Roche Diagnostics April 2007
A-26 Service manual · Version 2.0
4 Description of modules 91xx pH/Electrolyte Analyzers
Description of modules
interconnections. The main power receptacle can also be replaced by removing the
two screws holding this assembly.
SBC board
After the rear panel has been removed, the SBC Board is accessible for removal. This
circuit board can be removed by removing the seven screws securing the board to the
housing and by disconnecting electrical connectors from the power supply module,
display board and lamp board.
e
For details, see Rear panel assembly on page A-25.
The electrode push pins can now be replaced by simply pulling the connecting pin
from its socket. When installing the board, make sure to place the plastic washers
under the screw heads.
Due to the update of the 9180 Electrolyte Analyzer according to IVDD compliance a new power
supply module "POWER SUPPLY 9180 >SN 12001" is available and compatible with 9180
Electrolyte Analyzers serial number > 12001 only.
The former power supply "MODULE POWER SUPPLY, ISE" is still available and has to be used
for 9180 Electrolyte Analyzers SN < 11999, for 9110 pH Analyzers and for 9120, 30, 40 and 81
Electrolyte Analyzers.
e
Further information: see the 91xx Spare Parts List.
After changing the main board or the power supply always perform a measurement of protective
ground resistance to ensure a safe connection of the system ground. Always measure with the power
cord attached to the analyzer. The resistance measurement has to be done between the ground pin
of the power plug and several ground connectors placed on each of the analyzer's electronic
components such as power supply or main board and shielding. The total resistance should not
exceed 0.5 ohms. Be sure to consider the resistance of the ohmmeter's connecting cables.
Due to the update of the 9180 Electrolyte Analyzer according to IVDD compliance a new SBC
board "MAINBOARD 9180 >SN 12001" is available and compatible with 9180 Electrolyte
Analyzers serial number > 12001 only. The former SBC board "MAINBOARD 9180 <SN 11999"
is still available and has to be used for 9180 Electrolyte Analyzers SN < 11999.
Further information: see the 91xx Spare Parts List.
After changing the main board or the power supply always perform a measurement of protective
ground resistance to ensure a safe connection of the system ground. Always measure with the power
cord attached to the analyzer. The resistance measurement has to be done between the ground pin
of the power plug and several ground connectors placed on each of the analyzer's electronic
components such as power supply or main board and shielding. The total resistance should not
exceed 0.5 ohms. Be sure to consider the resistance of the ohmmeter's connecting cables.
Note
Due to the update of the 9180 Electrolyte Analyzer according to IVDD compliance the printouts,
display messages and data links sequences of the 9180 Electrolyte Analyzers serial number > 12001
will show "Roche" instead of "AVL". This also applies to 9180 Electrolyte Analyzers serial number
< 11999 in case of replacing the main board "MAINBOARD 9180 >SN 12001" or the program set
"PROGRAM SET 9180".
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