FAQ

FAQ

On turn-key jobs, what does Yingstar do about part crossing or substitutions?

First of all, we check your Bill of Materials (BOM), and send you the list of what we suggest to be substituted by local China parts to save cost for you. And we will send you the datasheets of those substitutions for you to check and verify. We will use it after get your approval.

How do you ensure your quality?

Our high quality standard is achieved with the following.
  • All production processes are strictly controlled under ISO 9001:2015 and IPC-A-600/IPC-A-610 standards.
  • State-of-art testing equipments and tools. E.g. Flying Probe, X-ray Inspection, AOI (Automated Optical Inspector) and ICT (in-circuit testing).
  • Dedicated quality assurance team with failure case analysis process
  • Continuous staff training and education

What happens to the leftover components on Turn-Key orders?

We can keep your leftover parts in our inventory for your next order if you think these parts will be used again; or we can ship spare parts with your completed order so you have access to them for troubleshooting and repairs.  

What do I need to send for a turn-key order?

1. Bill of Materials, complete information in excel format. This document should include manufacturer names, part numbers, Reference Designators, component descriptions, and quantities.
2. Gerber Files
3. Centroid Data (AKA Pick and Place or XY-Coordinate Data)
4. Pictures, other requirements or assembly&test instructions if applicable

What is Centroid data?

Centroid data (AI, Pick-and-place or XY data) - This is the machine file, which should include: X, Y, Side of Board (Top or Bottom), and Reference Designator. It is used by our Automated PCB Assembly machines to determine where each part should be located on the board.       Reminder: please set the unit to mm and set the origin point to the bottom left of the design.

What type of payment& payment terms do you accept?

We accept Paypal (for small amount), Western Union and wire transfer. For payment below 3000USD, we prefer full prepayment when order placed. For payment above 3000usd, we accept 50%-60% prepayment when order placed, and the balance should be paid on delivery.
 

Can you offer engineering support to our technical department?

Yes, we can give you engineering support for those problems found during assembly process. All your orders will be receiving a free engineering file review service from our trained and professional technicians.
 

Can you supply sample boards free of charge?

Sorry, we usually do not supply free sample PCBA boards. But 40%-50% of the sample cost can be refunded if the value of your volume order exceeds 20,000 dollars.
 

If I order small quantity first and order large quantity later on, do I still pay setup fee?

Setup cost and E-testing fixture cost are one time charge. There are only applicable to new orders and will be waived if you repeat the order.
 

What kinds of file format do you need?

We can accept Gerber RS-274X, 274D, Eagle and AutoCAD’s DXF, DWG formats.