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Bad H-drive on Compaq V70 model 621

November 2 2005 at 4:01 AM
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  (Login DDTech)

The picture width on my monitor is only 2-3 inches wide.

Found some schematics, but not the correct one. Is this a Samsung Syncmaster 700P+ ???

The number CGL7777 are marked on the heat sink

700P+ schematic are close, but reference numbers are different.

All voltages from supply are OK

Voltage on H-drive transistor Q404 (MJW16212) colletor is only 300-volt peak, instead of 1200-volt.

Any idea?

 
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Richard B
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Re: Bad H-drive on Compaq V70 model 621

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November 2 2005, 4:39 AM 

Check your mail.

Rich

 
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(Login DDTech)

Re: Bad H-drive on Compaq V70 model 621

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November 2 2005, 9:23 AM 

Thanks Rich

This schematic is not 100% correct for my monitor.
H-drive transistor is referenced Q407 (MJL16218) on the schematic, on the PCB it is Q404 (MJW16212).
I found that there are different types of Compaq V70, mine is a model 621. Is there any other way to determine the exact model/type? FCC-ID #? DDC#? Softjig?
I have found a complete Samsung Syncmaster 700P+ service manual on the web. Same schematic as the one you sent me. This model has more keys on the front than mine.
Any idea on which model mine is?


 
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Richard B
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Re: Bad H-drive on Compaq V70 model 621

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November 2 2005, 7:31 PM 

Hi try the samsung 550B or 750S these are the same schematic but with different values also HOT is Q404.

Rich

 
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