Roland - AP-7 Jet Phaser  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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modman
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Post by modman »

Aharon contributed this PDF from the service manual containing pcb layouts, block diagram and construction notes.

Roland AP-7 Phaser service notes

thanks so much for sharing!
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Roland Jet Phaser AP-7 Service Manual.pdf
Roland AP-7 Phaser service notes
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Aharon
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Post by Aharon »

Welcome !!!

Maybe somebody can figure out the off board wiring,I couldn't.....
Aharon :oops:

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Post by analogguru »

OK, Aharon: you want to figure out the offboard-wiring ?

Have a look here, but: caution that you don´t get nuts, from the highres guts:

https://img148.imageshack.us/img148/9421/jp1dm9.jpg
https://img148.imageshack.us/img148/579/jp2on7.jpg
https://img520.imageshack.us/img520/6397/ph3ui2.jpg
https://img520.imageshack.us/img520/5964/ph9fw5.jpg
https://img504.imageshack.us/img504/2210/ph10lc4.jpg

Could you smell the vintage electronic ? :wink:

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Post by Aharon »

Thanks for those shots analogguru!!!!!!
Snifffffffffff........yes I can smell the old electronics.........ahhhhhhh......
Thanks
Aharon

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Post by MrHuge »

Wow! how things travel on the net... That looks suspiciously like the copy of the AP7 schematic I scanned! Cool...

Here are more...

http://www.aronnelson.com/gallery/v/MrHuge/album102/

-Mr. Huge

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Post by Stompmodder »

modman wrote:Aharon contributed this PDF from the service manual containing pcb layouts, block diagram and construction notes.

Roland AP-7 Phaser service notes

thanks so much for sharing!

Just wondering if someone have the schematic of this pedal. Thanks

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Post by IggY »

Just read this thread one more time to stop wondering.

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Post by Bernardduur »

Can someone tell me why this unit sounds so good on bass? I've tried (too much) phasers on bass but this was the only one that stood up my abuse / thoughts on how one should sound on bass.

Great unit btw!
'No more....... loud music.......'

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Post by Bernardduur »

I was looking into this subject now for a long time; need to build one for my bass use (as does Larry Graham)

There are 4 JET settings, 2 non jet setting and a fast / slow setting on which only the slow speed can be set by a potmeter

1 and 3 JET give shallow modulation (depth is determined by point 10 / 12)
2 and 4 JET give a deep modulation

Difference between 1-2 and 3-4 are the JET EQ; one has mids, one lacks it.

5 and 6 are just shallow and deep modulation without the JET

You can make these changes more easily switchable with individual switches.
'No more....... loud music.......'

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Post by littleBloona »

Bernardduur wrote:Can someone tell me why this unit sounds so good on bass? I've tried (too much) phasers on bass but this was the only one that stood up my abuse / thoughts on how one should sound on bass.

Great unit btw!
What a difference two diodes can make :arrow:

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Post by chicago_mike »

I get a 4040 error when trying to see the gut shots..can some one pm them to me or email me the gut shots?

Or are they uploaded elsewhere?
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Post by lynessmy »

I have the TRACE side...downloaded from somewhere...but no component side.....

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Post by chicago_mike »

Ill take it. :) Im itchin to clone this thing. Larry Graham uses this to great effect. 8)
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Post by analogguru »

chicago_mike wrote:Ill take it. :) Im itchin to clone this thing. Larry Graham uses this to great effect. 8)
Are you really that greedy, man ? :wink:
Ok, here you go for the track side..... and as a "bonus track" you will get the component side too, taken by ebay user "coastal.a.a".

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Post by NoGlory »

Does somebody maybe have a PCB layout? I'm going to clone this thingy, but the less the work, the better :applause:

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Post by lynessmy »

NoGlory wrote:Does somebody maybe have a PCB layout? I'm going to clone this thingy, but the less the work, the better :applause:
This is all i have. NO layout.
Let me know if you manage to work this out.

Again, this is downloaded from somewhere which i couldn't recall now. If anyone know where is the origin, give him a credit.

Image
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Roland AP7 layout
Roland AP7 layout

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chicago_mike
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Post by chicago_mike »

Hey....

What size do I need to alter this too, so it doesn't print out a full page sized pcb? I hope to get this etched today. :)
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Post by lynessmy »

use the width of the DIL IC....the distance between 2 rows is 7.5mm. Scale it....

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Post by chicago_mike »

Okay i printed this out but it came out all fuzzy..I forgot its at 72dpi resolution...TERRIBLE.


So I resized the image to 5.5inches..letf the constrain portions on, 5.5 inches mind you. ANd set resolution to 1200 dpi.

I think I did the resolution first though. Did a little cleaning up with levels (photoshop again)

now I think it should print nice and clear. Still at 1200 dpi though normal 8.5x11 is 300 dpi. So just a little more adjusting and we have ourselves a rpintable pcb of the jetphase.

Now there IS a second board but I think thats for the speed control, and just a few components I can do on a breadboard, or vero or whatever. :)

next step is to be able to print 2 on a sheet of photopaper..or some cheap glossy paper that will still dosolve in water. I want to try to find a mixture of something that will help disolve the paper but leave the toner....
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Post by lynessmy »

Hi...chicago_mike....i was a noob at the resolution thingy.
Appreciated if you have some guide or any link to share to get thru that, especially how to play with PHOTOSHOP for RESOLUTION and SIZE.
TQ

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