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Old 18th June 2004, 03:14 PM   #11
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hahax...then I guess you really have to go inside...
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Old 18th June 2004, 04:55 PM   #12
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well just opened it up, it contains :
Pioneer Mosfet, Pal006A - B225C0103 (think it`s the amp)
Pioneer PE524 - 78493 - 0106KX
Pioneer PM4009A - 0043K3012

and a circuit which is in a sort of metal casing, think that`s for the tuner part.

I can`t find a datasheet about the mosfet, am still searching for the other 2 chips
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Old 20th June 2004, 12:16 AM   #13
sss is offline sss  Israel
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it looks like there's a mosfet amp , not a chip amp
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Old 21st June 2004, 10:36 AM   #14
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I just did it . I wrecked the tuner part, there was a extra print soldered with wires to the main print and two wires were named LCH and RCH. I cut these wires and i listened to the radio, no sound. So i soldered some plugs on it and a DPTP switch and now i can switch between tuner and a AUX source

There`s only one problem, it works perfect as long as the source doesn`t draw the power from the car battery, then i get a LOT of noise. I connected the ground wire from the source signal to the source ground -> no succes, also connecting the ground from source power to radio power doesn`t work

Does anyone have a solution, i only didn`t try the ground loop isolator which i should have somewere lying around, gonna try that one tonight. In the meantime feel free to post a possible solution
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Old 21st June 2004, 11:06 AM   #15
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yeah I do...it's sorta "bad practice" just cut the ground going into the RCA input...meaning from ur source...just connect the signal to the in of ur modified headamp...forget about the ground for now...test and see if it helps...
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Old 23rd June 2004, 08:33 AM   #16
djQUAN is offline djQUAN  Philippines
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the ground loop isolator works 100% of the time in my case. haven't seen a reason it won't work. although depending on the internal signal transformer of the isolator, you will get some slight signal degradation (frequency response).
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Old 24th June 2004, 02:24 PM   #17
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will try disconnecting the rca ground to see if that helps, thnx for the help
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Old 24th June 2004, 09:10 PM   #18
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disconnected ground from RCA, only noise from the HD remains
this is tested with the ground loop isolator, ground for power is connected directly to the ground for the HU
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Old 19th July 2004, 08:01 AM   #19
david90 is offline david90  United States
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did u figured it out? I like the idea of the project.
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