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Opto-isolated Output Board Option Hydrastep 2468CB & 2468CD Manual
3c-14 24685034
3C.4 COMPONENT REPLACEMENT
The components used on the opto-isolated output board are fitted using ‘surface mount
technology’ and fault remedial action is by the replacement of the whole output board. The
only components fitted to the board that the general user can replace are the nylon spacers.
3C.4.1 REPLACEMENT OF NYLON SPACERS
The replacement of nylon spacers fitted to the output board requires access to the non-
component side of the PCB.
Note: Spacers will only be fitted on the output board if a second output board is to be fitted or
has been fitted.
The spacers are secured in their holes by nut and nylon washer. To carry out a spacer
replacement, the output board has to be removed from the input board. The procedure
adopted is:
WARNING Mains voltages are present in this instrument when power
is connected. De-energise before opening front cover.
1. Isolate the 2468 electronic enclosure from the power supply.
2. Gain access to the PCBs and undo sufficient
connections for the removal of the output board
containing the defective spacer.
3. Remove the output board(s) by applying pressure to
the upper spring-loaded spigots and easing the output
board oft its spacers and out of its Berg plug/socket
connection.
4. Undo the nut and washer securing the faulty spacer
and extract it from its hole, see inset diagram.
5. Fit the new spacer in position, align correctly on the
board and secure firmly using the M4 nut and nylon
washer.
6. Refit the PCB(s) into the enclosure, re-connect the
PCB(s) as required and close the enclosure cover.
Re-apply power if required.
3C.4.2 PARTS LIST - OPTO-ISOLATED OUTPUT BOARD 24680505
The following list items are available as spare parts:
Item Description
Mobrey Part
Number
Item Description
Mobrey Part
Number
Electrical:
PCB assembly:
Socket 5K2 free (8-way)
Socket 5K3 free (8-way)
24680505A
351508100
351503100
Mechanical:
Spacer, nylon 15.9 LG
Washer, nylon
Nut, M4
412012080
411999910
410031020