Related Manuals for Nokia RH-13 Series
Summary of Contents for Nokia RH-13 Series
- Page 1 CCS Technical Documentation RH-13 Series Transceivers Troubleshooting ãNokia Corporation Issue 1 11/02...
-
Page 2: Table Of Contents
Step 3. RX chain checking ..................40 TDMA1900 ........................42 Step 1. Local oscillator checking ................43 GSM1900 ........................46 Step 1. General checking ...................48 Step 2. Local oscillator checking ................48 Step 3. RX chain checking ..................51 Transmitter ........................53 Page 2 ãNokia Corporation Issue 1 11/02... - Page 3 Fig 8 Fault tree, accessory detection..................20 Fig 9 Fault tree, data cable....................21 Fig 10 Fault tree, sleep clock ....................22 Fig 11 Fault tree, Display/Keyboard lights................23 Fig 12 Fault tree, display ....................24 Fig 13 Fault tree, infra red ....................26 Issue 1 11/02 ãNokia Corporation Page 3...
- Page 4 Fig 48 Fault finding chart for TX VHF VCO..............68 Fig 49 Fault finding chart for UHF SYNTHESIZER............69 Fig 50 Auto tune TDMA .....................70 Fig 51 Auto-tune GSM ......................72 Fig 52 Fault finding chart ....................76 Page 4 ãNokia Corporation Issue 1 11/02...
-
Page 5: Transceiver Troubleshooting
• Pressing the power key • connecting a charger • RC-alarm function In the local and test mode the baseband can be controlled through MBUS or FBUS (FBUS is recommended) connections by a Phoenix service software. Issue 1 11/02 ãNokia Corporation Page 5... -
Page 6: Measurement Points
RH-13 Troubleshooting CCS Technical Documentation Measurement points Figure 1: UEM regulator's filter capacitors VR1B VR1A VCORE VFLASH VFLASH VANA VSIM Page 6 ãNokia Corporation Issue 1 11/02... -
Page 7: Fig 2 Bb Testpoints
RH-13 CCS Technical Documentation Troubleshooting Figure 2: BB testpoints RFCLK: Init clk 19.22MHz FLASH GSM 13MHz TDMA Issue 1 11/02 ãNokia Corporation Page 7... -
Page 8: Baseband Troubleshooting
• Infra red • Power up faults Power up sequence UEM acts as a HW master during start up • Vbatt limits: 2.1V for internal state machine, 3V triggering whole startup • Regulator sequencing Page 8 ãNokia Corporation Issue 1 11/02... - Page 9 •Initializes the DSP and concerning hw •Releases DSP reset -> DSP starts running Note: In the figure below RF_Clk frequency appears to be lower than 19.2MHz because of too low oscilloscope sampling frequency (2kS/s). Issue 1 11/02 ãNokia Corporation Page 9...
-
Page 10: Fig 3 Power Up Sequence
(B200) immediately when battery voltage is supplied. 4 Software running • Default value for Vcore is 1.5 volts and if software is running Vcore will rise to 1.8 volts. • Cbus (1.00MHz/GSM and 1.08MHz/TDMA) clock starts running. Page 10 ãNokia Corporation Issue 1 11/02... -
Page 11: Phone Does Not Start Up Normally Or Does Not Stay On
The easist way to check if software is running when phone takes abnormal amount of current is to measure cbusclk and Vcore. Dbus clock (programmable 9.72MHz TDMA, 13MHz GSM) is not automatically visible on test and local mode. Issue 1 11/02 ãNokia Corporation Page 11... -
Page 12: Flash Programming Does Not Work
Programmng ok, but phone doesn't start Go to flash failure chart Change UPP (D400) Flash Programming does not work Flash programming procedure • Phone communicates with prommer via production test pattern, using signals: Page 12 ãNokia Corporation Issue 1 11/02... - Page 13 • 12 volts can be supplied to Vpp (by prommer) to speedup flashing. • FLASH Program includes a package of MCU and DSP software and all default parameters for the phone. The tuning values will be added/rewritten during Flash/Alignment phase. Issue 1 11/02 ãNokia Corporation Page 13...
-
Page 14: Flash Programming Error Codes
Vpp from prommer - >Flash has dropped below the limit" C383 "The Prommer has not received Phone acknowledge Flash C583 to the message." C683 (C383-during algorithm download to target phone) Signals between UPP-Flash (C583-during erasing) (C683-during programming) Page 14 ãNokia Corporation Issue 1 11/02... - Page 15 (C584-during erasing) (C684-during programming) C585 Data block handling timeout" Flash C685 (C585-during erasing) (C685-during programming) Signals between UPP-Flash C586 "The status response from the Phone informs about Flash C686 fail." (C586-during erasing) (C686-during programming) Issue 1 11/02 ãNokia Corporation Page 15...
-
Page 16: Charging
Audio test box JBA-8 is needed. Audio loop (Audio test/Ext In Hp Out) must be switched on by Phoenix service software. This loop will connect audios only through UEM. In this case UPP is not used. Page 16 ãNokia Corporation Issue 1 11/02... - Page 17 UEM. In this case UPP is not used. 4 Run audio- loop selftest with Phoenix (BB Self tests/ST_EAR_DATA_LOOP_TEST). This loop will test the eardata/micdata lines between UPP and UEM. Issue 1 11/02 ãNokia Corporation Page 17...
-
Page 18: Earpiece Or External Microphone Line Does Not Work
Earpiece doesn't work Feed 1KHz to Xmic Run audio-loop Fail by JBA-8 and selftest with measure from phoenix earpiece Fail Check R157,L152, L158,C150,C164, C153, C165,R152, C156,C155,R164, R161,R153,R150, C159,C167,V153 Check Change UPP earpiece Change UEM Page 18 ãNokia Corporation Issue 1 11/02... -
Page 19: Microphone Or Xear Line Does Not Work
Figure 7: Fault tree, microphone fail Microphone doesn't work Feed 1KHz to Mic Run audio-loop Fail and measure from selftest with Xear by JBA-8 phoenix Fail Check C151,C152,C157,L151,C162, C168,C169,R156,R162,R166, R159,C154,C158,C161,C166, R163,L159,V152 Check microphone Change UPP Change UEM Issue 1 11/02 ãNokia Corporation Page 19... -
Page 20: Accessory Detection
Both values should go close to - HeadInt and HooInt zero (~0...50) ~1000 Fail Fail Calibrate ADC Check headint-line and check L152,C150,R152,C153, accessory R154, detection again C160,R153,R150,C159 Check hookint-line L159,R163,C158,R155, R151,C161,V152 Check bottom connector Change UEM Page 20 ãNokia Corporation Issue 1 11/02... -
Page 21: Power Supply For Data Cable
Check V151,V152,R161, C164,L158 Check bottom connector Change UEM Sleep Clock Missing/non-functional sleep clock causes • Entering sleep mode fails (higher current consumption -> shorter standby time) • Baseband self tests cannot be run Issue 1 11/02 ãNokia Corporation Page 21... -
Page 22: Fig 10 Fault Tree, Sleep Clock
Figure 10: Fault tree, sleep clock Sleep mode not working Fail Fail Check C203 Measure sleep clock Measure sleep clock from B200 &C204 from J404 Change UPP Change UEM Change B200 (D400) (D200) Page 22 ãNokia Corporation Issue 1 11/02... -
Page 23: Display/Keyboard Lights Do Not Work
Check R300 (Display) and Replace FAIL R301 (Keyboard) resistor(s) Check LEDs V300...V303,V310-V311 Replace FAIL (Display) and V304...V309 LED(s) (Keyboard) Use Display Test in Replace UEM Phoenix to set lights FAIL ON/OFF Issue 1 11/02 ãNokia Corporation Page 23... -
Page 24: Display Does Not Work
(BB Self Tests/ C302...C304 ST_LCD_TEST) Use Display Test in Phoenix to Replace Replace FAIL check if display elastomer display module works FAIL Replace display m odule Buzzer does not work Check spring connectors and C306. Page 24 ãNokia Corporation Issue 1 11/02... -
Page 25: Vibra Does Not Work
Check SIM reader's spring connectors, C390 (VSIM 3.0V) and R388. If SIM still does not work then probably the UEM or the UPP is broken -> change first one component and check the phone. Issue 1 11/02 ãNokia Corporation Page 25... -
Page 26: Infrared Does Not Work
BB Self Tests) in Phoenix Phoenix FAIL FAIL Measure Tx Data from Phone OK Measure Rx Data from IR module(pin3) IR module(pin4) 2.78V, 9.6/115.2kbps FAIL Change IR module UPP or UEM is faulty Change UEM Page 26 ãNokia Corporation Issue 1 11/02... -
Page 27: Rf Troubleshooting
Plate ends should NOT touch shield lid after lid is installed. Note also that there are no short circuits caused by plate ends on PWB. Issue 1 11/02 ãNokia Corporation Page 27... -
Page 28: Abbreviations In Fault Finding Chart
Phase Locked Loop Radio Frequency Receiver Time between pulses Transmitter Up converter (mixer and driver in same package) Ultra High Frequency Voltage of signal (measured with oscilloscope) Voltage controlled oscillator Very High Frequency Page 28 ãNokia Corporation Issue 1 11/02... -
Page 29: Receiver
Phoenix. Equipment needed for receiver troubleshooting: - Signal generator up to 2 GHz - Oscilloscope with 10x passive probe - Spectrum analyzer and active probe without attenuation block - PC with Phoenix SW Issue 1 11/02 ãNokia Corporation Page 29... -
Page 30: Path Of The Received Signal
AGC 1...31 dB, 5 steps 133.2 MHz (VCO / 2) mixer mixer 134.04 MHz (VCO / 2) Buffer Buffer BB filter BB filter AGC -6...36 dB, 7 steps, TDMA AGC -6...30 dB, 5 steps, GSM Page 30 ãNokia Corporation Issue 1 11/02... -
Page 31: Amps
Z 908 Z 906 input C heck signal level Not O K If coil L 802 is ok at L NA _a input replace duplex coil pad (L 802) filter Z 906 Issue 1 11/02 ãNokia Corporation Page 31... -
Page 32: Step 1. General Checking
(134.04 MH z) C heck signal level at Not O K Start synthesizer R eplace Safari N801 R X I/Q J808, J809, troubleshooting J818, J819 C heck U E M and start baseband troubleshooting Page 32 ãNokia Corporation Issue 1 11/02... -
Page 33: Audio Test
Please use Phoenix RF-control to set phone to the correct operation mode. Figure 15: RF Test Enable audio using Phoenix software (maintenance -> testing -> audio test mode -> set audio test mode). See picture below. Figure 16: Audio Test Issue 1 11/02 ãNokia Corporation Page 33... -
Page 34: Step 2. Local Oscillator Checking
5 Connect spectrum analyzer probe on the inductor L818 and record RX VHF VCO signal level and frequency. Signal level should be around -25 dBm and frequency 268.08 MHz. 6 Set spectrum analyzer settings as following: • Center frequency: 2030.88 MHz, Span: 200 kHz Page 34 ãNokia Corporation Issue 1 11/02... -
Page 35: Step 3. Rx Chain Checking
7 Measure and record the frequency and peak-to-peak voltage of RX I/Q signal from each test points. Voltage should be around 100 mVp-p and frequency 6.5 kHz +/- 3 kHz. Issue 1 11/02 ãNokia Corporation Page 35... -
Page 36: Tdma800
Z908 antenna connector input X900 Check signal level Not OK Replace diplexer at duplex filter Z908 Z906 input Check signal level Not OK Replace duplex At LNA_a input filter Z906 coil pad (L802) Page 36 ãNokia Corporation Issue 1 11/02... -
Page 37: Step 1. General Checking
1 Set signal generator frequency to 881.46771 MHz and level to -80 dBm. 2 Select RSSI measurement UI in Phoenix (Maintenance => GSM RSSI Meas). 3 Set Band to GSM850 and Rx/Tx channel to 189 Issue 1 11/02 ãNokia Corporation Page 37... -
Page 38: Step 2. Local Oscillator Checking
2054.0 MHz 1 Set phone receiver to continuous mode using Phoenix. 2 Set spectrum analyzer settings as following: • Center frequency: 266.4 MHz, Span: 200 kHz • RBW: 3 kHz, reference level: 0 dBm Page 38 ãNokia Corporation Issue 1 11/02... -
Page 39: Fig 21 Rx Vhf Vco Signal Level And Frequency
6 Set Rx/Tx channel to 189 using Phoenix. 7 Set spectrum analyzer settings as following: • Center frequency: 2029.2 MHz, Span: 200 kHz • RBW: 3 kHz, reference level: 10 dBm Issue 1 11/02 ãNokia Corporation Page 39... -
Page 40: Step 3. Rx Chain Checking
2 Set phone receiver to continuous mode with full gain using Phoenix. Figure 23: RF controls 3 Connect oscilloscope probe to one of the RX I/Q test points on PWB (all four testpoints J808, J809, J818 and J819 are located behind display) Page 40 ãNokia Corporation Issue 1 11/02... -
Page 41: Fig 24 Rx I/Q Signal
1 Set signal generator frequency to 881.46771 MHz and level to -60 dBm. 2 Set spectrum analyzer settings as following: • Center frequency: 133.2 MHz, Span: 200 kHz • RBW: 3 kHz, reference level: -20 dBm Issue 1 11/02 ãNokia Corporation Page 41... -
Page 42: Tdma1900
Only path from external RF connector to IF needs to be checked if AMPS/TDMA800/ GSM850 RX chain is OK. After down conversion (from RF to 134.04 MHz IF) both lower and upper band use same signal path. Page 42 ãNokia Corporation Issue 1 11/02... -
Page 43: Step 1. Local Oscillator Checking
Carrying out this step VCO signal of 1st and 2nd mixers can be checked. 2nd mixer RX VHF VCO frequency is constant 268.08 MHz but for the 1st mixer UHF VCO frequency depends on the channel. The UHF VCO frequencies for the 1st mixer are: Issue 1 11/02 ãNokia Corporation Page 43... -
Page 44: Fig 27 Rf Test
• RBW: 3 kHz, reference level: 10 dBm 7 Connect spectrum analyzer probe to the UHF VCO output and record signal level and frequency. Signal level should be around -5 dBm and frequency 2094.06 Page 44 ãNokia Corporation Issue 1 11/02... - Page 45 RH-13 CCS Technical Documentation Troubleshooting MHz. Output G802 8 Repeat measurement for channels 2 and 1998. Issue 1 11/02 ãNokia Corporation Page 45...
-
Page 46: Gsm1900
Z 908 Z 962 input Not O K C heck signal level R eplace duplex atL NA V 804 input filter Z 962 Chart is continued on the next page. Page 46 ãNokia Corporation Issue 1 11/02... - Page 47 MH z) C heck signal level Not O K at R X I/Q J808, Start synthesizer R eplace Safari J809, J818, J819 troubleshooting N801 C heck U E M and start baseband troubleshooting Issue 1 11/02 ãNokia Corporation Page 47...
-
Page 48: Step 1. General Checking
VHF VCO frequency is constant 266.4 MHz but for the 1st mixer UHF VCO frequency depends on the channel. The UHF VCO frequencies for the 1st mixer are: Channel 512: 2063.4 MHz Channel 661: 2093.2 MHz Channel 810: 2123.0 MHz Page 48 ãNokia Corporation Issue 1 11/02... -
Page 49: Fig 30 Rf Controls
Figure 31: RX VHF VCO signal level and frequency 4 Set Rx/Tx channel to 661 using Phoenix. 5 Set spectrum analyzer settings as following: • Center frequency: 2093.2 MHz, Span: 200 kHz • RBW: 3 kHz, reference level: 10 dBm Issue 1 11/02 ãNokia Corporation Page 49... -
Page 50: Fig 32 Uhf Vco Signal Level And Frequency
Signal level should be around -5 dBm and frequency 2093.2 MHz. Output G802 The result should be like in the picture below: Figure 32: UHF VCO signal level and frequency 7 Repeat measurement for channels 512 and 810. Page 50 ãNokia Corporation Issue 1 11/02... -
Page 51: Step 3. Rx Chain Checking
• If only one or two testpoints shows correct signal and rest of the testpoints are either deaf or signal is very small, the fault is probably due to Safari ASIC. • If the signal amplitude is correct but its frequency is something else than 67.71 Issue 1 11/02 ãNokia Corporation Page 51... - Page 52 L814 and L815 should be checked, as well. If they are OK and there is a signal at the input of 1st mixer, the problem is proba- bly due to faulty 1st mixer inside Safari. Page 52 ãNokia Corporation Issue 1 11/02...
-
Page 53: Transmitter
UEM TX I/Q DA-converters -> I/Q modulator and Digital gain step amplifier (SAFARI) -> Dual TX IF-BPF -> Up converter (mixer -> C904 -> driver) -> BPF -> PA -> Power detec- tor -> Duplex-filter -> Diplexer -> EXT RF-connector -> Antenna Issue 1 11/02 ãNokia Corporation Page 53... -
Page 54: Tdma1900, Gsm1900
Figure 36: TX signal path. 1900 VHF-PLL 356.4 MHz UHF-PLL 2G (÷2) 358.08 MHz (2063.4-2124 MHz, HB) 426.4 MHz (1003.08-1028.01 MHz,LB) 428.16 MHz 1900MHz 213.2 MHz 1900MHz 214.08 MHz 800MHz 800MHz 178.2 MHz 179.04 MHz Safari GTE Page 54 ãNokia Corporation Issue 1 11/02... -
Page 55: Fault Finding Charts For Transmitter
2. Connect RF-cable to Ext RF connector and connect cable to Spectrum analyzer input and measure RF level. Please notice insertion loss of the cable and attenuations. Figure 37: RF Test. Figure 38: RF controls. Issue 1 11/02 ãNokia Corporation Page 55... -
Page 56: Fig 39 Fault Finding Chart
(179.04 MHz) @ Change SAFARI C931&C932 N801 Input: -17 dBm +3 /-6 dB ***)Check TX RF 1) Check C904 (836.49 MHz) output 2) Change power @ U/C output U/C N902 RF: -5 dBm +/- 6dB Page 56 ãNokia Corporation Issue 1 11/02... - Page 57 *) GSM850 LO-signal freq. 1014.6 MHz and TX VHF-signal freq. 356.4 MHz **) GSM850 TX IF freq. 178.2 MHz and level –17 dBm ***) GSM850 TX RF freq. 836.4 MHz and level 0 dBm ****) GSM850 Itot 170 – 300 mA Issue 1 11/02 ãNokia Corporation Page 57...
-
Page 58: Tdma800, Gsm850
AMPS circuitry has no faults. TDMA1900, GSM1900 TDMA1900 and GSM1900 mode and DAMPS mode have a common RF modulator and thus it is important that DAMPS mode have no faults. Figure 40: TDMA1900. Figure 41: GSM1900. Page 58 ãNokia Corporation Issue 1 11/02... -
Page 59: Fig 42 Fault Finding Chart
MHz) U/C output power IL: -3dB @ Z961 input 2) Change U/C N902 TDMA +4 dBm +/- 6dB GSM +8 dBm +/- 6dB Check Z961 input and Change Z961 output power IL: -3dB Issue 1 11/02 ãNokia Corporation Page 59... - Page 60 Check duplexer Z962 , diplexer Z908 and RF connector X900 Change Z962 or Z908 insertion loss or RF connector Dupl IL ~2.2 dB Dipl ~0.35 dB RF conn ~0.1 dB Start Power control troubleshooting Page 60 ãNokia Corporation Issue 1 11/02...
-
Page 61: Power Control Loop
Table 3: TYPICAL DETECTED VOLTAGES AT POWER LEVELS PL2…PL10 800A 800D 1900 Pout TXPWRDET Pout TXPWRDET Pout TXPWRDET 25.7 27.3 27.3 23.3 23.3 23.3 19.3 19.3 19.3 15.3 15.3 15.3 11.1 11.1 11.1 -1.0 -1.0 -5.0 -5.0 Issue 1 11/02 ãNokia Corporation Page 61... -
Page 62: Gsm850/Gsm1900
NOTE: DAC VALUES MAY VARY ABOUT +/- 20%NOTE: TXPWRDET is difference between TX on burst and off burst. Table 4: Typical detected voltages at power levels PL0...PL19. Pout TXPWRDET Pout TXPWRDET, U_value 29.5 29.5 Page 62 ãNokia Corporation Issue 1 11/02... -
Page 63: Synthesizers
The 19.2 MHz oscillator frequency (G801) is controlled by UEM. This 19.2 MHz signal is connected thru SAFARI to PLL-circuits. All synthesizers use divided VCTCXO signal as a reference signal for Phase locked loop to provide correct LO-frequency. BB-PLL provides to the BB needed clock signals. Issue 1 11/02 ãNokia Corporation Page 63... -
Page 64: Fig 44 Fault Finding Chart For 19.2 Mhz Oscillator
RH-13 Troubleshooting CCS Technical Documentation Figure 44: Fault finding chart for 19.2 MHz oscillator START HERE! Is VCTCXO Change oscillating? VCTCXO 2.No 19.2MHz 1.No Check voltage C867 2.78 V Check resistor R816 Page 64 ãNokia Corporation Issue 1 11/02... -
Page 65: Rx Vhf Vco
Is oscillator locked to TDMA 268.08 C848, R808, C847, 3.No or GSM 266.4 R807, C846, R820, C870 check also R826 2.No Check resonator components: V801, C845, C871, L818 and DC block C821 Issue 1 11/02 ãNokia Corporation Page 65... -
Page 66: Bb Pll
Divider Resonator part * Data 324 or 325 BB VCO Divider 4 or 6 RF-IC RFCLK to BB GSM 13 MHz TDMA 19.44 MHz *Data are related to vctcxo frequency and mode selections. Page 66 ãNokia Corporation Issue 1 11/02... -
Page 67: Fault Finding Chart For Bb Pll
Change SAFARI Check loopfilter 1 START HERE components: Is oscillator locked to TDMA 77.76 or 3.No C878, R834, C881, GSM 78 MHz R835, C882 2.No Check resonator components: V805, C855, L829 and C893 Issue 1 11/02 ãNokia Corporation Page 67... -
Page 68: Tx Vhf Vco
1 START HERE Is oscillator locked to 356.4, 358.08, Check resonator 426.4 components: 3.No or 428.16 MHz V802, C850, L820, C874, C865 2.No Check operating Check: voltage: L819, R833 4.75 V at R833 Page 68 ãNokia Corporation Issue 1 11/02... -
Page 69: Uhf Synthesizer
Is EVM OK? 2004.8 - 2124 band Check loopfilter components and balun T801, Check C863,C862,C861, Low band: loopfilter C860,R806, Is divided components R815,R814,R813 signal OK? Check VCO Check resistor operatig R811 voltage: 2.78 V Issue 1 11/02 ãNokia Corporation Page 69... -
Page 70: Description Of Rh-13 Rf Auto-Tune Tunings
- If AFC DAC tuning value or step size is too low or high it might be due to faulty VCTCXO component. - (UEM) - (UPP) RX LP and AMP2 filter tunings - Tuning results are only visible after an unsuccessful auto-tune procedure Page 70 ãNokia Corporation Issue 1 11/02... -
Page 71: Tdma Tx Tunings
If some TX tunings fails, start always TX troubleshooting! TX IQ (TxIq) - Purpose of the tuning is to tune DC offset and phase offset so low as possible (test limit –40 dBc) If tuning fails there can be following problems: Issue 1 11/02 ãNokia Corporation Page 71... -
Page 72: Gsm Rf Tunings
- Crossband tuning is done only with PL2 If tuning fails there can be following problems: - Broken component: PA, Safari, up converter, some filters - Missing components GSM RF tunings Figure 51: Auto-tune GSM Page 72 ãNokia Corporation Issue 1 11/02... -
Page 73: Gsm Rx Tunings
(around 20 dB) If it fails there can be following problems: - Rx chain is totally deaf or some gain is missing, start receiver troubleshooting RX temperature calibration - NTC resistor calibration in ambient temperature Issue 1 11/02 ãNokia Corporation Page 73... -
Page 74: Gsm Tx Tunings
Purpose of this tuning is to tune all power levels GSM1900 (PL0 – PL15) and GSM850 (PL7 – PL19) If tuning fails there can be following problems: - Broken components: PA, Safari, up converter, some filters - Missing components TX crossband Page 74 ãNokia Corporation Issue 1 11/02... -
Page 75: Pa Troubleshooting For Salieri
- if it is after UEM then the current is high but not maximum. Compare the current consumption with a working phone. NOTE! To get specified current readings, turn module jig MJS-17 switches 2 and 3 ON for local mode. Issue 1 11/02 ãNokia Corporation Page 75... -
Page 76: Fig 52 Fault Finding Chart
VCC3 short. <100mA Remove Coil N901 850 L905.Current VCC3 short. <100mA Remove Coil N901 850 L977.Current VCC1/VCC2 <100mA short. Remove Coil N901 1900 L978.Current VCC1/VCC2 <100mA short. PA OK. Check UEM = BB troubleshoot. Page 76 ãNokia Corporation Issue 1 11/02...