Jenco 3675/3676 PH/ORP Controller

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For more information, see this article's corresponding Wikipedia page: Device.
This device is in the WorkNeeded:OriginalParts category because it was flagged as missing information on the original parts. It may have replacement parts listed but those cannot be assumed to be identical to the originals. If you have a list of the original parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables
This device is in the WorkNeeded:General category because it was flagged as missing general information about the device. The information may be incomplete, using default text, or inaccurate and should be verified with external sources if possible. If you can add or correct information on this page, please feel free to edit it and do so.
Jenco 3675/3676
Preliminary Information
Release Year Unknown
Leak Risk Medium
Batteries None
Mounting Technology Through Hole, SMD
Capacitor Types Aluminum Electrolytic, Tantalum, Ceramic
Destructive Entry No

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.

Known Issues

Display not reading normally

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.

Original Parts

Bottom PCB

Note model numbers and board revisions here

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
Unknown/None 2 1000 µF 16V Through Hole Radial 105 °C Aluminum Electrolytic Rukycon (Fake Rubycon) YXA / RA (assumed generic 105C)
Unknown/None 2 330 µF 25 V Through Hole Radial 105 Aluminum Electrolytic Jakec Unknown (assumed generic 105C)
C5, C6, C7, C8 4 0.1 µF / 100,000 pF Through Hole Radial Film
C9, C10 2 47 µF 16 V Through Hole Radial 105 Aluminum Electrolytic Jakec Unknown (assumed generic 105C)
Active Components
RefDes Qty Part Number/Model Number Manufacturer (If Applicable) Explanation Datasheet
Unknown/None 1 L7805CV ST Microelectronics Positive-Voltage Regulator L7805CV
Unknown/None 3 DF01 MIC Group Bridge Rectifier DF005
Unknown/None LM324N Texas Instruments Quad Operational Amplifiers (Quad Op-Amps) LMx24

Left PCB

3672-5C 1201163 020620

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
C12, C13 2 1 µF Through Hole Radial 0 °C Ceramic
Active Components
RefDes Qty Part Number/Model Number Manufacturer (If Applicable) Explanation Datasheet
Unknown/None 2 LM324N Texas Instruments Quad Operational Amplifiers (Quad Op-Amps) LMx24

Right PCB

3672-4D 1201164 020531

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
C29 1 .33 µF / 330,000 pF Through Hole Radial Ceramic
C30 1 47 µF 16 V Through Hole Radial 105 °C Aluminum Electrolytic Jakec Unknown (Gen. 105C)
Active Components
RefDes Qty Part Number/Model Number Manufacturer (If Applicable) Explanation Datasheet
Unknown/None 1 LM324N Texas Instruments Quad Operational Amplifiers (Quad Op-Amps) LMx24
Unknown/None 1 OP07CP Texas Instruments Precision Operational Amplifiers (Precision Op-Amps) OP07x

Back PCB

3672-6E

1201165

020531

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
C15 1 0.33 µF / 330,000 pF Through Hole Radial Ceramic
C18, C19 2 0.1 µF / 100,000pF Through Hole Radial Film
C20 1 .01 µF / 10,000pF Through Hole Radial Film
C22 1 1 µF Through Hole Radial Ceramic
C28 1 47 µF 16 V Through Hole Radial 105 °C Aluminum Electrolytic Jakec Unknown (Generic 105C)
Active Components
RefDes Qty Part Number/Model Number Manufacturer (If Applicable) Explanation Datasheet
Unknown/None 1 CD4070BE Texas Instruments CMOS Quad Exclusive OR Gates CD4070B
Unknown/None 1 LM324N Texas Instruments Quad Operational Amplifiers (Quad Op-Amps) LMx24
Unknown/None 1 OP07CP Texas Instruments Precision Operational Amplifiers (Precision Op-Amps) OP07x
Unknown/None 1 LM2917N National Semiconductor Frequency to Voltage Converter LM2917
Unknown/None 1 KA331 Voltage to Frequency Converter KA331
Unknown/None 1 4N25 General Purpose 6-Pin Phototransistor Optocouples 4N25
Q3 1 C1185
A17 1 78L09 Positive-Voltage Regulators 78L09

Replacement Parts

Basic PCB Name

Electrolytic Capacitors
RefDes Qty Compatible Part Number Order Links
Unknown/None 2 16PX1000MEFC10X12.5 / 860020375017 / 16YXJ1000M10X16 Digikey Mouser LCSC
Unknown/None 2 860020474013 / 860020474013 / 25YXA330MEFC(8X11.5) DigiKey Mouser LCSC
C9, C10, C28, C30 4 860020472006 / 25PX47MEFC5X11 DigiKey Mouser LCSC
Other Capacitors
RefDes Qty Compatible Part Number Order Links
C5, C6, C7, C8, C18, C19 6 R82DC3100DQ50J DigiKey Mouser LCSC
C12, C13, C22 3 C440C105M5U5TA DigiKey Mouser LCSC
C15, C29 2 DigiKey Mouser LCSC
C18, C19 2 DigiKey Mouser LCSC
C20 1 DigiKey Mouser LCSC
Active Components
DigiKey Mouser LCSC
DigiKey Mouser LCSC
DigiKey Mouser LCSC

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

Related Links

References