Synel SY-760, Руководство пользователя

Страница: 52 / 106

-
50
2 Calibrating the Real Time Clock (RTC)
If your terminal gains or loses time, you will need to calibrate it using a Time Counter unit, which has
at least 5 places to the right of the decimal point (100,000ths of a millisecond).
1. Unplug the terminal and make sure that it is OFF. The backup battery automatically supplies
power for approximately 15 seconds.
2. Unscrew and remove the front panel.
3. Remove the JP12 jumper. This disables the Watchdog utility.
4. Plug the terminal into a power source and enter the technician mode.
5. Make sure that the Time Counter is unplugged.
6. Connect the ground of the Time Counter unit to the ground pin at TP2 of the terminal’s CPU
board.
7. Reposition JP13 to 2-3 (calibration).
8. Connect the input of the Time Counter unit to the pin in JP13 marked jumper 2.
9. Plug the Time Counter unit into a power source.
10. Set the Time Counter unit to test the period.
11. Press once on Enter; the message "Adjust RTC N/Y" appears.
This operation must be performed by qualified and authorized personnel only!
When working with an open unit, make sure to unplug the unit wherever the instructions call
for it. Take extreme care during the stages where the terminal is plugged into a power
source. Failure to heed this warning may result in harmful contact with electrical current.