Electronic Design EN3023 Bedienungsanleitung

Group 1

Controlled

Environment

Monitors

Service Manual ( June 19 )

Group 1 - EN3023 Electronic Design Realization

Contents

Basics....................................................................................................................................................... 3

Product View....................................................................................................................................... 3

Overview ............................................................................................................................................. 3

Display Unit ............................................................................................................................................. 4

Tools........................................................................................................................................................ 4

Warning................................................................................................................................................... 4

Disassembly and Repair .......................................................................................................................... 5

Replacing the Battery.......................................................................................................................... 5

Part Location ................................................................................................................................... 5

Procedure........................................................................................................................................ 5

Opening the Display Unit .................................................................................................................... 5

Closing the Display Unit ...................................................................................................................... 6

Replacing the LCD ............................................................................................................................... 6

Part Location ................................................................................................................................... 6

Procedure........................................................................................................................................ 6

Replacing the Keypad.......................................................................................................................... 6

Part Location ................................................................................................................................... 6

Procedure........................................................................................................................................ 6

Replacing the Buzzer........................................................................................................................... 7

Part Location ................................................................................................................................... 7

Procedure........................................................................................................................................ 7

Replacing the SD Card Reader ............................................................................................................ 7

Part Location ................................................................................................................................... 7

Procedure........................................................................................................................................ 7

Replacing the Switch / LEDs................................................................................................................ 8

Part Location ................................................................................................................................... 8

Procedure........................................................................................................................................ 8

Replacing Printed Circuit Board .......................................................................................................... 8

Part Location Procedure......................................................................................................... 8

Exploded View......................................................................................................................................... 9

Display Unit PCB Layout and Schematics.............................................................................................. 10

Sensor Unit............................................................................................................................................ 11

Parts and Procedures ............................................................................................................................ 11

Group 1 - EN3023 Electronic Design Realization

Tools...................................................................................................................................................... 11

Warning................................................................................................................................................. 11

Disassembly and Repair ........................................................................................................................ 12

Replacing the Battery........................................................................................................................ 12

Part Location ................................................................................................................................. 12

Procedure...................................................................................................................................... 12

Accessing Internal Components........................................................................................................ 12

Replacing the Humidity Sensor / Light Sensor.................................................................................. 13

Part Location ................................................................................................................................. 13

Procedure...................................................................................................................................... 13

Replacing the Switch / LED ............................................................................................................... 13

Part Location ................................................................................................................................. 13

Procedure...................................................................................................................................... 13

Replacing Printed Circuit Board ........................................................................................................ 14

Part Location ................................................................................................................................. 14

Procedure...................................................................................................................................... 14

Exploded Views ..................................................................................................................................... 15

Sensor Unit PCB Layout and Schematics............................................................................................... 16

Group 1 - EN3023 Electronic Design Realization

Basics

Product View

Overview

Controlled Environment Monitors are designed to raise an alarm when surrounding parameters

exceed pre-set thresholds. Unlike household sensors CEM is designed to work off the grid. This

makes it suitable to be used for monitoring closed agricultural environments like propagators and

green houses.

Sensor Unit

Display Unit

Group 1 - EN3023 Electronic Design Realization

Display Unit

Tools

•Clean non-marring work surface

•#2 Phillips screwdriver (magnetized)

•Needle nose pliers

•Soft cloth (to protect removed parts from scratches)

•Screw tray

•Razor knife

•Glue Gun

•Rubbing Alcohol and Cotton Swabs (for removing Hot glue)

Warning

In this manual, graphics or photos are intended to help illustrate procedures or information only,

and may show different levels of disassembly, board colours, configurations than your device.

Group 1 - EN3023 Electronic Design Realization

Disassembly and Repair

Replacing the Battery

Part Location

Procedure

1. Turn off the Display unit

2. Place the Display unit with the LCD screen face down.

3. Rotate the battery cover

4. Disconnect the battery connector and remove the battery

5. Insert new battery (9V Alkaline recommended)

Opening the Display Unit

1. Remove the Battery (see Replacing Battery)

2. Remove the screw on each side

3. Pry open* the top case by holding from the edges

*Warning: DO NOT pull apart the top cover without removing the connectors

4. Disconnect the Keypad connector and LCD connector from the PCB

Group 1 - EN3023 Electronic Design Realization

Closing the Display Unit

1. Connect the Keypad Connector and LCD connector

2. Align the Top cover and press down until it snaps

3. Insert the screws on each side.

Replacing the LCD

Part Location

Procedure

1. Open up the Display unit (See Opening the Display Unit)

2. Press firmly on the LCD and pop it out

3. Pop in the new display

4. Close the Display Unit (See Closing the Display Unit)

Replacing the Keypad

Part Location

Procedure

1. Open up the Display unit (See Opening the Display Unit)

2. Use the Razor Knife to peel off the Keypad

3. Pull out the keypad and Ribbon

Group 1 - EN3023 Electronic Design Realization

4. Insert the new keypad ribbon through the slot in the top cover

5. Apply Glue to the bottom of the keypad and paste it

6. Close the Display Unit (See Closing the Display Unit)

Replacing the Buzzer

Part Location

Procedure

1. Open up the Display unit (See Opening the Display Unit)

2. Disconnect the Buzzer connector

3. Press firmly on the Buzzer and pop it out

4. Pop in the new Buzzer

5. Reconnect the Buzzer connector

6. Close the Display Unit (See Closing the Display Unit)

Replacing the SD Card Reader

Part Location

Procedure

1. Open up the Display unit (See Opening the Display Unit)

2. Disconnect the SD Card Reader connector

3. Use Rubbing Alcohol to remove the glue holding the SD Card Reader in place

Group 1 - EN3023 Electronic Design Realization

4. Slide out the SD card reader

5. Slide in the New SD Card Reader

6. Use a Glue Gun to fix the new SD Card Reader in place

7. Reconnect the SD Card Reader connector

8. Close the Display Unit (See Closing the Display Unit)

Replacing the Switch / LEDs

Part Location

Procedure

1. Open up the Display unit (See Opening the Display Unit)

2. Disconnect the Switch / LED connector

3. Press firmly on the Switch / LED and pop it out

4. Pop in the new Switch / LED

5. Reconnect the Switch / LED connector

6. Close the Display Unit (See Closing the Display Unit)

Replacing Printed Circuit Board

Part Location Procedure

1. Open up the Display unit (See Opening the Display Unit)

2. Disconnect the all connectors (SD Card Reader, LEDs, Buzzer,

Switch )

3. Remove the 4 screws in the corners of the PCB

4. Pull out the PCB taking note of the orientation

5. Place new PCB in the correct orientation

6. Insert the screws and fix the PCB.

7. Reconnect all the connectors

8. Close the Display Unit (See Closing the Display Unit)

Group 1 - EN3023 Electronic Design Realization

Exploded View

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