Jenco 3675/3676 PH/ORP Controller

The Jenco 3675 and 3676 are PH/ORP controllers commonly used in PLC setups for factories and other automated systems. They feature a 7-segment LED display for operation and high and low alarms.

Causes

 * Switch is broken off

Solutions

 * Replace switch or manually bridge a few pads to set permanently to PH or ORP. It is recommended to take the product apart before using the PH/mv switch.

Disassembly Notes
Undo the clip that holds the two parts of the housing together (display and body housing).

Undo the two connectors that connect the display to the other boards.

The back PCB can be delicately pulled off by undoing the 2 screws on the back board, then de-mating the male header pins on the back board from the female connectors on the back of the other 2 boards.

The bottom PCB can be delicately pulled off by de-mating the male header pins on the bottom board from the female connectors on the bottom of the other 2 boards.

Bottom PCB
Note model numbers and board revisions here

Left PCB
3672-5C 1201163 020620

Right PCB
3672-4D 1201164 020531

Back PCB
3672-6E

1201165

020531

Basic PCB Name
If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Kits

 * Digikey BOM: https://www.digikey.com/

Related Links

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