COMAND 2.0 looking SHEMATIC DIAGRAM...

[prusony]

It's real ?????

[laxitylabs]

Yes, but for skilled repair technicans only.

[prusony]

How much?
:)

[gapco]

Comand 2.0 ?????? What brand and what model.

[prusony]

PROZESSOR-MODUL: 8 618 001 132 / MB COMAND2.0/203E 0014861
NAV-MODUL: 8 618 123 1124/1160/0955 MB COMAND2.0 Y0023836

BOSCH 7 612 001 743 BO1143Y3793664
MERSEDES-BENZ A203 820 91 89 0081

[gapco]

OK. Blaupunkt model BO 1143. What is the problem with the HU?

[prusony]

The scheme will solve all my problems ....

[gapco]

Sorry the schematics are not for sale or distribution.....If you want help tell us what is the problem with the COMAND, maybe we can help you.

[prusony]

When connecting speakers on the table, in external power supply protection trips.
TDA74754 is replaced.
When speakers are NO connected on outputs TDA full order.
Strange defect...
(Device has been in several masters :( )

[gapco]

1. Replace TDA 7454 with original type. Do not use cheap Chinese made IC. This is very common problem.
2. Replace the two yellow tantulum capacitors on the right side of the audio IC. 330uf 35V. These read OK when measured with a
DVM but are actually defective.
3. Check the cooling fan. Sometimes it is in short circuit and it pulls down the voltage supply to the audio IC.

Good luck.

[GolfmkI]

1. Replace TDA 7454 with original type. Do not use cheap Chinese made IC. This is very common problem.
2. Replace the two yellow tantulum capacitors on the right side of the audio IC. 330uf 35V. These read OK when measured with a
DVM but are actually defective.
3. Check the cooling fan. Sometimes it is in short circuit and it pulls down the voltage supply to the audio IC.

Good luck.

Thanks!!

Ante advice for those that are not powering up?? I have a command 2.0 that won't power up.
Any help will ne appreciated.

Thanks beforehand.