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Nokia NHM-2nx Series Troubleshooting Manual

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  Summary of Contents for Nokia NHM-2nx Series

  • Page 1 3URJUDPPHV $IWHU 0DUNHW 6HUYLFHV 1+0Q[Q\ 6HULHV 7UDQVFHLYHUV 7URXEOHVKRRWLQJ ,VVXH  $SULO  1RNLD &RUSRUDWLRQ...
  • Page 2 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 7DEOH RI &RQWHQWV 3DJH 1R &RPSRQHQW ,GHQWLILFDWLRQ  'LVSOD\ 0RGXOH 6XSSOLHUV   3RJR 3LQ 6XSSOLHUV  %DVHEDQG 7URXEOHVKRRWLQJ  %DVHEDQG 7HVWSRLQWV   3RZHU 6FKHPDWLF 7HVWSRLQWV  3RZHU 6FKHPDWLF  3ORWV  &38 6FKHPDWLF  7HVWSRLQWV  &38 6FKHPDWLF  3/RWV  )DXOW )LQGLQJ &KDUWV   3KRQH LV 'HDG ...
  • Page 3 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting &RPSRQHQW ,GHQWLILFDWLRQ 1+0Q[Q\ XWLOLVH GLIIHUHQW FRPSRQHQW EUDQGV 1RQH RI WKH FRPSRQHQWV PXVW EH VXEVWLWXWHG E\ RWKHU EUDQGV DV LW ZLOO FDXVH PLVDOLJQ PHQW LQ WKH SKRQH 7KH IROORZLQJ NH\ FRPSRQHQWV ZLOO EH VRXUFHG E\ XS WR WKUHH GLIIHUHQW YHQGRUV %HORZ LV D OLVW ZLWK SKRWRV WKDW ZLOO KHOS LGHQWLI\ ZKDW EUDQG RI FRPSRQHQW KDV EHHQ XVHG LQ WKH SKRQH &RPSRQHQW...
  • Page 4 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 5HI 1 5)0' 3$ 5HI * 9&7&;2 1'. 5HI * 9&7&;2 72<2&20 5HI ' 65$0 6$0681* 5HI ' 65DP $0,& 5HI = = 'XDO 5; 6$: (3&26 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 5 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 5HI = = 'XDO 5; 6$: 3DQDVRQLF 5HI = (*60 7; 6$: (3&26 5HI = (*60 7; 6$: 3DQDVRQLF 5HI ' )/$6+ ,17(/ 5HI ' )/$6+ 67 ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 6 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 5HI = *60 7; 6$: 3DQDVRQLF 5HI = *60 7; 6$: )XMLWVX 5HI * 9&2 )'. 5HI * 9&2 0DWVXVKLWD 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 7 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 'LVSOD\ 0RGXOH 6XSSOLHUV 7KH HDVLHVW ZD\ WR GHWHUPLQH WKH VXSSOLHU RI WKH GLVSOD\ PRGXOH LV E\ ORRNLQJ DW WKH FRQ QHFWRU DQG FRQQHFWRU FDYLW\ IURP WKH EDFNVLGH RI WKH PRGXOH 3KLOLSV 3KLOLSV GLVSOD\ PRGXOH KDV ODUJH ¦7§ VKDSHG FRQQHFWRU DQG ODUJH FRQQHFWRU FDYLW\ 6HLNR (SVRQ...
  • Page 8 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation %DVHEDQG 7URXEOHVKRRWLQJ %DVHEDQG 7HVWSRLQWV 7RSVLGH &RPSRQHQWV XE & & & / & 5 5 & & & 5 5 & - - & - - & - XE & & & 5 5 & 5 & & &...
  • Page 9 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting XE & & & 5 5 & 5 & & & 5 5 & - - & - & - - %RWWRP 6LGH &RPSRQHQWV XE XE XE 5 5 & & ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 10 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation XE & & & & & & & & - - & - & - - & 7HVWSRLQW 1HW 1DPH &RQGLWLRQ '&OHYHO $&OHYHO *HQHUDO 5 )ODVK RU PXODWHG 1RPLQDO 9 ((3520 ZULWH PLQ 9 PD[ 9 - &&217&6;...
  • Page 11 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 7HVWSRLQW 1HW 1DPH &RQGLWLRQ '&OHYHO $&OHYHO 5 96<1B 9&26 5) $FWLYH VWDWH 9 PLQ 9 PD[ 9 & 96<1B 9V\QWH 5) $FWLYH VWDWH 9 PLQ 9 PD[ 9 & 9PRG 5) $FWLYH VWDWH 9 PLQ 9 PD[ 9 & $FWLYH VWDWH 9...
  • Page 12 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 3RZHU 6FKHPDWLF  7HVWSRLQWV    &    &    &    &    &    &    5    &...
  • Page 13 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 3RZHU 6FKHPDWLF  3ORWV 6\VWHP 3RZHU RQ 5 3:521; 5)& & 385; 5 & 6\VWHP VOHHS FORFN )UHTXHQF\ LV  .+] & 6/((3&/. ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 14 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation &SX 6FKHPDWLF  7HVWSRLQWV & - - - 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 15 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting &38 6FKHPDWLF  3ORWV 6\VWHP FORFN )UHTXHQF\ LV  0+] & 5)& &REED FORFN )UHTXHQF\ LV  0+] - &2%%$&/. 3URJUDPPLQJ IODVK 385; 5 0%86 5 5 )%86>@  7[ )%86>@  5[ 5 ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 16 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation )DXOW )LQGLQJ &KDUWV 3KRQH LV 'HDG 3KRQH LV GHDG PHDQV WKDW WKH SKRQH GRHV QRW WDNH FXUUHQW ZKHQ WKH SRZHU VZLWFK LV SUHVVHG RU ZKHQ WKH ZDWFKGRJ GLVDEOH SLQ :'',6; LV JURXQGHG 1RPLQDO VXSSO\ YROWDJH WR WKH SKRQH LV  9 9EDW YROWDJH  ,I WKH EDWWHU\ YROWDJH LV EHORZ  9 WKH &&217 SUH YHQWV WKH SKRQH IURP SRZHULQJ XS The phone is dead...
  • Page 17 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting Because of the use of ìBGA components it is not possible to verify if there is a short-circuit in any of the lines to and from the MAD2WD1 and the SRAM/flash circuits. The fault finding diagrams for flash programming are as follows. )ODVK SURJUDPPLQJ GLDJUDP  Flash programming doesn’t work If fault information from Prommer is:...
  • Page 18 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation )ODVK SURJUDPPLQJ GLDJUDP  Flash programming doesn’t work Check for activity on control lines for SRAM : J323 External RAM error Defective SRAM (D302) (RAMSelX) Defective MAD2 (D300) or short circuit under the SRAM Algorithm file or alias Check the type of the not found.
  • Page 19 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting )ODVK H[FKDQJH SURFHGXUH 7R FKDQJH ' EDFNXS WKH RSKRQH LGHQWLW\ LQIRUPDWLRQ E\ XVLQJ :LQ7HVOD 2SHQ XQGHU 9LHZ WKH ZLQGRZ 3KRQH ,QIRUPDWLRQ ,I \RX FDQQRW VDYH WKLV GDWD HJ SKRQH GRHV QRW VZLWFK RQ EHFDXVH RI GHIHFW '  LW LV QHFHVVDU\ WR JLYH WKH SKRQH D QHZ LGHQWLW\ ,I \RX KDYH VDYHG WKH SKRQH LGHQWLW\ LQIRUPDWLRQ \RX FDQ QRZ UHPRYH ' DQG UHVROGHU WKH VSDUHSDUW  DOZD\V XVH DSSURYHG µ%*$ UHZRUN PDFKLQH IRU FKDQJLQJ DQ\ µ%*$...
  • Page 20 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 1RZ \RX KDYH FKRVHQ D 0&8 ,PDJH )LOH DQG 330 )LOH IRU \RXU SKRQH E\ SUHVVLQJ RQ WKH VTXDUHV ZLWK WKH WKUHH GRWV $W WKLV SRLQW LW LV QRW QHFHVVDU\ WR FKRRVH WKH ULJKW ILOH EHFDXVH WKLV 6:XSGDWH LV XVHG RQO\ WR PDNH LW SRVVLEOH WR SRZHU WKH SKRQH RQ $IWHU VHOHFWLQJ WKH WZR ILOHV \RX KDYH WR SUHVV WKH )ODVKEXWWRQ WR VWDUW WKH 6:XSGDWH 1H[W PHVVDJH ZLOO EH WKH IROORZLQJ...
  • Page 21 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 1H[W PHVVDJH \RX ZLOO JHW LV WKLV $IWHU SUHVVLQJ <HV \RX ZLOO JHW RUGHU WR 5HVWRUH 'HIDXOW 8VHU 6HWWLQJV  SUHVV 2. 1RZ \RX FDQ FORVH ZLQGRZ VKRZQ RQ WKH WRS RI WKLV SDJH E\ SUHVVLQJ &DQFHO ,Q WKH QH[W VWHS \RX KDYH WR RSHQ 6RIWZDUH  3URGXFWLRQ 'DWD (GLW 5HZULWH SURGXFW FRGH DQ +: YHUVLRQ RXW RI \RXU VDYHG SKRQH GDWD LQWR ZLQGRZ DQG SUHVV 6DYH...
  • Page 22 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 5HPHPEHU WR UHWXQH 5;7; YDOXHV DQG UXQ HQHUJ\ PDQDJHPHQW FDOLEUDWLRQ EHFDXVH DOO WXQLQJ GDWD LV ORVW DIWHU FKDQJLQJ ' 3KRQH 6WD\V 2Q RU LV -DPPHG ,I WKLV NLQG RI HUURU RFFXUV DIWHU IODVKLQJ WKH PRVW SODXVLEOH UHDVRQ LV RSHQ SLQV RQ DQ ,& 1RUPDOO\ WKH &&217 ZLOO SRZHU WKH SKRQH GRZQ DIWHU  VHFRQGV LI WKH ZDWFKGRJ KDV QRW EHHQ VHUYHG E\ 6: &RQQHFWLQJ DQ RVFLOORVFRSH WR - 'DWD6HO;...
  • Page 23 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 'LVSOD\ ,QIRUPDWLRQ  ¦&RQWDFW 6HUYLFH§ ,I WKH PHVVDJH &RQWDFW 6HUYLFH LV GLVSOD\HG RQH RU PRUH SDUWV RI WKH VRIWZDUH LV XQDEOH WR H[HFXWH SURSHUO\ $W WKH VDPH WLPH WKH ZDWFKGRJ LV WULJJHUHG DQG LV WKHUHE\ DEOH WR WHOO LI DQ HUURU KDV RFFXUUHG 6HOIWHVW IXQFWLRQV DUH H[HFXWHG ZKHQ WKH SKRQH LV SRZHUHG RQ DQG LI RQH RU PRUH VHOIWHVW IXQFWLRQV IDLOV WKH PHVVDJH &RQWDFW 6HUYLFH LV VKRZQ LQ WKH GLVSOD\...
  • Page 24 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 1R 1HWZRUN )RXQG 1R &DOO (VWDEOLVKHG :KHQ WKH SKRQH LV XQDEOH WR HLWKHU ILQG D QHWZRUN RU HVWDEOLVK D FDOO ERWK WKH 5) SDUW DQG WKH EDVHEDQG SDUW FDQ FDXVH LW 7KH SKRQH FDQ EH VHW WR UHTXLUHG PRGH 5) PHDVXUH PHQWV E\ WKH :LQ7HVOD VHUYLFH VRIWZDUH LQ RUGHU WR GHWHUPLQH LI WKH HUURU LV SODFHG HLWKHU LQ WKH 5) SDUW RU WKH EDVHEDQG SDUW 7KHUH DUH WZR FLUFXLWV WKDW VXSSOLHV WKH 5) SDUW RI WKH SKRQH 7KHVH FLUFXLWV DUH ...
  • Page 25 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 3KRQH 1RW 5HJLVWHLQJ WR D 1HWZRUN Phone doesn’t register to a network or the phone is unable to make a call C207 (Vcobba) > 2,7V Check CCONT (N201) Check C210, R509 and Vref at C201 =1,5V C536.
  • Page 26 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 6LP 5HODWHG (UURUV 7KH 6,0 LQWHUIDFH IURP WKH 0$':' ' WR WKH 6,0 FRQQHFWRU ; FDQ EH WHVWHG ZLWKRXW D 6,0 FDUG :KHQ WKH SRZHU LV VZLWFKHG RQ DQG WKH %6, WHUPLQDO LV JURXQGHG E\ D UHVLVWRU DOO LQWHUIDFH OLQHV 96,0 '$7$B$ 6,0567B$ 6,0&/. ULVHV ILUVW WR 9 WKH WR 9 7KLV LV UHSHDWHG IRXU WLPHV ,Q WKLV ZD\ LW LV SRVVLEOH WR ILQG HUURUV LQ WKH 6,0 LQWHUIDFH ZLWKRXW D 6,0 FDUG...
  • Page 27 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 6,0 FDUG UHMHFWHG HUURU "SIM card rejected" Vsim according to spec.: 2,8V min. (3V SIM card) Defective CCONT (N201) 4,5V min. (5V SIM card) ATR data can be seen at C222 towards Check X400 and R213 R213 ATR data can be Check CCONT (N201)
  • Page 28 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation ,QWHUQDO PLFURSKRQH Microphone doesn’t work and there aren’t any electrical or mechanical problems. C115 towards R115 (bias) Check R115, V101, = 2,1V C123, C113. Check mic-line to COBBA : Replace COBBA L402, C403, C407, (N100) C120, R111.
  • Page 29 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting &KDUJLQJ (UURU 1R GHWHFWLRQ RI FKDUJHU Nothing happens when a charger is connected to the phone The voltage at R210 towards Check F200, L202, R209, R210 R209 > 0,4V Replace CCONT (N201) ¦1RW &KDUJLQJ§ PHVVDJH "Not charging"...
  • Page 30 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 5) 7URXEOHVKRRWLQJ 7ZR W\SHV RI PHDVXUHPHQWV DUH XVHG LQ WKH IROORZLQJ ,W ZLOO EH VSHFLILHG LI WKH PHDVXUHPHQW W\SH LV 5) RU /)  ‡ 5) PHDVXUHPHQWV VKRXOG EH GRQH ZLWK D 6SHFWUXP $QDO\]HU DQG D KLJKIUH TXHQF\  RKP SDVVLYH SUREH IRU H[DPSOH +3$ 1RWH WKDW ZKHQ PHD VXULQJ ZLWK WKH  RKP SUREH WKH VLJQDO ZLOO EH DURXQG  G% DWWHQXDWHG 7KH YDOXHV LQ WKH IROORZLQJ ZLOO KDYH WKHVH  G% VXEWUDFWHG DQG UHSUHVHQW WKH UHDO...
  • Page 31 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 5) .H\ &RPSRQHQW 3ODFHPHQW 8E  8E 8E  8E  8E 5 5 DQG 5 GR QRW H[LVW RQ 8E 5 DQG 5 GR QRW H[LVW RQ 8E ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 32 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 1 3RZHU DPSOLILHU 3$ = 5;7; VZLWFK = 'XDO 5; 6$: ILOWHU (*60 *60 = 'XDO 5; 6$: ILOWHU (*60 *60 * 9&7&;2  0+] &U\VWDO RVFLOODWRU 1 +DJDU 5) ,& * 9&2  *+] 8+) 9&2 = (*60 7;...
  • Page 33 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 5; 7URXEOHVKRRWLQJ 8VH FKDUW EHORZ DV HQWU\ SRLQW IRU JHQHUDO 5; WURXEOHVKRRWLQJ Set to Local Mode Band = don’t care RX troubleshooting RX Burst mode Channel = don’t care Apply NO signal to antenna connector Measure RXI and RXQ with oscilloscope (500mV/div, 500us/div)
  • Page 34 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation Figure 1 I/Q working ok 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 35 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting Figure 2 Check C508 ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 36 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation Figure 3 Check C508 + C515 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 37 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting Figure 4 Check C508 ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 38 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation Figure 5 Check C512 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 39 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting Figure 6 Check C514 ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 40 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation Figure 7 Check C526 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 41 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting (*60 5HFHLYHU 7URXEOHVKRRWLQJ 5[ PHDVXUHPHQW SRLQWV XEB  XEB  XEB Rx/Tx switch, GSM1800 LNA, EGSM_Rx - RF out - C556 C519 LNA_P, GSM1800 - C568 GSM 1800 LNA, RF in - L505 Rx/Tx swicth, Rx SAW, GSM1800 out - VC1 - Z502...
  • Page 42 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation LNA_G, EGSM LNA in - EGSM - V501 C545 LNAB_D, EGSM - R508 Rx SAW EGSM LNA out / GSM1800 in - Rx SAW, Z500 EGSM in - C534 Rx SAW Rx SAW, GSM1800 out - EGSM out - Z500 Z500...
  • Page 43 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting Rx measurement points, ub4_10 / ub4_11. and ub4_12 Rx/Tx switch, LNAB_G, EGSM_Rx - GSM1800 - C556 R513 Rx SAW , EGSM out - Z501 Rx/Tx swicth, Rx SAW, VC1 - Z502 GSM1800 out - Z501 Rx/Tx switch, Rx/Tx switch, VC2 - Z502...
  • Page 44 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation EGSM LNA in - C545 LNAB_D, EGSM - R508 Rx SAW, GSM1800 in - EGSM LNA out / Z500 Rx SAW, EGSM in - C534 Rx SAW, LNA_G, GSM1800 out - EGSM - R514 Z500 RXIP and RXQP - R504...
  • Page 45 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting The set-up should now look like this: Apply a 942.667 MHz (channel 38 + 67.710kHz offset) -55 dBm signal to the RF-connector. Measuring with an oscilloscope on “RXIP” or “RXQP” this picture should be seen on a working EGSM receiver: Signal amplitude ~550mV...
  • Page 46 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation )DXOW ILQGLQJ FKDUW IRU (*60 UHFHLYHU Set to Local Mode EGSM RX EGSM RX continuos Channel = 38 Troubleshooting AGC abs. = 4 Apply -55dBm 942.667MHz signal from generator to antenna connector Check Spectrumanalyzer C593/L510 Signal Generator, -74dBm Antenna adapter...
  • Page 47 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting (*60 6LJQDO SDWK For easy error tracing it is important to know the signal path of the EGSM receiver. The components can be grouped into blocks and drawn as shown below. VRF_RX VREF Hagar INP_P_RX BIQUAD BB_Gain DNC2...
  • Page 48 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation *60 5HFHLYHU 7URXEOHVKRRWLQJ *HQHUDO LQVWUXFWLRQV IRU *60 5; WURXEOHVKRRWLQJ Connect the phone to a PC with the module repair jig. Start Wintesla-Service-Software and Select Product Alt+p Open… NHM-5 Select: Product Alt+p Band Select: Testing Alt+e RF Controls RX Continuous Alt+r...
  • Page 49 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting Signal amplitude ~570V DC offset 1,2V Frequency 67kHz If this picture is not seen not go to section Fault finding chart for GSM1800 receiver of this document ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 50 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation )DXOW ILQGLQJ FKDUW IRU *60 UHFHLYHU Set to Local Mode GSM1800 RX PCN RX continuos Channel = 700 Troubleshooting AGC abs. = 4 Apply -55dBm 1842.867MHz signal from generator to antenna connector Check Spectrumanalyzer C593/L510 Signal Generator, -76dBm Antenna adapter...
  • Page 51 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting *60 6LJQDO SDWK For easy error tracing it is important to know the signal path of the GSM1800 receiver. The components can be grouped into blocks and drawn as shown below. VRF_RX VREF Hagar INP_P_RX BIQUAD BB_Gain DtoS...
  • Page 52 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation The signal-path is through Z501 (In-band insertion-loss 3,5dB), through the matching circuit (C517 ) and to the GSM1800 LNA (V500, RFin). The LNA has about 18dB gain when it is "on" (LNAB_G = 2.8V and LNA_P = 0V). If the signal applied to the antenna-connector is more than –45dBm the AGC will gain-step the LNA (LNAB_G = 2.8V and LNA_P = 0V) which means the LNA Gain will now have negative gain (loss) of –12dB.
  • Page 53 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 5; 1RUPDO 0RGH 7URXEOHVKRRWLQJ After any repair, reflash, retuning etc. the receiver performance must be checked in normal mode. Place phone PWB in module repair jig or use service battery and antenna adapter, follow instructions in chart in chart below: Connect Phone to GSM tester, and...
  • Page 54 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation (*60 7UDQVPLWWHU V_ANT_1/ V_ANT_2 Controls VB_DET VTXLO_G OUTP_D_TX/ Dir. Coupler OUTM_D_TX TXI_0/TXI_180 Open collector TXQ_0/TXQ_180 OUTP_G_TX/ OUTM_G_TX Open collector VBATT 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 55 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 7; PHDVXUHPHQW SRLQWV XE  XE Rx/Tx switch, VC2 - Z502 Rx/Tx switch, VC1 - Z502 DET0 - C588 Rx/Tx switch, Rx/Tx switch, DCS_Tx ANT - Z502 (GSM1800) - C569 Rx/Tx switch, PA, Pout EGSM_Tx - L518 GSM1800 - N502 Antenna pad...
  • Page 56 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 7; PHDVXUHPHQW SRLQWV XE  XE  XE Rx/Tx switch, VC2 - Z502 Rx/Tx switch, VC1 - Z502 Rx/Tx switch, ANT- Z502 Rx/Tx switch, DET0 - C588 DCS_Tx (GSM1800) - C569 Rx/Tx switch, EGSM_Tx - L518 PA, Pout GSM1800 - Antenna pad...
  • Page 57 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting T503 unbalanced - TXI and TXQ - Z504 or C566 R541 and R548 T504 unbalanced *HQHUDO LQVWUXFWLRQV IRU (*60 7; WURXEOHVKRRWLQJ Start WinTesla-Service-Software and Select: Product Alt+p Band Select: Testing Alt+e RF Controls TX Burst Alt+b TX Data Type: Random Alt+d, r...
  • Page 58 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation Your screen should look like this: Measure the output power of the phone; it should be around 32 dBm. 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 59 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting )DXOW ILQGLQJ FKDUW IRU (*60 WUDQVPLWWHU )DXOW ILQGLQJ LQ RXWSXW SRZHU For the spectrum analyzer measurements in the following chart use the 500 ohm passive probe. Since the signal measured is bursted it is advised to set the analyzer to maxhold. Measure TX Measure TX Measure TX...
  • Page 60 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation )DXOW ILQGLQJ LQ PRGXODWLRQ The following plots show different situations of TX IQ measurements. Depending on the time the mod- ulation may cause the signal to look differently. For how to check Hagar and serial bus see section Hagar and serial interface. 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 61 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting *60 7UDQVPLWWHU *HQHUDO LQVWUXFWLRQV IRU *60 7; WURXEOHVKRRWLQJ Apply a RF-cable to the RF-connector to allow the transmitted signal act as normal. RF-cable should be connected to measurement equipment or to at least a 10-dB attenuator, otherwise the PA may be damaged.
  • Page 62 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 3DWK RI WKH WUDQVPLWWHG *60 VLJQDO Fault finding chart for GSM1800 transmitter Measure TX Measure TX Measure TX Measure TX With Osc check: Measure TX power power on "ANT" power on "Pout". power on "Pin". power unbal VTX = 2.7V + on DCS_Tx.
  • Page 63 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 0HDVXUHPHQW SRLQWV DW WKH 9&7&;2 9&7&;2 PHDVXUHPHQW SRLQWV XEB  XEB VCTCXO, Vtcxo (2.7V) - C543 VCTCXO, buffer VCTCXO, input - V502 26 MHz out - C546 RFC, 13MHz - L511 9&7&;2 PHDVXUHPHQW SRLQWV XEB XEB DQG XEB VCTCXO, Vtcxo (2.7V) - C543...
  • Page 64 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 9&2 PHDVXUHPHQW SRLQWV XEB  XEB T502 unbalanced VCOS - R202 *HQHUDO LQVWUXFWLRQV IRU 6\QWKHVL]HU WURXEOHVKRRWLQJ Start WinTesla-Service-Software and Select: Product Alt+p Band EGSM Select: Testing Alt+e RF Controls RX Continuous Alt+r Cont. Mode Ch: 60 Alt+o, 60 Measure the output of the VCO (G500) at T502 with spectrum analyzer and 500 ohm passive probe;...
  • Page 65 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting COBBA. Range of Vcon is 0.3 – 2.3 V. 0HDVXULQJ RQ WKH 9&7&;2 FRPSRQHQW 0HDVXULQJ RQ WKH 9&7&;2 EXIIHU ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 66 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 9&2 The VCO is generating frequencies in the range of 3420 – 3840 MHz when PLL is in function. These are divided by 2 or by 4 in HAGAR so that they can generate all channels in EGSM and GSM1800. Frequency of the VCO is controlled by dc voltage ( Vc ) coming from the loop filter.
  • Page 67 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting If the phone gets ‘dead’ very short time after the power is turned ON, possible reason for this might be that 13 MHz system clock signal is not coming to the BB. Use the following chart to find the problem. Oscilloscope Oscilloscope Oscilloscope...
  • Page 68 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation )UHTXHQF\ OLVWV (*60 )UHTXHQF\ OLVW 1+0   (*60 Frequency list NHM-5 GSM900 VCO TX VCO RX CH TX VCO TX VCO RX CH TX VCO TX VCO RX 880.2 925.2 3520.8 3700.8 890.2 935.2 3560.8 3740.8 63 902.6 947.6 3610.4 3790.4 880.4...
  • Page 69 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting *60 Frequency list NHM-5/NHM-6 GSM1800 VCO TX VCO RX CH VCO TX VCO RX CH VCO TX VCO RX CH VCO TX VCO RX 1710,2 1805,2 3420,4 3610,4 1729 1824 3458 3648 1747,8 1842,8 3495,6 3685,6 1766,6 1861,6 3533,2...
  • Page 70: Troubleshooting

    NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation +DJDU DQG VHULDO LQWHUIDFH In general, if phone is not in a sleep mode, Hagar chip is always active. This means that, as long as we have set the phone in Normal mode or in Local mode (either RX or TX band ) there is going to be some Hagar activities, which is controled through serial interface (SDATA,SCLK,SENA and HAGAR_RESET_X).
  • Page 71 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting First precondition for Hagar to be in active (ON) mode is that HAGAR_RESET_X should be high (2.8V) and VREF, which is Hagar reference voltage, at 1.35V. Easiest way to check these two voltages is by using oscilloscope with an standard passive probe (10kΩ/8pF).
  • Page 72 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation :LQWHVOD 7XQLQJ Prior to any tuning the phone should be initialised: Start Wintesla-Service-Software and Select Product Alt+p Open… NHM-5 Select: Product Alt+p Initialise Alt+I Normal Mode :KDW 5) WR WXQH DIWHU UHSDLUV Different repairs require different tuning. In general it is necessary to determine in which section the repair was done to establish which tunings to perform.
  • Page 73 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 5; &DOLEUDWLRQ The "RX calibration" is used to determine gain at different gain-settings for front-end and Hagar and needs to be done in both bands, but the calibration only have to be started once, it will automatically proceed to the GSM1800 band after EGSM.
  • Page 74 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation Click OK in the Wintesla window, now a new window pops up: Click Save in the Wintesla window, now a new window pops up: Change the level and frequency on the generator as the window tells you. Click OK in the Wintesla window, now a new window pops up: 3DJH  1RNLD &RUSRUDWLRQ...
  • Page 75 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting Change the level and frequency on the generator as the window tells you. Click OK in the Wintesla window, now a new window pops up: Click Save in the Wintesla window, RX Calibration is now completed ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 76 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 5; )LOWHU &DOLEUDWLRQ $XWRPDWLF This calibration is calibrating the Baseband filter inside Hagar, for this reason the calibration is not done in both bands. Select: Tuning Alt+t RX Measurements A window now pops-up: In the "Select Function" frame select RX "Filter calibration (Automatic)". No external signal is needed for this, just click "Measure", wait a few seconds and then click "Save Defaults"...
  • Page 77 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting 5; $0 6XSSUHVVLRQ $XWRPDWLF This calibration is tuning the AM suppression performance of Hagar mixers and will have to be done in both bands. If flash or Hagar has been replaced or Full Factory settings have been performed RX AM Suppression must be done.
  • Page 78 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation Click OK in the Winteslwindow, the RSSI value is updated in the RX Measurements window. Click "Save ". The "RX AM suppression tuning" is now completed in EGSM. Click “Yes” to proceed to PCN band *60 Select: Product...
  • Page 79 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting Click Measure, A window now pops-up: Connect an external generator to the antenna connector of the phone and set-up the generator. Click OK in the Wintesla window, the RSSI value is updated in the RX Measurements window. ,VVXH  $SULO  1RNLD &RUSRUDWLRQ 3DJH ...
  • Page 80 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation Click "Save ". The "RX AM suppression tuning" is now completed in PCN. 7; 3RZHU WXQLQJ This tuning must be done in both bands. (*60 Select: Product Alt+p Band EGSM Select: Testing Alt+e RF Controls A window now pops-up: Set Active unit to TX Set TX Data Type: to Rand...
  • Page 81 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting A window now pops-up: Tune level 19, 15, 5 and Base in accordance with the target values. Note: Target values may vary due to different PA vendors. Click calculate, check if the other levels match the targets, correct if necessary. Click Save when all values match the targets.
  • Page 82 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation *60 Select: Product Alt+p Band Select: Testing Alt+e RF Controls A window now pops-up: Set Active unit to TX Set TX Data Type: to Rand Click Apply Click Close Select: Tuning Alt+t TX Power… Alt+P 3DJH  1RNLD &RUSRUDWLRQ ,VVXH  $SULO  ...
  • Page 83 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting A window now pops-up: Tune level 15, 11, 0 and Base in accordance with the target values. Note: Target values may vary due to different PA vendors. Click calculate, check if the other levels match the targets, correct if necessary. Click Save when all values match the targets.
  • Page 84 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation 7; ,4 7XQLQJ This tuning must be done in both band Initial set-up EGSM Select: Product Alt+p Band EGSM Select: Testing Alt+e RF Controls A window now pops-up: Set Active unit to TX Set TX Data Type: to Cont1 Click Apply Click Close Go through the "Common tuning procedure for EGSM and GSM1800"...
  • Page 85 NHM-2/5nx,ny/6/9 PAMS Technical Documentation Troubleshooting ,QLWLDO VHWXS *60 Select: Product Alt+p Band Select: Testing Alt+e RF Controls A window now pops-up: Set Active unit to TX Set TX Data Type: to Cont1 Click Apply Click Close Go through the "Common tuning procedure for EGSM and GSM1800" described in section 11.6.2 of this document.
  • Page 86 NHM-2/5nx,ny/6/9 Troubleshooting PAMS Technical Documentation &RPPRQ WXQLQJ SURFHGXUH IRU (*60 DQG *60 Select: Tuning Alt+t TX I/Q… Alt+q A window now pops-up: The carrier (M2) and +67kHz (M3) signal should now be tuned to a minimum. The buttons in the "TX I and Q DC Offset:" will change the level of the carrier. The buttons in the "Amplitude and Phase Difference:"...

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