User guide

I-E67-84-1B February,2002 16-2
3. Remove the four 6-32 machine screws that
retain the Power Supply and pH/ORP/pION Input
PCB assemblies if both assemblies or the
Microprocessor PCB Assembly are being
replaced.
4. Release the keypad ribbon cable connector
latch located on the outside edges of the
connector and remove the ribbon cable from the
connector.
5. Remove the two 6-32 machine screws that
retain the Microprocessor PCB Assembly.
6. Replace the appropriate PCB assembly and
follow the reverse of this procedure to re-
assemble the analyzer.
FRONT BEZEL ASSEMBLY REMOVAL/REPLACEMENT
1. Turn off power to the analyzer. Allow at
least 1 minute for the analyzer to discharge.
2. Remove the Power Supply, pH/ORP/pION Input,
Microprocessor PCB Assemblies as described in
Electronic Assembly Removal/Replacement
procedure.
3. Attach the Power Supply, pH/ORP/pION Input,
and Microprocessor PCB Assemblies to the new
Front Bezel Assembly, and install it into the
Shell Assembly as described in Electronic
Assembly Removal/Replacement procedure.
SHELL ASSEMBLY REMOVAL/REPLACEMENT
1. Turn off power to the analyzer. Allow at
least 1 minute for the analyzer to discharge.
2. Remove the Front Bezel Assembly by
unscrewing the four captive screws and lightly
pulling the bezel from the shell.
3. Remove the Rear Cover Assembly by
unscrewing the four captive screws.
4. Replace the old Shell Assembly with the new
one.