Ibanez - GE-300 Power Equalizer

HoggYBhoY · Post by **HoggYBhoY** » 25 May 2015, 13:30

the diode at the lED says 28 or 2B

sinner · Post by **sinner** » 25 May 2015, 23:06

I need more pictures of the wiring, can you do them for me?

I see no values on the sliders, they may be on the other side of the body. If you can unscrew them and take few pictures - that would be great

I got the main board drawn (layout), and partial schematic done, I need the picts/info above to finish it up

HoggYBhoY · Post by **HoggYBhoY** » 25 May 2015, 23:56

Thanks so much man its really appreciated!!
here are the pics the battery clips off to the left.
some of the screws that hold the sliders in place are stripped so
I cant get them off maybe someone else will be able to check.

HoggYBhoY · Post by **HoggYBhoY** » 26 May 2015, 00:07

the power jack connects to a battery clip adaptor that I made which then attaches to the pedal battery clips

sinner · Post by **sinner** » 26 May 2015, 00:09

Do you ever sleep?

Shame with the sliders

You have a little preview on my Facebook page

Thanks for the pics. This is what I needed

HoggYBhoY · Post by **HoggYBhoY** » 26 May 2015, 00:26

yeh ive completely stripped one screw trying

haha ill be going to bed soon working tomorrow.
I've got some OPA2134PA burr brown op amps here and I was going to replace the originals
as they did distort a bit with the boost up full so ill be changing these aslo

HoggYBhoY · Post by **HoggYBhoY** » 26 May 2015, 10:23

Another pic

tube-exorcist · Post by **tube-exorcist** » 27 May 2015, 06:22

sinner wrote:You will have the schematic tomorrow

I'm on it

So far no schematic yet.... but here is a chance for another (broken) one:
https://www.ebay.com/itm/Vintage-Japane ... 3cfaa1b572

sinner · Post by **sinner** » 27 May 2015, 07:26

Wont happen before Friday. It's holiday break at schools here and my kid stealing all my attention

I can post the layout easy to trace from. It's community AG, you will have your chance to help out

HoggYBhoY · Post by **HoggYBhoY** » 27 May 2015, 08:27

tube-exorcist wrote:
sinner wrote:You will have the schematic tomorrow

I'm on it
So far no schematic yet.... but here is a chance for another (broken) one:
https://www.ebay.com/itm/Vintage-Japane ... 3cfaa1b572

Yeh I might have to buy that just incase the broken bit
Is the big hybrid thing !

HoggYBhoY · Post by **HoggYBhoY** » 27 May 2015, 23:06

Sinner your a star thanks so much !
So I can now use this to find the fault
Where do I start ??
sorry for being a noob! Lol

ppluis0 · Post by **ppluis0** » 28 May 2015, 00:49

HoggYBhoY wrote:Yeh I might have to buy that just incase the broken bit
Is the big hybrid thing !

The "big thing" that appears in the previous images is nothing else than a 0.27uF polyester capacitor...

Cheers,
Jose

HoggYBhoY · Post by **HoggYBhoY** » 28 May 2015, 10:04

ppluis0 wrote:
HoggYBhoY wrote:Yeh I might have to buy that just incase the broken bit
Is the big hybrid thing !
The "big thing" that appears in the previous images is nothing else than a 0.27uF polyester capacitor...

Cheers,
Jose

One of the guys had said it was a hybrid
And not easily replaceable if it is that part
That is broken , I was gonna buy that broken
One on eBay for parts incase I needed it
Some one else has bid on it already GRRR!

tube-exorcist · Post by **tube-exorcist** » 28 May 2015, 14:20

Repair advice:
Remove TR801, IC801 and IC802.

Replace TR801 with a new one (can be any japanese small-signal NPN-transistor)
Replace IC801 and IC802 with a new one and your unit should work again (If you don´t have a 1458 at hand, then use a 4558 instead).

HoggYBhoY · Post by **HoggYBhoY** » 28 May 2015, 14:41

Well i have 2 burr brown OPA2134PA op amps here
Which I was planning to put in the pedal anyway as the current
Op amps can distort a bit with the boost up full
I've got a few spare bc109b transistors here would these
Be a suitable replacement if so what hfe values would I need ?

tube-exorcist · Post by **tube-exorcist** » 28 May 2015, 16:43

HoggYBhoY wrote:Well i have 2 burr brown OPA2134PA op amps here

Take care about possible oscillation

HoggYBhoY wrote: Which I was planning to put in the pedal anyway as the current op amps can distort a bit with the boost up full

funny hearsay

HoggYBhoY wrote: I've got a few spare bc109b transistors here would these be a suitable replacement if so what hfe values would I need ?

Hfe doesn´t matter but the pinout is different so you must "adjust" the pins properly.

HoggYBhoY · Post by **HoggYBhoY** » 28 May 2015, 16:55

Yeh that's cool I know the pin out I used them in my
Wah pedal. Right if hfe doesn't matter I could use any npn
Tranny ? So I was wondering , Why would they have used that specific part ?
Sorry if that's a stupid question

sinner · Post by **sinner** » 29 May 2015, 00:07

Promised schematic

Just the component names but should be enough

It's late, I'm going to bed. I will update the schemo with values sometimes around the weekend

Updated schematic on the next page

ppluis0 · Post by **ppluis0** » 29 May 2015, 01:39

HoggYBhoY wrote: One of the guys had said it was a hybrid
And not easily replaceable if it is that part
That is broken , I was gonna buy that broken
One on eBay for parts incase I needed it

Don't worry about that component since isn't any sort of hybrid or "obscure" custom part...it's nothing more and nothing else that an inexpensive capacitor...

Cheers,
Jose

sinner · Post by **sinner** » 29 May 2015, 11:36

@HoggYBhoY

I need pictures or value confirmation of following parts

- R803 (10k?)
- R806 (1k?)
- R809 (150R?)
- 813 (360R?)

Thanks

Ibanez - GE-300 Power Equalizer [schematic]