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X-631 Wheel Aligner Product Service Manual Hardware
2-14
Communication Module
Note:
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Working frequency 433MHz; transmission rate 9600bps
，
8 data digits, 1 stop digit;
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When the probe rod receives the signal from the other working with the same frequency, the green indicator
will flash, and the red indicator starts flashing when pressing the key-press, and the probe rod will transmit the
data;
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Working voltage 5V; standby voltage should be less than 2.5V; communication distance should be less than
15
m.
Charging Control
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The probe rods are charged by Lithium battery standard charging circuit consisting of “bq2057” chip;
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Start maximum charging current is 600mA, and end charging voltage is 8.4V;
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Constant current charging is adopted in the first half, and constant voltage in the second half.
Main chip (ATMEGA128L) Address Code
The main control chip adopts high speed AVR single-chip manufactured by ATMEL:
LF, RF, LR and RR probe rods are distinguished according to the different address codes written inside the chip. The
address consists of three-digit double-byte hexadecimal number: XX XX XX. Special PC software is required to modify it.
Testing for Main-board Circuit
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Charging circuit
Emitter indicator
Receiver indicator
Spring antenna
Working voltage 5V
