need help to repair pg R9.0.5 - diyAudio
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Old 19th April 2008, 03:08 AM   #1
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Default need help to repair pg R9.0.5

just found this forum so big noob here. my amp only has sound through the hi channel but none through the bass. i did burned the amp couple months ago and try to repair it. i had my cousin replace some of the resistors and transistors that were brunt r cracked, but it still didnt work. i did search through the forum but didnt find nebody with the same problem. if u guys need me to post pictures i will, but the amp is still mount in my car. dont feel like taking it apart.
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Old 19th April 2008, 03:34 AM   #2
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without knowing what parts you have replaced any one here capable of helping you will be at a loss as to where to start. The amp will have to come out to be repaired anyway, Just something to think about
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Old 20th April 2008, 03:52 AM   #3
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the transitors i brought from digikey is FQP50N06
the resistors are .25 watts carbon film
i circled the ones i replaced
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Old 20th April 2008, 03:52 AM   #4
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broken link my bad
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Old 20th April 2008, 04:12 AM   #5
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damn how u post pic?
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Old 20th April 2008, 04:14 AM   #6
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None of your links are working it seems, But I can tell you by the part number you replaced the power supply Fets, and there gate resistors.

This is a symptom repair you performed, I am fairly sure the sub channel is toast also. bass channel power supply's don't usually fail by themselves. They usually fail after the sub outputs are shorted.

So there was more wrong then was openly visible. PG lists a flat repair rate of $150.00 for this amp if your in the USA. The outputs are TIP-35 and TIP-36, you should check these out for shorted condition before trying to repair the power supply.

See if you can get your links to work, so I might see your previous work....
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Old 20th April 2008, 04:20 AM   #7
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Quote:
Originally posted by xxxwhezzy
damn how u post pic?
I have fixed your links... you need to use the img tags -- html won't work

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Old 20th April 2008, 04:41 AM   #8
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OK lets get started...

Q9 thru Q16 are the four channel power supply mosfets. Your repair looks ro have worked to get the amp back running, but you said there were bad channels, could you give me more info like Rear channels maybe ?

If this is correct you must ohm out the outputs for the bad channels....LMK...Please tell me the Q numbers by the devices you replaced, so I can locate which power supply you repaired??? THX
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Old 20th April 2008, 05:20 AM   #9
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the 4 channel never went out only the sub channel. i'm reading through the wiki right now to see what u mean by the Q numbers, im not a electrician r nething so bare with me. if the repair cost $150 then its not really worth it because i only got the amp for 125 new
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Old 20th April 2008, 05:21 AM   #10
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one more thing i did ran an 8 ohm sub to the sub channels n it started smoking, but i had another pg amp with the same setup and it never burned. well i replaced q16, q28, q29, q30, and q31.
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