Static Test and Scheme Rectification of Set-top Box
Test and rectify products: set-top box;
Temperature and humidity of Leimao laboratory: 26 degrees, 61%;
Objective: Rectify and test the set-top box to discharge 2KV through electrostatic contact.
1. Test the customer's product boards as follows:
Second, the Leimao circuit protection scheme:
Third, test the set-top box photos and data records:
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Test phenomenon |
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Contact discharge2KV |
Screen flower screen |
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Lightning strikes 3KV 1-2 line V. |
Bad network port estimation |
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joggle/interface |
Recommended lei Mao model |
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Power port |
SMBJ15CA |
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audio interface |
SD12C |
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Usb interface |
ESDA05CPL |
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network interface |
LC03CI、SMD4532-090NF |
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HDMI interface |
ULC0524P |
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Video interface |
P0080SA |
Replace the Lei Mao device, discharge the electrostatic level, and the contact can reach 2KV without a screen, but there will still be a screen within 10 times at 4KV.
Using devices with high electrostatic level can improve the electrostatic protection ability, but the effect is limited. It is suggested to replace the devices and redesign the floor at the same time.
The surge design scheme is defective, so it is suggested to upgrade the lightning protection design and adopt multiple GDT protection.
Leimao Electronic emc lab provides free testing, scheme rectification and reference circuits for peripheral electrostatic protection. Leimao test equipment is available for customers to test for free. Please feel free to contact Hu Gong at 18016225001.