OHAUS EB SERIES, Service Manual

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CHAPTER 3 REPAIR PROCEDURES
Ohaus Corporation www.ohaus.com 3-8 EB Series Scales Service Manual
3.3.2 Display PC Board Replacement continued
5. Examine the replacement Display PC board and remove all protective plastic film
that may be covering the LCD display.
6. Install the replacement Display PC board with the screws previously removed.
7. Connect the Membrane Switch Cable from the Top Housing to the Display PC
Board and the Ribbon Cable from the Main PC Board to the Display PC Board.
8. Reassemble and test the scale according to Performance Tests in Chapter 4.
3.3.3 LCD Replacement
This procedure is performed when an LCD shows signs of visible damage such as a cracked
glass or partial display and the scale operates normally in all other functions.
NOTE : This procedure is very difficult and should not be attempted unless you have the proper
tools.
1. Perform steps 1 through 4 of Section 3.3.2.
2. Carefully unsolder all contacts of the defective LCD and remove the LCD. All solder
holes on the Display PC board must clean and open to accept the pins of the LCD.
3. Solder all connections, check the Display PC Board and make sure that solder has
not spilled over to other connections. Remove any protective film from the LCD and
replace the LCD.
4. Continue with steps 6 through 8 of Section 3.3.2.