CCS Technical Documentation RH-26 Series Transceivers 7 - Troubleshooting Instructions Issue 1 02/04 ©Nokia Corporation
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation [This page left intentionally blank] Page 2 ©Nokia Corporation Issue 1 02/04
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Table of Contents Page No RF Troubleshooting ....................................................................................................... 4 RF key component placement .....................................................................................6 RF measurement points ...............................................................................................7 GSM850, GSM1800 and GSM1900 Transmitter ...................
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RH-26 7 - Troubleshooting Instructions CCS Technical Documentation RF Troubleshooting Measurements should be done using a spectrum analyzer with a high-frequency highimpedance passive probe (LO-/reference frequencies and RF power levels) and an oscilloscope with a 10:1 probe (DC-voltages and low frequency signals) The RF-section is build around one RF-ASIC (HELGO N500).
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation RF key component placement Figure 1: RF key component placement - top side Page 6 ©Nokia Corporation Issue 1 02/04
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation RF measurement points Figure 2: RF measurement points - top side Issue 1 02/04 ©Nokia Corporation Page 7
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Figure 3: RF measurement points - bottom side Page 8 ©Nokia Corporation Issue 1 02/04
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation GSM850, GSM1800 and GSM1900 Transmitter General instructions for Tx troubleshooting 1 Connect test jig to computer with DAU-9S cable or to FPS-8 flash prommer with XCS-4 modular cable. Make sure that you have PKD-1 dongle connected to computers parallel port. 2 Connect DC power supply to module test jig with FLC-2 cable. Note: When repairing or tuning transmitter use external DC supply with at least 3A current capability.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation • Set Tx PA mode to "Free" (Default). • Set power level to 5 (Default = 19) on GSM850 or to 0 (Default = 15) on GSM1800 and GSM1900.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation PA/antenna switch troubleshooting diagram = beyond economical repair Issue 1 02/04 ©Nokia Corporation Page 11
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Pictures of transmitter signals Page 12 ©Nokia Corporation Issue 1 02/04
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Issue 1 02/04 ©Nokia Corporation Page 13
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Additional Information for EDGE troubleshooting Note! EDGE mode troubleshooting differs slightly from basic GSM troubleshooting. 1 Establish connection to the phone normally (see GSM850/GSM1800/GSM1900 troubleshooting instructions). 2 From the File menu, choose Product. 3 Select RH-26. 4 From the toolbar, set operating mode to “Local”. 5 To activate the RF Controls window: • From the Testing menu, choose RF Controls.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Transmitter EDGE troubleshooting diagram = beyond economical repair Issue 1 02/04 ©Nokia Corporation Page 15
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation PA & antenna switch EDGE troubleshooting diagram = beyond economical repair Page 16 ©Nokia Corporation Issue 1 02/04
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Pictures of EDGE transmitter signals Issue 1 02/04 ©Nokia Corporation Page 17
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation GSM850, GSM1800 and GSM1900 Receiver General instructions for Rx troubleshooting 1 Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prommer with XCS-4 modular cable. Make sure that you have PKD-1 dongle connected to computers parallel port. Page 18 2 Connect DC power supply to module test jig with FLC-2 cable. 3 Set the DC supply voltage to 4.2V.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation When measured with an oscilloscope on "RX_I" or "RX_Q", the following screens should be seen on a working GSM850, GSM1800 or GSM1900 receiver: 9 Correct signal amplitudes approximately: • GSM850~190mVpp • GSM1800~140mVpp • GSM1900~160mVpp Signal part frequency 67,7110 kHz sine. DC level of signal part is 1,30V. DC level can variate about +/- 100mV between I and Q signals and between different bands as well.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Used channel 37 input signal 942,46771 MHz, level –90 dBm at antenna port, AGC setting 12. Phase difference should be 90 degrees between I and Q signals at all bands.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Troubleshooting diagram for GSM1800 receiver = beyond economical repair Issue 1 02/04 ©Nokia Corporation Page 21
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Troubleshooting diagram for GSM 1900 receiver = beyond economical repair Page 22 ©Nokia Corporation Issue 1 02/04
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Synthesizer General instructions for synthesizer troubleshooting 1 Connect test jig to computer with DAU-9S cable or to FPS-8 Flash Prommer with XCS-4 modular cable. Make sure that you have PKD-1 dongle connected to computers parallel port. 2 Connect DC power supply or FPS-8 to module test jig with FLC-2 cable. 3 Set the DC supply voltage to 4.2V. 4 Set the phone module to test jig and start Phoenix service software.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Synthesizer troubleshooting diagram = beyond economical repair Page 24 ©Nokia Corporation Issue 1 02/04
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Pictures of synthesizer signals Issue 1 02/04 ©Nokia Corporation Page 25
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Baseband Troubleshooting These instructions show how to repair the baseband section of RH-26 transceiver. Since RH-26 transceiver shielding is made by using fixed shielding cans, there are some limitations for servicing work (see relevant service bulletins for more information). This is due to fact that when soldering new cans, component joints located under the shielding cans may be damaged.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Figure 5: Transceiver module - bottom view Issue 1 02/04 ©Nokia Corporation Page 27
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Faults by symptom SIM card The whole SIM interface locates in two chips: UPP and UEM. The SIM card is connected to UEM through EMI/ESD filter R388. The SIM card detection signal is taken from the BSI line. If the “Insert SIM card” text or other SIM related message appears on the display, check the following: • BSI contact is reliable. Very short break can cause “Insert SIM card” message.Typical DC-level is 1.19V with BL-5C.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Figure 7: SIM signals at start-up with 3V SIM card Display Display is a 130 * 130 dot LCD display with 4096 colors.The illumination is accomplished with 3 LEDs integrated into the LCD module as well as the display drivers mounted on the flex. Serial data transfer begins when UPP drives the CSX pin low and starts by setting bits to SDA. The bits are read by the display on the rising edge of SCLK. RESX GENIO(4) line is normally 1.8 V.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Figure 9: LCD signals Figure 10: Location of LCD-related components Keypad RH-26 phone includes traditional T9 and qwerty keypads. The keys on the engine board are connected through EMI/ESD filter Z300 (under UPP shielding can) to the KEYB(10:0) bus to the UPP. Volume up/down functionality is combined with joystick functionality. Two of the KEYB(10:0) lines are connected through EMI/ESD filter Z301 to the joystick.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Symptoms Flip does not work: • Check that flip connector contacts are reliable. Connector is properly assembled when clear snap can be heard when pressing it down. • Check DATA- and CLK-signals, see figures: Flip Test points and Flip CLK and Data. • Series coils L300,L301,L302 and VBAT, see Figure: Flip Test Points. • VBAT switch V320 is under UPP shielding and is always on when power is turned on.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Lights The total amount of LEDs is 19 pcs: 3 inside LCD, 8 assembled to engine and 8 to flip module. LCD and engine LEDs are powered from DC-DC converter D300 located under the UPP shielding. LCD and function keys are always illuminated when D300 is switched on. On/off control line is UIDRV(3) KLight. Engine side qwerty-LEDs have own switch V350 controlled by UIDRV(2) DLight line. Both controls are driven by UEMK D200.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Figure 14: Engine LEDs and series resistors Issue 1 02/04 ©Nokia Corporation Page 33
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Charging Charging is controlled by UEMK D200 and software. Two charger connectors are used: one in the system connector soldered to the PWB and one spring contact to DC-jack in the B-cover assy. If charging does not work, check: • DC-jack X102 spring contacts and system connector X101 solderings. • BTemp resistor R105. Typical voltage at +25°C is 0.9V.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation • ACI accessory detection/removal & controlling. • Standard FBUS. All lines are connected to engine through series components and if the connector itself and solderings are OK, check those components. If Vout voltage to accessories is missing, check regulator N100 located under the UEM shielding. Vout 2.78V is switched on when GENIO(0) is 1.8V.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Table 1: System connector interface description Pin # Signal Notes 1 VCHAR Charging voltage input 2 GND Charge ground 3 ACI Accessory insertion & removal detection / Serial data bi-directional 1 kbit/s. Pull-up to 2.78V when no accessories connected. 4 Vout 2.8V supply for ACI accessories. 0V when no accessories present.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Figure 18: System connector series components Audio The audio hardware is mostly integrated into the UEMK D200. External amplifier N150 is needed to drive the internal handsfree speaker (IHF). Other external components are functioning as capacitors, series resistors and ESD protection components. The required bias voltages for internal and external microphones are also taken from the UEMK.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Symptoms No voice from earpiece or bad quality. • Earpiece is integrated into LCD module and the whole module must be changed in fault situation. If change does not help, check L150 under RF-shield assembly and R160 under the UEMK shielding. No voice from microphone or bad quality. • Microphone is in B-cover assembly and it is a replaceable part. Needed bias for microphone is 2.1V, which is fed from AUDIO(4) MICB1 line through R165.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Figure 19: Location of audio components Figure 20: Location of earpiece-related test points Figure 21: Location of IHF-related test points Issue 1 02/04 ©Nokia Corporation Page 39
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Figure 22: Location of microphone pads Page 40 ©Nokia Corporation Issue 1 02/04
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Vibra Vibra motor M100 is soldered directly to the PWB and it is controlled by a PWM signal (UEM UIDRV (1) line). The other vibra pad is connected straight to VBat. If the vibra does not work, the possible fault is located in the vibra motor itself or in the UEM circuitry. Figure 23: Location of vibra motor Real time clock battery Regulator for charging back-up battery G300 is inside the UEM.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Hall sensor output is 2.78V when the flip is closed, 0V when open. Output is connected to the UEM via SLOWAD(2) KEYB1 line. If the flip is not recognised, check: • N301/pin 3 output = 0V. • N301/pin 1 = 2.78V. If not check R309. • Bring the magnet close. • If the pin 3 does not go up, change the Hall sensor N301.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation are needed (RF filters, power supply filtering, etc.) Bluetooth components are under the RF shield assembly. External 2.8V regulator N131 is used as a power supply for bluetooth internal regulator, which is switched on by PURX line. Antenna is integrated into the main PWB, same shape in all layers 1-8. In fault situation check: • There is no mechanical damage between test point J148 and antenna. • Output of N131 (VREG_IN) is 2.
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Figure 28: Camera test points Figure 29: Camera signals Page 44 ©Nokia Corporation Issue 1 02/04
RH-26 7 - Troubleshooting Instructions CCS Technical Documentation Baseband calibration All these calibrations should be performed by using the JBV-1 box, controlled by Phoenix through FPS-8. Calibration is done in the LOCAL mode. Manual calibration instructions: 1 Calibrate VBAT. • Set VBATT line to 3.1V and 4.2V (+/-20 mV) -> read AD-converter values and save them. • VBAT calibration is made in order to get correct battery voltage. 2 Calibrate BSI.
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