How to rework R270 Programmer PCB for Mercedes EZS

Hello, mates. I want to share with you my experience about R270 BDM Programmer, especially about how to rework R270 pcb.

I’ve buy one of this chinese clones and problems starts.

First of all – continuously erasing flash of Mercedes EZS’s.

Then – difficulties with erasing increasement registers of 35080, 35080v6 etc.

Then i found one working unit and open it to see differences.

In the pictures you can see my unit, which now is perfectly working.

r270-programmer-pcb-rework

I’ve replace R270 CAS programmer resistors:
R25 from 10kOhm to 1kOhm
R4 from empty place to 60 Ohm
R15 from 27 Ohm to 15 Ohm
and one resistor packet from 10kOhm to 4.7kOhm.

That’s all and work for me.

Already tested on w211, w209 and w164 EZS’s. Works perfectly

You can see my working board from pictures

r270-programmer-pcb-rework-(1)

r270-programmer-pcb-rework-(2)

r270-programmer-pcb-rework-(3)

r270-programmer-pcb-rework-(4)

r270-programmer-pcb-rework-(5)

r270-programmer-pcb-rework-(6)

r270-programmer-pcb-rework-(7)

r270-programmer-pcb-rework-(8)

r270-programmer-pcb-rework-(9)

r270-programmer-pcb-rework-(10)

r270-programmer-pcb-rework-(11)

r270-programmer-pcb-rework-(12)

http://blog.obdii365.com/2017/08/22/r270-bdm-programmer-pcb-rework/

About eobd21

I am a car lover and like to repair car by myself, and know more info about car diagnostic tool and other obd2 tools, share these info with everyone.
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