Pic chip in orion 275R

Samuel Rock · 15th February 2009, 02:43 AM

i had some one bring me an ORION 275R today.. said it has engine noise.

so i hooked it up on the bench and it had poping noise comming from both channels.. after a bit of testing i started to think i was hearing the 1mhz from the crystal.. to make a long story shot i ended up pulling the pic chip from my working 275G4 and putting in the 275R and the noise went away.. just for giggles i put the 275R chip in my 275G4 and it also made the poping sound from the outputs...

Has any one ever tried to copy the PIC16C71 chips from the ORION amps. I have a programmer i need to check to see if it will do pic chips.. But would like some input if you have done this before..

Thanks
Sam

I Am An Idiot · 15th February 2009, 01:40 PM

I do not know if you can burn that chip, but I think they are available. Perry should be able to get you info on obtaining one.

I Am An Idiot · 16th February 2009, 12:25 AM

The chips are available, but the programming info is not. But since you have the working chip and the programmer, it seems as though you only need some new chips.

Samuel Rock · 16th February 2009, 02:08 AM

Yea i knew i could get the chips.. at one point in the past i used this same chip to make mod chips for playstation 1 so that i could play burnt games...

what i am worried about is.. some pic chips have code that will 0 the chip if it is read in a programmer.. i dont want to make my working amp a door stop by reading the pic.

i was hoping some one else had this problem at some point in time..

DigitalJunkie · 16th February 2009, 03:37 AM

IIRC there is also a type of PIC that has "fusible links" inside,that manufacturers can nuke after programming,and prevent the chip/code from being read.
Been a while since I played with PIC's,so it's kinda foggy.

MartyM · 18th February 2009, 06:13 PM

You should not have to worry about simply reading a PIC. I've never heard of (or experienced) a microcontroller failing to run after an attempted read assuming nothing else was done incorrectly.

The flash-based PICs/micros today are sometimes funny though.

That PIC is ROM only so it should be safe. However, in a commercial product it's a pretty safe bet the security bits are set and you can't retrieve the .HEX image.

It shouldn't hurt to try.

PS: why are you needing to replace the PIC?
PS2: should be pin-compatible replacement PICs available now

Samuel Rock · 18th February 2009, 06:25 PM

as i said in my first post, i need to replace it because it does not work right. it makes a poping sound when installed in the amp. i have tried swapping it into a my test unit and i get the same poping sound from my know good test unit.. if i put my known good pic from my test unit into the unit that has come in for service the noise goes away.. thus there is a problem with the pic..

i have replacement chips. just need code to load on chip.. the programmer i have will only read 3ffff from the working chip.. i have a new chip programmer on the way as i dont know if my old one is working as it should.

Sam

MartyM · 18th February 2009, 08:10 PM

Hi, sorry if I misunderstood the original post.

If your programmer/reader is working correctly, and you get "3FFF" on a read, then unfortunately it's locked and can't be read.

Perhaps you could get the .hex file from Orion? Otherwise, maybe make a "saved search" on eBay for it to email you automatically when one pops up there.

Hmm...sorry I couldn't be of more help.

Samuel Rock · 18th February 2009, 08:43 PM

yea i was thinking it was going to be locked.. bummer.. that this is a perfect working amp with a bad pic chip... as the amp will not run with out it...

Sam

Samuel Rock · 19th February 2009, 01:45 AM

Well i take back what i said about the amp not running without the pic.. it seams the amp will run but does not light up the power led.. i all the xovers work high and low.. tomorrow i will check that the bridge and phase switches work. as of right now i do not see any function of the amp loss with out the pic just the power led...

I am thinking that the pic may be for the intelli-q.

Any one have any input?

I will post what i find tomorrow, im calling lights out for tonight.

15th February 2009, 02:43 AM	#1
Samuel Rock diyAudio Member Join Date: Dec 2008	Pic chip in orion 275R i had some one bring me an ORION 275R today.. said it has engine noise. so i hooked it up on the bench and it had poping noise comming from both channels.. after a bit of testing i started to think i was hearing the 1mhz from the crystal.. to make a long story shot i ended up pulling the pic chip from my working 275G4 and putting in the 275R and the noise went away.. just for giggles i put the 275R chip in my 275G4 and it also made the poping sound from the outputs... Has any one ever tried to copy the PIC16C71 chips from the ORION amps. I have a programmer i need to check to see if it will do pic chips.. But would like some input if you have done this before.. Thanks Sam

15th February 2009, 01:40 PM	#2
I Am An Idiot diyAudio Member Join Date: Mar 2007	I do not know if you can burn that chip, but I think they are available. Perry should be able to get you info on obtaining one. __________________ If it ain't broke Don't fix it

16th February 2009, 12:25 AM	#3
I Am An Idiot diyAudio Member Join Date: Mar 2007	The chips are available, but the programming info is not. But since you have the working chip and the programmer, it seems as though you only need some new chips. __________________ If it ain't broke Don't fix it

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16th February 2009, 02:08 AM	#4
Samuel Rock diyAudio Member Join Date: Dec 2008	Yea i knew i could get the chips.. at one point in the past i used this same chip to make mod chips for playstation 1 so that i could play burnt games... what i am worried about is.. some pic chips have code that will 0 the chip if it is read in a programmer.. i dont want to make my working amp a door stop by reading the pic. i was hoping some one else had this problem at some point in time..

16th February 2009, 03:37 AM	#5
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	IIRC there is also a type of PIC that has "fusible links" inside,that manufacturers can nuke after programming,and prevent the chip/code from being read. Been a while since I played with PIC's,so it's kinda foggy.

18th February 2009, 06:13 PM	#6
MartyM diyAudio Member Join Date: Oct 2006 Location: Monroe, North Carolina, USA	You should not have to worry about simply reading a PIC. I've never heard of (or experienced) a microcontroller failing to run after an attempted read assuming nothing else was done incorrectly. The flash-based PICs/micros today are sometimes funny though. That PIC is ROM only so it should be safe. However, in a commercial product it's a pretty safe bet the security bits are set and you can't retrieve the .HEX image. It shouldn't hurt to try. PS: why are you needing to replace the PIC? PS2: should be pin-compatible replacement PICs available now

18th February 2009, 06:25 PM	#7
Samuel Rock diyAudio Member Join Date: Dec 2008	as i said in my first post, i need to replace it because it does not work right. it makes a poping sound when installed in the amp. i have tried swapping it into a my test unit and i get the same poping sound from my know good test unit.. if i put my known good pic from my test unit into the unit that has come in for service the noise goes away.. thus there is a problem with the pic.. i have replacement chips. just need code to load on chip.. the programmer i have will only read 3ffff from the working chip.. i have a new chip programmer on the way as i dont know if my old one is working as it should. Sam

18th February 2009, 08:10 PM	#8
MartyM diyAudio Member Join Date: Oct 2006 Location: Monroe, North Carolina, USA	Hi, sorry if I misunderstood the original post. If your programmer/reader is working correctly, and you get "3FFF" on a read, then unfortunately it's locked and can't be read. Perhaps you could get the .hex file from Orion? Otherwise, maybe make a "saved search" on eBay for it to email you automatically when one pops up there. Hmm...sorry I couldn't be of more help.

18th February 2009, 08:43 PM	#9
Samuel Rock diyAudio Member Join Date: Dec 2008	yea i was thinking it was going to be locked.. bummer.. that this is a perfect working amp with a bad pic chip... as the amp will not run with out it... Sam

19th February 2009, 01:45 AM	#10
Samuel Rock diyAudio Member Join Date: Dec 2008	Well i take back what i said about the amp not running without the pic.. it seams the amp will run but does not light up the power led.. i all the xovers work high and low.. tomorrow i will check that the bridge and phase switches work. as of right now i do not see any function of the amp loss with out the pic just the power led... I am thinking that the pic may be for the intelli-q. Any one have any input? I will post what i find tomorrow, im calling lights out for tonight.

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