PAMS Technical Documentation NSM–5 Series Transceivers Disassembly & Troubleshooting Instructions Issue 1 02/2002 Nokia Corporation
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation CONTENTS Disassembly of NSM–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Transceiver Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baseband Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . PCB Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAMS Technical Documentation NSM–5 Disassembly & Troubleshooting Instructions Disassembly of NSM–5 NSM–5 phone. NSM–5 phone disassembled.
NSM–5 Disassembly & Troubleshooting Instructions 1. 1. PAMS Technical Documentation Remove the battery. Step 1. Press the grip markings on both sides of the phone. 2. Step 2. Slide the top cover (A–shell) off the phone. 3. 4. 5. Step 3. Press the release springs on both sides of the frame and 4. slide the bottom cover (B–shell) off the phone. Step 5. Turn the phone around and remove the battery. Use the recess next to the SIM card holder. NOTE: SIM card can be removed after the battery removal.
PAMS Technical Documentation NSM–5 Disassembly & Troubleshooting Instructions 2. Remove the antenna. Step 1. Release the snap fixings by pushing slightly from both battery housing corners. Step 2. Release the snap fixings also from the other end of the antenna. Step 3. Remove the antenna from the main frame. Step 4. Visually verify all electrical contact points and that the antenna has not been damaged (note the 4 fixings).
NSM–5 Disassembly & Troubleshooting Instructions 1. 5. 4. 3. PAMS Technical Documentation Remove the UI module. Remove the frame screws (6 pcs) starting from number 1 (bottom left). NOTE: In assembly use reversed order. 2. 6. 3. NOTE: When assembling the screws, use 17 Ncm torque. Drive size is torx plus 6. Tightening torque is 17 Ncm. In assembly check that PWB is not bent. UI module can now be separated from the main frame/system module. UI module and system PWB apart.
PAMS Technical Documentation NSM–5 Disassembly & Troubleshooting Instructions 4. Remove the system PWB from the main frame. Be careful not to damage the metal gasket. Main frame assembly. Main frame disassembled.
NSM–5 Disassembly & Troubleshooting Instructions 5. PAMS Technical Documentation Removing battery connector and SIM spring. Slide the SRT–3 (Battery Connector Extractor Tool) towards the battery connector and it will be released from the main frame. To remove the SIM spring from the main frame turn the phone around. Use appropriate tool to unlock one end of the SIM spring. Release the other end of SIM spring and the spring will come off.
PAMS Technical Documentation NSM–5 Disassembly & Troubleshooting Instructions 6. Speaker and display removal. Remove UI module screws (2 pcs). NOTE: When assembling the screws, use 8 Ncm torque. To remove the display release the snap fixings on both sides of the module. Speaker can now be removed. NOTE: Do not damage the speaker contact springs.
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Transceiver Troubleshooting Baseband Troubleshooting Because of the underfilling of the MAD and combo memory, it is impossible to change those.
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Reference Signal J245* SCLK HAGAR (N505) SERIAL CLOCK MAD (D200) –> HAGAR (N505) J250 COBBA CSX COBBA (N250) CHIP SELECT MAD (D200) –> COBBA (N250) J251 COBBA SDA COBBA (N250) SERIAL BUS DATA MAD (D200) <–> COBBA (N250) J252 COBBA CLK COBBA (N250) SERIAL BUS CLOCK MAD (D200) –> COBBA (N250) J253 PCMRXDATA AUDIO RECEIVED DATA COBBA (N250) –> MAD (D200) J254 PCMDCLK AUDIO DATA CLOCK (512KHz) MAD (D200) –> COBBA (
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Reference Signal Note N310 PIN 8 LCDLED_ADJ LCD BACKLIGHT BRIGHNESS ADJUSTMENT R310 –> UI–SWITCH (N310) N310 PIN 9 LCD LIGHT LCD LED LIGHT CURRENT UI–SWITCH (N310) –> DISPLAY BACKLIGHT LEDS N400 PIN 4 IRONX N401 PIN 4 IRDA POWER R118 PWRONX R206 SENA R211 VPP FLASH PROGRAMMING VOLTAGE N220 –> COMPOMEMORY (D210) R277 EAD ACCESSORY DETECTION XMICP –> CCONT (N100) IRDA (N400) SHUTDOWN MAD (D200) –> IRDA (N400
PAMS Technical Documentation NSM–5 Disassembly & Troubleshooting Instructions Troubleshooting Troubleshooting instructions are divided into following sections: How to check/fix the system/sleep clock. How to check/fix the power supplies. Contact service case. How to check/fix the SIM faults. How to check/fix the Audio faults. How to check/fix the charger faults. The first thing to do is to carry out a thorough visual check of the module.
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation System Clock Check the signal from the C213 Layout picture B signal RFC, should be like in SYSTEM CLOCK picture. IF NOT Check the signal from the RF side buffer input C829. If there is signal, check the R829,R834,R830,V800, C834 and L800 IF THERE ISN’T IF IS Check the signal from the RF side oskilator VCXO G830 output from C833. There should be 26MHz signal.
PAMS Technical Documentation NSM–5 Disassembly & Troubleshooting Instructions Sleep Clock Check the signal from the J228 Layout picture B signal Clk 32kHz, should be like in SLEEP CLOCK picture. IF NOT Check R100, R154, R102, C102, C101, C113 and B100 IF OK Change the CCONT N100 Sleep clock picture.
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Power Supplies Measure power supplies. Test points are shown in layout picture A.
PAMS Technical Documentation Vbb Vcore Vcobba Vref Vbat VXO VRX VTX Vsyn1 Vsyn2 NSM–5 Disassembly & Troubleshooting Instructions = 2.7V – 2.87V = 1.3V – 2.65V = 2,67V – 2.85V = 1.48V – 1.523V = 3.11V – 4.2V = 2,67V – 2.85V = 2,67V – 2.85V = 2,67V – 2.85V = 2,67V – 2.85V = 2,67V – 2.85V Power up sequence test: Cconts digital parts keep MAD in reset by keeping PURX down for a delay of 62ms. Here is shown the start up sequence picture.
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation B Page 18 Nokia Corporation Issue 1 02/2002
PAMS Technical Documentation NSM–5 Disassembly & Troubleshooting Instructions Phone is totally dead The phone doesn’t take current at all when the power switch is pressed or when the watchdog disable pin (X001 pin 11) is grounded. Make sure that the battery voltage you use is within the specification, i.e. 3.11 .. 4.2 V. If the voltage is lower, hardware of CCONT (N100) prevents power on. IF battery voltage is inside the specification Change the CCONT.
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation 1. MCU ROM checksum Calculates 16 bit checksum out of Flash code and compares it to one found in Flash. Items being checked are: MAD2 <––> Flash data and address lines, CE0,CE1, WE, BYTE, Vcc, GND, Flash internal functionality 2. MCU RAM interface 3. MCU RAM component 4. MCU EEPROM interface 5. MCU EEPROM component 6. RTC battery 7. CCONT interface 8. A/D converter 9. SW reset A. Power off B. Security data C.
PAMS Technical Documentation NSM–5 Disassembly & Troubleshooting Instructions SIM related faults The hardware of the SIM interface from MAD2 (D200) to the SIM connector (X302) can be tested without a SIM card. When the power is switched on and the BSI line 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.
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Audio faults earpiece doesn’t work and there isn’t any mechanical problem Check C 292, C291, L272 and L271 OK Change the COBBA N250 Microphone doesn’t work and there isn’t any mechanical problem Check the voltage in resistor R267 RF side head. Voltage should be about 2.
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Headset earpiece doesn’t work and there isn’t any mechanical problem Check R 257,R256, R270, L284, L283 C284, C283, C 296, C 297, C261and C255 OK Change the COBBA N250 Headset earphone doesn’t work and there isn’t any mechanical problem Check R 257,R256, R270, L284, L283 C284, C283, C 296, C 297, C261and C255 OK Change the COBBA N250 Issue 1 02/2002 Nokia Corporation Page 23
NSM–5 Disassembly & Troubleshooting Instructions PAMS Technical Documentation Charging fault Display ” not charging” Check charge voltage with wintesla Check F101, V100,R104 and R103 OK Check charge current with wintesla IF NOT OK Check V101 and R131 Page 24 OK Nokia Corporation Change the Chaps N101 Issue 1 02/2002
RX IN TX OUT 26MHz TXQP/N Vlna RXQP/RXIP PCN TX GSM TX GSMRX GSMTX PCN TX OUT OUT RXREF Vrxrf TXC TXP Vsynte TXIP/N Vref_2 VBATT RF Troubleshooting PAMS Technical Documentation Page 25 PCN RX VTXPCN Hagar_reset Vtcxo Vchp VCC Vapc VTXPCN PCN/GSM TX IN TXBUFF PCN TX GSMTX VCO OUT OUT_CP N702 Z670 Z620 Z600 G830 N505 G800 Z700 T600 T630 T740 T700 T800 V903 V904 L553 V730 V800 N600 Poweramplifier Antenna switch First RXSAW Second RXSAW VCTCXO(26MHz) Hagar RF IC VCO (3.
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