mb w221 amp repair most ic

**wyz1056** · 3rd December, 2015, 04:59 PM

hi,anyone know this xs8805b0bq,how to read/write dump!

**gapco** · 4th December, 2015, 01:38 PM

This is what you need to read/write to the 8805 IC. It is difficult without these programmers and the software. Picture 054.jpg

**wyz1056** · 4th December, 2015, 04:36 PM

very great,friend,this most chip have bad,i changed new ic is no work,
can you help me?friend.what you tool do？

**RadioChiP** · 4th December, 2015, 07:19 PM

Do you have in board TMS320

**gapco** · 6th December, 2015, 02:58 PM

Originally Posted by wyz1056

very great,friend,this most chip have bad,i changed new ic is no work,
can you help me?friend.what you tool do？

The tools are supplied by the manufacturer

**gapco** · 6th December, 2015, 03:00 PM

Originally Posted by RadioChiP

Do you have in board TMS320

Why is this so important ?

**soimu** · 6th December, 2015, 08:05 PM

Hi I think that the firmware in Am29LV160D
I would first tested verify sdram 48lc2m32b2

**wyz1056** · 8th December, 2015, 04:09 PM

new xs8805b0bq put is working?

**simaservis1108** · 9th December, 2015, 01:15 PM

Firmware is in BGA flash.
XS8805B0BQ doesn't contain internal memory.

**gapco** · 9th December, 2015, 10:37 PM

Originally Posted by simaservis1108

Firmware is in BGA flash.
XS8805B0BQ doesn't contain internal memory.

There is onboard programmable flash and ram memory in this chip. Here is the promotional data sheet

http://www.digchip.com/datasheets/pa...339/OS8805.php

**wyz1056** · 10th December, 2015, 05:36 PM

thank gapco,i have change new this chip,is no work,have look pdf ,have 128kb flash memory and 4kb data ram!

**gapco** · 10th December, 2015, 07:16 PM

Originally Posted by wyz1056

thank gapco,i have change new this chip,is no work,have look pdf ,have 128kb flash memory and 4kb data ram!

Put back the original chip because that is programmed. The new chip is empty and you do not have the tools for programming. The fault maybe is the corrupted flash chip AM29LV160. To read/write to this flash you still need the programming tools. I repair between 8 to 10 amplifiers like this every month. I have NEVER replaced the OS8805 chip.

Good luck.

**simaservis1108** · 10th December, 2015, 10:45 PM

My bad,I wanted to say that all relevant data for his error is stored in AM29LV160.

**wyz1056** · 12th December, 2015, 02:28 AM

have good working cjip xs8805 buy?

**gapco** · 12th December, 2015, 08:11 AM

Originally Posted by wyz1056

have good working cjip xs8805 buy?

Refer to post #12

The problem is not the XS8805. The fault is the flash IC that has lost it's memory. You do not have the factory tools and software to fix the problem.