all downloads .... free
to download dct4 flash file
download you need the AL-plugin
How to download the flashfiles here

Datapackage

Modell Version Asic Type Datapackage  6020 (RM-30) 5.22 2 Download    6020b (RM-31) 3.52 2 Download

Service Manual

Modell Level Asic Type ServiceManual  6020 3 + 4 2 Download

Disassembly Video

Modell What Asic Type Video  6020 Disassembly 2 not available