.8 1835 1835.2 1835.4 1835.6 1835.8 1836 1836.2 1836.4 1836.6 1836.8 1837 1837.2 1837.4 1837.6 1837.8 1838 1838.2 1838.4 1838.6 1838.8 1839 1839.2 1839.4 1839.6 1839.8 1840 1840.2 1840.4 1840.6 1840.8 1841 1841.2 1841.4 1841.6 1841.8 1842 1842.2 1842.4 1842.6
Frequency list NHM-5 GSM1800 VCO TX VCO RX CH TX RX VCO TX 3458 3648 700 1747.8 1842.8 3495.6 3458.4 3648.4 701 1748 1843 3496 3458.8 3648.8 702 1748.2 1843.2 3496.4 3459.2 3649.2 703 1748.4 1843.4 3496.8 3459.6 3649.6 704 1748.6 1843.6 3497.2 3460 3650 705 1748.8 1843.8 3497.6 3460.4 3650.4 706 1749 1844 3498 3460.8 3650.8 707 1749.2 1844.2 3498.4 3461.2 3651.2 708 1749.4 1844.4 3498.8 3461.6 3651.6 709 1749.6 1844.6 3499.2 3462 3652 710 1749.8 1844.8 3499.6 3462.4 3652.4 711 1750 1845 3500 3462.8 3652.8 712 1750.2 1845.2 3500.4 3463.2 3653.2 713 1750.4 1845.4 3500.8 3463.6 3653.6 714 1750.6 1845.6 3501.2 3464 3654 715 1750.8 1845.8 3501.6 3464.4 3654.4 716 1751 1846 3502 3464.8 3654.8 717 1751.2 1846.2 3502.4 3465.2 3655.2 718 1751.4 1846.4 3502.8 3465.6 3655.6 719 1751.6 1846.6 3503.2 3466 3656 720 1751.8 1846.8 3503.6 3466.4 3656.4 721 1752 1847 3504 3466.8 3656.8 722 1752.2 1847.2 3504.4 723 1752.4 1847.4 3504.8 3467.2 3657.2 3467.6 3657.6 724 1752.6 1847.6 3505.2 3468 3658 725 1752.8 1847.8 3505.6 3468.4 3658.4 726 1753 1848 3506 3468.8 3658.8 727 1753.2 1848.2 3506.4 3469.2 3659.2 728 1753.4 1848.4 3506.8 3469.6 3659.6 729 1753.6 1848.6 3507.2 3470 3660 730 1753.8 1848.8 3507.6 3470.4 3660.4 731 1754 1849 3508 3470.8 3660.8 732 1754.2 1849.2 3508.4 3471.2 3661.2 733 1754.4 1849.4 3508.8 3471.6 3661.6 734 1754.6 1849.6 3509.2 3472 3662 735 1754.8 1849.8 3509.6 3472.4 3662.4 736 1755 1850 3510 3472.8 3662.8 737 1755.2 1850.2 3510.4 3473.2 3663.2 738 1755.4 1850.4 3510.8 3473.6 3663.6 739 1755.6 1850.6 3511.2 3474 3664 740 1755.8 1850.8 3511.6 3474.4 3664.4 741 1756 1851 3512 3474.8 3664.8 742 1756.2 1851.2 3512.4 3475.2 3665.2 743 1756.4 1851.4 3512.8 3475.6 3665.6 744 1756.6 1851.6 3513.2 3476 3666 745 1756.8 1851.8 3513.6 3476.4 3666.4 746 1757 1852 3514 3476.8 3666.8 747 1757.2 1852.2 3514.4 3477.2 3667.2 748 1757.4 1852.4 3514.8 3477.6 3667.6 749 1757.6 1852.6 3515.2 3478 3668 750 1757.8 1852.8 3515.6 3478.4 3668.4 751 1758 1853 3516 3478.8 3668.8 752 1758.2 1853.2 3516.4 3479.2 3669.2 753 1758.4 1853.4 3516.8 3479.6 3669.6 754 1758.6 1853.6 3517.2 3480 3670 755 1758.8 1853.8 3517.6 3480.4 3670.4 756 1759 1854 3518 3480.8 3670.8 757 1759.2 1854.2 3518.4 3481.2 3671.2 758 1759.4 1854.4 3518.8 3481.6 3671.6 759 1759.6 1854.6 3519.2 3482 3672 760 1759.8 1854.8 3519.6 3482.4 3672.4 761 1760 1855 3520 3482.8 3672.8 762 1760.2 1855.2 3520.4 3483.2 3673.2 763 1760.4 1855.4 3520.8 3483.6 3673.6 764 1760.6 1855.6 3521.2 3484 3674 765 1760.8 1855.8 3521.6 3484.4 3674.4 766 1761 1856 3522 3484.8 3674.8 767 1761.2 1856.2 3522.4 3485.2 3675.2 768 1761.4 1856.4 3522.8 3485.6 3675.6 769 1761.6 1856.6 3523.2 3486 3676 770 1761.8 1856.8 3523.6 3486.4 3676.4 771 1762 1857 3524 3486.8 3676.8 772 1762.2 1857.2 3524.4 3487.2 3677.2 773 1762.4 1857.4 3524.8 3487.6 3677.6 774 1762.6 1857.6 3525.2 3488 3678 775 1762.8 1857.8 3525.6 3488.4 3678.4 776 1763 1858 3526 3488.8 3678.8 777 1763.2 1858.2 3526.4 3489.2 3679.2 778 1763.4 1858.4 3526.8 3489.6 3679.6 779 1763.6 1858.6 3527.2 3490 3680 780 1763.8 1858.8 3527.6 3490.4 3680.4 781 1764 1859 3528 3490.8 3680.8 782 1764.2 1859.2 3528.4 783 1764.4 1859.4 3528.8 3491.2 3681.2 3491.6 3681.6 784 1764.6 1859.6 3529.2 3492 3682 785 1764.8 1859.8 3529.6 3492.4 3682.4 786 1765 1860 3530 3492.8 3682.8 787 1765.2 1860.2 3530.4 3493.2 3683.2 788 1765.4 1860.4 3530.8 3493.6 3683.6 789 1765.6 1860.6 3531.2 3494 3684 790 1765.8 1860.8 3531.6 3494.4 3684.4 791 1766 1861 3532 3494.8 3684.8 792 1766.2 1861.2 3532.4 3495.2 3685.2 793 1766.4 1861.4 3532.8
VCO RX 3685.6 3686 3686.4 3686.8 3687.2 3687.6 3688 3688.4 3688.8 3689.2 3689.6 3690 3690.4 3690.8 3691.2 3691.6 3692 3692.4 3692.8 3693.2 3693.6 3694 3694.4 3694.8 3695.2 3695.6 3696 3696.4 3696.8 3697.2 3697.6 3698 3698.4 3698.8 3699.2 3699.6 3700 3700.4 3700.8 3701.2 3701.6 3702 3702.4 3702.8 3703.2 3703.6 3704 3704.4 3704.8 3705.2 3705.6 3706 3706.4 3706.8 3707.2 3707.6 3708 3708.4 3708.8 3709.2 3709.6 3710 3710.4 3710.8 3711.2 3711.6 3712 3712.4 3712.8 3713.2 3713.6 3714 3714.4 3714.8 3715.2 3715.6 3716 3716.4 3716.8 3717.2 3717.6 3718 3718.4 3718.8 3719.2 3719.6 3720 3720.4 3720.8 3721.2 3721.6 3722 3722.4 3722.8
CH
794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885
TX 1766.6 1766.8 1767 1767.2 1767.4 1767.6 1767.8 1768 1768.2 1768.4 1768.6 1768.8 1769 1769.2 1769.4 1769.6 1769.8 1770 1770.2 1770.4 1770.6 1770.8 1771 1771.2 1771.4 1771.6 1771.8 1772 1772.2 1772.4 1772.6 1772.8 1773 1773.2 1773.4 1773.6 1773.8 1774 1774.2 1774.4 1774.6 1774.8 1775 1775.2 1775.4 1775.6 1775.8 1776 1776.2 1776.4 1776.6 1776.8 1777 1777.2 1777.4 1777.6 1777.8 1778 1778.2 1778.4 1778.6 1778.8 1779 1779.2 1779.4 1779.6 1779.8 1780 1780.2 1780.4 1780.6 1780.8 1781 1781.2 1781.4 1781.6 1781.8 1782 1782.2 1782.4 1782.6 1782.8 1783 1783.2 1783.4 1783.6 1783.8 1784 1784.2 1784.4 1784.6 1784.8
RX 1861.6 1861.8 1862 1862.2 1862.4 1862.6 1862.8 1863 1863.2 1863.4 1863.6 1863.8 1864 1864.2 1864.4 1864.6 1864.8 1865 1865.2 1865.4 1865.6 1865.8 1866 1866.2 1866.4 1866.6 1866.8 1867 1867.2 1867.4 1867.6 1867.8 1868 1868.2 1868.4 1868.6 1868.8 1869 1869.2 1869.4 1869.6 1869.8 1870 1870.2 1870.4 1870.6 1870.8 1871 1871.2 1871.4 1871.6 1871.8 1872 1872.2 1872.4 1872.6 1872.8 1873 1873.2 1873.4 1873.6 1873.8 1874 1874.2 1874.4 1874.6 1874.8 1875 1875.2 1875.4 1875.6 1875.8 1876 1876.2 1876.4 1876.6 1876.8 1877 1877.2 1877.4 1877.6 1877.8 1878 1878.2 1878.4 1878.6 1878.8 1879 1879.2 1879.4 1879.6 1879.8
VCO TX 3533.2 3533.6 3534 3534.4 3534.8 3535.2 3535.6 3536 3536.4 3536.8 3537.2 3537.6 3538 3538.4 3538.8 3539.2 3539.6 3540 3540.4 3540.8 3541.2 3541.6 3542 3542.4 3542.8 3543.2 3543.6 3544 3544.4 3544.8 3545.2 3545.6 3546 3546.4 3546.8 3547.2 3547.6 3548 3548.4 3548.8 3549.2 3549.6 3550 3550.4 3550.8 3551.2 3551.6 3552 3552.4 3552.8 3553.2 3553.6 3554 3554.4 3554.8 3555.2 3555.6 3556 3556.4 3556.8 3557.2 3557.6 3558 3558.4 3558.8 3559.2 3559.6 3560 3560.4 3560.8 3561.2 3561.6 3562 3562.4 3562.8 3563.2 3563.6 3564 3564.4 3564.8 3565.2 3565.6 3566 3566.4 3566.8 3567.2 3567.6 3568 3568.4 3568.8 3569.2 3569.6
VCO RX 3723.2 3723.6 3724 3724.4 3724.8 3725.2 3725.6 3726 3726.4 3726.8 3727.2 3727.6 3728 3728.4 3728.8 3729.2 3729.6 3730 3730.4 3730.8 3731.2 3731.6 3732 3732.4 3732.8 3733.2 3733.6 3734 3734.4 3734.8 3735.2 3735.6 3736 3736.4 3736.8 3737.2 3737.6 3738 3738.4 3738.8 3739.2 3739.6 3740 3740.4 3740.8 3741.2 3741.6 3742 3742.4 3742.8 3743.2 3743.6 3744 3744.4 3744.8 3745.2 3745.6 3746 3746.4 3746.8 3747.2 3747.6 3748 3748.4 3748.8 3749.2 3749.6 3750 3750.4 3750.8 3751.2 3751.6 3752 3752.4 3752.8 3753.2 3753.6 3754 3754.4 3754.8 3755.2 3755.6 3756 3756.4 3756.8 3757.2 3757.6 3758 3758.4 3758.8 3759.2 3759.6
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NHM-5NX RF Troubleshooting
PAMS Technical Documentation
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In general, if phone is not in a sleep mode, Hagar chip is always active. This means that, as long as we have set the phone in Normal mode or in Local mode (either RX or TX band ) there is going to be some Hagar activities, which is controled through serial interface (SDATA,SCLK,SENA and HAGAR_RESET_X). Pictures below show these four signals, measured on R301 (both SCLK and SENA) , on R300 (SDATA) and C540 (HAGAR_RESET_X). R301 and R300 are placed in BB part.
Figure 3. SCLK - clock signal
Figure 4. SENA - enable signal
Figure 5. SDATA - data signal
Figure 6. HAGAR_RESET_X - hagar reset "on"
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PAMS Technical Documentation
NHM-5NX RF Troubleshooting
First precondition for Hagar to be in active (ON) mode is that HAGAR_RESET_X should be high (2.8V) and VREF, which is Hagar reference voltage, at 1.35V. Easiest way to check these two voltages is by using oscilloscope with an standard passive probe (10k/8pF). HAGAR_RESET_X is measured on C540 and VREF on C536. Another " good spot" to check if Hagar's internal supplies are active, is to measure either on capacitor C538 or resistor R511. R511 is Hagar connection for a external resistor in order to create inernal bias currents. This volage should be excactly the same value as VREF on C536. Next step towards examination of the the Hagar functionality can be based on verification of some important bias voltages and bias controls. Those signal coming from Hagar and they are used for controling the LNA's biasing(both 900/1800MHz), LNA power supply and TX power detector . As a reference, here is a list of some typical test points for both Rx and Tx mode:
Frequency Band EGSM
RX
² 900 LNA bias control - L506 (pulses with 2.34V ) ² 900 LNA power supply control R514( pulses with 2.75V)
TX
² supply for the 900 PA buffer R606 (pulses with 2.34V) ² bias voltage for power detector C573 ( "high" 2.8V) ² bias voltage for power detector C573 ( "high" 2.8V)
PCN
² 1800 LNA bias control R502 (pulses with 2.34V) ² 1800 LNA power supply control R513( pulses with 2.75V)
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NHM-5NX RF Troubleshooting
PAMS Technical Documentation
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Prior to any tuning the phone should be initialised: Start Wintesla-Service-Software and Select Product Open... NHM-5 Select: Product Initialise Normal Mode Alt+p Alt+I F5 Alt+p
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Different repairs require different tuning. In general it is necessary to determine in which section the repair was done to establish which tunings to perform. To determine if RF tuning is necessary after repair it is important that the functionality of the repaired circuit is understood well. In case the circuit is not fully understood it might be wise to play it safe and do RF tunings in accordance with the table below. In general repairs in the TX part will require tuning of "TX Power" and "TX I/Q" tuning. In general repairs in the RX part or PLL will always require "RX Calibration" and in some cases require AM Suppression tuning (Automatic) and RX Filter Calibration (Automatic). Other parts interfacing to TX, RX or PLL might require tuning, but common sense should be used. In the table below guidelines for what to tune when can be seen (if it can be ruled out that a component will change RF performance, e.g. the microphone B200 there is no need to do any RF tuning).
Required tuning Repairs affecting component number 100-199 200-399 400-499 500-599 600-699 Full factory setting Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes RX calibration Yes Yes AM suppression RX filter calibration TX power TX IQ
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PAMS Technical Documentation
NHM-5NX RF Troubleshooting
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The "RX calibration" is used to determine gain at different gain-settings for front-end and Hagar and needs to be done in both bands, but the calibration only have to be started once, it will automatically proceed to the PCN band after EGSM. Select: Product Band EGSM Select: Tuning Alt+t r Alt+p b e
RX Calibration A window will now pop-up:
Connect an external generator to the phones RF connector and set the generator as the window tells you. Click OK in the Wintesla window, now a new window pops up:
Change the level on the generator as the window tells you.
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NHM-5NX RF Troubleshooting
Click OK in the Wintesla window, now a new window pops up:
PAMS Technical Documentation
Click Save in the Wintesla window, now a new window pops up:
Change the level and frequency on the generator as the window tells you. Click OK in the Wintesla window, now a new window pops up:
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PAMS Technical Documentation
NHM-5NX RF Troubleshooting
Change the level and frequency on the generator as the window tells you. Click OK in the Wintesla window, now a new window pops up:
Click Save in the Wintesla window, RX Calibration is now completed
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This calibration is calibrating the Baseband filter inside Hagar, for this reason the calibration is not done in both bands.
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NHM-5NX RF Troubleshooting
PAMS Technical Documentation
Select:
Tuning
Alt+t
RX Measurements A window now pops-up:
In the "Select Function" frame select RX "Filter calibration (Automatic)". No external signal is needed for this, just click "Measure", wait a few seconds and then click "Save Defaults" RX filter calibration is now completed and the "RX Measurements" window can be closed by clicking "Close"
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This calibration is tuning the AM suppression performance of Hagar mixers and will have to be done in both bands. If flash or Hagar has been replaced or Full Factory settings have been performed RX AM Suppression must be done.
*60
Select: Product Band EGSM Select: Tuning Alt+t Alt+p b e
RX Measurements
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PAMS Technical Documentation
NHM-5NX RF Troubleshooting
A window now pops-up:
In the "Select Function" frame select RX "RX AM Suppression (Automatic)".
Click Measure, A window now pops-up:
Connect an external generator to the antenna connector of the phone and set-up the generator. Click OK in the Winteslwindow, the RSSI value is updated in the RX Measurements window. Click "Save ". The "RX AM suppression tuning" is now completed in GSM900.
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NHM-5NX RF Troubleshooting 3&1
Select: Product Band PCN Select: Tuning Alt+t Alt+p b p
PAMS Technical Documentation
RX Measurements
A window now pops-up:
In the "Select Function" frame select RX "RX AM Suppression (Automatic)". Click Measure, A window now pops-up:
Connect an external generator to the antenna connector of the phone and set-up the generator.
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PAMS Technical Documentation
NHM-5NX RF Troubleshooting
Click OK in the Wintesla window, the RSSI value is updated in the RX Measurements window.
Click "Save ". The "RX AM suppression tuning" is now completed in PCN.
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This tuning must be done in both bands.
*60
Select: Product Band EGSM Select: Testing RF Controls A window now pops-up: Alt+p b e Alt+e r
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NHM-5NX RF Troubleshooting
PAMS Technical Documentation
Set Active unit to TX Set TX Data Type: to Rand Click Apply Click Close
Select:
Tuning
Alt+t Alt+P
TX Power... A window now pops-up:
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PAMS Technical Documentation
NHM-5NX RF Troubleshooting
Tune