China Realhui 3800 8.2MHz EAS RF PCB Mainboard

Common troubleshooting and debugging methods:

A, sensitivity adjustment:
VR4 locator;Small (big clockwise and counterclockwise)

Second, receiving plate automatic detection, manual debugging state:
Automatically detect state: JP1 jump pins 1 & 2 connection (VR2 locator disconnect useless) (factory Settings)
Manual debugging status: JP1 jump needle 2 & 3 connections (VR2 adjustable locator) (small large clockwise and counterclockwise)
1, install door less than 1.2 m: receiving plate set up automatic state;
2, install door is greater than 1.2 m: receiving plate sets manual status;
When set to manual in receiving plate DS1, DS2, DS3 three green light is completely destroyed or fully illuminated and label test antenna without any reaction when need to adjust VR2 locator, usually when counterclockwise regulation (if the adjustment to the reaction time is limit clockwise adjust), the adjusting range is unlimited.Adjust the observation DS1, DS2, DS3 three green light reaction conditions.General regulation for the flickering DS1 DS2 and DS3 will consume can adjust again after VR4 sensitivity (small large clockwise and counterclockwise) make the antenna to achieve good working condition.
The following situation can try manual operation to solve:
1, the label test antenna appear alarm delay phenomenon;
2, hand antenna alarm occurs;
3, antenna used in slight misstatement phenomenon;(it is better to eliminate interference sources)
4, the line board antenna frame for different style, different manufacturers appeared alarm effect is poor;
Note: in the practical application of no accurate definition, flexibility to use two kinds of state;Choose systems work best.
Third, the scene there is interference appears false positives, and can't find or cannot be ruled out interference:
Try the following methods:
1, increase or reduce emission plate frequency sweep width R14 (large clockwise and anticlockwise small) appropriate receiving plate sensitivity adjustment.
2, will receive plate adjustment for manual work status.
3, shade the receiving antenna lateral metal plate.

Four, antenna appear alarm delay phenomenon:
1, increase or reduce emission plate center frequency.
2, increasing or reducing emission plate frequency sweep width.
3, will receive plate adjustment for manual operation.
4, use the poor quality of tag.
Five, there was a problem online job elimination method:
1, check the stand or fall of online line, check whether online line wiring loose or wrong, check the fire board, vice launch set the switch is set correctly.
2, switch the main and vice.
3, online line to a switch.
4, adjust the transmission power VR23 (small clockwise and counterclockwise)
online single door installation should be no greater than 90 cm and thread specification of the system should be not less than 0.5 square of two core shielded wire.