Hello all,

as you all know that there are some reasons related to PCB which cause clicking noise , i face this problems with WD PCB (L Shaped) with (smooth Ic 1.3) so i'll report these reasons here in order of their Importance:

1- Resistor (R 120) is damaged (the most important reason) - the right value of this resitor is (1.2 ohm) - you can replace the damaged one by another good one from a donor PCB - you may notice that this resistor is present in many WD PCBs.

2- one of the small capacitors is removed -the removal of the small capacitors may occured while soldering - not in purpose - ... so becareful
(good inspection of the PCB with magnifying glass or even with naked eye will detect the removal of the capacitor) - then you can replace the removed capacitor from a donor PCB.

3-firmware microchip is damaged ( it's rarely occured)

i will support this topic by image as soon as possible

any question ..any suggestion ... any criticism .... u all r welcome

Ahmed_Samy

_________________
Ahmed Samy
Al-Ahram for computer services
http://www.alahram-group.com

good share .

Thanks Rameez

_________________
Ahmed Samy
Al-Ahram for computer services
http://www.alahram-group.com

Hi Ahmed,

Thanks for the info.
May i just point out that R120 is 0.12 ohms and not 1.2 ohms.
Small but significant difference

Dobre

_________________
Murphy was an optimist

Datarecovery in Belgium, Holland, France and Germany
Datarecoverytools http://www.drtools.eu

thanks Dobre for correcting my mistake , i'm really sorry

_________________
Ahmed Samy
Al-Ahram for computer services
http://www.alahram-group.com

sorry all for my mistake

the right value of R120 is 0.12 ohms (not 1.2 ohms)

_________________
Ahmed Samy
Al-Ahram for computer services
http://www.alahram-group.com

hi ahmed
i think you are egyptian too nice info. i read
hope to talk u my email is tawfeek1979@yahoo.com
regards
tawfeek
Ahmed_Samy,

_________________
Tawfeek Mokhtar
http://alsafwapc.net
Alsafwa Data Recovery Egypt