|
Welcome to the GSM-Forum forums. You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. Only registered members may post questions, contact other members or search our database of over 8 million posts. Registration is fast, simple and absolutely free so please - Click to REGISTER! If you have any problems with the registration process or your account login, please contact contact us . |
|
Register | FAQ | Donate | Forum Rules | Root any Device | ★iPhone Unlock★ | ★ Direct Codes ★ | Direct Unlock Source | Search | Today's Posts | Mark Forums Read |
Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section. |
| LinkBack | Thread Tools | Display Modes |
01-08-2006, 12:18 | #1 (permalink) |
Freak Poster Join Date: Apr 2002 Location: United Kingdom, Yorkshire Age: 43
Posts: 103
Member: 11348 Status: Offline Thanks Meter: 3 | Problem with 6230i noise and scratch |
01-10-2006, 16:41 | #7 (permalink) |
No Life Poster Join Date: Feb 2004 Age: 52
Posts: 593
Member: 54993 Status: Offline Thanks Meter: 47 | If you have made a jumper for the buzzer or anything which passes above the RF circuitery then Reroute it ( route it parallal with the ground lines ) and use good shielded wire. Also put frame shields on their place. |
01-10-2006, 17:45 | #10 (permalink) |
No Life Poster Join Date: Nov 2001 Location: England Age: 41
Posts: 2,821
Member: 7653 Status: Offline Thanks Meter: 823 | sorry my friend, but please look at the attached schematic of nokia 6230 audio lines... there is no "crystal ic" (which we call resistor packages...) in the lines. the crystal effect package usually contain 3 or more resistors... you will see R150/R157/R162/R169/R170 are packages containing two resistor in each, none of these are appear "crystal". you can look on board and see this, they are like normal SMD resistors, but square instead of rectangle... when you look to the schematic, you will now see that there is no point at all that the earpiece and external earpiece are linked. other than at UEM. so if you are having problem in both component, then any one with logical thinking can say uem is the problem... also, after i have seen maybe 20 piece 6230 saying "insert sim", i have came to conclusion that "reflow the crystal ic" does nothing. only replace or bridging those components will help... see attached, br Last edited by Dave.W; 10-10-2007 at 10:15. |
01-11-2006, 01:31 | #11 (permalink) | |
Freak Poster Join Date: Dec 2005 Age: 44
Posts: 277
Member: 214350 Status: Offline Thanks Meter: 17 | Quote:
-because audio circuits depends on signals not current as logic they use decoupling capasitors to the I/O terminals , if any of the input cap has cracking , falieur ,or even dirty across its pins it gives "Scratching " . -surge of the DC power or any problem with the power feed , or DC smoothing gives ( audible spikes ) , thats why " Dave " see that it is the UEM . -Faulty PCBs gives the same ( audible spickes ) , when PCB trackes looses insulation betwwen +ve and -Ve lines due to prolonged heating ( under PA , Light divers and other devices causing heat ). it was common in 3310 faulty PCB with Lights and soundes . | |
01-11-2006, 10:34 | #12 (permalink) | |
No Life Poster Join Date: Nov 2001 Location: England Age: 41
Posts: 2,821
Member: 7653 Status: Offline Thanks Meter: 823 | Quote:
i dunno how that works, as inductor does not block the DC like a capacitor does... any case, to fault find this correct, you really need a good oscilloscope | |
01-11-2006, 19:38 | #13 (permalink) | |
Freak Poster Join Date: Dec 2005 Age: 44
Posts: 277
Member: 214350 Status: Offline Thanks Meter: 17 | Quote:
also shouck coils used at the Cars motors as an RF ( radio filters ) devices to reduce the RF harmony of the motor from feeding to the radio . | |
01-12-2006, 07:00 | #15 (permalink) |
Freak Poster Join Date: Jan 2006 Location: mars under soft & hardware....
Posts: 237
Member: 217604 Status: Offline Thanks Meter: 12 | make sure your phone is clean,try too check the uem if its not sealed all around,then it will be having some rust inside.aply flex and rehot it.flex can help you to clean it. regards |
Bookmarks |
Thread Tools | |
Display Modes | |
| |
Similar Threads | ||||
thread | Thread Starter | Forum | Replies | Last Post |
problem with 6230i and mmc | waleedy | Nokia Digital Core Technology 4 ( DCT-4 ) | 6 | 02-19-2008 06:14 |
Problem with 6230i, need advice | Trier | Nokia Digital Core Technology 4 ( DCT-4 ) | 7 | 07-09-2006 13:42 |
Problem with 6230i Flashing useing UFS3 1.3L | alianu | UFS2 + UFS3-Tornadoflasher | 0 | 09-09-2005 19:31 |
|