PAMS Technical Documentation NSE–6 Series Transceivers Disassembly & Troubleshooting Instructions Original 08/98
NSE–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation CONTENTS Page No Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Baseband Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Alignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Phone is totally dead . . .
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Disassembly Remove battery Step 1. Open slide cover. Step 2. Push slide edge outwards. Step 3. Lift slide up from the edge and slide will be released. Remove a–cover screws (2 pcs) NOTE: When assembling the screws, use 17 Ncm torque. Turn the phone around and remove C–cover screws (2 pcs) Step 1. Push c–cover edge outwards to release it behind locking snap Step 2. Lift up the edge to release c–cover. Step 3.
NSE–6 PAMS Disassembly & Troubleshooting Instructions Remove shield screws (2 pcs). Technical Documentation Remove shield. Step 1. Push slide detector switch to the bottom and hold. Step 2. Release main pcb by lifting rear up and pulling. Remove main pcb. Step 1. Lift slide frame from botttom and loosen it from a–cover. Step 2. Remove slide frame, UI– board will follow. Parts can be separated.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions 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 In the local mode the baseband can be controlled through MBUS or FBUS connections by a PC–locals software.
NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation 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–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Phone is totally dead This means that the phone doesn’t take current at all when the power switch is pressed or when the watchdog disable pin (X001 pin 11, J111) is grounded. Used battery voltage must be higher than 3.1 V. Otherwise the hardware of CCONT (N100) prevents totally power switch–on. Phone is totally dead Yes No Failure in VBAT line Check L103 J232 VBAT is 3.6 V Yes No Voltage at J111 is 3.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions In cases of unsuccesful flash programming there is a possibility to check short circuits between the memories and the MCU (MAD2). It is useful to do this test, when the fault information is: MCU doesn’t boot, Serial clock line failure or Serial data line failure. The test procedure is following: 1. Connect testpoint J229 to ground. 2. Switch the power on. 3. If the voltage level in testpoint J225 is 2.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Flash Programming failure (1) Flash programming doesn’t work via panel connector YES If the fault information from prommer is: a) MCU doesn’t boot b) Serial data line failure c) Serial clock line failure connect watchdog disable (WDDIS, J111) line to the ground OK NO VBB (R115, C107 upper side) 2.8 V VXO (C149 upper side ) 2.8 V YES Check C213, R213 See section ”Phone is totally dead” NO J227 master reset (Purx) = ”1” (2.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Flash Programming failure (2) Flash programming doesn’t work via panel connector Flash programming doesn’t work via panel connector If the fault information is: External RAM fault If the fault information is: Algorithm file or alias ID don’t find, ID is unknown etc. Check control lines of SRAM (D230): RamSelX (J235).. There could be open joints in SRAM Check control lines of Flash (D220): ROM1SelX (J234)..
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Flash Programming failure (3) Flash programming doesn’t work YES If the fault information from prommer is: a) MCU doesn’t boot b) Serial data line failure c) Serial clock line failure connect watchdog disable (WDDIS, J111) line to the ground OK VBB (R115, C107 upper side) 2.8 V VXO (C149 upper side ) 2.8 V YES Check C213, R213 VBAT is correct 3.6 V NO J227 master reset (Purx) = ”1” (2.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Flash Programming failure (4) Flash programming doesn’t work Flash programming doesn’t work If the fault information is: External RAM fault If the fault information is: Algorithm file or alias ID not found, ID is unknown etc. Check control lines of SRAM (D230): RamSelX.. There could be open joints in SRAM Check control lines of Flash (D220): ROM1SelX (J234)..
NSE–6 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 joints in ICs. The solder joints of ICs: MAD2 (D200), Flash (D220) and SRAM (D230) are to be checked at the extent possible (by microscope from the side of PCB and lightly pressing components while switching power on).
NSE–6 PAMS Disassembly & Troubleshooting Instructions Technical Documentation Display Information: Contact Service This fault means that software is able to run and thus the watchdog of CCONT (N100) can be served. Selftest functions are run when power is switched on and software is executed from flash. If any of the selftests fails, a “contact service” text is shown on display. MCU self tests are devided to those executed while power up (start up tests) and ones that can be executed with connected PC.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions 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 on baseband or RF. The phone can be set to wanted mode with WinTesla service software in order to find out whether the fault is in RF or in baseband (RF interface measurements).
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions 1 DSP constants download init inialize Patch code download Iinitialization done 2 channel scan starts PSW search Last PSW OK Sycronization OK 3 Send RACH RACH OK (transmitter on) Page 16 Go SDCCH immediate assignment OK (phone in serve state) Original 08/98
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Phone register failure Phone doesn’t register to network or phone doesn’t make a call YES NO Analog supply voltage VCOBBA is > 2.7 V at C280 (C281, C282..) Check CCONT (N100) YES Analog reference voltage Vref is 1.5 V at C251 (R253 lower side) NO Check R253, R251 YES – During the receiving slot: Supply voltage VCP (J220) > 4.8 V Supply voltage VRX (C148, C543..) > 2.7 V Supply voltage VSYN_1 (C144, C505..) > 2.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions SIM card related failures The hardware of the SIM interface from MAD2 (D200) to the SIM connector (X451) can be tested without a SIM card. When the power is switched on and the BSI line (J122) is grounded by a resistor, all the used lines (VSIM, RST, CLK, DATA) rise up to 5 V four times. Thus “Insert SIM card” faults can be found without SIM card.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions SIM Card failure Card rejected fault YES VSIM (J252): 2.8 V min (with 3 V SIM card) 4.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Audio failure Uplink (microphone) and downlink (earphone) are disfunctional YES NO Voltage at HOOKDET (C260) 2.8 V (without headset) Check R259, R260 YES NO Voltage at HEADDET (C261) 2.8 V (without headset) Check R256, R257, R261 YES NO Check Cobba (N250) Frequency at J257 is square wave 8 kHz 2.8 Vpp Uplink (microphone) is disfunctional YES Voltages at J261 and J262 are 1.8 V and 0.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Charger failure Nothing happens when charger is connected YES NO Voltage at R103 is higher than 0.4 V when the charger is connected Check F101, L104 R104, R103 YES Check CCONT (N100) Display information: Not charging YES Voltage at C120 is about 0.8 V when the power is connected BSI resistor should be 39 K NO Check R120, R122, battery connector YES Voltage at C121 is about 0.
Page 22 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 NO NO NO Check VREF_2(J518) voltage line Check VRX(J510) and VSYN_1(J516) lines from CCONT Check PDATA0–line D200 pin 171 Check PDATA0–line for short circuits NO Change duplexer Check C500, L505, if OK change N500 N500 pin 23, loading 10 k Ω YES N500 pin 20, loading 8k2 Ω NO 1st IF 71 MHz YES N500 pin 7 and 8, SL: –57
Original 08/98 N540 pin 37 and 38, loading 5 k Ω YES Check N540 pin 37 and 38 for short circuit NO Check soldered joints of N540 NO NO NO NO NO Change N540 N540 pin 37 and 38 DC–level ~1.7V YES YES N540 pin 35, 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.
Page 24 Change N540 NO Check R541 and R542 NO NO Check soldered joints, if OK change Z540 N540 pin 25 and 26, DC–level, ~1.4V YES NO Check R540 and soldered joints Change N250 (Cobba) NO NO NO Change N250 (Cobba) YES N540 pin 23 and 24 DC–level ~1V Change N540 YES N540 pin 36 ~1.2V YES N540 pin 35 ~2.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Receiver Fault (4) UHFLO NO G600 VCC–pin voltage, 2.8V Check VSYN_1–line and R603 YES NO G600 VC voltage ~2.25V (Mid CH) YES Change G600 Check soldered joints at G600, N540 components in VC–line YES Does G600 oscillate at any frequency YES NO NO N540 pin 15, 13 MHz clock Change G600 Check soldering joints at N540, G600 YES N540 pin 9, 16 and 19 2.
Does the VCO oscillate at any NO frequency ? YES N540pins 9, 16 and 19 ~2.8V NO Check VSYN_2 supply voltage NO YES Check VSYN_1 supply voltage line to V621 Check VCP voltage line V621 base, ~ 1.7V NO Check R623, R622 and soldered joints YES V621 emitter, ~1V YES V621 emitter loading ~ 330 Ω if OK change V621 PAMS Original 08/98 Check V620, L629, C622, C623 NO Technical Documentation Change N540 NO YES YES N540 pin 13 and 22, ~ 5V V621 collector, ~2.6V NSE–6 NO N540 pin 12,~2.
NO Receiver Fault YES NO N250 (R660) voltage between 0.5 – 2.3V YES Check AFC–line for short circuits, if OK change N250 NO Use sevice software to set AFC to MAX AFC–voltage ~2.3V NO Check R660 and C660, if OK change N250 YES Main clock > 13 MHz NO Change G660 NSE–6 Page 27 NOTE ! If DSP in MAD does not work properly, supply voltages stays down.
Page 28 Check R507 and soldered joints NO NO NO NO Change N500 YES N500 pin 20, loading 8k2 Ω N500 pin 16, ~1.5V YES N500 pin 1 and 29, ~2.8V YES UHFLO Check C760, C761, L760, L761, R760, R761, if OK change N500 N500 pin 2 and 3, loading > 1M Ω YES NO NO NO Transmitter 1 YES N500 pin 30, SL: 2.
Z700 input, loading > 1 M Ω NO Check Z700 input for short circuits, if OK change Z700 PAMS NO Technical Documentation Z700 input, SL: +2.5 dBm – +5.0 dBm YES Transmitter Fault (2) Original 08/98 Transmitter 1 TXLEV5 YES NO Check Z700 output for short circuits, if OK change Z700 Z700 output, loading > 1 M Ω NO YES Z700 output, SL: 1.0 – 3.0 dBm YES NO Check C711 YES Check VBATT–connections to NO N550 N700 pin 3 ~3.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Transmitter Fault (3) Power Control TXLEV5 NO Transmitter working OK Transmitter Fault YES N250 H1, R740 TXC – pulse OK NO Check TXC – line from N250 pin 17, if OK change N250 NO V700 anode, DC–voltage ~0.
PAMS Technical Documentation NSE–6 Disassembly & Troubleshooting Instructions Appendix A Picture 1.
NSE–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Appendix B Picture 2. SCLK – signal Picture 3. SDATA – signal Picture 4.
NSE–6 PAMS Technical Documentation Disassembly & Troubleshooting Instructions Appendix C Picture 5. TXQP, TXQN, TXIP and TXIN – signal Picture 6. TXP – signal Picture 7.
NSE–6 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Appendix D Picture 8. TXC – signal (TXLEV5) Picture 9.
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