PARTS I buy all of my coin cell batteries from mouser.com The battery is a CR2032 Lithium Battery (Mouser P/N: 658-CR2032) Luckily, there is already a battery holder installed. Less work! I recommend buying a name-brand battery like Panasonic. Saving fifty cents to purchase an off-brand is, in my opinion, a bad idea. This battery is going to last a very long time so get a quality one without the need to worry about a cheap-o brand leaking and ruining your circuit board PROCEDURE Before you start, make sure you have saved all of your patches and tones to an external device like your computer or RAM Card * * * All of the internal patches and tones will be erased when the old battery is removed! * * * Make sure you are wearing eye protection, are properly grounded and working on a static-free workbench or table. * * * Please don't ignore the advice of eye protection, grounding and a static-free area * * * The chances of finding a replacement custom Roland IC or a circuit board... slim to none D-110 BATTERY REPLACEMENT The replacement takes about 10 minutes from start to finish. Take extra time and be extremely careful to avoid any ESD nightmares (Refer to the images below) 1) Unplug the synthesizer! 2) Use an anti-static wristband to protect the synth from ESD 3) Remove six screws from the bottom panel which are holding the top cover in place 4) Remove three screws from the back panel 5) Remove three screws from the left panel and three screws from the right panel (these hold the rack ears in place) 6) Remove two screws from the top then slide the top cover back to access the battery and battery holder 7) Place a small thin piece of cardboard near the front metal tab of the battery holder This prevents the battery from touching any components on the PCB when it is removed. A business card works great for this 8) Replace the battery with P/N: CR2032 and reassemble the case 9) Press and hold [ WRITE/COPY ] and [ ENTER ] buttons simultaneously when powering on. This will initialize the system 10) Reload 64 Patches and 64 Tones from a *.SYX file or a Data RAM Card as detailed here and here D-110 COVER REMOVAL
D-110 BATTERY LOCATION 
D-110 VOLUME POTENTIOMETER REPLACEMENT While you have the case open, here are some additional notes for those who want to replace a scratchy or intermittent Volume Potentiometer. Replacing this part on the D‑110 is very easy. It's a "Drop‑In" part and no modifications are needed. Just unsolder the old potentiometer and pop in this replacement. It's a 50K Ohm Dual Gang Logarithmic Taper and is available from Mouser for only $3 (USD) Mouser P/N: 652-PTD902-2015KA503 Bournes P/N: PTD902-2015K-A503 Note: After removing the top cover, there is no need to completely disassemble the front faceplate to remove the Volume Board. Remove two small flat‑head screws on top and one on the bottom. The Volume Board assembly will slide out for easy access 
D-5, D-10 AND D-20 BATTERY REPLACEMENT Replacing the battery on a D-5, D-10 and D-20 is quite easy because it's not soldered onto the PCB and has a battery holder 1) Unplug the synthesizer! 2) Use an anti-static wristband to protect the synth from ESD 3) Remove twenty screws from the bottom cover and the rear side which hold the bottom cover in place 4) Place a small thin piece of cardboard near the front metal tab of the battery holder This prevents the battery from touching any components on the PCB when it is removed. A business card works great for this 5) Replace the battery with P/N: CR2032 and reassemble the case 6) Press and hold [ TUNE/FUNCTION ] and [ WRITE ] buttons simultaneously when powering on. This will initialize the system 7) Reload 128 Patches and 64 Tones from a *.SYX file or a Data RAM Card as detailed here and here 
Safety Precautions Modifications made to any factory stock equipment will always pose an element of risk. Sometimes mistakes are made which are irreversible. Improper soldering and handling of electricity can cause serious injury and damage the D-110. Use caution when handling static sensitive devices and the PCB. Make sure you are properly grounded, working on a static-free workbench or table and wearing eye protection during any soldering tasks. The author is not responsible for any damage or injury resulting from this DIY info. Use this DIY information at your own risk. And, I can't stress enough, the importance of wearing eye protection while soldering. That stuff flies everywhere sometimes! |
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