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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Nokia > Nokia Hardware & Hardware Repair

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.

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Old 01-06-2003, 15:12   #1 (permalink)
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5110 no comunication on MBus


I have an working 5110 BUT... is no comunication with any tool.
I want to unlock it but all tools show " Phone not conected"
I use MBus comunication

Cable is ok
conector is clean
Pcb is almost new

Maybe someone had this problem and solved it
Please tell me if you had this problem and how you solved.

BR
Rak|m
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Old 01-07-2003, 09:52   #2 (permalink)
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I still have this problem

BUT
For flashing it works well
I can read flash and write flash in phone as well

but I cannot comunicate on Mbus

Anyone??

Rak|m
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Old 01-07-2003, 11:20   #3 (permalink)
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If Mbus is not ok, your flashing process won't start !
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Old 01-07-2003, 12:28   #4 (permalink)
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realy santo is problem on Mbus

I can flash phone
I can read
I can write
But with MBus wont comunicate

I writed in phone many flashes
I put original flash in phone BUT.... Now contrast is very low
and is locked on all simcards
was working in Orange network
Now not accept this card anymore
I know this is weird
But is like I said

I am pissed off by this ****ing 5110
Is first time when an 5110 not comunicate on Mbus
I use Mbus interface
I used to use FBus interface but now I disasembled it because I use Mbus
Maybe Will comunicate on FBus????
I do not know yet
I cannot try because I have not an interface on fbus

So I must replace pcb until I will find an solution for this

10x a lot for understanding

BR
Rak|m
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Old 01-07-2003, 12:42   #5 (permalink)
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Try to look inside, maybe there is PIC inside the phone ! I usualy get this problem, with this old unlocking method ! Remove it from there !
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Old 01-07-2003, 13:01   #6 (permalink)
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No is not
I disasembled phone from first time
I reheated
I folowed all circuits on service manual
all ok but still problem

Rak|m
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Old 01-07-2003, 13:05   #7 (permalink)
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Is your mbus cable ok ? Try it on another 5110.
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Old 01-07-2003, 13:08   #8 (permalink)
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I tried 5


and also 6150
I mean all 6 ok this one no

Still no luck

Rak|m
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Old 01-07-2003, 13:16   #9 (permalink)
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@ Raklm
try to Connect the Phone using Logomanager or Oxygen Phone Manage.. (using Mbus cable)
im Sure ur Phone will be connected without any Problems..
just let me know the results .. coz i face some thing like this b4 with 6210.

BR
AboAli
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Old 01-07-2003, 13:21   #10 (permalink)
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Try replace R113 and V101
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Old 01-07-2003, 13:23   #11 (permalink)
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Also check double resistor R203
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Old 01-07-2003, 19:58   #12 (permalink)
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Hi

Check V101 and then R113 & C112 and MBUS pins on MAD D200

B.R

M@RTY

Last edited by M@RTY; 01-07-2003 at 20:09.
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Old 01-08-2003, 10:20   #13 (permalink)
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I have an other pcb from 5110 and for test I removed V101 and this 5110 comunicate on MBus
Weird no?

I also changed V101 , R113, C112, R203 from one good pcb , still this problem
I cheched all wires all ok but still no comunication on Mbus

Flashing works well

This is version 05.04 rom4
I found this version throght readind flash and put in ppm manager
BR
Rak|m
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Old 01-08-2003, 17:09   #14 (permalink)
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I had a problem like that today; wanted to unlock the phone but it won't connect on mbus and couldn't also connect on fbus whith logo manager : I use NU2000 nokia unlocker and the phone was successfuly unlock (flash partial unlock).

Try it and goodluck.
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Old 01-08-2003, 18:48   #15 (permalink)
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@ Raklm
put battery, and power on that phone ,
and use multi tester to measure that MBUS is "high 2.75v or "low 0v"
if it is low 0V , then check CCONT VBB pull high at MBUS !

Willy
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