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PAMS Technical Documentation NSE1 Series Transceivers
Disassembly & Troubleshooting Instructions
Original 03/98
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
CONTENTS Page No
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phone is totally dead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flash programming doesn't work . . . . . . . . . . . . . . . . . . . . . . . Flash Programming failure (1) . . . . . . . . . . . . . . . . . . . . . . . Flash Programming failure (2) . . . . . . . . . . . . . . . . . . . . . . . Power doesn't stay on, or phone is jammed . . . . . . . . . . . . . . Display Information: Contact Service . . . . . . . . . . . . . . . . . . . . The phone doesn't register to the network or phone doesn't make a call Phone register failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SIM card is out of order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SIM Card failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Audio failure (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Audio failure (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charger failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver Fault (7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmitter Fault (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmitter Fault (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmitter Fault (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 5 6 6 8 9 10 11 11 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
Page 2
Original 03/98
PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
Disassembly
Remove battery Remove dust cap by fingernail
Press strongly towards arrow direction
Carefully remove Acover Note snap fixings !
Remove back cover screws (4 pcs) Remove Ccover
Original 03/98
Page 3
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Remove UImodule screws (2 pcs)
Remove UImodule and frame
Remove engine module screw (1 pc)
Remove engine module
Remove RTCbattery Remove antenna by pulling it straight out
Remove microphone
Page 4
Original 03/98
PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
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 doesn`t work 3. Power doesn`t stay on or the phone is jammed 4. Display information: Contact Service 5. Phone doesn`t register to the network or phone doesn`t make a call. 6. Plug in SIM card is out of order ( insert SIM card or card rejected). 7. Audio fault. 8. 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
Original 03/98
Page 5
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
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 (N100 pin 29) is grounded. Used battery voltage must be higher than 3.0 V. Otherwise the hardware of CCONT (N100) prevents totally to switch power on.
Phone is totally dead
YES
J232 VBAT is 3.6 V
YES
NO
Failure in VBAT line Check X101, X102, L103
Voltage at pin 29 of CCONT (N100) is 3.6 V
YES
NO
Faulty circuit N100
N100 pin 55 (VBB) 2.8 V N100 pin 25 (VXO) 2.8 V when PWR switch is pressed or watchdog disable pin is grounded
YES
NO
CCONT (N100) pin 29 0V when PWR switch is pressed
NO
Check R118, X300 Check UI module
YES
See section: Power Doesn't Stay On
Faulty circuit N100
Flash programming doesn't work
In service places flash programming can be done via system connector X100. In flash programming error cases the flash prommer can give some information about a fault. The fault information messages could be: MCU doesn't boot Serial clock line failure Serial data line failure External RAM fault Algorithm file or alias ID don't find MCU flash Vpp error In cases that the flash programming doesn't succeed there is a possibility to check short circuits between the memories and the MCU (MAD2). This test is useful to do, when the fault information is: MCU doesn't boot, Serial clock line failure or Serial data line failure.
Page 6
Original 03/98
PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
The test procedure is following: 1. Connect the short circuit wire between the test points J229 and J230. 2. Switch power on 3. If the voltage level in testpoint J225 is 2.8 V ("1"), the interface is OK. If there is a short circuit, the voltage level in testpoint J225 stays low and 32kHz square wave signal can be seen in the lines which are already tested. One must be noticed that this test can be found only short circuits, not open pins. Also upper data lines (15:8) of flash circuit D210 are not included to this test.
CCONT pin 54 ( PURX )
MAD pin 38
( MCUAD0)
selftest passed
MAD pin 134 J225
( ExtSysResX))
Original 03/98
Page 7
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Flash Programming failure (1)
Flash programming doesn't work
YES
If the fault information from the prommer is: a) MCU doesn't boot b) serial data line failure c) serial clock line failure connect:
connect the shortcircuit fire from N100 pin 29 to ground (watchdog)
OK
EEPROM (D240) pin 8 (VBB) 2.8 V J522 (VXO) 2.8 V
YES
NO
VBAT is correct 3.6 V
YES
N100 is faulty
NO
check C213, R213
YES
J227 master reset (Purx) = "1" (2.8 V)
YES NO
J228 sleep clock(SCLK) square wave 32 kHz
YES
NO
check sleep clock circuitry (B100, R154...)
J506 (RFC) 13 MHz 800 mV min
NO
MAD2 (D200) pin 93: 13 MHz sine wave clock signal: 500 mVpp min.
YES
Faulty circuit N100 or over loaded PurX line
check buffer V705 and VCXO G600
Check that following lines are correct: FCLK (MBUS) line: X100 pin 11 > D200 pin 112 FTX (fbus_tx) line: X100 pin 13 > D200 pin 104 FRX (fbus_rx) line: X100 pin 12 > D200 pin 109 check also pullup and pulldown resistors: R203, R201, R215 GND : X100 pin 14 > GND
OK
Enable the selftest function of D200 by connecting shortcircuit between testpoints J229 and J230
Connect an oscilloscope to testpoint J225 and switch power on
NO
Voltage level rises to "1" after power on at testpoint J225
YES
There is a shortcircuit somewhere in memory control lines or MCU address lines or MCU lower (7:0) data lines
There could be open pins in circuits D200 (D211, D240) If not, the PCB or D200 (D211, D240) is faulty
Page 8
Original 03/98
PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
Flash Programming failure (2)
Flash progrmming doesn't work
YES
If the fault information from the prommer is: External RAM fault
YES
Check pins of SRAM (D220) Check control lines of SRAM: RAMSelX ...
Flash progrmming doesn't work
YES
If the fault information from the prommer is: Algorithm file or alias ID don't find, ID is unknown etc.
YES
Check pins of FLASH (D210) Check control lines and upper data lines (15:8) of FLASH: ROM1SelX...
Flash progrmming doesn't work
YES
If the fault information from the prommer is: MCU flash Vpp error
YES NO NO
Vpp = 3 V in D210 pin 13 (or C212)
YES
Vpp > 4.5 V in testpoint J234
YES
Check regulator N100 C132, V116, C131
Check components C212, R211
OK
Check UI regulator N201
Faulty component D210
Original 03/98
Page 9
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Power doesn't stay on, or phone is jammed
If this kind of fault has come after flash programming, there are most probably open pins in ICs. The soldered joints of ICs: D200 (MAD2), D210 (FLASH), N100 (CCONT), D221 (SRAM) are useful to check at first. Normally the power will be switched of by CCONT (N100) after 30 seconds, if the watchdog of the CCONT can not be served by software. The watchdog updating can be seen by oscilloscope at pin 50 (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 CCONT pin 29 to ground.
Power doesn't stay on or phone is jammed
YES
CCONT watchdog is served? (pin 50 pulses 1 > 0)
YES
software is able to run check UI module If power is switched off after few seconds, check BSI and BTEM lines
NO
connect the shortcircuit fire from N100 pin 29 to ground (watchdog)
OK
EEPROM (D240) pin 8 (VBB) 2.8 V J522 (VXO) 2.8 V
YES
NO
VBAT is correct 3.6 V
YES
N100 is faulty
NO
check C213, R213
YES
J227 master reset (Purx) = "1" (2.8 V)
YES NO
J228 sleep clock(SCLK) square wave 32 kHz
YES
NO
check sleep clock circuitry (B100, R154...)
J506 (RFC) 13 MHz 800 mV min
NO
MAD2 (D200) pin 93: 13 MHz sine wave clock signal: 500 mVpp min.
YES
Faulty circuit N100 or over loaded PurX line
check buffer V705 and VCXO G600
Open pins or faulty circuit: D200, D210, D221, N100 R215
Page 10
Original 03/98
PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
Display Information: Contact Service
This fault means that software is able to run and thus the watchog of CCONT (N100) can be served. Selftest functions are run when power is switched on and software is started to excute from flash. If any of selftests is failed, contact service information will be shown on display.
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 (MAD2;D200) and the RFI (Cobba; N250). MAD2 handles digital control lines ( like synthe, TxP etc.) and Cobba handles analog control lines (like AFC, TxC etc.). The DSP software is constructed so that operation states of DSP (MAD2) can be seen in external flag (DSPXF) output pin (D200 pin 91). After power up, DSP signals all completed functions by changing the state of the XF pin (see figures 39 and 40).
1. DSP initialization done 2.Synchronization to network done 3. Registrarition to network done. 1 2 3
MAD2 pin 91 (DSPXF) J222
Original 03/98
Page 11
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
1
init initialize dsp constants download patch code download
initialization done
MAD2 pin 91 (DSPXF) J222
2
PSW search
last PSW OK
channel scan starts
synchronization OK
MAD2 pin 91 (DSPXF) J222
3
send RACH RACH OK
go SDCCH imediate assigment OK
MAD2 pin 91 (DSPXF) J222
Page 12
Original 03/98
PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
Phone register failure
Phone doesn't register to the network or phone doesn,t make a call
YES NO
Analog supply voltage VCOBBA is >2.7 V at pin 7,12 ... of Cobba (N250)
YES
Check N100
Analog reference voltage Vref is 1.5 V at pin 9 of Cobba (N250)
YES
NO
Check R270, R271
Supply voltage VCP (N100 pin 32) > 4.8 V Supply voltage VRX (N100 pin 9) > 2.7 V Supply voltage VSYN_1 (N100 pin 15) > 2.7 V Supply voltage VSYN_2 (N100 pin 4) > 2.7 V during the receiving slot Supply voltage VTX (N100 pins 11, 20) > 2.7 V during the transmitting slot
YES
NO
Check N100, D200
Synthesizer lines: SEna (N620 pin 56), SClk (N620 pin 54) SData (N620 pin 55) pulses 0 > 1 during receiving slot
YES
NO
Check D200
RF control lines: RxC (N250 pin 18) 0 > 2.3 Vmax during receiving slot AFC (N250 pin 19) 0 1.2 V typ. during receiving slot
YES
NO
Check N250
Analog data signal RxIP (N250 pin 22) 0> 1.5 V DC during receiving slot Analog data signal RxIN (N250 pin 22) 0> 1.5 V DC during receiving slot Used benefit signal is biased to DC and its amplitude is 50 mVpp nominal and frequency is 13 MHz
YES NO
NO
Check N250 if DC is failed Check RF part if benefit signal is failed
DAX signal (N250 pin 48) pulses 1 > 0 during receiving slot
YES
Check N250 Check N250 if TxC is failed Check D200 if TxP is failed
RF control lines: TxC (N250 pin 17) 0 > 2.3 Vmax during transmit slot TxP (D200 pin 176) 0>1 (2.8 V) during transmit slot
YES
NO
Analog data signals: TxIN (N250 pin 13) 0> 0.8 V DC during transmit slot TxIP (N250 pin 14) 0 >0.8 V DC during transmit slot TxQN (N250 pin 15) 0 >0.8 V DC during transmit slot TxQP (N250 pin 16) 0 >0.8 V DC during transmit slot Used benefit signal is biased to DC and its amplitude is 300 mVpp nominal and frequency is 67 kHz
NO
Check N250
YES
Check RF part
Original 03/98
Page 13
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
SIM card is out of order
The hardware of the SIM interface from MAD2 (D200) to the SIM connector (X302) can be tested without SIM card. When the power is switched on and if the BSI line (X101;1) is grounded by resistor, all the used lines (VSIM, RST, CLK, DATA) rises up to 5 V four times. Thus "Insert SIM card" faults can be found without SIM card. The fault information "Card rejected" means that ATR message (the first message is always sent from card to phone) is sent from card to phone but the message is somehow corrupted, data signal levels are wrong etc. or factory set values (stored to the EEPROM) are not correct.
Page 14
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PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
SIM Card failure
Insert SIM card fault
YES
Voltage level < 1.5 V at pin 95 of D200 when BSI resistor is connected
YES
NO
Check R120, R122, X101 C120, C160
VSIM, DATA, RESET and CLOCK lines rises up to 5 V after power on at pins of SIM card
NO
YES
Check SIM card and SIM reader connectors
VSIM(36), DATAO(43),SIMRSTO(42) and SIMCLKO(38) lines rises up to 5 V after power on at pins of N100 (CCONT)
NO
YES
Check X302, R124, R125, R128
SIMPWR(30), DATAA(44), SIMRSTA(40), SIMCLK(41) and SIMIOC(39) lines rises up to 2.8 V after power on at pins of N100 (CCONT)
NO
YES
faulty circuit N100 (CCONT)
SIMCardPwr(129), SIMCardData(120), SIMCardRstX(127), SIMCardClk(126) and SIMCardIOC(128) lines YES rises up to 2.8 V after power on at pins of D200 (MAD2)
NO
faulty PCB
Check again that voltage level at pin 95 (SIMCardDetX) of D200 is lower than 1.5V If it is, change D200
Card Rejected fault
YES
VSIM is according the specification VSIM = 2.8 V min (with 3 V SIM card) VSIM = 4.5 V min (with 5 V SIM card)
YES
NO
faulty circuit N100 (CCONT)
NO
The ATR data can be seen at pin 43 (CCONT, N100)
YES
Check X302, R124
The ATR data can be seen at pin 120 (MAD2, D200)
YES
NO
Check N100
NO
SIMIOControl line (N100 pin 36) is "1" during the ATR message
YES
Check D200
Check D200
Original 03/98
Page 15
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Audio failure (1)
Uplink (microphone) and downlink (earphone) are broken
YES
Voltage at pin 107 of MAD2 (D200) is 2.8 V (without external audio devices) HOOKDET
YES
NO
Check R259, R260
Voltage at pin 108 of MAD2 (D200) is 2.8 V (without external audio devices) HEADDET
YES
NO
Check R257, R256, R261
Frequency at pin 138 of MAD2 (D200) is 1 MHz, square wave 2.8 Vpp
YES
NO
Check N250 (Cobba)
Frequency at pin 139 of MAD2 (D200) is 8 kHz, square wave pulses 2.8 Vpp
NO
Check N250 (Cobba)
Uplink (microphone) is broken
YES
Voltage at pin 6 of X100 is 1.8 V Voltage at pin 7 of X100 is 0.3 V during a call
YES
NO
Check microphone, X100 and micbias components V250... If OK, check that micbias control line is (D200 pin1 ) 2.8 V during a call
DC voltage at pins 59 and 60 of N250 is 1.4 V during a call
YES
NO
Check N250 (Cobba)
Analog audio signal (few millivolts) at pins 59 and 60 of N250 during a call
YES
NO
Check C262, C263 and PCB routings
Digital PCM data at pin 137 of MAD2 (D200) during a call
NO
Check N250 (Cobba)
Page 16
Original 03/98
PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
Audio failure (2)
Downlink (earphone) is broken
YES
Digital PCM data at pin 52 of Cobba (N250) during a call
YES
NO
Check D200 (MAD2)
DC voltage at pins 5 and 6 of N250 is 1.4 V during a call
YES
NO
Check N250 (Cobba)
Analog audio signal (some ten millivolts) at pins 5 and 6 of N250 during a call
NO
Check N250 (Cobba)
Original 03/98
Page 17
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Charger failure
Nothing happens when charger is connected
YES
Voltage level at pin 60 of CCONT (N100) is higher than 0.4 V when charger is connected
YES
NO
Check X100, F100, L104 R104, R103
Check N100
Display Information: Not charging
YES
Voltage level at pin 62 of CCONT (N100) is about 0.8 V when power is connected BSI resistor value should be 39 k
YES
NO
Check X101, R120, R122
Voltage level at pin 63 of CCONT (N100) is about 0.5 V when power is connected BTEMP resistor value should be 47 k
YES
NO
Check X101, R120, R122
NO
32 Hz square wave frequency at pin 7 of CHAPS (N101)
YES
Check N100
Voltage levels at pins 5 and 12 of CHAPS (N101) are same as VB
YES
NO
Check R131, N101
Voltage levels at pins 5 and 12 of CHAPS (N101) rises when charger is connected
NO
Check N101
Page 18
Original 03/98
PAMS
Receiver Fault (1)
Technical Documentation
Original 03/98
Receiver Fault NO Duplexer antpin, SL: 58 dBm NO N500 pin 25, loading > 1 M N500 pin 25, SL: 61 dBm YES YES Check soldered joints of X540 and Z550, check also that X540 is assembled correct, if OK Change Z550 YES YES Change X540 Loading between X540 pin 1 and 2 ~ 0 NO NO N500 pin 23, SL: 38 dBm YES NO Z500 input, loading > 1 M YES Check C500 soldered joints, if OK change it NO Z500 output, SL: 47 dBm YES N500 pin 16, 1.5V YES N500 pin 7 and 8, SL: 57 dBm YES NO N500 pin 7 and 8, loading 50 YES NO Z500 output, loading > 1 M YES Change Z500 YES NO Check C518, C504, if OK cange Z500 Z500 input, SL: 44 dBm YES NO Check soldered joints, if OK change Z500 YES Check soldered joints of C516, C520 check internal coils YES 1st IF 71 MHz Rise up N500 pin 7,8. If level back to normal change N500 Change N500
Check C506, if OK change N500
NO
Change duplexer
NO
Duplexer Rxpin, SL: 61 dBm
NO
N500 pin 26, loading > 1 M YES
NO
N500 pin 26 is "HIGH"
Check PDATA0line for short circuits
Check PDATA0line D200 pin 171
NO
Check VRX(J510) and VSYN_1(J516) lines from CCONT
N500 pin 17 and 19, 2.8V
Check VREF_2(J518) voltage line
NO
NO
Check soldered joints of N500 and R504, if OK change R504
N500 pin 20, loading 10 k
NO
Check components in line out of pin 23, if OK change N500
N500 pin 23, loading 10 k
NSE1
Disassembly & Troubleshooting Instructions
Page 19
NSE1
Receiver Fault (2)
Page 20
1st IF 71 MHz N500 pin 12, 1018 MHz SL: 28 dBm YES Check connections from G530 to N500 pin 12 NO N500 pin 9 and 10, SL: 28 YES Z621 input 1 and 2, SL: 30 YES NO Z621 input 1 and 2, loading > 1 M YES Check components in input line to Z621 NO Check input for short circiuts, if OK change Z621 YES NO G530 Out, 1018 MHz SL: 28 dBm NO UHFLO YES Z621 output, SL: 43 YES NO N620 pin 51(J530) and 52(J532), SL: 43 YES YES NO Z621 ouput 1 and 2, loading > 1 M YES NO Check output for short circiuts, if OK change Z621 Check components in output line. Check soldered joints at N620, if OK change Z621 2nd IF 13 MHz
NO
Check VRX(J510) and soldered joints
N500 pin 6, 2.8V
NO
Check R504
N500 pin 15, loading 10 k YES
Disassembly & Troubleshooting Instructions
Rise up 9 and 10, if loading OK at pads change N500
NO
N500 pin 9 and 10, loading 10 k YES
Change N500
Checkof N620 joints soldered
NO
N620 pin 47, 2.8V
NO
N620 pin 51 and 52, loading 5 k YES
NO
N620 pin 51 and 52, DClevel ~1.7V YES
Technical Documentation
Original 03/98
Check N620 pin 51 and 52 for short circuit
Change N620
PAMS
PAMS
Receiver Fault (3)
Technical Documentation
Original 03/98
2nd IF 13 MHz N620 pin 8(J542), SL: 28 dBm VHFLO YES N620 pin 44, SL: 19 dBm YES NO Z620 input(J540), SL: 26 dBm YES YES Change N620 NO Z620 output(J538), SL: 28 dBm YES N620 pin 34, SL: 36 dBm and pin 35, SL: 33 dBm YES N620 pin 29 and 30, SL: 29 dBm YES NO N250 pin 22 and 23, SL: 29 dBm YES NO N620 pin 29 and 30, DClevel ~1V YES NO Change N620 N620 pin 53(J554), ~1.2V NO YES Check RXC control voltage from COBBA pin 18 NO N620 pin 47(J510), ~2.8V NO Check VRX supply voltage NO NO Check soldered joints at N620 and N250, if OK change N620 COBBA
Check R626 and soldered joints
Check soldered joints, if OK change Z620
Change N620
NO
N620 pin 34 and 35, DClevel, ~1.4V YES
Check R628 and R629
Check connections between N620 and N250
NSE1
Disassembly & Troubleshooting Instructions
Page 21
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Receiver Fault (4)
COBBA
N250 pin 7,12,21,25 and 63, ~2.8V YES N250 pin 27 and 53, ~2.8V YES N250 pin 9, ~1.5V YES N250 pin 10, loading 100 k YES N250 pin 45, 13 MHz clock OK YES N250 pin 28, is "HIGH" YES Check data and adress lines between D200 and N250, if OK change N250 COBBACLK signal: Oscilloscope picture in Appendix A
NO
Check VCOBBAvoltage from CCONT pin 22
NO
Check VBBvoltage from CCONT pin 55 Check VREFvoltage from CCONT pin 13 through R253 Check soldered joints and R253 Check COBBACLKline from MAD pin 144
NO
NO
NO
NO
Check COBBARSTXline from MAD pin 163
Page 22
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PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
Receiver Fault (5)
UHFLO
NO G530 VCCpin voltage, 2.8V YES NO G530 VC(J500) voltage ~2.25V (Mid CH) YES Change G530 Check soldered joints in VCline at G530, N620 and components YES Does G530 oscillate at any frequency YES N620 pin 21, 13 MHz clock YES N620 pin 9,22 and 25, 2.8V YES N620 17 and 28, 5V YES NO Check VCPvoltage from CCONT pin 32 NO Check VSYN_2(J508) from CCONT and CNTVR3control from MAD NO Change G530 Check VSYN_1line and R530
NO
Check C633 and soldering joints at N620
N620 pin 58, 1.5V YES
NO Check VREF_1line
NO N620 pin 59, loading 15 k YES SCLK,working OK SDATA, SENA1 YES Change N620 NO
Check soldering joints at N620 and R635, if OK change R635 Check SCLK, SDATA, SENA1lines from MAD
13 MHz clock oscilloscope picture in Appendix A SCLK, SDATA, SENA1 oscilloscope pictures in Appendix B
Original 03/98
Page 23
Receiver Fault (6)
NSE1
Page 24
VHFLO N620 pin 18, ~2.3V NO Does the VCO oscillate at any NO frequency ? YES N620 9,22 and 25, ~2.8V YES NO N620 17 and 28, ~5V YES Change N620 Check VCP voltage line NO Check VSYN_2(J508) supply voltage V581 collector, ~2.6V YES V581 base, ~1.7V YES NO Check R581, R585 and soldered joints NO Check VSYN_1(J516) supply voltage line to V581 V581 emitter, ~1V YES NO V581 emitter loading ~330 if OK change V581,
Disassembly & Troubleshooting Instructions Technical Documentation
Original 03/98
Check V580, L581, C582, C583
PAMS
Technical Documentation
Receiver Fault (7)
Original 03/98 Page 25
PAMS
AFC
RSSI tuning working OK ? YES
NO
Receiver Fault
NO N250 pin 19, voltage between 0.5 2.3V YES Set SpectrumAnalyzer Frequency: 13 MHz Span: 10 kHz RESBW: 3 kHz
N250 pin 19, loading > 1 M YES Change N620
NO
Check AFCline(J520) for short circuits, if OK change
Disassembly & Troubleshooting Instructions
13 MHz in midst, (Test point J 506)
NO Use sevice software to set AFC to MAX
NOTE ! If DSP in MAD does not work properly, supply voltages stays down.
AFCvoltage(J520), NO ~2.3V YES Main clock(J506), > 13 MHz NO
Check R600 and C602, if OK change N250
NSE1
Change G600
NSE1
Transmitter Fault (1)
Page 26
Transmitter Fault TXLEV 5 N620 pin 8(J542) 232 MHz SL: 28 dBm NO VHFLO YES N620 pin 61 and 62, 116 MHz SL: 40 dBm YES NO N500 pin2(J552) and pin3 (J550) 116 MHz SL: 32 dBm YES N620 pin 63(J514), VTXpulse OK ? YES N620 pin 11, TXCpulse OK? NO N500 pin 12(RXContinous), SL: 28 dBm YES NO N500 pin 30, SL: 18 dBm YES YES N620 pin 59, loading 15 k YES N620 pin 61 and 62, ~0.8V NO Check R635 and soldered joints NO YES N620 pin 58, ~1.5V NO Check VREF_1 line NO N620 pin 1, TXPpulse OK? YES NO N620: TXQP, TXQN, TXIP and TXIN, OK ? YES NO NO Check TXQP, TXIP, TXQN, TXIN lines from COBBA pin 13...16 and soldered joints at N620 and N250, if OK change N250(Test pins J558 & J560) Check TXPline from MAD Check VTX supply voltage from CCONT NO Check TXCline from COBBA UHFLO Change N620 TXQP, TXIP, TXIN, TXQN, TXP and VTX: Oscilloscope pictures in Appendix C Transmitter 1 YES
Check N500 pin 2 and 3 for short circuits, if OK change N500
NO
N500 pin 2 and 3, loading > 1M YES
Disassembly & Troubleshooting Instructions
Check C652, C653, C655, L623, L624, R623, R625, if OK change N500
Check VTX supply voltage from CCONT
NO
N500 pin 1 and 29, ~2.8V YES
NO
Check VREF_2 line(J518)
N500 pin 16, ~1.5V YES
Check R504 and soldered joints
NO
N500 pin 20, loading 10 k
Technical Documentation
Original 03/98
Change N500
PAMS
Technical Documentation
Transmitter Fault (2)
Original 03/98
Check Z505 output for short NO circuits, if OK change Z505 Z505 output, loading > 1 M YES Change Z505 NO Check VBATTconnections to NO N550 Check soldered joints at N550 NO N550 pin 2,4,6,12,13 and 14 ~3.6V YES N550 pin 1 and 16, VTXpulse YES N550 pin 9, power control pulse YES Check C564,C505,C566,C572,C555,C 567,L552, if OK change N550 VTX and power contol pulse(TXC): Oscilloscope pictures in Appendix D NO Check soldered joints at N550 NO and N620, if OK change N620
PAMS
Transmitter 1 TXLEV5
Z505 input, SL: 23 dBm YES Z505 output, SL: 29 dBm YES N550 pin 8, SL: 29 dBm YES N550 pin 13, SL: 2 dBm YES Duplexer TXpin, SL: 6 dBm YES
NO
Z505 input, loading > 1 M YES Check C700 Check V640 limiter circuit DClevels(VTXvoltage), Base: ~0.6V Collector: ~0.6V Emitter: ~0.3V
NO
Check Z505 input for short circuits, if OK change Z505
NO
Check R668, R662, R664, R666, R670, C660, C662 and C562, If OK change V640
Disassembly & Troubleshooting Instructions
NO
Check components in line from N550 to Z550. Also check for short circuits, if OK change Z550
RFconnector X540 pin 1, SL: 5 dBm
NO
Check X540, if OK change Z550
Page 27
NSE1
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Transmitter Fault (3)
Power Control TXLEV5
NO Transmitter working OK YES N250 pin 11, TXC pulse OK YES N620 pin 11 and 12 pulses are about the same NO NO
Transmitter Fault
Check TXC line from N250 pin 17, if OK change N250
V550 anode, DCvoltage ~0.8V YES
NO
Check VSYN_1 voltage through R550, R551 and R552
N620 pin 12, loading ~4 k YES
NO
Check C632, if OK change N620
Check C554, R553 and R554, if OK change V550
TXC pulse: Oscilloscope picture in Appendix D
Page 28
Original 03/98
PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
Appendix A
Picture 1. COBBACLK signal
Picture 2. 13 MHz Main clock signal
Original 03/98
Page 29
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Appendix B
Picture 3. SCLK signal
Picture 4. SDATA signal
Picture 5. SENA1 signal
Page 30
Original 03/98
PAMS Technical Documentation
NSE1 Disassembly & Troubleshooting Instructions
Appendix C
Picture 6. TXQP, TXQN, TXIP and TXIN signal
Picture 7. TXP signal
Picture 8. VTX signal Original 03/98
Page 31
NSE1 Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Appendix D
Picture 9. TXC signal (TXLEV5)
Picture 10. DET signal(N620 pin 12) TXLEV5
Page 32
Original 03/98