Indicator LED pulling up line
Looking at the BA10339 datasheet, it is not capable of sinking 20mA. 

  

You should not attempt to sink more than 6mA unless you are selecting parts, and it is doubtful you could ever sink 20mA on even the best selected devices. 

RN5 would appear to be unnecessary, but you'd only get a pullup to about 2-2.5V so I'd suggest you leave it in.