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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 04-20-2009, 20:19   #1 (permalink)
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Ichal_spy Hardware Analisys here

I have Training Centre here In Indonesia...

ill upload some analysis of hardware problem that we success finishing here....


br

Borneoflasher Training and Service Centre Indonesia.....


ichal_spy
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Old 04-20-2009, 20:30   #2 (permalink)
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KEypad and Display Light failure anaylisi and solution


i receive nokia 6300 no light at display and keypad....

Steps :
1. check vbat at L2304 = normal
2. check Pwm pin from tahvo ic at j2316= normal 1.8v
3. check vled out from Light ic = normal
Summary Light Ic dan tahvo Ic is normal




Next Step :

chek out put from n2401 at test point j2428 there is no voltage... normally... its must be 18volt

Analysis : Failure at ic n2401

Then i check the way at n2401... i find that there is between L2403 to N2401 is not conneted....



solusition : Jumper L2403 to pin 4 at N2401


result :

Display ligh is normal .. But keypad light still not normal

B]Next Step:[/B]
cek output at r2408 = 18v
Check out put at r2418 = no voltage...nomally it must be 15volt

COLOR="Blue"]Analysis :[/COLOR] Failure at v2401

solusi : because i dont have this componenet (v2401)

i make a trik with make a jumper from r2408 to r2419






Result... :
Keypad light is normal ... and Display Light is normal too




ichal_spy



sorry because the pict in Indonesian....
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Old 04-20-2009, 20:35   #3 (permalink)
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special man in hardware. we need some one like you here in rwanda
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Old 04-21-2009, 10:55   #4 (permalink)
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superb post with good explaination , we want people like you in this forum
hats off to you
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Old 05-05-2009, 22:39   #5 (permalink)
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6680 BT Error

I found Nokia 6680 error at Bluetooth... (Operation failed)



Measurement :

Check Vio at c6035 = 1.8v normal
Check Vregout At C6036 = 0 (It should be 2.8v)




Analisis....

Vregout Regulator (N6031) is damaged....


Step.... Make Jumper between Vaux (C1470) 2.8v to Vregout C6036





Result......




Br

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Old 05-05-2009, 22:56   #6 (permalink)
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good work ichal u're istimewa man
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Old 05-06-2009, 05:30   #7 (permalink)
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istimewa...kekekeke...
great job..keep posting brother...
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Old 05-06-2009, 05:35   #8 (permalink)
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really good work my dear fren,,,u are the best,,,,and hard worker,,,,,,,,,,

regards
gsmshare
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Old 05-06-2009, 05:49   #9 (permalink)
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hello ichal, how much should I pay for the practice directly to the place you in Indonesian? i m from LA hollywood! heheheheh
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Old 05-06-2009, 05:55   #10 (permalink)
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good job bro ichal
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Old 05-06-2009, 05:57   #11 (permalink)
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Case Nokia 6630 Signal Problem....

Object :




Step :
Searching manual on phone at setting, Network...... Manually...

REsult : No Operator Found

So in this case the problem is at RX Part or Receiver

Measurement step....

1. Check Rx i/q di J7508, J7509, J7510, J7511..... Not Good datas... so the problem is around RF Ic not rap problem.. cause the data come from rf ic to Rap..
2. Check Control Vco at pin out cp at rf ic... Result is Noise.. so the problem is at CP Out line (Control VCO).. at BB5 phone the problem is always damaged at capasiror 2n2.. so i change it...


after change.. i check again and its not noise anymore....

after that i search manually the network again.. result.. all operator is found...
but after selec an operator its cant acces.. its show NO Accest at display...

so problem now is at TX (Transmitter).. RX Problem is solved....


Next step....

Check Control VCO for TX at cp out line at Vinku result.... No line...
its mean VCO for Vinku not working....

Next step....
Check VCO Coltage at c7555... No Voltage... its must be 2.8v
Check vreg2 at C7548 No Voltage too its must be 2.8v too cause its be at same way with vco voltage...
Check way between c7555 and cc7548 result the way is OK...

Summary.....
Damaged is at VCO Voltage.. its not be 2.8volt.....

Solution....
Find another voltage... example Vreg1 with same value....

Make jumper betweenVreg1 (C7543) yo Vreg2 (C7548)...




after make jumper I check control VCO is ok... and not noise....



Turn on the phone.. and the result is....





Best Regards...


ichal_spy
Borneoflasher Training Centre
Indonesia
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Old 05-06-2009, 06:10   #12 (permalink)
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Go..go mr.ichal...

Waiting the next anylisys..
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Old 05-06-2009, 06:42   #13 (permalink)
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good job ichal...we always support you ......
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Old 05-08-2009, 17:13   #14 (permalink)
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3100 No Signal analisis....

Step :

Searching Manual no operator found...

so the problem is at RX part (Receiver)

step....
Check Rx i/q at J611,J612,J613 dan J614.. thya

the data is like this..





so.. RF part is ok,,,,
and we dont have to check RF Voltage, RF Bus, RF CLock etc... its must be OK cause rx i/q is ok.....

Summary....
the problem is on PM or UEM

next step.... Write good pm ... result... Same..

next step

reball UEM...

and the result is...

[IMG][/IMG]


br
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Old 05-08-2009, 17:32   #15 (permalink)
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here the result....

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