The note & sharp are the same tone... eg. c & c# are the same tone. Would you please tell me if there is a quick fix. This is only happening on a few notes

I'm sorry, but I do not recognize that model number and can't find it online. Is there anymore info you can provide to determine what exact organ you have?
Please note that only Hammonds (B-3 C-3 A-100, etc) with a tone wheel generator require oiling.

Some hopefully easy fixes : Input jack could be the problem, or connection from the amp to the speaker. Does the speaker hum a bit with the volume up almost all of the way without anything plugged into the unit? If not, check the connection from speaker to amp.

If it does hum slightly when u crank the volume, check your input jack -- it might be jacked up (pardon the pun) and you can fix that easily by soldering in a new one.

Yes there's a way. Use Registration Memory (I shorten it to: RM) ..
RM have 8 banks and 4 bank numbers. For changing banks, press BANK several times.
Example :

• choose tone (eg:500)
• press BANK where you want to store. (eg:1)
• while holding down STORE button,press registration number where you want to store (eg:3) Release store button. Finish.

Next :

• choose tone (eg:038)
• press BANK where you want to store. (eg:1)
• while holding down STORE button,press registration number where you want to store (eg:4) Release store button. Finish.

Anytime you press RM bank 1 number 3 (one key), the sound is 500
Anytime you press RM bank 1 number 4 (one key), the sound is 038.

Notes:

• RM not only can save tone, but can store style,overall setting live performance,etc.
• RM functions are disabled while you are using the SMF player, song memory or demo.
• RM are also disabled while you are using the floppy disk drive.

Read your user manual about keyboard split. OFTEN the rhythms use the keys below F sharp for the chording of rhythm. When in this mode, you should restrict your melody to notes above F sharp that is to the left of middle C. If you play melody below this it will confuse the rhythm chording. You can likely change the split point of the keyboard, however, the F sharp split is the standard and I would suggest staying with it.

Sounds like a problem with the channel itself, if the clean channel works then its not the lead, input, guitar or the drivers. You have to be careful when opening up amps as some can hold a residual charge and there can be danger of electrocution.

I would recommend getting it looked at by a pro, it doesn't sound like an expensive fix.

Inspect for damage, especially hairline cracks. Also inspect for contamination or dirt that will change the resonant frequency. AND VERIFY the tuner you are using is accurate. Do not compare to a piano which MAY be out of tune... in fact, pianos are STRETCH tuned, that is the higher notes are SHARPED and the LOW notes are FLATTED deliberately. Comparing your chimes to a piano, the E5 would appear flat. Use a good electronic tuner to verify the pitch, not a piano,

Behinger normally doesn't give schematics... However here is a link to a BX1200 schematic at a foreign site. OFTEN they use the same circuitry within a series of equipment.

http://elektrotanya.com/behringer_bx1200_sch.zip/download.html

Note it is a zipped file of both F and H revisions.

Please note that the symptoms you describe are NOT usually something you will find in the preamp, but rather in the interconnections. It appears that the BX1200 uses TRS inputs at the jacks... not sure what your BX4500 does...

Make sure ALL your interconnected equipment is powered from the SAME receptacle to avoid ground loops and hum. Use balanced lines everywhere possible.

Usually the loop in is used with an EXTERNAL effects module where the audio signal is "looped" out through the external effect module and then back to the power amp to drive the speaker in the cabinet. The LOOP IN jack would receive signal from the EFFECTS module OUT jack.

The source to go TO the effects module INPUT may come from a jack such as preamp out, or sometimes the same loop jack if it usess the TRS (Tip-Ring-Sleeve) connection method.

If you do not have an external effects module, all this is a moot point in your case.

See the answer to: http://www.fixya.com/PostAnswer.aspx?thid=3726424&prdid=360392

since your question is exactly the same as asked in that question.

The volume is a common problem ... Search for wiring diagrams for your guitar to find a better wiring. Or take it to a guitar repair centre to have it fixed.

To tell which pickups are selected with the switch if it doesn't have the little plate telling you, Turn one volume down and flick the switch one way so you can hear just one pickup.

Two ways of telling which one it is picking up ... A toppy tone is the one nearest the bridge ... a bassy tone is the neck pickup ... The middle selection on the switch is both coils selected ... If you cant tell by tone ... Tap the pick up and you'll soon hear which one you have selected.