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Pete, Engineer
Category: Electronics
Satisfied Customers: 18115
Experience:  Over 16 years of experience in the Electronics and IT industries.
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Digitech RP12. Displaying wrong characters.

Customer Question

I have a Digitech RP12. It seems to be working ok but has odd characters in the display. Even on power up the word 'DigiTech' isn't displayed properly. It reads 'DmgmTegl'.A patch that was named 'Cleen Steel' now reads 'Gleen$Wteel$'.It seems like some of the letters are moved up the alphabet by 4 steps. The internal battery is ok. I also initialised it.

Submitted: 4 years ago.
Category: Electronics
Expert:  Pete replied 4 years ago.

Welcome to JustAnswer!

I am Pete, and I'll be happy to assist with your question.

It sounds as though either the LCD display is bad, or the display connection is not good.
Check all internal wiring and solder joints.
If no bad connections are found, then the display will need to be replaced.
Customer: replied 4 years ago.

Hi Pete, Thanks for your help. I have checked out all wiring and solder joints. I have been searching the Internet for a display board. LM1140SYL is on the board. Is this the board number? have that part number listed but it is described as a semiconductor.There is no image for it. Have you any idea where I can get a board and a schematic.Is the board specific to Digitech or used in other equipment.Also how can I be sure the right data is being sent to the display board? Any help will be appreciated.


Expert:  Pete replied 4 years ago.

Hi Ivan,

LM1140SYL is the part number for a diode.

The display board is a DigiTech custom part.

You can get a replacement board from DigiTech - (801) 566-8800

Not sure if they will also give you the schematics though, but it's worth asking for anyway.


Customer: replied 4 years ago.

Thanks Pete,

I contacted DigiTech and the board is no longer available. They did send me a schematic. I am now working on the idea of connecting some sort of display to it so I can be sure it will fix the problem. I have a display for a Korg GT-3 that I am thinking of trying. I have schematics for both. I will let you know how that goes and take it from there.

Customer: replied 4 years ago.
Relist: Incomplete answer.
Expert:  Pete replied 4 years ago.
Hi Ivan,
I see you have relisted your question as Incomplete Answer.
Please let me know what further assistance you require?