PAMS Technical Documentation NSE–3 Series Transceivers Disassembly & Troubleshooting Instructions Original, 11/97
NSE–3 Disassembly & Troubleshooting Instructions PAMS Technical Documentation CONTENTS Page No Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phone is totally dead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flash programming doesn’t work . . . . . . . . . . . . . . . . . . . . . . . Flash Programming (1) . . . . . . . . . . . . . . . . . . . .
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Remove battery Remove dust cap Carefully remove A–cover Note snap fixings ! Remove back cover screws (4 pcs) Turn around.
NSE–3 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Remove UI–module and frame Remove engine module screw (1 pcs) Remove engine module Pull out antenna Remove RTC–battery Page 4 Remove microphone Original, 11/97
NSE–3 PAMS Technical Documentation 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.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions 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 (X001 pin 11) 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 NO Failure in VBAT line Check X101, X102, L103 YES Voltage at pin 29 of CCONT (N100) is 3.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions 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).
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Flash Programming (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 watchdog disable (WDDIS) line (X001 pin 11) to the ground OK EEPROM (D240) pin 8 (VBB) 2.8 V J522 (VXO) 2.
NSE–3 PAMS Technical Documentation 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.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Flash Programming failure (3) 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 NO VBAT is correct 3.6 V YES N100 is faulty YES NO check C213, R213 J227 master reset (Purx) = ”1” (2.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Flash Programming failure (4) 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.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions 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.
NSE–3 PAMS Technical Documentation 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.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions 1 dsp constants download init initialize 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 14 Original, 11/97
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Phone register failure Phone doesn’t register to the network or phone doesn,t make a call YES Analog supply voltage VCOBBA is >2.7 V at pin 7,12 ... of Cobba (N250) NO Check N100 NO Check R270, R271 YES Analog reference voltage Vref is 1.5 V at pin 9 of Cobba (N250) YES 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.
NSE–3 PAMS Disassembly & Troubleshooting Instructions 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.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions SIM Card failure Insert SIM card fault YES Voltage level < 1.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions 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 NO Check R259, R260 NO Check R257, R256, R261 YES Voltage at pin 108 of MAD2 (D200) is 2.8 V (without external audio devices) HEADDET YES NO Frequency at pin 138 of MAD2 (D200) is 1 MHz, square wave 2.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Audio failure (2) Downlink (earphone) is broken YES Digital PCM data at pin 52 of Cobba (N250) during a call NO Check D200 (MAD2) YES DC voltage at pins 5 and 6 of N250 is 1.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions 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 Check X100, F100, L104 R104, R103 NO YES Check N100 Display Information: Not charging YES Voltage level at pin 62 of CCONT (N100) is about 0.
Original, 11/97 N500 pin 26, loading > 1 M Ω YES NO NO NO Check soldered joints of N500 and R504, if OK change R504 Check components in line out of pin 23, if OK change N500 NO Check VREF_2(J518) voltage line Check VRX(J510) and VSYN_1(J516) lines from CCONT NO NO NO N500 pin 23, loading 10 k YES N500 pin 20, loading 10 k YES N500 pin 16, 1.5V YES N500 pin 17 and 19, 2.
Page 22 N620 pin 51 and 52, loading 5 k Ω YES Check N620 pin 51 and 52 for short circuit NO NO NO NO NO NO Change N620 N620 pin 51 and 52, DC–level ~1.7V YES YES N620 pin 47, 2.8V Change N500 N500 pin 9 and 10, loading 10 k Ω YES N500 pin 15, loading 10 k Ω YES YES N500 pin 6, 2.8V NO NO 2nd IF 13 MHz YES N620 pin 51(J530) and 52(J532), SL: –43 YES Z621 output, SL: –43 YES Z621 input 1 and 2, SL: –30 YES N500 pin 9 and 10, SL: –28 NO NO NO Check components in output line.
Original, 11/97 Change N620 NO Check connections between N620 and N250 Check R628 and R629 NO NO NO Check soldered joints, if OK change Z620 COBBA YES N250 pin 22 and 23, SL: –29 dBm YES N620 pin 29 and 30, SL: – 29 dBm YES N620 pin 34, SL: –36 dBm and pin 35, SL: –33 dBm Z620 output(J538), SL: –28 dBm YES YES Z620 input(J540), SL: –26 dBm NO NO NO Check soldered joints at N620 and N250, if OK change N620 YES N620 pin 29 and 30, DC–level ~1V Change N620 YES N620 pin 53(J554), ~1.
NSE–3 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Receiver Fault (4) COBBA N250 pin 7,12,21,25 and 63, ~2.8V YES N250 pin~2.8V 27 and 53, NO NO Check VCOBBA–voltage from CCONT pin 22 Check VBB–voltage from CCONT pin 55 YES N250 pin 9, ~1.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Receiver Fault (5) UHFLO NO G530 VCC–pin voltage, 2.8V Check VSYN_1–line and R530 YES NO G530 VC(J500) voltage ~2.25V (Mid CH) YES Check soldered joints inand VC–line at G530, N620 components Change G530 Does G530 oscillate at any frequency YES YES NO NO N620 pin 21, 13 MHz clock Change G530 Check C633 and soldering joints at N620 YES N620 pin 9,22 and 25, 2.
NO Does the VCO oscillate at any NO frequency ? YES N620 9,22 and 25, ~2.8V NO Check VSYN_2(J508) supply voltage NO YES Check VSYN_1(J516) supply voltage line to V581 Check VCP voltage line V581 base, ~1.7V NO Check R581, R585 and soldered joints NO V581 emitter loading ~330 if OK change V581Ω, YES V581 emitter, ~1V YES PAMS Original, 11/97 Check V580, L581, C582, C583 Technical Documentation Change N620 NO YES YES N620 17 and 28, ~5V V581 collector, ~2.6V NSE–3 N620 pin 18, ~2.
NO Receiver Fault YES NO N250 pin 19, voltage between 0.5 – 2.3V YES NO Check AFC–line(J520) for short circuits, if OK change YES Change N620 NO Use sevice software to set AFC to MAX AFC–voltage(J520), NO ~2.3V YES Main clock(J506), > 13 MHz NO Check R600 and C602, if OK change N250 Change G600 NSE–3 Page 27 NOTE ! If DSP in MAD does not work properly, supply voltages stays down.
Page 28 Check R504 and soldered joints NO NO NO NO Change N500 YES N500 pin 20, loading 10 k Ω N500 pin 16, ~1.5V YES N500 pin 1 and 29, ~2.
Z505 output, loading > 1 M Ω NO YES Change Z505 NO N550 pin 2,4,6,12,13 and 14 ~3.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Transmitter Fault (3) Power Control TXLEV5 NO Transmitter working OK Transmitter Fault YES N250 pin 11, TXC – pulse OK NO Check TXC – line from N250 pin 17, if OK change N250 NO V550 anode, DC–voltage ~0.
PAMS Technical Documentation NSE–3 Disassembly & Troubleshooting Instructions Appendix A Picture 1. COBBACLK – signal Picture 2.
NSE–3 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Appendix B Picture 3. SCLK – signal Picture 4. SDATA – signal Picture 5.
NSE–3 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Appendix C Picture 6. TXQP, TXQN, TXIP and TXIN – signal Picture 7. TXP – signal Picture 8.
NSE–3 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Appendix D Picture 9. TXC – signal (TXLEV5) Picture 10.
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