SB5XXX LDO Item Test Fail

Pin-Jet helped the customer determine why the LDO item failed

The customer gave the feedback that the LDO item failed easily; after manual testing, it was confirmed that it passed stably with no LDO item fails. After Pin-Jet aligned with the customer, problems with the LDO item occurred easily when contact mool was used; after confirming, it was found that the reason was because the customer had insufficient clamp force, which caused poor contact.

Problem Description

 ✔ Incident: Yi SB5XXX LDO Item Test Fail
 ✔ Target: Solve the part tested to be abnormal

Problem Confirmation

 ✔ Pin Mark Check → PASS

 ✔ FDR Check → PASS

 ✔ Accessory combination tolerance Check → PASS

On-site Verification Cover test / Contact test:

 ✔ Cover Test Loop 20次 → PASS

 ✔ Contact Test → Fail

Design Experiments and Verify Implementation

Purpose: Verify the mismatch between the spring inside the feedback clamp and the socket force, and improve the contact test so that it can pass stably.
Method: Change the original 3.52KG spring to a 4KG spring and verify the contact.

Experiment conditions:
1. By Corr Sample experiment using the same site
2. Use 3.52KG for Arm 1 Clamp
3. Use 4KG for Arm 2 Clamp

 ✔ Use the original 3.52KG spring for Arm 1:
 ✔ Install the 4KG spring for Arm 2 and verify that the loop passed 20 times stably:

Conclusion: It was confirmed that the contact test could pass stably after replacing with a 4KG spring.