¶ Fault phenomena
When using AMS lite, you may encounter problems that AMS lite is not detected by the printer. It can be divided into the following two situations:
- AMS lite failed to power on. After the printer is powered on, the AMS lite failed to power on. The lights in all four slots did not light up, and the AMS page was not displayed on the screen. Under normal circumstances, if the four slots of the AMS lite are not filled with filaments, the four indicator lights should flash in turn.
- The AMS lite communication is lost. After the printer is powered on, the printer and AMS lite start normally, but the communication between the printer and AMS lite is lost. The four slots of the AMS lite are all blinking red, and the AMS page is not displayed on the printer screen.
If you encounter either of the above conditions, you can refer to the methods in this article for troubleshooting.
¶ Troubleshooting
¶ AMS lite failed to power on
¶ Measure the voltage of the printer interface
1. After turning on the printer, measure whether the output voltage of the two pins of the printer's 4-pin port is approximately 24V, as shown in the following figure. The printer has two 4-pin ports. If the measured voltage is 24V, but the AMS lite still cannot be powered on successfully, please jump to the Measure the resistance of AMS lite section of this article.
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2. If the output voltage of both interfaces is not 24V, if you are using an A1 printer, the cable inside the printer may be loose. Please turn off the printer, disassemble the bottom cover of the printer, and check whether the connection cables from the printer mainboard to the interface board are tightly plugged in (A1 mini users can skip this step).
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Unscrew the printer bottom cover |
Check whether the connection cables from the printer mainboard to the interface board are tightly plugged in |
Diagram of cables not plugged in tightly |
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3. If the 24V voltage still cannot be measured after the cables are plugged in tightly, you can click here to open a new ticket in our Support page, and provide us with specific measurement values for further analysis.
¶ Measure the resistance of AMS lite
Please unplug the 4-pin cable connecting the AMS lite to the printer, and power off the AMS lite for more than 1 minute. Then, measure the resistance value of the 4-pin cable of the AMS lite. If the following measurement results are abnormal, it indicates that the AMS mainboard is faulty:
- R4 short circuit or its resistance is small (< 500Ω)；
- D/C point is open circuit to other points;
The 4-PIN cable connector is shown as follows:
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The normal resistance values between each two points shown in the figure above are shown in the table below:
| Resistance |
R1 |
R2 |
R3 |
R4 |
R5 |
R6 |
| Value |
320Ω |
130KΩ |
2.7KΩ |
130KΩ |
2.7KΩ |
130KΩ |
¶ The AMS lite communication is lost
Refer to the above steps to measure the resistance values of the AMS lite through the 4-pin cable. If the measured resistance is abnormal, the AMS mainboard is faulty, resulting in the AMS communication loss.
If these resistance values are in the normal range, if you are using an A1 printer, follow the steps above to remove the bottom case of the printer, reinsert the cable connecting the mainboard to the interface board, and try again.
If the problem persists after re-plugging the cable, or if you are using an A1 mini printer, it is likely that the printer's mainboard is faulty and needs to be replaced. Please provide the measured resistance value and click here to open a new ticket on our Support page.