Related Manuals for Nokia NPC-1 Series
Summary of Contents for Nokia NPC-1 Series
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Page 1: Troubleshooting Instructions
Programmes After Market Services NPC-1 Series Transceivers Troubleshooting Instructions ãNokia Corporation Issue 1 10/01... -
Page 2: Table Of Contents
Path of the transmitted signall ................. 26 Fault finding charts for the transmitter..............26 Synthesizer Troubleshooting ..................30 19.44 MHz reference oscillator ................30 RX VHF VCO......................31 TX VHF VCO ......................32 UHF SYNTHESIZER ..................... 33 Page 2 ãNokia Corporation Issue 1 10/01... - Page 3 Fig 14 Detected voltages......................30 Fig 15 Fault tree: 19.44 MHz oscillator................31 Fig 16 Fault tree: RX VHF VCO..................32 Fig 17 Fault tree: TX VHF VCO ..................33 Fig 18 Fault tree: UHF Synthesizer ..................34 Issue 1 10/01 ãNokia Corporation Page 3...
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Page 4: Transceiver Troubleshooting
If the corresponding resistors are connected, the MCU software automatically enters into the local or test mode when the supply voltage is connected to the phone. The power can be switched on by: Page 4 ãNokia Corporation Issue 1 10/01... -
Page 5: Troubleshooting
1 Power up 2 Flash programming 3 Audio • Earpiece • Microphone 4 Charging 5 Accessory detection 6 Sleep clock 7 User interface • Display • Lights • Buzzer • Vibra • Keyboard Issue 1 10/01 ãNokia Corporation Page 5... -
Page 6: Power Up Faults
• the phone initialization, user interfaces, internal blocks etc. • Core regulator voltage setting for required DSP speed • Initializes the DSP and concerning HW • Releases DSP reset -> DSP starts running Page 6 ãNokia Corporation Issue 1 10/01... - Page 7 • Purx released by UEM, UEMINT goes high for 100 ms, SleepX goes high and UEM starts feeding SleepClk (32 KHz) to UPP. Note: The sleepclock starts running in the crystal circuitry (B200) immediately when the battery voltage is supplied. 3 Software running Issue 1 10/01 ãNokia Corporation Page 7...
- Page 8 The easiest way to check if the software is running when the phone takes an abnormal amount of current is to measure the cbusclk and Vcore. The Dbus clock (programmable 9.72MHz) is not automatically visible in the test and local modes. Page 8 ãNokia Corporation Issue 1 10/01...
- Page 9 Change the FAIL goes up to 1.8V UEM (D200) FAIL Measure J406. Should Re-flash phone be 1.08 MHz Programming Programmng ok, fails but phone doesn't start Go to flash failure Change UPP chart (D400) Issue 1 10/01 ãNokia Corporation Page 9...
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Page 10: Flash Programming Does Not Work
9 Prommer then sends the Algorithm Code corresponding to the HW parameters, and this algorithm, when run in UPP, takes over handling the MCUSW transfer to Flash. 10 12 volts can be supplied to Vpp (by the prommer) to speedup flashing. Page 10 ãNokia Corporation Issue 1 10/01... - Page 11 IDs received from the target phone." A387 "The MCU ID in the MCUSW.” C601 "The prommer has detected that Vpp volt- Vpp from prommer - >Flash age level has dropped below the limit" Issue 1 10/01 ãNokia Corporation Page 11...
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Page 12: Charging
If charging fails when the ACP-9 or the LCH-9 is used, and works with ACP-7, ACP-8 and LCH-8, check that the charge control pin of the system connector is connected to the ground. Page 12 ãNokia Corporation Issue 1 10/01... -
Page 13: Audio Failures
This loop will connect audios only through the UEM. In this case, the UPP is not used. In case the internal microphone/XEAR fails: Feed the tone to the microphone and measure the signal from the XEAR line. The Audio test box JBA-8 is needed. The Issue 1 10/01 ãNokia Corporation Page 13... - Page 14 Fault tree, earpiece fail Figure 4: 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 Check Change UPP earpiece Change UEM Page 14 ãNokia Corporation Issue 1 10/01...
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Page 15: Accessory Detection
MJS-18 test jig. Changes normally from high to low when no acces- sory is connected. 3 When the headset HDC-5 is connected, the hookint- value should be between 600 and 700. Issue 1 10/01 ãNokia Corporation Page 15... -
Page 16: Sleep Clock
Sleep Clock Missing/non-functional sleep clock causes • entering sleep mode fails (higher current consumption -> shorter standby time). • Baseband self tests cannot be run. • Phone clock (on display) does not function properly. Page 16 ãNokia Corporation Issue 1 10/01... - Page 17 Figure 7: Fault tree, sleep clock Sleep mode not working Fail Fail Check C203 Measure sleep clock Measure sleep clock &C204 from B200 from J204 Change UPP Change UEM Change B200 (D400) (D200) Issue 1 10/01 ãNokia Corporation Page 17...
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Page 18: Display/Keyboard Lights Do Not Work
Check R300 (Display) and Replace FAIL R301 (Keyboard) resistor(s) Check LEDs Replace V300...V303 (Display) and FAIL LED(s) V304...V309 (Keyboard) Use Display Test in Replace UEM Phoenix to set lights FAIL ON/OFF Page 18 ãNokia Corporation Issue 1 10/01... -
Page 19: Display Does Not Work
Run LCD test in Check Replace Phoenix capacitors FAIL FAIL capacitors(s) (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 module Issue 1 10/01 ãNokia Corporation Page 19... -
Page 20: Buzzer Does Not Work
Check that there is no dirt between the dome sheet and the PWB. If the keyboard still does not operate normally, try to use the Keyboard test in Phoenix to see if the pressed key is identified. If it is not identified, change the UPP(D400). Page 20 ãNokia Corporation Issue 1 10/01... -
Page 21: 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) 1.8V, 9.6/115.2kbps FAIL Change IR module UPP or UEM is faulty Change UEM Issue 1 10/01 ãNokia Corporation Page 21... -
Page 22: Receiver Troubleshooting
(Antenna/ext RF) – Diplexer – Duplexer – Low Noise Amplifier (LNA) – RX band filter – First mixer – 135.54 MHz RX IF filter – IF-amplifier – second mixer – 14 kHz low-pass fil- ter – adjustable IQ amplifier – Baseband. Fault finding charts for receiver chain AMPS Page 22 ãNokia Corporation Issue 1 10/01... - Page 23 Check UHF Vc (from Start synthesizer C773) V: 1.8 ...2.1 V troubleshooting Check RXVHF Vc Start synthesizer (from C720). V: 0.7 troubleshooting ...1.3 Apply 881.49 MHz -30dBm , sine signal to external RF-connector X900. Issue 1 10/01 ãNokia Corporation Page 23...
- Page 24 MIX1_A input. you should see strong RF signal (N801) level at 881.49 MHz. Exact level is difficult to define here because variable impedances in RX path. Also used probe type affects to the results. Page 24 ãNokia Corporation Issue 1 10/01...
- Page 25 Check RF level by signals at I: J801(+), Start synthesizer L730 without having J803(-) and Q: troubleshoot electrical contact at J804(+), J802(-) 271.08 MHz Change SAFARI (N801) Check UEM and start baseband troubleshoot Issue 1 10/01 ãNokia Corporation Page 25...
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Page 26: Transmitter Troubleshooting
2 Set the channel to 383 and the power level to 2. 3 Connect the RF-cable to the Ext RF connector. 4 Connect the cable to the Spectrum analyzer input. 5 Measure the RF level. Note: Insertion loss of the cable and attenuations. Page 26 ãNokia Corporation Issue 1 10/01... - Page 27 (180.54 MHz) @ Change SAFARI up converter IF: -20 dBm +3 /-6 dB Check TX RF (836.49 MHz) output power and Change up converter @ up converter RF: 0 dBm +/- 6dB Issue 1 10/01 ãNokia Corporation Page 27...
- Page 28 RF conn ~0.1 dB Start Power control troubleshooting TDMA800 The transmitter chain is exactly the same as the AMPS-mode, except for the IPA current, and thus it is important that the AMPS have no faults. Page 28 ãNokia Corporation Issue 1 10/01...
- Page 29 1771 21.5 1023 23.3 1228 17.5 19.3 13.5 15.3 11.3 -0.7 §0 -4.7 Note: DAC values may vary about +- 20% Note: TXPWRDET is the difference between TX on burst and off burst. Issue 1 10/01 ãNokia Corporation Page 29...
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Page 30: Synthesizer Troubleshooting
Baseband also needs a reference signal where it can generate necessary the clock signals and the VCTCXO output signal is also buffered and connected to the UPP. Fault finding chart for 19.44 MHz oscillator Page 30 ãNokia Corporation Issue 1 10/01... -
Page 31: Rx Vhf Vco
RX VHF VCO output signal is fed to SAFARI. Inside the SAFARI signal is divided for Phase detector and RX parts. Before I/Q-modulator frequency is divided by 2. Fault finding chart for RX VHF VCO Measure oscillator frequency over L730 coil. Do not connect probe to pads! AMPS, CH383 Issue 1 10/01 ãNokia Corporation Page 31... -
Page 32: Tx Vhf Vco
TX VHF VCO is 361.08MHz. The operating frequency is locked in the Phase locked Loop and the frequency is divided by two before modulator. Fault finding chart for TX VHF VCO AMPS, CH383 -> TX VHF frequency 361.08 MHz Page 32 ãNokia Corporation Issue 1 10/01... -
Page 33: Uhf Synthesizer
In AMPS & TDMA800, two GHZ UHF VCO frequency signal is first divided by two inside SAFARI and then that divided signal is fed to mixers. The output frequency of the VCO depends on the DC-control voltage which is controlled by PLL-circuit inside SAFARI. Issue 1 10/01 ãNokia Corporation Page 33... - Page 34 SAFARI 4. No START HERE! 2. No Is frequency locked? Is EVM OK? 2009.1 - 2059.02 Check loopfilter Check components loopfilter and balun components Check VCO operatig Check resistor voltage: R774 2.78 V Page 34 ãNokia Corporation Issue 1 10/01...