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PAMS Technical Documentation NSW-4 Series Transceivers
Disassembly & Troubleshooting
Issue 1 Final Draft 08/00
E Nokia Mobile Phones Ltd.
NSW-4 Disassembly & Troubleshooting
PAMS Technical Documentation
AMENDMENT RECORD SHEET
Amendment Date Number Inserted By OJuntune Comments Issue 1
08/00
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NSW-4 Disassembly & Troubleshooting
CONTENTS Page No
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baseband Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phone is totally dead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flash programming doesn't work . . . . . . . . . . . . . . . . . . . . . . . Power doesn't stay on or the Phone is jammed . . . . . . . . . . . The phone doesn't register to the network . . . . . . . . . . . . . . . Charging failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RF Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Abbreviations used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interface signals between RF and BB/DSP . . . . . . . . . . . . . . . Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General instructions for RX troubleshooting . . . . . . . . . . . . . . Path of the received signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AMPS RX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TDMA800RX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TDMA 1900RX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Instructions for TX Troubleshooting . . . . . . . . . . . Path of the transmitted signal . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting diagrams for TX . . . . . . . . . . . . . . . . . . . . . . . AMPS TX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TDMA800 TX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TDMA1900 TX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power control loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Synthesizers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.44 MHz Reference oscillator . . . . . . . . . . . . . . . . . . . . . . 58.32 MHz Triple Multiplier . . . . . . . . . . . . . . . . . . . . . . . . . . 19.44 MHz oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VHF VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AMPS& TDMA800 UHF SYNTHESIZER . . . . . . . . . . . . . . TDMA1900 UHF SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . RF ASIC DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EROTUS ASIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RX Front ends N701 and N721 . . . . . . . . . . . . . . . . . . . . . . Power Amplifiers N903 & N960 . . . . . . . . . . . . . . . . . . . . . . PENTA regulator N702 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E Nokia Mobile Phones Ltd. 5 10 10 11 12 13 14 15 17 18 18 19 20 24 24 24 24 26 29 31 31 33 34 34 36 37 39 40 40 40 41 43 44 45 46 46 46 46 47 48
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TDMA1900 UPCONVERTER N980 . . . . . . . . . . . . . . . . . . . TDMA1900 PLLcircuit N870 . . . . . . . . . . . . . . . . . . . . . . . . Warranty transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
48 49 50
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Disassembly
1. Remove battery
2. Remove the antenna cover by using the ART9 antenna removal tool. Place the ART9 flat side down in the battery recess of the phone in the top left hand corner. The extruding "finger" slides in the hole next to the battery springs and when pushing the tool the antenna is released for removal E Nokia Mobile Phones Ltd.
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3. Remove screws from the back of the phone.
4. Open covers.
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5. Remove shield screws (2 pcs)
6. Remove shield.
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7. Remove main PWB
8. Remove keyboard spacer.
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9. Remove UI board
10. Separate parts from cover.
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Baseband Testing
The MCU software enters a local mode at start-up if suitable resistors are connected to the BTEMP and BSI lines. NOTE! Baseband doesn't wake up automatically when the battery voltage is connected. Power must be switched on via: 1. Pwr key or 2. BTEMP line or 3. Charger 4. Connecting J150 to ground
Alignments
Within alignment those parameters are adjusted, that cannot be set accurate enough by design, because of component tolerances. Due to use of 5% resistor values, the channels of the CCONT A/D converters need to be aligned in the production phase. Within battery voltage tuning VBAT the MCU software reads the A/D reading from CCONT at 4.1 V and stores this reading to EEPROM (emulated by Flash) memory as a reference point. Then second reading is done at 3.1 V. Now the slope is known and A/D readings can be calibrated. Calibration is included in VBAT A/D reading task. Battery charging voltage VCHAR and current ICHAR are calibrated using one test setting. Test jig in production line must have a connection to battery terminals. ICHAR is adjusted to 500 mA and VCHAR to 8.4 V with appropriate load connected to the battery terminals.
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Trouble Shooting
The following hints should facility finding the cause of the problem when the circuitry seems to be faulty. This trouble shooting instruction is divided following section. 1. Phone is totally dead 2. Flash programming does not work 3. Power does not stay on or the phone is jammed 4. Display information: Contact Service 5. Phone does not register to the network or phone does not make a call. 6. Audio fault. 7. Charging fault The first thing to do is carry out a through visual check of the module. Ensure in particular that: a) there are not any mechanical damages b) soldered joints are OK
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Phone is totally dead
This means that phone doesn't take current at all when the power switch is pressed or when the watchdog disable pin (X101 pin 11 or J150) is grounded. Used battery voltage must be higher than 3.0 V. Otherwise the hardware of CCONT (N150) prevents totally switching power on. Here the VBat is set to 3.6V
Phone is totally dead
YES NO
VBat=3.6V at R153
YES NO
Failure in VBat line, check X100
Voltage at J150 of CCONT (N150) = 3.6V
YES
Faulty circuit N150
C166 (VBB) = 2.8V C158 (VR1) = 2.8V when PWR switch pressed or watchdog disable pin grounded
YES
NO
CCONT(N150) J150 = 0V when PWR switch pressed or watchdog disable pin (X101 pin 11) grounded
YES
NO
Check R160, PWR switch, connector X300 Check watchdog disable line X101
See section: Power does not stay on
Faulty circuit N160
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Flash programming doesn't work
The flash programming is carried out via the pads accessible from the back of the phone (using service accessories).
Flash programming doesn't work
YES
VBAT > 3.0 V VBB (C166) 2.8 V VR1 (C158) 2.8 V
YES
NO
See section "Phone is totally dead"
PURX (J140) master reset="1"(2.8V)
YES
NO
Sleep clock SLCLK (J157) square wave 32 kHZ
YES
NO
Check sleepclock circuitry C154, C155, C190
FLASH (D201) VBB is 2.8V (C203), SRAM (D200) VBB is 2.8 V (C200), FLASH VPP is > 2.8 V (C202)
YES
Faulty circuit N150 or over loaded PurX line
RFC (J250) 19.44 MHz sine wave Clock signal: 700mV Vpp typ. COBBACLK (J210) 9.72MHz sq.wave clock signal 2.80 Vpp
OK
NO
check VCXO G850
Check the following lines: FBUSTXD line: J114>MAD1 FBUSRXD line: J113>MAD1 M2BUS line: J112 to MAD1
Check also pullup and pulldown resistors R209, R210, R212 OK
Check control lines of SRAM and FLASH: e.g. there is voltage spikes when trying to write and read something to SRAM and FLASH RAMSelX (J207), RPMSelX (J208) MCURDX and MCUWRX (X200 pins 19 and 18)
OK
There could be open pins in circuits D200, D201, D202 (open joints may be detectable with microscope). If not the PCB or D202, D200, D201, N150 is faulty
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Power doesn't stay on or the Phone is jammed
If this kind of fault has come after flash programming, there are most probably open pins in ICs. The solder joints of ICs: MAD1 (D202), Flash (D201) and SRAM (D200) are to be checked at the extent possible (by microscope from the side of PCB and lightly pressing components while switching power on). Normally the power will be switched off by CCONT (N150) after 32 seconds, if the watch-dog of the CCONT can not be served by software. The watch-dog updating can be seen by oscilloscope at J154 (DataselX) of CCONT. In normal case there is a short pulse from "1" > 0 every 8 seconds. The power off function of CCONT can be prevented by connecting a short circuit wire from WDDISX (CCONT E4 (J150)) to ground (J151).
Power doesn't stay on or phone is jammed
YES
CCONT (N150) watchdog is served? J154 pulses 1 > 0)
YES
Software is able to run If power is switched off after few seconds, check BSI (X100 to C167) and BTEMP (X100 to C168) lines
Connect short circuit wire from Watchdog J150 to ground J151
OK YES NO
FLASH (D201) VBB is 2.8V (C203)
YES
VBAT is OK = 3.8V
N150 is faulty
NO NO
PURX (J152) master reset = "1" (2.8 V)
Sleep clock SLCLK square wave 32 kHz
YES
check sleep clock circuitry (B150, R157...)
YES
Faulty circuit N150 or over loaded PURX line RFC (J255) 19.44 MHz sine wave
NO
Clock signal: 700 mV Vpp typ. COBBACLK (J210) 9.72 MHz square wave clock signal 2.80 Vpp
YES
Check VCXO G850
Open pins or faulty circuit: D202, D200, D201, N150
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The phone doesn't register to the network or phone doesn't make a call
If the phone doesn't register to the network or the phone doesn't make a call, the reason could be either the baseband or the RF part. The phone can be set to wanted mode by WinTesla service software and determinate if the fault is in RF or in baseband part (RF interface measurements). The control lines for RF part are supplied both the System Asic (MAD D202) and the RFI (Cobba N250). MAD handles digital control lines and Cobba handles analog control lines. Diagram is on the next page.
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Phone doesn't register to the network or phone doesn't make a call
YES
Analog supply voltage VR6 is > 2.7 V of Cobba (N250) at C275
YES
NO
Check N250
Analog reference voltage Vref is 1.5 of Cobba (N250) at C169
YES
NO
Check R256
Check supply voltages for RF: RX: VR1 (C158), VR2 (C159), VR3 (C160), VR4 (C161), VR5 (C162), VR8 (N702 pin 14), VR9 (N702 pin 13), VR10 (N702 pin 12) and V5V (C176) NO TX: VR3 (C160), VR7 (C164), VR7_bias (R901), VR11 (N702 pin 11), VR12 (N702 pin 9) and TXPWR3 (C903)
YES
Check CCONT N150 MAD D202
Synthesizer lines: SENA2 (N880 pin 13) SCLK (N880 pin 11) SDATA (N880 pin 12) pulses 0 > 1 during off burst
YES
NO
MAD D202
AGC1 (R758) 0 > 2.3V max. during receiving burst AFC (R850) 0 > 1.2V typ. During receiving burst
YES
NO
COBBA N250
Digital data signal IF2AN (R789) >0.6Vpp, 0>2.2V DC Digital data signal IF2AP (R788) >0.6Vpp, 0>2.2V DC Digital data signal IF2DN (C750) >170 mVpp typ, 0>2.7V DC Digital data signal IF2DP (C751) >170 mVpp typ, 0>2.7V DC Frequency is 450MHz
YES NO
NO
Check COBBA N250 if DC fails Check RFpart if analog signal fails
DAX signal (J211) pulses1>0 during receiving slot
YES
Check N250
TX control lines: TXC (N750 pin 1, R752) 0 > 2.3 Vmax during transmit burst TXA (N750 pin 2, R751) goes 0>1 (2.8 V) during modulation TXLX1 (R934 pin 1) and TXLX2 (R934 pin 2) 0> 1 (2.8 V)
NO
Check COBBA N250 if TXC fails Check MAD D202 if TXA fails
YES NO
Analog data signals : TXIN 0>0.8V DC during transmit slot TXIP 0>0.8V DC during transmit slot TXQN 0>0.8V DC during transmit slot TXQP 0>0.8V DC during transmit slot
YES
Check N250
Used max, frequency is 12 kHz max
Check RFpart
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Charging failure
Nothing happens when charger is connected
YES
Voltage level at VCHARpin of CCONT is higher than 0.17 V when charger is connected
YES
NO
Check X102, R158, R160, F150
Check N150 Display Information: Not charging
YES
Voltage level at C165 is about 0.8 V when power is connected BSI resistor value should be 18 k
YES
NO
Check R158, R163
Voltage level at C168 is about 0.5 V when power is connected BTEMP resistor value should be 47 k
YES
NO
Check R163, R161
32 Hz square wave frequency at R150 if ACP9U charger is connected, 1 Hz square wave frequency if ACP7U or ACP8 is connected
YES
NO
Check N150
NO
Voltage levels at R153 are same as VBAT (C180)
YES
Check R153, N151
Voltage levels at R153 rises when charger is connected
NO
Faulty N151
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RF Troubleshooting
Introduction
Measurements are done using a spectrum analyzer and a highfrequency probe (Local and reference frequencies and RFpower levels in intermediate stages of TX/RXchains). An oscilloscope is used to measure DCvoltages and low frequency signals. A multimeter is also a useful measurement instrument in fault finding. An external RF connector is assembled only on R&D and calibration panels for FLALI improving reliability of the measurement results, and it should be in use when it is possible. Later on soldering pads for this connector will be removed from the layout, therefore a connector to the antenna pad needs to be soldered manually. The RF section is mainly built around EROTUSIC (N700). The RF block has separate external filters, UHF synthesizers, Power Amplifiers, TX Driver amplifiers, LNA/Mixer and upconverter circuit for both frequency bands. In TDMA1900 mode a RF regulator IC is provided to supply voltage for RF parts. To simplify troubleshooting, this RF troubleshooting document is divided into three bigger sections: Receiver, Transmitter and Synthesizer blocks. The tolerances are specified for critical signals/voltages. Before changing single ASICS or components, please check the following things: 1. 2. The soldering and connections of pins of ASICS That supply voltages and control signals are OK
3. Signals from the synthesizers are coming to ASICS. This will prevent unnecessary changing of ASICS. Please note that the grounding of the Power AmplifierIC is directly underneath, so it is difficult to check. The PA is ESD sensitive! So ESD precaution must be used when dealing with the PAIC (ground straps and ESD soldering irons). The PAs are also moisture sensitive components, and it is important to follow additional information about handling the components. There are also lots of discrete components (resistors, inductors and capacitors) the troubleshooting of which is done just by checking that component is soldered or that it is not missing from the PCB. AAX-2 tool is used to provide galvanic contact for RF measurements, kindly refer to the figure on the next page.
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AAX2
Abbreviations used
BB f IF LO P PA PCB PLL RF RX T TX UHF V VCO VHF AF Baseband Frequency of signal (measured with spectrum analyzer) Intermediate Frequency Local Oscillator Power of signal in decibels compared to a milliwatt (dBm) (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 Audio Frequency E Nokia Mobile Phones Ltd.
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Interface signals between RF and BB/DSP
Signal name VBAT From Battery RF To Parameter Voltage Min 3.1 Typ 3.6 Max 5.3 Unit V Function Supply voltage for RF and regulators Reference voltage for EROTUS RF temperature sensor 47k NTC to GND
VREF RFTEMP
CCONT RF
EROTUS CCONT
Voltage Voltage
1.478 0 HOT
1.500 1.4 ROO M TEMP 1.1
1.523 2.7 COLD
V V
AFC AGC1
COBBA_D
VCTCXO
Voltage Voltage
0.05 0.5
2.25 1.4
V V
Automatic frequency control Gain control for EROTUS RX AGC LNA Gain switch "1" min 2.0 V "0" max 0.7 V
Cobba_D EROTUS
AGC2
MAD
RX LNA
Voltage
0
2.85
V
PD1
EROTUS VHF VCO Voltage
0 1.0 2.8 1.5 3.3
4.0 2.0 3.8 3.5 2.85
V V V V V
VCO control voltage 322.38 MHz 392.46 MHz 1 GHz "0" AMPS "1" TDMA
PD2 MODE
EROTUS 1GHz Voltage UHF VCO MAD 1Ghz PA bias switch Voltage
1.3 0
IF2AP/ IF2AN
EROTUS COBBA_D
Voltage/Frequency
0.6 / 450
Vpp / kHz 1400 mVpp / kHz V V V V V
Differential limiter output to DEMOFM demodulator Differential IF2signal to RX A/Dconverter 1 Ghz PLL enable Synthesizer data Synthesizer clock
IF2DP / IF2DN SENA1
EROTUS COBBA_D MAD EROTUS
Voltage/Frequency Logic high "1" Logic low "0" 2.0 0 2.0 0 2.0
170 / 450
2.85 0.8 2.85 0.8 2.85
SDATA SCLK
MAD MAD
EROTUS EROTUS
Logic high "1" Logic low "0" Logic high "1"
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Signal name RFC RFCEN
From
To
Parameter Logic low "0"
Min 0 0.2 0
Typ
Max 0.8
Unit V Vpp / MHz V
Function
EROTUS COBBA_D MAD CCONT / PENTA regulator COBBA_D
Voltage/Frequency Voltage
0.4 / 19.44
1.0 2.85
Clock signal for the logic circuits "1" min 2.0 V "0" max 0.4 V
RSSI
EROTUS CCONT/
Output level
0.1
1.5
V
Analog mode field strength indicator Differential in phase TX baseband signal for the RF modulator
TXIP/ TXIN
COBBA
EROTUS
Differential voltage swing (static)
1.022
1.1
1.18
Vpp
Single ended output level TXQP/ TXQN COBBA EROTUS Same as TXIP/TXIN
0.760
0.8
0.84
V Differential quadrature phase TX baseband signal for the RF modulator
TXP1
MAD
CCont
Logic high "1" Logic low "0"
2.0 0.5 10
V V bits
1 Ghz Transmitter enable VR7 ON/OFF Transmitter power control (ramps & power levels)
TXC
COBBA
EROTUS
Number of bits
Output voltage swing Minimum code output level Maximum code output level TXF EROTUS MAD Voltage
2.09 0.12
2.15 0.15
2.21 0.18
V V
2.27
2.3
2.33
V
0
2.85
V
False transmission indicator, function controlled via EROTUS register 2 Ghz Transmitter enable VR11 ON/OFF PWR control loop during TX burst (slow mode)
TXP2
MAD
PENTA regulator EROTUS
Logic high "1" Logic low "0"
2.0 0.5 2.5
V V V
TXA
MAD
Logic high "1"
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Signal name
From
To
Parameter Logic low "0"
Min
Typ
Max 0.2
Unit V
Function PWR control loop during ramp up/down (fast mode) Low power level mode for power detector High power level mode for power detector Low power level mode for power detector High power detector mode power detector 2 Ghz PLL enable
TXLX1
MAD
TX 800
Logic high "1"
2.1
2.85
V
Logic low "0"
0
0.6
V
TXLX2
MAD
TX 1900
Logic high "1"
2.1
2.85
V
Logic low "0"
0
0.6
V
SENA2
MAD
2 Ghz UHF PLL
Logic high "1" Logic low "0"
2.0 0 2.0 0 2.0 0 2.0 0
2.85 0.8
V V V
RXPWR1
MAD
CCONT
Logic high "1" Logic low "0"
VR4 ON VR4 OFF VR8 ON, 1Ghz frontend VR8 OFF VR9 ON 2Ghz frontend VR9 OFF
0.8
V V
RXPWR2
MAD
PENTA
Logic high "1" Logic low "0"
0.8
V V
RXPWR3
MAD
PENTA
Logic high "1" Logic low "0"
0.8
V
SPWR1
COBBA_D
CCONT
Logic high "1" Logic low "0"
2.0 0 2.0 0 2.0 0 2.0 0.5 0.5 0.5
V V V V V V V
VR2 ON , 1Ghz UHF VR2 OFF VR3 ON, VHF ON/OFF VR3 OFF VR10 ON , 2Ghz UHF VR10 OFF VR5 ON , TX pwr control enable VR5 OFF
SPWR2
COBBA_D
CCONT
Logic high "1" Logic low "0"
SPWR3
COBBA_D
PENTA
Logic high "1" Logic low "0"
TXPWR1
MAD
CCont
Logic high "1"
Logic low "0"
0
0.5
V
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Signal name TXWR2
From MAD
To PENTA
Parameter Logic high "1"
Min 2.0
Typ
Max
Unit V
Function VR12 ON , TDMA1900 TX upconverter enable VR12 OFF AMPS & TDMA800 TX upconverter enable TXUC disable Supply for VCTCXO, Erotus VHF prescaler and bias, and 2 GHz PLL Supply voltage for 1GHZ UHF VCO and prescaler Supply voltage for VHF VCO, LO buffer, 1 Ghz TXmixer and power detector Supply voltage for EROTUS IF parts and IFamplifier Supply voltage for EROTUS TX modulator and TX pwr control circuits Supply voltage for EROTUS digital parts and Cobba_D analog supply TX800 PA bias and driver amplifier supply voltage TX800 PA bias switching voltage "0"=AMPS "1"=TDMA
Logic low "0" TXWR3 MAD TDMA800 Logic high "1" TXupconverter Logic low "0" VR1 CCont RF Voltage
0 2.0
0.5
V V
0 2.7 2.8
0.5 2.85
V V
VR2
CCont
RF
Voltage
2.7
2.8
2.85
V
VR3
CCont
RF
Voltage
2.7
2.8
2.85
V
VR4
CCont
RF
Voltage
2.7
2.8
2.85
V
VR5
CCont
RF
Voltage
2.7
2.8
2.85
V
VR6
CCont
RF
Voltage
2.7
2.8
2.85
V
VR7
CCont
RF
Voltage
2.7
2.85
2.9
V
VR7_bias
CCont
RF
Voltage
2.7
2.85
2.9
V
V5V
CCont
EROTUS
Voltage
4.8
5.0
5.2
V
Erotus and 2 Ghz PLL chargepump
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Receiver
General instructions for RX troubleshooting Start the WinTeslasoftware and use it to start the desired RXmode of the mobile phone. The troubleshooting flowchart is divided into three steps, general checking, local checking and RXchain checking. Please notice that before changing ASICs or filters, all solderings and missing components are checked. IF any RXfilters and/or ASICs are changed, AGCtunings have to be made! Connect the desired channel frequency and level to the antenna interface. Path of the received signal Block level description of the receiver: Antenna Diplexer Duplexer Low Noise Amplifier (LNA) RX filter First mixer 116.19 MHz filter IFamplifier AGC/buffer second mixer 450 kHz filters buffer/limiter Baseband( FMdetector). AMPS RX Diagram on the next page.
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Apply 879.00 MHz 116dBm , 8kHz dev, 1 kHz sine signal to the antenna pad
Connect EXT HS to audioanalyzator, open audio AF: 1 kHz sine signal, meas SINAD AF: >12 dB N N N Check UHF Vcnt at C822 V: 2.0 ..3.5 V
Y AMPS RXchain OK
Start synthesizer troubleshooting
Y Check 3 multiplier output level C745 N700 V: >80 mVpp ? N Start synthesizer troubleshooting
Y Apply 879.00 MHz 50dBm , sine signal to antenna pad.
Note! Check input level at duplex filter (Z910) input P: 50 dBm Y Note! Change duplex filter or L701 Check all soldering and discrete components of frontend. N Change diplexer Z970 Check all soldering and components in antenna circuit before changing
Check input level at frontend (N701) input pin7 P:55dBm
N
Y N Check output level at LNA out pin10 P: >50 dBm Change N701 N Note! AG2 is on = gain is in low state
Y N Check MXR RF level pin12 P:55dBm Change RX band filter Z701 Note! Check all soldering
Y N Check MXR IF level, F= 116.19 MHz P:50dBm Check LO input level at N701, pin1 P 0dBm f=995.19 MHz
N Start synthesizer troubleshooting
Y
Y
Change N701
Note! Check all components around N701
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Check input of EROTUS IF ampli fier at R744 P:55dBm Y Check LIMIN1 level at C768
Note! N Check all components around filter Change Z741
Note ! N Check comp. R764 &C769 Check voltages around EROTUS
Y
Check LIMOUT1 output R788 : >300 mVpp
N Change EROTUS
Y Note ! N Check COBBA_D IF2A input at R774 Check comp. R788 , R789, L750, C780 and R774 Inductor L750 is not reciprocal, i.e 180 deg rotation will hurt SINAD! So, check placement from OK phone, or try to rotate.
AMPS TX continued above
TDMA800RX
Diagram on the next page.
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Apply 879.00 MHz 50dBm signal to antenna interface
NOTE! If AMPS RX check is OK, then only components in AGC1, OUT_rx, IN_rxif and OUT_rxif lines needs to be checked.
Y Check RF level of COBBA_D TDMA800 RXchain OK
N N N Check UHF VCO PD2 V: 2.0...3.5 V Start synthesizer troubleshooting
Y Check 3 multiplier output level at C745 V: >80 mVpp N Start synthesizer troubleshooting
Y Note! Check input level at duplex filter (Z910) input N Change diplexer Check all soldering and components in antenna circuit before changing
Y Note! Change duplex filter or L701 Check all soldering and discrete components of frontend.
N Check input level at frontend N701, pin7
Y N Check output level at LNA out, pin10 Change N701 N Note! AG2 is on = low gain state
Y N Check MXR RF level pin12 Change RX band filter Z701 Note! Check all solderings
Y N Check LO input level of of N701, pin1 f=995.19 MHz
Check MXR IF level, F= 116.19 MHz pin14,
N Start synthesizer troubleshooting
Y
Y Note! Change N701 Check all components around N701
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TDMA800 continued
Check input of EROTUS IF amplifier at R744 Note! N Check all components around filter Change Z741
Y Check INP_rxif level at R763 Note! N Change Filters Z750 &Z751 Check all components around filters
Y Check OUTP_rxif level at R798 Change capacitors N C750 & C751 Note ! Check all discrete components and supply voltages of EROTUS. Check also AGC1 line.
Change EROTUS
Y Check COBBA_D & start BB troubleshooting
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TDMA 1900RX
Apply 1960.02 MHz 50dBm signal to Antenna interface
NOTE! If RX800 is OK, then RX1900 troubleshooting should be concentrated only on Z960 and N721 area and surrounding components.
Y Check RF level of COBBA_D pin no 10 TDMA1900 RXchain is OK
N N Check UHF Vcnt N V: 2.0...3.5V N870, pin3 Y Check 3 multiplier output level at C745 V: >80 mVpp N Start synthesizer troubleshooting Y Note! Check input level of duplex filter (Z960) P: 50dBm N Change diplexer Z970 Check all soldering and components in antenna circuit before changing Start synthesizer troubleshooting
Y Note! Change duplex filter or L721 Check all soldering and discrete components of frontend.
N Check input level of frontend N721, pin7 P:55dBm
Y N Check output level at LNA out, pin10 P:50dBm Change N721 N Note! AG2 is on =low gain state
Y N Check MXR RF level pin12 P:55dBm Change RX band filter Z726 Note! Check all soldering
Y Check MXR IF level, F= 116.19 MHz, pin14 N Check input level of frontend N721, pin1 F=2076.21 MHz
N Start synthesizer troubleshooting
Y
Y
Note! Change N721 Check all components around of N721
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TDMA1900RX continued
Check input of EROTUS IF amplifier at R744 Note! N Check all components around filter Change Z741
Y Check INP_rxif level at R763 Note! N Change Filters Z750 &Z751 Check all components around filters
Y Check OUTP_rxif level at R798 Change capacitors N C750 & C751 Note ! Check all discrete components and supply voltages of EROTUS. Check also AGC1 line.
Change EROTUS
Y Check COBBA_D & start BB troubleshooting
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Transmitter
General Instructions for TX Troubleshooting
Always use RFcable connected from antenna interface to analyzer through an attenuator. This is important to protect analyzer against excessive rfpower and not to let any unwanted RF power leak to the cellular frequencies. Start the Wintesla software and select TX mode under testing (AMPS,DAMPS or TDMA1900). It is useful to select mid channel (383 for AMPS/DAMPS or 1000 for TDMA1900) and power level 2. Select random data for digital mode of operation. One of the basic test is to monitor current when transmitter is on. If current consumption does not change when transmitter is set on the fault is in the PA area. Nominal current consumptions on power level 2 in mid channel: AMPS: 550750 mA 300350 mA 350400 mA TDMA800: TDMA1900:
Also, if pressing the PA package more tightly to PCB does have an effect on current consumption the fault is in the PA. In case of a faulty PA, the replacement should be done only under correct ESD precaution and using a hot air gun set to 10m/s and 300 degrees centigrade. The new PA must be taken from a vacuum package and the heating process should be done in less than 30 seconds. Note, that the ground slug of the package must be properly soldered and excessive solder material, if any, has to be removed. If any components in the TX chain are replaced, the power level tunings have to be checked and retuned. Tuning targets are presented at next page. Set power supply voltage. Connect pulse power meter or spectrum analyzer. Use attenuator, if needed. Set settings for spectrum analyzer in power level tuning: Set span 0 Hz Set Ref LVL 30 dB Set Ref LVL offset and > Attenuation to Antenna Pad Set RBW and VBW 300 kHz Set sweep time 50 ms Set TRIG: SWEEP CONT, VIDEO 10 dBm E Nokia Mobile Phones Ltd.
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Set marker at middle of slot. Check that spectrum analyzer frequency is correct Set settings for pulse power meter Do calibration if needed. Set correct frequency Set Ref LVL offset > Attenuation to Antenna Pad Set correct duty cycle, 33,3 % in digital mode and 100 % at analog mode. Select Tuning > Using WinTesla Select Tuning > TX power > LowBand/HighBand >EEPROM values All four tuning channels have to be tuned. Repeat tuning for A, B, C and D tuning channel. Tuning channel change read old tuning values from phone's EEPROM. Adjust power level by clicking the + and buttons, power level change is done by keyboard keys and . Tune power levels, which are shown by "# for calculate" Press Calculate button to calculate other power levels. Check tuning, Do fine tuning if needed. Once all TX tuning channels are correct, press SAVE button. Tuning done, if both Analog mode and 800 MHz and 1900 MHz digital mode tuned. Difference between measured TX power from Test Pad of panel and Antenna Pad, must be taken care so that measurements from Antenna Pad give the correct results. 800MHz Analog TX output power
Power level 2 RF Power at ext. Antenna pad 22.0 dBm Tuning target tolerance +/ 0.1 dB Testing Limits +0.5... 0.5 dB 22.5 21.5 dBm
800MHz Digital TX output power
Power level 2 RF Power at ext. Antenna pad 26.8 dBm Tuning target tolerance +/ 0.1 dB Testing Limits +0.5/ 1.0 dB 27.3 25.8 dBm
3
4 5 6
23.5 dBm
20.0 dBm 16.0 dBm 12.0 dBm
+/ 1 dB
+/ 1 dB +/ 1 dB +/ 1 dB
+/ 2.0 dB
+/ 2.0 dB +/ 2.0 dB +/ 2.0 dB
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Power level 7 8 9 10
RF Power at ext. Antenna pad 8.0 dBm 4.0 dBm 0.0 dBm 4.0 dBm
Tuning target tolerance +/ 1 dB +/ 1 dB +/ 1 dB +/ 1 dB
Testing Limits +/ 2.0 dB +/ 2.0 dB +/ 2.0 dB +/ 2.0 dB
Check, that power level PL2 TXC DAC value is on allowed range +50...300. TDMA1900 TX output power
Power level 2 3 4 5 6 7 8 9 10 RF Power at ext. Antenna pad 25.9 dBm 23.0 dBm 20.0 dBm 16.0 dBm 12.0 dBm 8.0 dBm 4.0 dBm 0.0 dBm 4.0 dBm Tuning target tolerance +/ 0.1 dB +/ 1 dB +/ 1 dB +/ 1 dB +/ 1 dB +/ 1 dB +/ 1 dB +/ 1 dB +/ 1 dB Testing Limits +0.5... 1.0 dB 26.4 24.9 dBm +/ 2.0 dB +/ 2.0 dB +/ 2.0 dB +/ 2.0 dB +/ 2.0 dB +/ 2.0 dB +/ 2.0 dB +/ 2.0 dB
Check, that power level PL2 TXC DAC value is on allowed range +0...+250. Path of the transmitted signal AMPS/DAMPS Cobba TX I/Q DAC I/Qmodulator gain step amplifier linear gain control amplifier IF BPF Upconverter TX Driver amplifier BPF Power Amplifier Directional Coupler Duplexer Diplexer Antenna. TDMA1900D Cobba TX I/Q DAC I/Qmodulator gain step amplifier linear gain control amplifier IF BPF Upconverter BPF TX Driver amplifier BPF Power Amplifier Directional Coupler Duplexer Diplexer Antenna. Power detection and power control circuits are located under the power control part of this guide.
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Troubleshooting diagrams for TX
AMPS TX
Connect an RFcable to the antenna interface and connect the cable to a spectrum analyzer input. Start WinTeslasoftware and set the phone to Analog mode. Set channel 383 and Powerlevel 2 and measure RF ouput level. Please notice insertion loss of the cable and attenuations in the test jig or antenna adapter. It is recommended to use an external attenuator to avoid overloading the spectrum analyzer.
AMPS, PL2, CH383 Note! In AMPS mode PA pin 16 bias Voltage should be > 2.2V. Check Antenna Circuit and Duplexfilter. Chort circuit in PA? Check all supply voltages and solderings Check also N900 pin3 frequency and input power. Should be > 8 dBm and f = 997.68 MHz. If not start synth trouble shooting (TXLO is missing)
Y Check current consumption I: >700 mA
N Delamination means, that the chip has loosened inside the package during reflow.
Press down PA Inreasing current consumption ?
Y
Change PA Check possibility for delamination
N Check gain control voltage at C720 V: >2.5 V N Check TXC V: >1.5 V Y Start Power control troubleshooting N N Check Z901 filter insertion loss <4dB N TX driver input power P: > 20 dBm N Y Y Check C909, R905 and C910 Y Check PA input PWR P: > 0 dBm Y Change PA
Change driver N902
Check COBBA TXCDAC (BaseBand)
N
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Continues from previous page
Y Check TXIF Z900 Pin7 f: 161.19 MHz P: >25 dBm N Is Z900 Insertion loss too high? IL>5 dB Y Change filter Z900 Change upconverter N900
N Check modulator output at R925 P 18dBm max Y N Is TX I/Q OK? V: 0.8 VDC +/ 0.4 V (symmetrical) Y Check I&Q COBBA DACs (BaseBand) N Note! Check R925 check also I/Qresistors R760
Change N700
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TDMA800 TX
The transmitter chain is exactly same as in AMPSmode, but the power amplifier is biased to more linear mode, so it is important, that AMPS have no faults.
N Is AMPS mode OK ? Y N Check Vbias PIN16 N903 V: > 2.8 V Y N Change N700 and/or Cobba Check CCONT VR7_bias (BaseBand) Start AMPS troubleshooting
Start power level tuning. Does it work?
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TDMA1900 TX
TDMA1900 mode and DAMPS mode have common IF section and antenna circuit and thus it is important that DAMPS mode have no faults.
N Is TDMA800 mode OK ? Start TDMA800 troubleshooting
Y N Are LO signals OK ? Start synth troubleshooting Note! Check VHF and UHF locals including LObuffer, measuring point for UHF is N980 pin5.
Y Y Check current consumption I: > 350mA(rms) Check antenna circuit and Duplexfilter Short circuit in PA?
N Y Make press down test for PA. Inreasing current consumption ? Resolder or change PA. Note! The PA ground slug might be poorly soldered or there is delamination on chip.
N
TDMA1900 continued next page
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Check
VAPC
Y
Check PA input power P:> 0 dBm
Y Change PA
V:>2.5 V
N Check TXC Typ 1.5V@PL2 N
N Check Z975 filter Insertion loss IL>4dB Y Change Z975
Y Start powercontrol troubleshooting
N Check TXdriver input P:> 20dBm N Y Change N951
Check COBBA TXCDAC (BaseBand)
Check N980 upconverter output P:> 20 dBm N Y
Check Z950 insertion loss. Max 4 dB.
Check TXIF f: 196.23 MHz P:> 35 dBm
N
Check Z900 insertion loss. If > 4dB, check R926 and C923 or change N700.
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Power control loop Power control section is basically similar for both bands, except for that both bands have their own directional coupler and detector. The power control is actually made in EROTUS IC.
Check V930, V929 Check bias circuit around diodes. Note ! See DETO vs. Output power curve Note: Y Is TXLX functionality OK ? TXLX are LOW on power levels PL 2...7 Y Is DETO vs. output power and TXC OK? See chart below. N Check power control components near N700 Press N700 Change N700 Change N700 N Check PIN diode bias components. Check BB controls. (BaseBand) 1. DETO and TXC will be about same in each mode. 2. TXA is high during modulation. 3. TXLX signals will draw about 4mA current in high state.
Is V929, V930 voltage drop about 0.30.4 V
N
TYPICAL DETECTED VOLTAGES AT POWER LEVELS PL2...PL10
800D Pout PL dBm TXC dac LBDETO mV PL 1900 D Pout dBm TXC dac UB DETO mV
2 3 4 5 6 7 8 9 10
26.8 23.5 20.0 16.0 12.0 8.0 4.0 0.0 4.0
250 77 40 127 187 228 188 229 290
1650 1350 1120 930 840 750 840 740 650
2 3 4 5 6 7 8 9 10
26.8 23.0 20.0 16.0 12.0 8.0 4.0 0.0 4.0
124 27 53 128 177 215 205 253 329
1478 1275 1120 937 831 762 768 693 531
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Synthesizers
There are four oscillators generating the needed frequencies for RFsection. 19.44 MHz reference oscillator, 1GHz UHF VCO, 2Ghz UHF VCO and VHF VCO. Only VHF VCO is discrete solution and it has two fixed frequencies, 322.38 MHz for lowband and 392.46 MHz for upper band. VHF VCOs operating frequency is controlled by BANDsignal and PLL circuit of EROTUS. All locals are locked to the stable reference oscillator. The frequency range for 1GHz UHF VCO is 985.23 1010.2 MHz and for 2Ghz UHF VCO is 2046.2 2107.2 Mhz. A practical way to check out synthesizer statusis to measure the control voltage of the VCO from the integrator capacitor C822 (LB) , C883 (HB) or C789 (VHF). The voltage must be stable and in the correct range, and the local oscillator is running correctly.
19.44 MHz Reference oscillator
The 19.44 MHz oscillator frequency (G850) is controlled by COBBA_D. This 19.44 MHz signal is connected to EROTUS and TDMA1900 PLLcircuit. All synthesizers use the divided VCTCXO signal as reference signal for Phase locked loop to provide the correct LOfrequency. The VCTCXO output signal is also used to generate multiple LO frequency by multipliers. Baseband also needs the reference signal so it can generate necessary clock signals, and the VCTCXO output signal is also buffered and connected to MAD.
58.32 MHz Triple Multiplier
The 3multiplier is a integrated solution in EROTUS and it is used to generate second LO frequency for the receivers. The 3*multiplier output signal is multiplied by 2 and then it is fed to the 2nd downconverter.
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Ty eDateHere
PAMS Technical Documentation
NSW-4 Disassembly & Troubleshooting
19.44 MHz oscillator
VCTCXO OUTPUT : 19.44 MHz G850 P:>0.8Vpp Y
N Change G850
Note! Check all soldering and supply voltages for VCTCXO and RFCbuffer. Check also coil L850.
Check AFCsignal from G850, pin1 V 1.05 V Y Check RFCbuffer output, C719 P: >0.3 Vpp Y
N Check resistor R851
N
Check EROTUS supply voltages.
N
Start BB troubleshooting.
Check 2G PLL N880, pin 15 P: >0.8 Vpp Y Check 3X tank N700, C745 P: >150 mVpp
N
Change capacitor C854
Check L762 and N C745.
Change EROTUS.
continues next page
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19.44 MHz Oscillator (continued)
Check
VAPC
Y
Check PA input power P:> 0 dBm
Y Change PA
V:>2.5 V
N Check TXC Typ 1.5V@PL2 N
N Check Z975 filter Insertion loss IL>4dB Y Change Z975
Y Start powercontrol troubleshooting
N Check TXdriver input P:> 20dBm N Y Change N951
Check COBBA TXCDAC (BaseBand)
Check N980 upconverter output P:> 20 dBm N Y
Check Z950 insertion loss. Max 4 dB.
Check TXIF f: 196.23 MHz P:> 35 dBm
N
Check Z900 insertion loss. If > 4dB, check R926 and C923 or change N700.
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VHF VCO The VHF VCO signal is used to generate transmitter Intermediate frequencies. The VHF VCO has two fixed frequencies. Operating frequency is locked in Phase locked Loop, which is controlled by baseband. Because the oscillator has two frequencies, it has also two different switching modes. These modes are controlled by a BANDsignal. In AMPS and TDMA800 modes the VHF frequency is 322.38 MHz and logical level of BANDsignal is "HIGH". In TDMA1900 mode a higher intermediate frequency is needed, so the operating frequency is increased to 392.46 MHz. The BAND signal is set to logical level "Zero". The VHF VCO output signal is fed to EROTUS LOpin VV_in. Inside the EROTUS, the signal is divided for the Phase detector and TX parts. Before injection to the I/Qmodulator, the frequency is divided by 2 .
Y Is oscillator locked ? OK Note! The Oscillator is locked, when the frequency is stable.
N Y Check EROTUS (N700) (SCLK):2.8V (SDATA):2.8V (SENA1):2.8V SENA is 0 during SCLK and SDATA Note! SENA1 = EROTUS PLL SENA2 = 2G PLL (N870, pin 13)
Check oscillator output level at C744 P: N
Check N770
N Change N770
Note! Check all solderings and missing components
Y Note! N Check PD1 at C790 V=12 (LB) =2.83.8 V (HB) Y CHANGE EROTUS! Note! Check all components and soldering Change V723 Check all solderings and missing components
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AMPS& TDMA800 UHF SYNTHESIZER 1 GHz UHF VCO (G880) generates the first injection for RX (869...897) and the final injection for TX (824...849 MHz). The output frequency of the module depends on the DCcontrol voltage supplied by EROTUS in line PD2.
Is the frequency locked? Note! Frequency = 985.23...1010.2 Vcnt = 1.3...3.5 V , C826
N Note! What is VCO output levet ?, G800 P=100 dBm N Change G880 Check all soldering & missing components
Y Check local input level of frontend (N701, pin 1) P=100 dBm N Y Check feedback input level of EROTUS (at C825) P=100 dBm
N
Check C827 & L820
N Change C825
Check EROTUS (N700) (SCLK):2.8V pin 55 (SDATA):2.8V (SENA1):2.8V SENA is 0 during SCLK and SDATA
N
Start BB troubleshooting
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TDMA1900 UHF SYNTHESIZER 2GHz UHF synthesizer generates desired injection frequencies for TX and RX chain. The output frequency of the VCO depends on the control voltage of the PLLcircuit.
Note! Is the fequency locked ? Frequency = 985.23...1010.2 Vcnt = 1.3...3.5 V , C887
N Note! What is VCO output levet ?, G881 P=100 dBm N Change G881 Check all soldering & missing components
Y Check local input level of frontend (N721, pin 1) P=100 dBm N Y Check feedback input level of N870 P=100 dBm
N
Check C889 & C882
N
Check C888 & L880
Check N870 pin 11 (SCLK):2.8V pin 12 (SDATA):2.8V pin 13 (SENA1):2.8V SENA is 0 during SCLK and SDATA
N
Start BB troubleshooting
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RF ASIC DATA
General Info
EROTUS (N700) provides three main RF functions: 1. 2. 3. RX/TX IF blocks PLLs for VHF and 1 GHz UHF TX Power control circuits
The receiver block consists of IF buffers, active mixers, 6multiplier (3*+2*), AGC amplifier and limiter. The transmitter section includes a digital gain step amplifier, a linear gain control amplifier, a divider, an I/Q Modulator and control part for the Transmitter Power Control loop. The PLL section is controlled via the serial bus and contains both 1GHz UHF and VHF PLLs and prescalers.
EROTUS ASIC
Erotus is a uBGApackage, so RF probing for the most signals is impossible at EROTUS pins. Signals can be checked at those components, to which the signals are fed to.
RX Front ends N701 and N721
Pin no. Pin name Nominal level Description
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
LO IN Vdd buf LO out GND Vdd LNA GND LNA in GND Gain Sel LNA out GND Mxr RF GND/½IF MXR IF GND Vdd MXR
5dBm 2.8V 0dBm 0 2.8V 0 0 >2V 0 0 0 2.8V
Mixer LO input LObuffer Vdd LObuffer output Ground LNA Vdd Ground LNA RF input port LNA ground LNA gain select LNA output port Ground Mixer RF input port Ground (½IF tuing in N721) Mixer IF input port Ground Mixer LObuffer Vdd and LObuffer tuning
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Power Amplifiers N903 & N960
RF9130 (N903)
Pin no. Pin name Description
1 2
VCC L TUNE
3 4 5 6 7 8 9 10 11 12 13 14 15 16 Package Base
GND VCC1 GND1 RF IN N/C Vreg GND GND GND RF OUT RF OUT 2 * f0 GND Vbias Ground RF9131 (N960)
Pin no. Pin name
Power supply pin for bias circuit. Add RF bypass capacitor. Tuning pin for interstage matching network. A short (TBD) transmission line length is required for tuning interstage match. Ground Power supply pin for the first stage collector. A RF choke and a bypass capacitor is required for this pin. Ground pin for the first stage. RF input. DC coupled. No connection or GND Regulated power supply for bias circuit. PA shut down. Ground Ground Ground RF output and bias for the output stage.The power supply for the output transistor needs to be supplied to this pin. Same as pin 12. Second harmonic trap. Add capacitor to ground. Ground Bias control 2.8V. Add RF bypass capacitor. Ground connection. The backside of the package should be connected to the ground plane through a short path.
Description
1 2 3 4 5 6 7 8 9 10 11 12
N/C VCC Q2C N/C VCC Q1C N/C RF IN N/C VREG BIAS3 N/C N/C RF OUT
No connection. (GND) Power supply pin for the 2. stage. A bypass capacitor is required. No connection. (GND) Power supply pin for the 1st stage. A bypass capacitor is required. No connection. (GND) RF input. DC block on chip. No connection. (GND) Regulated voltage supply for the bias circuit. Bias ground. No connection. (GND) No connection. (GND) RF output, Use this pin for an output matching capacitor. Do not feed bias through this pin. (DC coupled) E Nokia Mobile Phones Ltd.
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Pin no.
Pin name
Description
13 14 15 16 Package Base
RF OUT RF OUT N/C N/C Ground
RF output and bias for the output stage. 3rd stage collector. RF output and bias for the output stage. 3rd stage collector. No connection. (GND) No connection. (GND) Ground connection. The backside of the package should be connected to the ground plane through a short path.
PENTA regulator N702
Pin no. Pin name Nominal level Description
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Bypass Common enable VR1cntrl VR2cntrl VR3cntrl VR4cntrl VR5cntrl GND VR5 Vcc2 VR4 VR3 VR2 VR1 Vcc1 N/C
>2V >2V >2V >2V >2V >2V 0 2.8V VBAT 2.8V 2.8V 2.8V 2.8V VBAT
Pin for external bypass capacitor Enable for the whole circuit Regulator 1 ON/OFF Regulator 2 ON/OFF Regulator 3 ON/OFF Regulator 4 ON/OFF Regulator 5 ON/OFF Ground Regulator 5 output VR4 and VR5 common input voltage Regulator 4 output Regulator 3 output Regulator 2 output Regulator 1 output VR1, VR2 and VR3 common input voltage Not connected
TDMA1900 UPCONVERTER N980
Pin no. Pin name Nominal level Description
1 2 3 4 5 6 7 8 9 10 11 12 13
VDD1 N/C N/C GND LO IN GND RF OUT VDD2 N/C N/C GND VDD3 GND
2.8V
0 0dBm 0 2.8V
0 2.8V 0
Supply voltage Not connected Not connected Ground TX local input Ground RF output Supply voltage Not connected Not connected Ground Supply voltage Ground
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NSW-4 Disassembly & Troubleshooting
Pin no.
Pin name
Nominal level
Description
14 15 16
IF IN N/C TX ENA
>2V
Intermediate frequency input Not connected TX enable
TDMA1900 PLLcircuit N870
Pin no. Pin name Nominal level Description
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
FAST CPF CP VDD2 Vss3 RFI Vss2 POL PON Vss1 CLK DATA E Vdd1 XTALB XTALA GND(CP) Vcc Iset LOCK
2.8V 2.8V 0 0 2.8V 2.8V 0 2.8V 2.8V 2.8V 2.8V 0 4.8V
Enable input for fast chargepump Fast charge pump output Normal charge pump output Power supply voltage Ground Main divider input Ground polarity select Power on input Ground Programming bus clock input Programming bus data input Programming bus enable input Power supply voltage Complementary crystal frequency input Complementary crystal frequency input Ground for charge pump Supply voltage for charge pump charge pump currents setting Out of lock detector
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PAMS Technical Documentation
Warranty transfer
Items: 1 Warranty Cable 2 Flash Adapter Service accessories: Product codes: SCH-6A FLA-12 0730167 0080389
The Warranty cable SCH6A and 2 pcs Flash adapters FLA12 are used to connect two phones and transfer the warranty data (user settings and serial numbers) from one phone to another. The warranty transfer procedure is described below: Point of Sale Phone 1 is broken and Phone 2 is the swap phone. Number the phones 1 and 2 to avoid mixup. Plug the warranty cable SCH6A between the flash adapters and connect the adapters to the phones 1 and 2. (in place of the phone battery) Turn the phone 2 on and then on Silent Profile Start the warranty data transfer by selecting code *#92772689# in phone 2. Select option "Transfer user data?" and press OK, "Confirm transfer?" Press OK. Wait untli the transfer is completed. Turn Phone 2 off, then back on and check welcome note and profile. After the transfer check with WinTesla the original and warranty ESN of the phone 2. Send the broken phone no.1 to the central service. Service Center Check and repair the phone . Change Warranty State from "defective" to "exchange". Win Tesla and PKD1CS are needed Menu: Software > Warranty Info > Info State > select "Exchange" Send the repaired phone to the dealer. Point of Sale Use the returned phone as a swap phone. When the Warranty Info is transferred into a swap phone the Warranty State changes to USE mode. Send the broken phone to the central service.
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