OHAUS TROOPER, Руководство по обслуживанию

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2-9
CHAPTER 2 DIAGNOSIS
SYMPTOM
Scale will not turn on with AC
adapter supplied.
PROBABLE CAUSE
Adapter defective.
DC input connector at rear of
scale is defective.
Membrane switch defective.
Main PC Board is defective.
REMEDY
Check the ac adapter voltage output.
The ac adapter output should measure
12-16 Volts dc. If voltage is low or
nonexistent, replace the ac adapter. If
OK, proceed.
Disconnect the ac adapter. Remove the
6 screws from the bottom cover of the
scale, carefully remove the platform ,
top cover and remove the three flexible
cables from the Main PC board.
Reconnect the ac adapter to the scale.
Check dc voltage at pins 1 and 4 of
connector J8 on the Main PC board.
Should read between 12-16 Volts dc. If
voltage is not present, replace the Main
PC board. See Figure 2-3. If OK, pro-
ceed.
See Table 2-10.
If the scale fails to turn on with a new
membrane switch, the Main PC board is
defective and should be replaced. Re-
place Membrane Switch. -> Repair Pro-
cedures 3.4.
TABLE 2-8 TROOPER COUNT SCALE - WILL NOT TURN ON WITH AC ADAPTER.