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01-27-2010, 13:42 | #1 (permalink) |
Freak Poster Join Date: Jun 2009 Location: Nokia Solutions
Posts: 140
Member: 1062107 Status: Offline Thanks Meter: 544 | Nokia BB5,BB5+ Crystal IC Tricks and Guides 101 .By me…your, GsM_ Angel Q: What is a crystal IC? A: A Crystal IC is a small chips designed by Engineers to protect mobile phone devices, so that it cannot be damage by these this two harmful thing in Electronic circuits especially mobile phones.. I'm talking about these two elements here>> Here's what I'm talking about.... Electromagnetic interference (or EMI, also called radio frequency interference or RFI) is a disturbance that affects an electrical circuit due to either electromagnetic conduction or electromagnetic radiation emitted from an external source. [1] The disturbance may interrupt, obstruct, or otherwise degrade or limit the effective performance of the circuit. The source may be any object, artificial or natural, that carries rapidly changing electrical currents, such as an electrical circuit, the Sun or the Northern Lights. EMI can be intentionally used for radio jamming, as in some forms of electronic warfare, or can occur unintentionally, as a result of spurious emissions for example through intermodulation products, and the like. It frequently affects the reception of AM radio in urban areas. It can also affect cell phone, FM radio and television reception, although to a lesser extent. Electrostatic discharge (ESD) is the sudden and momentary electric current that flows between two objects at different electrical potentials caused by direct contact or induced by an electrostatic field. [1] The term is usually used in the electronics and other industries to describe momentary unwanted currents that may cause damage to electronic equipment. ESD is a serious issue in solid state electronics, such as integrated circuits. Integrated circuits are made from semiconductor materials such as silicon and insulating materials such as silicon dioxide. Either of these materials can suffer permanent damage when subjected to high voltages, as a result there are now a number of antistatic devices that help prevent static build up. (quote in wikipidia) Here's an Example picture of this tiny Chips... this tiny chips were most commonly damaged in terms of... a. display problems b. keypad problems c. microphone / audio problem d. sim-card problem e. memory card problem advisory some languges used in the images were Tagalog (Philippines Language) please be advice just please use google translator if something bothers you or just PM or YM me here: [email protected] Now here's where it is being used in Nokia circuit... and here the lists of all Nokia BB5 used this in a circuits... EMI FILTERS ON NOKIA BB5 PHONES EMI / ESD FILTERS 3110c EMIF01-SMIC01F2 EMIF03-SIM02F3 EMIF04-MMC02F2 EMIF07-LCD02F3 EMIF10-LCD02F3 3250 EMIF03-SIM02F2 EMIF04-MMC02F2 EMIF10-COM01F2 3500c EMIF01-SMIC01F2 EMIF03-SIM02F3 EMIF04-MMC02F2 EMIF07-LCD02F3 EMIF10-LCD02F3 5220XM 5300/5200 EMIF01-SMIC01F2 EMIF03-SIM02F2 EMIF04-MMC02F2 EMIF10-COM01F2 5310X EMIF06-SD02F3 EMIF07-LCD02F3 5320 5500 EMIF01-SMIC01F2 EMIF03-SIM02F2 EMIF04-MMC02F2 EMIF10-COM01F2 5610 EMIF02-MIC02F3 EMIF03-SIM02F2 EMIF06-HMC01F2 EMIF10-LCD02F3 6085 EMIF03-SIM02F2 6125 EMIF03-SIM02F2 6131 EMIF03-SIM02F2 EMIF04-MMC02F2 EMIF10-COM01F2 6233 EMIF03-SIM02F2 EMIF04-MMC02F2 EMIF10-COM01F2 6270 EMIF03-SIM02F2 EMIF04-MMC02F2 EMIF10-COM01F2 6280/6288 EMIF03-SIM02F2 EMIF04-MMC02F2 EMIF10-COM01F2 6300 EMIF10-LCD02F3 6500s EMIF06-HMC01F2 EMIF10-LCD02F3 6630 EMIF03-SIM02F2 EMIF04-MMC02F2 EMIF10-COM01F2 6680 EMIF03-SIM02F2 EMIF10-COM01F2 7370 EMIF03-SIM02F2 EMIF10-COM01F2 7373 EMIF03-SIM02F2 E50 EMIF10-COM01F2 E60 EMIF01-SMIC01F2 EMIF03-SIM02F2 EMIF10-1K010F2 EMIF10-COM01F2 N70 EMIF01-SMIC01F2 EMIF02-MIC02F2 EMIF03-SIM01F2 EMIF04-MMC02F2 EMIF10-COM01F2 N73 EMIF06-HMC01F2 EMIF10-COM01F2 N76 EMIF02-USB01F2 EMIF10-LCD02F3 N78 EMIF07-LCD02F3 N80 EMIF10-COM01F2 N82 EMIF02-USB01F2 EMIF10-COM01F2 N91 N93 EMIF02-USB02F2 N95 EMIF09-SD01F3 |
The Following 17 Users Say Thank You to =GsM_Angel= For This Useful Post: |
01-27-2010, 13:56 | #2 (permalink) |
Freak Poster Join Date: Jun 2009 Location: Nokia Solutions
Posts: 140
Member: 1062107 Status: Offline Thanks Meter: 544 | Now, Lets explore them one by one... EMIF01-SMIC01 - used in bb5 phones that also uses RETU 3.02 Power IC like N70 and etc. I’m talking about this IC below. here's the bump configuration... This is how it works: * when making a call, a voltage or current from RETU IC terminal H1 will draw the line of R2101(resistor) to IC terminal A2 to supply the microphone’s b+ terminal. * once the supply voltage is entered, the microphone is now on active state., once in active state. The microphone reacts into a high fidelity level, in short, meaning, it’s sensitive to catch audible sounds. But, this circuit was designed to enduced noise * when a sounds is catch up, the microphone now then feeds back the audible sounds to RETU IC terminal K1(+) and J3 (-) to amplify it and feed to RF during transmission. * it works like a mic pre-amp(pre-amplifier) A microphone preamp is a preamplifier used to amplify a microphone's low output voltage to a stronger, more usable level. A microphone preamp must provide stable gain for small signals without being sensitive to induced noise from cabling and without distorting large amplitude signals.Most microphones must be used in conjunction with a microphone preamp to function properly. Q: can we check this IC if suspected went wrong or damaged? A: Yes. If you're that so keen... like me.. Follow the procedures below: 1.1. Remove the IC . Set your Multitester to X1k, connect the probe sa A2 at C3. here you are about to check the voltage supply line to the positive of MIC terminal. Normal reading in this area is 2.3k (+/-). Without reading here, the IC is open or faulty… 2. connect the probe sa B1 at C3, normal resistance reading here is 2.2k (+/-) Without reading here the IC is open or faulty. 3. connect the probe sa C1 at C3, normal resistance reading here is 4.5k (+/-). Without reading here the IC is open or faulty. 4. now, set the multitester to X1 and check the grounding terminals from B2,B3 and C2 to terminal A2 B+ line B1 at C3. there should be no reading happens here, if there is. it indicates the IC is shorted or busted... Modifying or Jumper Techniques if you have no replacement available... |
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01-28-2010, 14:28 | #7 (permalink) |
Freak Poster Join Date: Jun 2009 Location: Nokia Solutions
Posts: 140
Member: 1062107 Status: Offline Thanks Meter: 544 | BGF100 - EMI MIC FILTER IC BGF100-(EMI FILTER) Mic IC - Used in most BB5 phone that also used RETU 3.02 Audio / UI IC’s..this kind of IC was designed with differential microphone filter. This one works same as EMIF01-SMIC01. but this one designed as a differential-meaning both positive at negative lines of the microphone were both filtered. the negative side of the microphone is not directly connected to ground… . see picture below: Here is an example of BGF100 in NOKIA BB5 mic internal cicuit.. BGF100 in Mic Internal Circuit.. Now, here how it works, when making a call a voltage / current will draw the line of R211 to supply the Vcc (B+ terminal) A2 of the said IC to turn the microphone into active state. Once in active state the phone is now on capable of catching sounds and then feed it to the lines of B4 to B1, C4 to C1 and then send to C2100 and C2101 to purify the audio signal and send to RETU IC to amplify during transmission. BGF100 in Mic External Circuit When plugging an external headset the terminal or bump A4 Will react and send small signal to RETU to release the voltage/current of 2.1V to supply the IC. And then the voltage / current will draw the line of R211 to supply the Vcc (B+ terminal) A2 of the said IC to turn the microphone into active state. Once in active state the phone is now on capable of catching sounds and then feed it to the lines of B4 to B1, C4 to C1 and then send to C2100 and C2101 to purify the audio signal and send to RETU IC to amplify during transmission. |
The Following 5 Users Say Thank You to =GsM_Angel= For This Useful Post: |
01-28-2010, 14:48 | #8 (permalink) |
Freak Poster Join Date: Jun 2009 Location: Nokia Solutions
Posts: 140
Member: 1062107 Status: Offline Thanks Meter: 544 | BGF100 – EMI FILTER CHECKING PROCEDURE On Board without removing the Chip…. Always locate and remember on its other connecting parts because that is our test points spots, like a… * RESISTOR Vcc Lline * Filter Capacitors * Filter Coils * MIc Terminal Pads / Ext. Connector 1.Set Multitester to X1K. and connect the test probe to RESISTOR Vcc line and the other probe to the Mic (+) Terminal Pads.. If you get Readings here it means the line is okay. Just add the connecting resistor’s resistance value in the line you are going to check. if no reading the said line was already busterd 2.Multitester to X1K pa rin , connect the test probe to the filter capacitors and to the Mic Pads terminals in alternate ways. Positive to positive then negative to negative there should be reading here... 3. Check both lines to the grounds if walang shorted.. MUltitester set is X1 do it in forward and reverse manner… Checking the IC ITSELF. 1. set Multitester to X1k. check the Bumps of A2 to B4,C4,B1 and C1.. you should get normal readings here. If nothing it means its busted already. 2. input to output checking…. Get readings here. If no response the line is busted.. 3. Vcc to Ground checking. In forward and reverse order.. Multitester to X1.. check it if shorted… From A2 to A3,B2,B3,C3.C2 4. MEAS checking. From B1 to A4 for external circuit faulty only BGF 100 Modification and jumper guide |
01-28-2010, 15:03 | #9 (permalink) |
Freak Poster Join Date: Jun 2009 Location: Nokia Solutions
Posts: 140
Member: 1062107 Status: Offline Thanks Meter: 544 | EMIF02-MIC02F2 and EMIF02-MIC02F3 This kind of EMI FILTER IC where used in keypads and volume control circuits.. here are some examples of this IC in a circuits.. The bumps layouts Check-up procedures.. Ways on how to modify or Jumper |
The Following User Says Thank You to =GsM_Angel= For This Useful Post: |
01-28-2010, 15:46 | #10 (permalink) |
Freak Poster Join Date: Jun 2009 Location: Nokia Solutions
Posts: 140
Member: 1062107 Status: Offline Thanks Meter: 544 | EMIF02-USB01F2- this IC's were used in most BB5,BB5+ phones with USB(universal serial bus) input connections like, N76,N82,N96 and other units that has a USB interface.. this is used to protect the lines of the circuit from ESD and EMI hazards.. Here's an example of this IC in the circuits.. Ways on How to trace the circuit lines and the IC itself.. With an aide of a schematic diagrams as your guide, you can check on its every lines in the circuits.. EMIF02-USB01F2 – CHECK UP PROCEDURE AND MODIFICATION |
The Following 4 Users Say Thank You to =GsM_Angel= For This Useful Post: |
02-05-2010, 15:54 | #13 (permalink) |
Freak Poster Join Date: Jun 2009 Location: Nokia Solutions
Posts: 140
Member: 1062107 Status: Offline Thanks Meter: 544 | EMIF03-SIM01F2 EMIF03-SIM02F2 EMIF03-SIM02F3 - Most Nokia phones uses this IC for SIM Card EMI filtering and ESD protection, Simcard related problems in-countered here if this IC is faulty. here's an example of this IC in N70 sim circuit. Check-up procedures Tricks to Modify or Jumper |
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02-05-2010, 15:59 | #14 (permalink) |
Freak Poster Join Date: Jun 2009 Location: Nokia Solutions
Posts: 140
Member: 1062107 Status: Offline Thanks Meter: 544 | EMIF04-MMC01F2, used in multimedia card for mobile phones also used in digital camera, MP3 players and etc. where EMI filtering in ESD sensitive device is required.. EMIF04-MMC01F2 INTERNAL DIAGRAM EMIF04-MMC02F2 in a circuit samples CHECK UP PROCEDURES, just follow the picture below and check each and every value resistance.. |
02-05-2010, 16:08 | #15 (permalink) |
Freak Poster Join Date: Jun 2009 Location: Nokia Solutions
Posts: 140
Member: 1062107 Status: Offline Thanks Meter: 544 | EMIF06-HMC01F2 A 6 line EMI Filter used in BB5 phones with highspeed multimedia card or circuits.. Here's an example of EMIF06-HMC01F2 in N73 circuit.. Check-up Procedures |
The Following 3 Users Say Thank You to =GsM_Angel= For This Useful Post: |
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