Boss DR-55 4011 Chip replacement. Part 2: Installing IC Socket and new chip.

Here’s part 2 of the replacement of the 4011 chip. I bought a cheap (and very nasty) 29p 14-pin IC socket from Maplins, plus a CD4011Bp (not the correct UBP) for 49p.


Follow the pictures above and you’ll see how easy this is..

  1. Install new socket (a bit of soldering)
  2. Insert chip
  3. Re-assemble (see part 1)

Unfortunately, this didn’t make the slightest difference (other than the programming seems to be half-a-beat out due to the use of the buffered chip..)

So, there’s something else amiss.

Could that be to do with the “missing component” – see the last photo, above?

Looks like here should be something installed here, but there isn’t.


All I get is the hats, which work on both settings. No drums. Does this mean that:

a: It’s not registering programming or

b: It’s just not playing sounds


Any suggestions gratefully received – just post a reply below..





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