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3.8 Adjustments and Repair tips
Ignore mode
WARNING !
This mode will start the product directly up in Service Mode, and can be used if it
will not start normally.
To set the product into Ignore mode, carry on with the following:
-
set the product into standby
-
set the product in Service position
-
short circuit two soldering dots on PCB AV as shown below, and at the same
time power on the product
This will start the product directly in service mode, regardless of the error. Thereby
it may be possible to read out e.g. error codes.
PCB6
Replacement of Main microcomputer PCB6
-
If replacing only the Main microcomputer PCB6, it is necessary to read out existing
settings and flash these back into a new PCB6
-
If both EEPROM and AV board (Chassis) are defect (e.g. caused by a lightning
stroke), a preprogrammed Main microcomputer can be ordered separately by
contacting Bang & Olufsen.
Testing a Main microcomputer PCB6
It is possible to use a PCB6 Main microcomputer from a similar type of product for
test purpose, but the serial no. and other important adjusting settings will not
match the product correctly. Therefore it is important to replace the original PCB6
after a test.
The software programable microcomputer version (flash of both APPLICATION and
EEPROM software) can be recognized by having no IC sockets on the PCB.
Another way to identify if a product has the flash version module, is to check if
ServiceTool has APP software flash menus for the specific product.
ABO-CENTER
v/HENRIKSENS
ELEKTRONIK