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rameez
 Post subject: 4D clicking
PostPosted: April 10th, 2007, 15:58 
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Joined: June 27th, 2006, 11:33
Posts: 2288
Location: In ur HDD !
I have a problem with a PCB of 4d040h2 when i plug that pcb to any drive it starts clicking and after i remove that pcb and plug a completly functional one
it start working fine . I want to know what could be the problem with the PCB .
Below i am attaching a picture of a 4d040h2 pcb please tell me which componenet could cause such a problem . So i can replace it .



Image


Thanks in advance .
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hddlab
 Post subject:
PostPosted: April 10th, 2007, 23:21 
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Joined: September 16th, 2006, 8:51
Posts: 141
Location: Vietnam
Did you try to replace of IC SH6770C, that is the power cotrol?
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rameez
 Post subject:
PostPosted: April 11th, 2007, 16:18 
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Joined: June 27th, 2006, 11:33
Posts: 2288
Location: In ur HDD !
i will try it thanks . Could there be problem in the Agere m5453 thats the spindle controller chip ?
correct me if i am wrong.

thanks
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pepe
 Post subject:
PostPosted: April 12th, 2007, 11:41 
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Joined: October 3rd, 2005, 0:40
Posts: 4753
Location: Hungary
Hi,

U are wrong :)
the agere IC is the reading/writing channel.
U should check the -5V power line if the drive is clicking with only this PCB.
I think somebody in DR businnes should have at least basic electronic education to recognize the parts, engineer level is recommended...

regards,
pepe
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rameez
 Post subject:
PostPosted: April 12th, 2007, 14:05 
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Joined: June 27th, 2006, 11:33
Posts: 2288
Location: In ur HDD !
thanku for ur reply if there is problem with the 5V power line then i should chek the DC-DC convertor .
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pepe
 Post subject:
PostPosted: April 12th, 2007, 14:52 
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Joined: October 3rd, 2005, 0:40
Posts: 4753
Location: Hungary
:idea:
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rameez
 Post subject:
PostPosted: April 12th, 2007, 15:53 
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Joined: June 27th, 2006, 11:33
Posts: 2288
Location: In ur HDD !
What?
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pepe
 Post subject:
PostPosted: April 13th, 2007, 15:09 
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Joined: October 3rd, 2005, 0:40
Posts: 4753
Location: Hungary
I mean yes, check the converter wether it produces a stable -5V for the preamp!

regards,
pepe
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hddking
 Post subject:
PostPosted: May 6th, 2007, 15:03 
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Joined: April 27th, 2007, 4:07
Posts: 32
normally from this IC SH6770C hdd click specially 4d0 .
PLS check from other pcb number B9FDA or B9FDB

firmware cod : DAHO17K0
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