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Mobile phone service diagrams

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Philips GENIE, Motorola CD920, Siemens 2588, Nokia 6150, Nokia 3210, Nokia 6110 ,Ericsson 388(398) ,Motorola STAR TAC ,Nokia 8810
GSM GENI E MOBILE PHO> It damaged or unsoldered result transmission failure RF Power Control It damaged or unsoldered MZ202 result transmission failure T X filti It damaged or unsoldered result transmission failure RF Power Control This voltage abnormal result power failure or failing to search jftttork Voltage Regulator (5.0V) It damaged result reception failure or poor signal 2nd IF Filter It damaged result power failure, no network, no display, failing to identify card Code EEPROM (24C32) The CPU is COP packaged and it's including system version EEPROM and RAM,It damaged result power failure or no network. HCPU It damaged result power failure Power Supply Step Up 1╨б It damage d resul t power failur e Powe r Suppl y 1╨б TX Filter Front-end Mixer Amplifier It damaged result no network 2nd Local OSCVCO It damaged or unsoldered result no network It bad con signal, no power off 13MHz Clock Amp. Transistor It damaged result power failure It damage no netwo Voltage Regulator (3.0V) It's the power supply ofRXIF!Candl3*MHz OSC, it damaged result power failure pin 1:01 POWER pin4: (IN result po Can ben the simil NOKIA: RX IF 1╨б h It damaged or unsoldered result no network caused by no signal or signal too weak Transisti result fa voice RF Interface 1╨б It damaged or unsoldered result no RF signal, no network, no voice 32.768KHz Crystal It damaged result no time to display or displaying inaccuracy time Itabi time pow< Board Connector It poor contact result power failure, no network, no display, no ring, no voice or no card Ba fai l Voltage Regulator (3.4V) It damaged result power failure ONE SERVICE DIAGRAM It bad contac t result no signal, no network, power off when sending It damaged result no network pint: OUT, pin2: POWER; pin3: AFC; ptn4: GND It damaged result power failure. Can be replaced with the similar unit of NOKIA 811 0 13MH z Clock Ciystal OSC Transistor damaged result failing to send voice le to It abnormal result time inaccuracy or power failure >\\ or DC or Charging Socke t Bad contac t result failing to send voice It damaged or i result no network or power off when sending It damaged or unsoldered result no transmitting or power off when sending pi nl:IN;pi n2:CTL;pi n3: Vcc; pin4: OUT It damaged result no network. Can be replaced with the similar unit of 381 0 or G60 0 It damaged or unsoldered result no network Tip 2 is negative tip and tip 4 is positive tip, tip 2 and tip 3 should be short to powert-) when servicing Filtering Capacitors Capacitor leakage result power failure or no network Diode Inductor -
The step up circuit consist s of di ode, inductor and step up 1╨б. It damaged result power failure. GSM CD920 MOBILE PHONE Bad contact result no voice on earphone* speaker) Speaker Tips It damaged result poor reception quality IF Filter It damaged result failing to generate local OSC signal Q205 Local OSC Output Control These transistors make up 1st local OSC circuit. It damaged result no signal, no network. Q200/ Q206 Q201 Local OSC Amp Q202 1st Local OSC Transistor U370 damaged result transmission failure U370T X Mixe r It damaged result failing to record voice U980 Audio 1╨б It damaged or unsoldered result power failure, reception/ transmission failure U 720 Modem w f It damaged result failing to send voice MIC U403 Antenna Switch Control It damaged result T/R failure or power off when sending Q301 RF PA Positive Power Supply Switch It damaged result transmission failure or no network U340 RF PA Control It damaged result power off when sending TXVCOl TX VC02 TXVCO abnormal result no network, difficult to call SRAM It damaged result power failure. System i Version Flash ROM CPU J600 Plug тАвтАФ It damaged result power failure, no network, no display It damaged result power failure or system out of control Bad contact result power failure, no display. Background LED Driver It damaged result no background light Vibrator Driver U101 Negative Voltage Generator It damaged result transmission failure or no display )NE SERVICE DIAGRAM It damaged result _ reception failure It unsoldered result T/R failure or power off when sending It damaged result transmission failure Bad contact result no vibrate TX Filter Vibrator Socket It damaged result no network, transmission failure, power off when sending Background LED It damaged result transmission failure! It damaged result power failure It damaged result power failure 3 It damaged result [_ J Real Time time clock halt Bad contact result failing to recognize SIM card I It damaged result difficult to charge battery. It damaged result fail to supply when servicing or on board charge failure Bad contact result time display abnormal It damaged result reception failure It damaged result power failure It damaged result power failure, no signal, no network It damaged result no signal, no network It damaged result power failure It damaged result power failure, no card It damaged result failing to recognize SIM card It damaged result power failure, no voice, power off when sending Bad contact result failing to send voice GSM 2588 MOBILE PHONE It damage d resul t 1800MH z system unusabl e 1800MH z RX Filte r l( damage d resul t transmissio n failure, no networ k It damage d resul t no network. RF Power 1 Amp RXMU X I t damage d resu It transmissio n failur e of 1800MH z system It damage d resul t transmissio n failur e It damage d resul t powe r failur e 13MH z Cl o e k 4 l t d a i i n a 8 c d Crysta l failur e 13MH z Powe r Supply Pin 13MH z Clock Out Pin SI M C a r d l l resul t failing to Socket identif y car d I t damage d resul t no voice to send and to receiv e I t damage d resul t on boar d charge failur e It damage d resu It loss of stored informatio n It damage d resul t on boar d charge failur e Bad contac t resul t failin g to send voice Bad contac t resul t no networ k I t damage d resul t transmissio n failur e I t damage d or unsoldere d resul t low sensitivit y or no networ k Bad contac t I t damage d resul t failin g to identif y car d It damage d resul t no signal, no network, failin g to cal l It damaged result power failure Power r Supply 1╨б I t damage d or unsoldere d resul t powe r failur e or no networ k Dat a erro r or unsoldere d resul t powe r failur e or no networ k Bad contac t resul t on boar d charg e failur e ╨з╨Х SERVICE DIAGRAM It damaged resu It transmission failure TXVCO Earphone Tips It damage d resul t 900MH z system unusabl e 900MH z ╨ж RX Filte r It damage d or unsoldere d resul t no networ k RX Signal Processo r It generat e local OSC signal with VCO, when damage d resul t no networ k It damage d resul t failin g to identif y car d Frequenc y Synthesi s RXVCOl TX Signal Processo r SI M Car d Buffe r RXVC0 2 It damage d resul t no keypa d backgroun d light Keypa d LED Bad contac t resul t receip t voice abnorma l or no voice on earphon e It damage d resul t no signal to receiv e Four channe l signal modulate d by carrie r signal here It damage d or unsoldere d resul t transmissio n failur e or no networ k It damage d resul t no networ k Bad contac t resul t no displa y or abnorma l displa y Poor contac t resul t key press failur e j Filterin g Capacito r Leakag e of it resul t powe r failur e GSM 6150 DUAL FREQUENCY MOBILE ] 1800MH z RXPor t 1800MH z TXPor t It damage d resul t no networ k 2nd Local OSC VC O It damage d resul t no networ k or low sensitivity 2nd I F Filter VI0 1 damage d resul t no network, it supplie s power for RF circui t VI 0 1 Zener Diode (2.8V ) It damage d resul t power failur e 13MH z Clock Crysta l It damage d or bad contact resul t power failure, no voice, no ring, no display, no backgroun d light Boar d Connecto r It damage d resul t keypad failur e U20 2 Keypa d Interfac e It damage d resul t on-boar d charge failur e Externa l Interfac e IR Transmi t Diode 900MH z RX Port Y103RX╨пX Combiner It damage d or unsoldere d resul t no network or power of f when sendin g 900MH z TXPor t Rf Power Detecto r U10 3 900MH z RF Power Amp It damage d resul t transmission failur e U10 4 1800MH z Power Amp It damage d resul t failin g to enter 1800MH z networ k 1st Local OSC It damage d resul t no networ k 32.768KH z Time Clock Crysta l It damage d resul t no time displa y or time inaccurac y CPU It damage d resul t power failure, no network, no card, no display, keypa d failur e MIC It damage d resul t failing to send voice Bad contac t networ k or \ when sendin It damage d transmissioi It damage d ╨╛ resul t failing networ k It damage d re to transmi t b) system It damage d oi resul t no sign; sensitivit y Pin29: power Pin25: 13MH power supply logic circui t p supply Pin5/Pi circui t power It damage d re┬л failur e or no n Diode damage failing to iden SI M card It damage d re transmission 1 It damage d re failure, displa; no card It damage d res failur e or store It damage d res failur e or no m )BILE PHONE SERVICE DIAGRAM Bad contact result no network or power off when sending Antenna Tip it damaged result transmission failure Y106 900MHz TX Filter It damaged or unsoldered result failing to search network U101 Front-end Mixer Amp It damaged result failing to transmit by 1800MHz system U107 1800MHz TX Filter It damaged or unsoldered |__ result no signal or low sensitivity Y101 1st IF Filter Pin29: power on/off Pin25: 13MHz OSC power supply Pin55: logic circuit power supplyPin5/Pin9: RF circuit power supply It damaged result power failure or no network U203 Power Supply 1╨б Diode damaged result failing to identify SIM card Step Up Diode & Card Input Diode It damaged result IR transmission failure IR Control Transistor It damaged result power failure, display abnormal, no card U207 Code ROM It damaged result power fail ╨╕╨│╨╡ or stored data lost U208 RAM It damaged result power failure or no network U206 System Version ROM SIM Card Socket Bad contact result displaying f,Please insert card" Backup Battery Tip Tip poor contact or backup battery failure result data lost Battery Type/Battery, Temperature Battery (-) Battery (+) These four tips are same asNOKIA6I10andneed simulated battery to avoid power failure YI05 900MHz| RX Filter It damaged or unsoldered result no signal or low sensitivity. YI04 1800MHz RX Filter It damaged result 1800MHz system reception failure U102IFIC It damaged or unsoldered result no network U204 Audio 1╨б It damaged result no network, T/R no voice U203 Zener Diode (3.0V) U205 Charging _ Control 1╨б It damaged result chaining abnormally MIC Interface ~ It damaged result failing to send voice GSM 3210 DUAL FREQUENCY MOBIL] It damage d resul t chargin g abnormal l y Chargi n g Contro l 1╨б Antenna Tip Diode damage d resul t failin g to i denti f y SI M car d Bad contac t resul t no vi brat e It damage d resul t power failur e Batter y (+) Batter y (-) It damage d resul t failin g to ente r 1800MHz networ k It damage d resul t no networ k I t damage d resul t no networ k I t damage d resul t no network, it supplie s power for RF circui t It damage d resul t no networ k I t damage d resul t no networ k or low sensitivit y 32.768KHZ Ti me Cl oc k Crystal I t damage d resul t no ti me displa y or ti me inaccurac y Power Suppl y 1╨б I t damage d resul t powe r fai l ur e Vi brat o r [Ti p s Bad contac t resul t no vi brat e SIM Socket Bad contac t resul t fai l i n g to recogniz e SI M car d 900MHz RF Power Amp I t damage d resul t transmissio n fai l ur e Di recti ona l Coupl e r It damage d resul t transmissio n fai l ur e Front-en d Mi xi n g Ampl i f i e r I t damage d resul t T/R fai l ur e Fi l ter It damage d resul t no networ k J 1s t I F Filter It damage d or unsoldere d resul t no signal or low sensitivit y IF 1╨б 2nd IF Filter I t damage d or unsoldere d resul t no networ k BILE PHONE SERVICE DIAGRAM Bad contac t resul t no voice on carphonc(speaker ) It damage d resul t powe r failure, no networ k no card, no display, keypa d failur e It damage d resul t powe r failur e or no networ k It damage d resul t no network, T/R no voice No Keypa d LED when damage d System Version RO M Audio 1╨б Keypa d & Backgroun d LE D Interfac e Keypa d LED ╨║ 4 Buzzer I t damage d resul t no ring Displa y Screen Interfac e Code Memor y (EEPROM ) Dat a erro r can resul t power failure, failin g to call, low batter y warning, failin g to search networ k RAM I t damage d resul t powe r failur e or stored dat a lost RX/TX Combine r I t damage d or unsoldere d resul t no netw or k or powe r off when sendin g 13MH z Crysta l I t damage d resul t powe r failur e MI C Interfac e I t damage d resul t failin g to send voice GSM 6110 MOBILE PHONE Abnormal level result 13MHz phase-shift cause failing to search network AFC Level Test Point 13MHz Reference Clock Module Abnormal G530 result failing to search network G530 1006MHz-
1031MHz Local VCO Module ╨б an easily be damaged by seriously shock result power failure or low sensitivity Z62 0 13MH z BPF Z505 damaged result transmission failure Z505 \ 890-915 MHz Transmit BPF Abnormal 232MHz signal result reception -
failur e I. V580 232MHz OSC Transistor V581 232MHz OSC loop Poor contact or unsoldered result power failure, keypad failure, no voice on earphone, abnormal display. X300 Display Keypad Connect Socket R131 opened result on-board charge failure R131 on-board charging current overload protect resistor MIC damaged result failing to send voice MIC IRT/R Diode V550 RF Level Detector RF level is controlled by N620, N620 and V550 damaged result RF power amplifier breakdown because of RF level being out of control. N550 RF Power Amplifier Module N550 damaged result no network service Z500 935-960MHz Receiving BPF Z500 can easily be damaged or unsoldered by seriously shock to result low sensitivity or failing to search network N500 RF Prestage Module Abnormal Vref2 or N500 damaged result failing to search network Z621 IF BPF -
Z621 can easily be damaged or unsoldered by seriously shock to result receiving failure or low sensitivity B10 0 32.768KHz Crystal Bl 00 damaged result N100 work abnormal D200 CPU and Codec D200 damaged result power failure, T/R failure. ONE SERVICE DIAGRAM X540 Antenna Adapt Socket XI01 Battery Tips Battery (+) Tip X302 SIM Card Socket N100 damaged result power failure , T/R failure IR Control 1╨б Data error of D240 result software abnormal, D240 should be replaced with N250 , D211 together anytime D220 damaged or unsoldered result power failure Z550 Receive Transmi t Combine r Battery Temperature Detect Tip Battery(-) Tip Volume UP/DOWN Keys Abnormal D2II or chip select signal result power failure Can easily be damaged or unsoldered by seriously shock cause low sensitivity Connect to ground with 4.7K resistor when using external power source Abnormal Vsyn2 or N620 result failing to search network 232MHz 2nd Local OSC Test Point TXC-TXP/TXQP-TXIPTest Point Abnormal N250 result software failure Using poor quality battery often result N101 breakdown cause power failure or on-board charging failure D211 System Version Flash ROM 'тАв ╤П P i ij VI03 MIC Input Transistor VI01 damaged result failing to send voice GSM 388(398) MOBILE PHOJ It damaged result no network, power off when sending Pinl: Vcc, Pin2: Control, Pin3: Output t J RF Power Controller - TX VCO [ It damaged result difficult to search network, so failing to call It damaged result transmission failure TXVCO Power Suppl) Transistor It damaged result no network It damaged result the power supply of V450, V451,V452,may cause power failure V45I Power Supply Transistor N450 Power Supply 1╨б It damaged result no signal no network, power failure N500 IF Module It damaged result power failure V450 Power Supply Traasistor It damaged result pow er failure, no signal no network V452 Power Supply Transistor It damaged result no signal, reception failure i 6Mll z Filter It damaged result power failure V770 Power Supply Transistor It damaged result R/T no voice V760 Power Supply Transistor It damaged result ╨ж power failure It damaged result failing to identify card It damaged or unsoldered result power failure, no network, no display, no card It damaged result power failure N700 Power Supply 1╨б V705SIM Card Power Supply-
Transistor Version EEPROM - RAM Antenna Plug Bad contact result difficult to call TXBPF It damaged result transmission failure RF Switch It damaged result R/T failure A400RF Power Amp It damaged result failing to call, power off when sending Power Supply Current Limit Resistor ofA400 It damaged result transmission failure 71 MHz Filter It damaged result difficult to receive RX VCO Power Supply Transistor It damaged result difficult to receive RX VCO Pinl: control Pin2 : Power Pin3 : Output ╨║ \ N350 Frequency Synthesis 13MHz Crystal тАФ N350, RX VCO abnormal result no reception or low sensiiivny It damaged result power failure 32.768KHz Crystal It damaged result no тАв\ time display or wrong time display N800 Multi-mode Adapter It damaged r signal or low It damaged r failure, tailir It damaged or unsoldered result power failure, no network, low batten warning, power off when sending, black display screen V780 Power Supply Transistor It damaged result power failure, no network, low battery warning CPU It damaged result power failure, no network, no card, no display It damaged result R/T no voice SIM Card Socket Bad contact result failing to identify card PHONE SERVICE DIAGRAM It damaged result no signal or low sensitivity _JN200 Front-end Mixing Amp It damaged result power failure, failing to call Code EEPROM ] ╨о >ng :re d 10 he n (screen owe r L, lo w >we r no Background Light It damaged result no background light or no keypad light V6I3/V6I2/V6I 4 It damaged result abnormal display V609 Negative Voltage Regulator Bad contact result no voice to be sent. MIC Tips It damaged result тАв >n-board charge failure External Interface Buzzer P ^ damaged result no ring Backup n Battery It damaged result no time display or wrong time display Earphon e Tips Bad contact result earphone no voice N706 Backup Battery Charger It damaged result failing to charge backup battery or destroy the battery Screen Tips тАФ Bad contact result abnormal display V70I Power-on Transistor _ It damaged result abnormally power off V702 Power-on Diode It damaged result power failure Power ON/OFF Button Bad contact result difficult to power on V70(XPin5-Pin8) SIM Card Power I ^>╨ж╨а╨а>╨г It unsoldered result failing to identify card V700 Sw itch I It damaged result power failure, failing to identify card GSM STAR TAC MOBILE PHO* It damaged result no reception, no network, power off when sending U40I Antenna Switch It damaged or unsoldered result poor signal JEL451/EL452 RXFihcr 04I8,Q420 abnormal result no reception RFAMP. Transistor Q4I8 RX Mixer 0420 RXON Enable Test Point, 2.8V Pulse It damaged or unsoldered result reception difficulty St l * 4.i OSC Filler RX VCO 782-807MH* It's often damaged by serious shock, result no signal or signal too weak - I I F Filte r I-3V Controlling Voltage of RX VCO It damaged result power failure. Power Supply Transistor Q202 CR250 Varactor of I st Local OSC It damaged result no network, no signal It damaged result power failure, no network Power Supply Transistor O203 U201 IF 1╨б It damaged result 306MHz system unusable Part of 13MHz OSC It damaged result power failure CR431 Varactor of 2nd Local OSC Varactor Diode 13MHz Crystal 13MHz Test Point Cover Interface U310 PA Control 1╨б Bad contact result power failure, no voice, no ring, transmission failure It damaged result failing to search network or transmission failure Q301 PA Power Supply Switch It damaged result transmission failure SIMCardL Switch It damaged result failing to recognize SIM card RF Power Amp It damaged result no network, transmission failure, power off when sending Q330/Q33I/Q332 Supply Negative Power for PA Negative voltage abnormal result system halt when sending Electronic Switches of Power Supply Switches abnormal result power failure, on-board charge failure, no transmitting, power leakage U300 TX Mixer Vibrator Driver U101 dam* display, po It damaged time clock It damaged result pow some funci It dam; power locked send in U 703 unsc power fail network, i U 300 damaged result no transmitting or transmitting unsteai a damag unsolder _ on-board failure It damaged result no vibration Background LED Driver U501 Modem U501 damaged result T/R difficult, signal unsteady, no network R203 Varactor of 216MHz OSC Charging Switches It dama unsoldc power f ring toe Inductor J result no Bad coi on-boai failure Switches abnormal result power failure, on-board charge failure HONE SERVICE DIAGRAM ce, no тАвSUM) U101 damaged result abnormal display, power off when sending It damaged result time clock halt Real Time Crystal It damaged or unsoldered result power failure or some functions unusable It damaged result power failure, no network, locked, power off when sending nil lilure, ;n U 705 Code EEPROM for PA ial lending li 703 unsoldered result power failure, no network, no card U 703 Logic Interface t powe r failure, eafcag c nsmitting ng unstcad) ii damaged or unsoldered result on-board charge failure U10I Negative Voltage Generator QI02/QI04 damaged result abnormal display Q60l Charge Switch ration ;ed fTicult, idy, It damaged or unsoldered result power failure, ring too low U900 Power Supply 1╨б Inductor abnormal result no 5.6V voltage JStep Up Inductor U902 damaged result failing to identify SIM card Q102/QI04 Display Controller HzOSC Bad contact result on-board charge failure External Connector x>wcr lilure U902 SIM Card Power Supply Switch Buzzer Backup Battery Charge Switch Transistor U702 System Version EEPROM U 702 abnormal result power failure U704 RAM It damaged or unsoldered result power failure U801 Audio Codec I It damaged or unsoldered result power failure U806 Frequency Doubling 1╨б It damaged result U80I abnormal | U802 Volume Adjust Controller U802 damaged result voice on earphone non-tunable U803 PCM Codec J I 1 U803 damaged result T/R no voice 6V Tantalum Capacitor | It abnormal result "Check Card", ringing too low GSM 8810 MOBILE PHON It's easily be unsoldered result transmission failure Mutual Coupler RF Power Detector It damaged result earphone no voice Earphone Driver Connect To Battery(+) It damaged or unsoldered result no signal, transmission failure Signal Combiner RF Power Amp It damaged result failing to call IX BPF It damaged or unsoldered result no signal, transmission failure Front-end Mixer Amp 13MHz Signal Amp It damaged or unsoldered result reception failure or no signal 1st IF Filter It damaged result no signal, no network 1st Local OSC VCO It damaged result power failure, no network Bad contact result on board charge abnormal It damaged result power off when sending ltd The power supply is controlled by TX-ON It damaged result no network, transmission failure 13MHz signal abnormal result power failure It damaged result reception failure, low sensitivity. It damaged or unsoldered result no signal or low sensitivity It's easi result! It dam power Power Supply 1╨б On Board ╨║╤З Charge Tips N l i ┬л |' s s J4t ft* тАв . Bad contact result failing to identify card It's eas resultf no netA h's eas ) result pi It damaged result power failure or on-board charge failure It il.nih i to send Vibrator driver damaged or tips bad contact result vibrator Tips H v'brator failure )NE SERVICE DIAGRAM It damaged result no ring тАФ Buzzer It's easily be unsoldered result T/R abnormal It damaged result power failure It's easily be unsoldered result power failure, no network It's easily be unsoldered result power failure It damaged result failing to send voice PCM Module PCM Module Power Supply 1 ^* * ' * * ╨б P I RAM MIC Amp Keypad Lock Switch Speaker Tips Bad contact result earphone! speaker) no voice Screen Tips Bad contact result no display Screen Location Connector тАФ Bad contact or unsoldered result keypad failure Power Supply Switch It damaged result power failure Light, Keypad Interface It damaged result no keypad light or keypad failure 32.768KHz Crystal It damaged result time display abnormal Version ROM Data error result power failure, no network, no display, no card Code EEPROM Data error result power failure, no network MIC Tips Bad contact result failing to send voice 
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