Becker BE754 code, unlock

**makkki79** · 23rd September, 2016, 08:40 PM

Please help me to decode radio
radio beckergrandprix electronic
model no.BE754
serial no.:T673303
rom memory PCF8571
procesor SGSG754.1

I read this as a memory 24c01
and booth radios is blocked (----)
can anybody now hot to solve this problem???

Dump is attached!

**damian475** · 17th October, 2016, 02:09 PM

Any solution for this? have same problem. Is avialable special tool for resset this state. Mabe some1 have info how to do that?

**safeirakli** · 17th October, 2016, 02:29 PM

try ......... 2607

**shooting** · 17th October, 2016, 02:43 PM

Originally Posted by safeirakli

try ......... 2607

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wbr

**damian475** · 17th October, 2016, 03:16 PM

On this radio cant write code, only reset procedure but how?

**Raimax** · 17th October, 2016, 03:30 PM

This radio don't have code. It needs Mercedes auto
I found this information on the Internet

**grigorean** · 12th November, 2016, 03:24 PM

I have the same problem with one radio Becker Grand Prix 754.Is there any way to unlock it?
Thanks in advance.

**stylius** · 21st February, 2017, 11:02 PM

Hello. So somebody find way how reset this radio?

**lwd11** · 26th January, 2018, 02:16 PM

How to solve this problem ?

**Fredv67** · 23rd July, 2018, 08:25 AM

Have the same problem.
For me the DIP8 with the designation PCF8571P is installed.
Does the dump have to be programmed here?
Thanks for your help (;-)

**treran21** · 23rd July, 2018, 09:11 AM

PCF8571P is EPROM and not EPROM!
She must be energized all the time.
For this, there is a battery inside the radio.
When the battery is discharged, the dump in the PCF8571P is erased by itself.
Need a dump from the working radio
Read without disconnecting the battery .
In the non-working radio, replace the battery.
To contacts 4 and 8 PCF8571P be solder battery 3.3V.
To the 4, 5 and 6 buses, connect the GND, SDA. and SCL from programmer
Programing PCF8571P read with the working radio dump.
Do not solder the battery to disconnect the programmer wires from the PCF8571P.
Also, without soldering the batteries, the PCF8571P should be soldered in the radio and only then it can be repaired

I am sorry ( google translator )