PAMS Technical Documentation RAE–2 Series Chapter 7 Troubleshooting Original 02/99 Copyright 1999. Nokia Mobile Phones. All Rights Reserved.
PAMS RAE–2 Troubleshooting Technical Documentation AMENDMENT RECORD SHEET Amendment Date Number 02/99 Page 7 – 2 Inserted By Comments Original Original 02/99
PAMS Technical Documentation RAE–2 Troubleshooting CONTENTS –Troubleshooting Page No Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 –5 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Finding faulty module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CMT Troubleshooting . . . . . . . . .
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the Memory Card interface . POST BEEP Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . UI Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mechanical Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . Keyboard Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CMT LCD Module Troubleshooting . . . . . . . . . . . . . . . . . . .
PAMS RAE–2 Troubleshooting Technical Documentation Introduction This document is intend to be a guide for localizing and repairing electrical faults in RAE–2 device. First there is short guide for fault localizing. Then fault repairing is divided into three troubleshooting paths, each per any module. Needed equipments are present before any actions. Before any service operation you must be familiar with RAE–2 product and module level architecture.
PAMS RAE–2 Troubleshooting Technical Documentation PDA modules basically work and the fault might be in UI module or flex connectors between PDA and UI module. Before CMT programming check that PDA goes to the ReLink mode (use BBS–5 service battery). After that you can replace the faulty module with the reference (Golden Sample) module and be sure that module is really faulty. Alternatively you can change the suspected faulty module to the reference RAE–2 device.
PAMS RAE–2 Technical Documentation Troubleshooting CMT Troubleshooting The following hints should facility finding the cause of the problem when the CMT circuitry seems to be faulty. This troubleshooting instruction is divided in main level to BaseBand and RF faults. The first thing to do is carry out a through visual check of the module. Ensure in particular that there are not any mechanical damages and soldered joints are OK.
PAMS RAE–2 Troubleshooting Technical Documentation CMT is totally dead This means that CMT doesn’t take current at all when the power switch is pressed or when the Watchdog Disable signal (J113) is rounded. Used battery voltage must be at least the nominal, 3.6 V. Phone is totally dead YES J111 VBAT is 3.6 V NO YES Failure in VBAT line Check X160,L103 Check shortcircuits NO Faulty circuit N110 J113 (PWRONx) 3.6 V YES J109 (VBB) 2.8 V N110 pin 25 (VXO) 2.
PAMS RAE–2 Troubleshooting Technical Documentation Power doesn’t stay on or phone is jammed Normally the power will be switched off by CCONT (N110) after 30 seconds, if the watchdog of the CCONT can not be served by software. The watchdog updating can be seen by oscilloscope at pin 50 (DataselX) of CCONT. In normal case there is a short pulse from ”1” –> 0 every 8 seconds. The power off function of CCONT can be prevented by connecting a short circuit wire from CCONT pin 29 (or J113) to ground.
PAMS RAE–2 Troubleshooting Technical Documentation Display Information: Contact Service This fault means that software is able to run and thus the watchdog of CCONT (N110) can be served. Selftest functions are run when power is switched on and the software is started to execute from flash. If any of the self–tests fails, Contact Service text will be shown on the display. Find out which circuit is faulty using the WinTesla software (select from Testing menu item Self Tests...
PAMS RAE–2 Troubleshooting Technical Documentation 1 dsp constants download init initialize patch code download initialization done MAD2 (DSPXF) J222 2 PSW search last PSW OK channel scan starts synchronization OK MAD2 (DSPXF) J222 3 send RACH RACH OK go SDCCH imediate assigment OK MAD2 (DSPXF) J222 Figure 3.
PAMS RAE–2 Troubleshooting Technical Documentation Phone doesn’t register to the network or phone doesn’t make a call YES Analog supply voltage VCOBBA is >2.7 V) at testpad J110 Check VCOBBA line and N110 (CCONT) NO YES Analog reference voltage Vref is 1.5 V at J107 Check R251 NO YES Supply voltage VCP (N110 pin 32) > 4.8 V Supply voltage VRX (N110 pin 9) > 2.7 V Supply voltage VSYN_1 (N110 pin 15) > 2.7 V Supply voltage VSYN_2 (N110 pin 4) > 2.
PAMS RAE–2 Troubleshooting Technical Documentation SIM card is out of order The hardware of the SIM interface from the MAD2 (D200) to the SIM connector (X150) can be tested without SIM card. When the power is switched on and if the BSI line (X160;2) is grounded by 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.
PAMS RAE–2 Troubleshooting Technical Documentation Audio fault Troubleshooting tree for Audio fault: Uplink (microphone) and downlink (earphone) are broken YES Voltage at resistor R260 is 2.8 V (without external audio devices) HOOKDET NO Check R259, R260 NO Check R257, R256, R261 YES Voltage at resistor R261 is 2.8 V (without external audio devices) HEADDET YES NO Frequency at J256 is 1 MHz, square wave 2.8 Vpp Fault in N250 (Cobba) YES NO Frequency at J257 is 8 kHz, square wave 2.
PAMS RAE–2 Troubleshooting Technical Documentation Downlink (earphone) is broken YES NO Digital PCM data at J258 during a call Fault in D200 (MAD2) YES DC voltage at capacitors C252 and C256 is 1.4 V during a call NO Fault in N250 (Cobba) YES Analog audio signal (some ten millivolts) at C252 and C256 during a call NO Fault in N250 (Cobba) YES Check earpeace connections to PDA module and earpiece signal routing from CMT to PDA. Figure 7.
PAMS RAE–2 Troubleshooting Technical Documentation Charging fault When you are charging totally empty battery, remember that start–up charging might take 2 minutes with ACP–9 charger and several minutes with ACP–7 charger. During this time display is blank. If charger is not NMP approved type then the software doesn’t start charging. Nothing happens when charger is connected YES Voltage level at pin 60 of CCONT (N110) is higher than 0.
PAMS RAE–2 Technical Documentation Troubleshooting Flash programming doesn’t work The flash programming is done over the system connector X170. In flash programming error cases the flash prommer can give some information about a fault.
PAMS RAE–2 Troubleshooting Technical Documentation selftest passed Figure 9.
PAMS RAE–2 Troubleshooting Technical Documentation Flash programming doesn’t work YES If the fault information from the prommer is: Note: When Relink OK, PDA display shows text ”Relink enabled”. a) MCU doesn’t boot b) serial data line failure c) serial clock line failure Check ReLink NOT OK PDA fault OK connect the short circuit wire J113 (WDOG) to ground OK EEPROM (D240) pin 8 (VBB) 2.8 V J704 (VXO) 2.8 V NO VBAT is correct 3.6 V YES N110 is faulty YES NO check C213, R213, V702 ...
PAMS RAE–2 Troubleshooting Technical Documentation Flash programming doesn’t work YES If the fault information from the prommer is: External RAM fault YES Check pins of SRAM (D220) Check control lines of SRAM: RAMSelX ... Flash programming doesn’t work YES If the fault information from the prommer is: Algorithm file or alias ID don’t find, ID is unknown etc.
PAMS RAE–2 Technical Documentation Troubleshooting RF Fault Here is a block diagram for repairing the RF section. First select the fault and follow the diagram. Required Servicing Equipment: – PC for the Wintesla – Power supply – Digital multimeter – Oscilloscope – Spectrum analyzer – GSM MS test set – Signal generator – RF probe – Phone test jig Test Points on BS8 Module Test points are placed on baseband for service and production trouble shooting purposes in some supply voltage and signal lines.
PAMS RAE–2 Troubleshooting Technical Documentation D220 Flash Chip Select MCUAD18 ExtSysRSTX MCUAD19 MCUGenIO8 MCUGenIO11 MCUGenIO10 MCUGenIO13 MCUGenIO12 MCUGenIO14 MCUGenIO15 D210 Flash Write Protection McuGenIO1 N120 MCUGenIO09 DSPXF RFClk D200 AccRxData ROW5LCDCD VB COBBAAd0 COBBACKL COBBADAX PCMSLCK PCMRxData PCMDCLK PCMTxData SLCLK TestMode AccTXData McuGenIO4 32kHz GENSCLK CCONTINT V5V COBBADa0 ResetX PURX GENSIO PWRONx DSPGenOut1 VBB N110 VCXOPwr RFIRdX RFI
PAMS RAE–2 Troubleshooting Technical Documentation Test Point Name Description J100 32kHz 32kHz clock from BS1 module J103 CCONTINT CCONT interrupt output J105 GENSCLK Serial data clock J106 GENSIO Serial data J107 VREF Reference voltage J108 V5V Supply voltage for flash programming (Vpp) and RF circuits.
PAMS RAE–2 Troubleshooting Technical Documentation Transmitter fault Troubleshooting tree for Transmitter fault: Ref1 ref2 ref3 ref4 ref5 Figure 12.
PAMS RAE–2 Troubleshooting Technical Documentation ref6 ref7 ref8 ref9 ref10 ref11 ref12 Figure 13.
RAE–2 Troubleshooting PAMS Technical Documentation Receiver fault Troubleshooting tree for Receiver fault: Page 7 – 26 Original 02/99
PAMS RAE–2 Troubleshooting Technical Documentation AFC Fault Troubleshooting tree for AFC fault: Figure 14.
PAMS RAE–2 Troubleshooting Technical Documentation 1st IF Troubleshooting tree for First IF fault: ref19 ref20 ref21 ref22 ref23 N690 ref24 Figure 15.
PAMS RAE–2 Troubleshooting Technical Documentation 2nd IF Troubleshooting tree for Second IF fault: ref25 ref26 ref27 ref28 ref29 ref30 ref31 900X910 Figure 16.
PAMS RAE–2 Troubleshooting Technical Documentation UHF LO Troubleshooting tree for UHF LO fault: Figure 17.
PAMS RAE–2 Troubleshooting Technical Documentation VHF LO Troubleshooting tree for VHF LO fault: 2.5V 1.2V 1.8V Figure 18.
PAMS RAE–2 Troubleshooting Technical Documentation PDA Troubleshooting and Service The purpose of this sectionis to provide methods to find the component that is malfunctioning in the PDA module of the RAE–2. Due to the large integration scale of used components, it is always not possible to point the faulty component for sure. However the flow diagram introduced here is made to fulfill the aim as well as it is possible.
PAMS RAE–2 Troubleshooting Technical Documentation BS2 PDALCD CMT Keypad Softkeys CMT LCD CMTLCD(5:0) GND Flex connector FLASH 1Mx16 LCD PWR IF(6:0) FLASH 1Mx16 X800 BS1 FLASH 1Mx16 D6:0 SA1:0 VSYS PWRU C(3:0), R(1:0) MA(11:0) D(15:0) LCD(10:0) VPDA io(3:0) V28_3 VBATT Charging control (6:0) VBACK QWERTY Keyboard C(7:0), R(9:0) Audio io(1:0) Earpiece HF HF_IF(1:0), EAR(1:0) RS_IF(2:0) x32 io(3:0) MBUS FBUS_TXD FBUS_RXD io(5:0) FBUS_RXD FBUS_TXD FBUS_TXD2 MBUS Test– pad
PAMS RAE–2 Troubleshooting Technical Documentation BS1 PDA Components The following components of the BS1 have an dramatic effect to the functionality of the module, a fault in any of these may cause the module to appear totally ‘dead’: – PDA power unit – CPU – PLL clock generation circuit – UCS Flash chip If the device has some functionality, then the following components, along with the ones above, can be tested: – DRAM chip – CS1 and CS0 Flash chips – Handsfree speaker circuitry – Earpice circuitry –
PAMS RAE–2 Technical Documentation Troubleshooting BS1 Troubleshooting The highest level of the RAE–2 PDA troubleshooting diagram is shown in the following figure. All the diagrams are made assuming that there is no visible faults, such as short–circuits or loose pins, on the PDA. The module check begins with connecting the supply voltage to the PDA. If the current consumption differs a great deal from the normal limits, it is good to proceed to the Power–On check.
PAMS RAE–2 Troubleshooting Technical Documentation PDA MODULE CHECK Connect VBatt Current consumption OK? YES NO See Power On malfunctions Respond to wintesla? YES NO See Power On malfunctions POST–code check PLL clock circuits check DRAM check Flash memories check LCD check Backlight check keyboard check Serial connections check IR check Lid Switch check Handsfree speaker check Earphone check Memory card interface check OS BOOT GEOS Usage Test OK Figure 20.
PAMS RAE–2 Troubleshooting Technical Documentation Power–on malfunction The following picture illustrates the troubleshooting diagram for Power– On malfunctions. Start POST BEEP Code error? Vsys OK? E312 NO YES CPU related error? NO YES NO INT_PLL OK? J400 (1.4MHZ) Memory fault YES NO Check PLL–circuit YES Memory fault Bus activity? D/A, R/W, CS J440–J449 NO Reset OK ? J449 Check PDA power unit YES 5.
PAMS RAE–2 Troubleshooting Technical Documentation Power Circuitry Check The following figure illustrates how to check power circuits. The upper part of the flowchart must be passed before the swicthable voltages (lower part of the flowchart) can be considered to be alright. The LCD temperature compensation affects the LCD bias voltage values.
PAMS RAE–2 Troubleshooting Technical Documentation Check CMT Power check YES VBATT OK? NO Board to board connector OK? YES VPDA OK? NO NO Change connector Check Input filter YES VBACK OK? NO Power ASIC fault YES VSYS OK? RESET OK? YES Power ASIC fault NO YES NO Check R461 – R463 R469 R493 – R495 YES NO YES BATTDET YES OK? VCOMP1 OK? NO N496 OK? NO Change N496 SELECT TROUBLE RELATED BRANCH (If you can not enable some voltage, try enable some other to be sure that CPU and bus from
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the PLL clock generation circuit The following diagram illustrates how to check PLL clock generation circuits. PLL Circuit check X32_CLK OK? J401 NO Vback OK? E307 PLL intermediate voltage 1.2V? J430 Check power ASIC N450 YES YES NO NO XTAL OK? 32kHz J434, J435 1.
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the DRAM The following figure illustrates how to check DRAM. Open DRAM test in WInTesla and select RandomTest. If test passed DRAM should be alright. If the test is not passed, run test again and measure the data and control lines activity. DRAM check Start the DRAM Random test DRAM test succesful? NO Bus activity? (R/W, CAS, RAS, ADD) J446–J449 J4555,J456 NO CPU fault YES YES DRAM OK DRAM or CPU fault Figure 24.
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the Flash memories The PDA comprises two kind of flash memories, two XIP (eXecute In Place) flashes and one RFD flash. The XIP flash can be checked by comparing image checksum and calculated checksum. If you can read and write from/to RFD flash, it is likely to be OK.
PAMS RAE–2 Troubleshooting Technical Documentation XIP Flashes check Read image checksum Compare calculated checksum and image checksum Are Checksums equal? Flash fault NO Bus activity ? (AD, D, CE, WE) J441, J442 J453, J454 YES YES NO Flash status output STSx(J451 or J452) OK? YES NO XIP flashes OK CPU fault CPU fault RFD flash check Write to RFD flash Read from RFD flash Flash fault NO write and read OK? NO Bus activity ? (AD, D, CE, OE, WE, WP) J440, J442–J444 J453, J454 YES YES F
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the LCD The idea of the following diagram of the LCD Check is to make the difference whether the LCD BS2 module or the PDA BS1 is broken. The case where the fault is in the BS2 module is beyond the scope of this document. The fix in that case is likely the change of the whole module. 0. Start 1. NO LCD ON? 1.1 Disconnect UI flex YES 1.2 V28_1 OK? N450/22 NO 1.2.1 V28_OUT active? N450/61 YES NO 1.2.2 CPU fault 1.
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the PDA LCD Backlight This troubleshooting diagram describe troubleshooting procedure on the PDA LCD backlight. If PDA is OK, look then backlight troubleshooting procedure from next chapter UI TROUBLESHOOTING. PDA LCD Backlight check Check hinge flex connector Enable backlight NO Backlight OK? NO Disconnect hinge flex YES NO YES Backlihgt OK CPU fault Figure 27.
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the PDA Keyboard This section describe PDA keyboard troubleshooting procedure. Possible cause to keyboard faults are keyboard interface in CPU, broken keymat or keydomes (UI) . Also, dirty keymat or keypad area can cause the fault.
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the serial connections External bus connection is alright if the device is PINGing, if not is good to check system connector and discrete components on RX and TX lines. External bus use RS232 data protocol, but signal voltage levels on PDA and system connector are only 2.8V digital voltage levels. External buffer cable needed (DLR–2) for connecting to PC.
PAMS RAE–2 Troubleshooting Technical Documentation External RS check PiNG target? YES External RS OK NO Test connections OK? YES NO RX signal OK? (X810/8) TX signal OK? (X810/9) NO Repair test connections NO X810 V870, V871, R806 OK? YES Figure 30.
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the IR connection This section describe infrared connection troubleshooting procedure. IR test need Combox TDC–4 with IR transceiver JLP–1. Place PDA so that IR transceiver have clear light route to JLP–1 and run the IR test. If test not passed follow flowchart to find out the fault. IR shutdown is not in use.
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the lid switch The idea of this diagram is to find out whether the CPU or the reed relay circuit is not working. If CPU and reed relay circuit on PDA is alright, then possible cause of fault is magnet in lid.
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the HF Speaker The idea of this diagram is to find out whether the CPU, loudspeaker, or power amplifier or it circuitry is not working. Start VAMP OK? R855/R856 NO Check R891, R892 and C880 – C882, C892 YES Signal from COBBA OK? J881 NO Check COBBA on CMT YES PA–Enabled? N880/1 YES Signal amplified? N880/5,8 HFPA–Fault YES NO V880 OK? NO NO Change V880 Speaker fault Check CMT CPU Figure 33.
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the Earpiece The following diagram illustrates how to check earpiece connections on the PDA side. Run the wintesla buzzer test. If the sound is not good then check earpiece connections as following flowchart illustrates. Earpiece connection check Start buzzer test Buzzer sound Ok? YES Buzzer OK NO BZR_IF signal OK? J854 NO Check PDA CPU YES VAMP OK? (R855/R856) NO Check R891, R892 and C880 – C882, C892 Figure 34.
PAMS RAE–2 Troubleshooting Technical Documentation Troubleshooting Diagram of the Memory Card interface To check the memory card interface: Take a good memory card and place it in the memory card connector. Run Wintesla MMC test. If test failed then take memory card out and run test again. Measure memory card system voltage and bus signals when test running. If the signal and the card voltage are OK, then the interface is likely to be OK.
PAMS RAE–2 Troubleshooting Technical Documentation POST BEEP Codes 1 3 4 5 6 10 13 14 15 16 18 Page 7 – 54 Memory refresh is not working. Memory failure in 1st 64kB of memory. Timer T1 not operational. CPU test failed. Gate A20 failure. CMOS shutdown register failed. Exhaustive low memory test failed. Exhaustive extended memory test failed. CMOS restart byte can’t hold data. Address line test failed. Interrupt controller failure.
PAMS RAE–2 Troubleshooting Technical Documentation UI Troubleshooting Mechanical Troubleshooting In mechanical failures it is better to replace a whole unit or module than try to fix it in service.
PAMS RAE–2 Troubleshooting Technical Documentation CMT LCD Module Troubleshooting Start Display shows unexpected characters Display does not work What is the problem? Pixel line(s) missing. No Is display properly on its place? Yes LCD glass is probably mechanically damaged. Inspect and replace. Yes Remove and put the display back to its place and test again. Is display properly on its place? Can Vout voltage be measured from J715 when display is on its place.It must be 6...9 volts.
PAMS RAE–2 Technical Documentation Troubleshooting Figure 37. GENSCLK (J706) and LCDCSx (pin 5/H700) , LCD active after pressing a key. Figure 38. GENSCLK (J706) and LCDCSx (pin 5/H700), LCD inactive, serial bus used for communication between MAD and CCONT.
PAMS RAE–2 Troubleshooting Technical Documentation Figure 39.
PAMS RAE–2 Troubleshooting Technical Documentation PDA LCD Display Troubleshooting START Display does not work Bad picture quality What is wrong? Yes Large part of the display is black or dark blue or pixel line(s) is missing Make sure that the flex of the display is properly connected to X730. Does the display work now? LCD is mechanically damaged. Replace the display. No Yes Check C740–C744 and in BS2_10 R736–R739. Does the display work now? No Are V28_1 (J700) and LCD_ON (J701) about 2.
PAMS RAE–2 Troubleshooting Technical Documentation Figure 41. LCDD0 (J712) Figure 42.
PAMS RAE–2 Troubleshooting Technical Documentation Figure 43. M (J703) Figure 44.
PAMS RAE–2 Troubleshooting Technical Documentation Figure 45.
PAMS RAE–2 Troubleshooting Technical Documentation CMT Backlighting Circuit Troubleshooting When troubleshooting the CMT backlighting circuit, remember that backlighting goes off after a certain period from the last key pressing. START Is the voltage of pin 1/N700 higher than 3.0 V? Yes Check that EL panel contacts are OK. Does the backlight work now? No Yes Is VPDA voltage OK on UI board (J714)? No No Is CMT_BL_ON signal voltage at J710 about 2.
PAMS RAE–2 Troubleshooting Technical Documentation PDA LCD Backlighting Circuit Troubleshooting For PDA backlighting troubleshooting you can use test mode and WinTesla SW to set the backlighting on all the time. START Is the voltage of pin 1/N730 higher than 3.0 V? Yes Check that EL panel contacts are OK. Does the backlight work now? No Yes Is VPDA voltage OK on UI board (J714)? No No Is PDA_BL_ON signal voltage at J711 about 2.
PAMS RAE–2 Technical Documentation Troubleshooting Figure 48. Example of a typical EL driver output waveform, measured between pins 6 and 7 of the driver.
RAE–2 Troubleshooting Page 7 – 66 PAMS Technical Documentation Original 02/99
