OHAUS DISCOVERY BALANCE, Руководство по обслуживанию

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CHAPTER 3 REPAIR PROCEDURES
3.1.2 Display PCB Removal & Replacement
To remove the Display Printed Circuit Board (PCB), proceed as follows:
1. Open the Housing, as explained in Section 3.1.1.
2. Tip balance onto back. Remove the 2 screws holding Display Housing assembly to
back plate of balance.
Figure 3-8. Removing screws to separate
Display Housing from bottom of balance.
3. Display Housing will still be connected by a cable to the balance assembly.
Remove the 4 screws on the bottom of the Display Housing, and remove the cover of
the Display.
4. Disconnect the interconnecting cable from the Display PCB.
5. Remove the 6 screws securing the Display PCB, and lift out the PCB.
CAUTION:
WHEN HANDLING THE PRINTED CIRCUIT BOARD, HANDLE BY EDGES ONLY! DO
NOT TOUCH FOIL SIDE OF BOARD. STATIC DISCHARGE MAY DAMAGE SOME
COMPONENTS.
To
replace the Display Circuit Board, proceed as follows:
6. Replace the Display PCB with a new board and install the 6 securing screws.
7. Re-connect the interconnecting cable to the replacement Display PCB.
8. Replace the housing cover of the Display and insert the 4 screws on the bottom.
9. Install Display assembly to balance: tip balance up and insert 2 screws on the
bottom.
10. Replace balance cover, performing Housing Disassembly in reverse order.
11. Check balance performance and perform Span Calibration: See Appendix A.2.
Ohaus Corporation www.ohaus.com 3-6 Discovery Balance Service Manual