OHAUS TROOPER, Руководство по обслуживанию

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3-7
CHAPTER 3 REPAIR PROCEDURES
3.5 REPLACING THE TROOPER COUNT SCALE MAIN PC BOARD
NOTE
: Do not attempt this procedure unless you have the Trooper Count Scale Tools program.
The Main PC Board is located inside the scale towards the front. To replace the Main PC Board, it is
necessary to disassemble the scale. After replacement, use the OHAUS TROOPER COUNT SCALE TOOLS
program to enter data into the EEPROM.
1. Perform steps 1 through 4 of section 3.4.
2. Remove the connector plugs from connectors J7, J8 and J10 from the Main PC Board which
is the battery, external power wires and Load Cell. See Figure 3-4.
Figure 3-4. Trooper Count Scale Main PC Board Connector Locations.
3. Carefully remove the wires coming from J6 which is the RS232 connector. See Figure
3-5 for wire color and locations.
4. Remove the four corner screws on the Main PC Board
5. Replace the Main PC Board and install the four screws previously removed.
6. Replace the color coded wiring for connector J6. Check color coded wiring is correctly
installed.
7. Replace the connectors to J7, J8 and J10 on the Main PC Board.
8. Position the upper housing in place over the scale and connect the flexible cables from the
membrane switch to connectors J2, J3 on the Main PC board and the cable from the display
PC board to connector J4.
9. Check that the LFT lock switch is in the unlocked position.
J6
J2 J3
J8
J7
J4
J10
TO LOAD CELL
1
2
3
GND
RXD
TXD
TO RS-232
TO BATTERY
TO EXTERNAL POWER
TO MEMBRANE
SWITCH
UNLOCK
LFT LOCK SWITCH
CAUTION
THE TROOPER COUNT SCALE PC BOARD WILL NOT OPERATE
UNLESS THE TROOPER COUNT SCALE TOOLS PROGRAM IS USED.