🧐 Introduktion
Hvis du køber mobile LCD-skærme på Kinas travle offline markeder som Shenzhens Huaqiangbei, du træder ind i en guldgrube af muligheder - og landminer af risiko.
Offline tilbud kan tilbyde uovertrufne priser, øjeblikkelig opgørelse, og eksklusive modeller. Men med nul afkast og hurtige kontanttransaktioner, selv en defekt batch kan udslette din margen.
Derfor holder professionelle købere sig altid til en standard betjeningsprocedure (SOP). Lad os lede dig gennem en detaljeret, felttestet 15-trins SOP brugt af de bedste i branchen – plus en tjekliste, der kan downloades, du kan have med dig.
📦 Forstå vigtigheden af LCD-skærminspektion
En dårlig batch kan føre til snesevis af kunderetur. Værre? Det kan ødelægge dit brands omdømme.
På markeder som Kina, hvor renovering og falske komponenter er almindelige, du kan ikke stole på sælgerløfter. Du er nødt til at inspicere som en professionel.
🔍 Hvad er en inspektions-SOP?
An SOP (Standard betjeningsprocedure) er en trin-for-trin inspektionstjekliste, der bruges af erfarne indkøbsagenter. Det sikrer sammenhæng, nøjagtighed, og beskytter dig mod lyssky leverandører.
Uden en, du gætter bare.
🧰 Før du begynder – Forberedelsestips
Før du går ud for at inspicere LCD-skærme:
- Medbring værktøj: LCD skærm tester, lommelygte, mikrofiber klud, handsker, multimeter
- Apps: Sensor test apps, vise test-apps, stregkodescannere
- Leverandører: Bekræft aftaler på forhånd
- Udskriv tjekliste: Or save a digital version on your phone/tablet
✅ The 15 Must-Do Inspection Steps
1. Inspect Outer Packaging
Se efter:
- Torn seals
- Water damage
- Mixed-label boxes
If the packaging looks reused, be cautious.
2. Check for Correct Labeling
Verificere:
- Model number
- Manufacturer code
- QR codes / barcodes
Some high-end suppliers include anti-fake codes. Scan them!
3. Count and Cross-Check Quantity
Always check quantity against purchase order before unsealing. Mistakes happen — or are made to happen.
4. Check Frame and Corners
- Look for cracks, buler, or poor finishing
- Press gently to check for weak adhesive areas
5. Examine the Backlight
Power it on to inspect:
- Uniform brightness
- No dark spots, bleeding, eller flimrende
6. Check the Flex Cable (FPC)
- Should be clean, gold-plated
- Part number should match model
- No signs of soldering or glue residue
7. Inspect Polarizer Film
Tilt it under light:
- Should be perfectly smooth
- No haze, rainbow, or bubbles
8. Cleanliness and Dust Particles
Use a flashlight at an angle:
- Dust inside? It’s been reopened or handled poorly.
9. Display Test on Real Device or Fixture
Run these tests:
- Full white, rød, grøn, blue screens
- Look for line issues, døde pixels, ghosting
10. Touch Screen Sensitivity Test
Use a touch-diagnosis app or draw lines:
- Any skips or jittery lines = faulty digitizer
11. Light Sensor and Proximity Sensor Check
Make a call and cover the top sensor:
- Screen should go black
- Use Sensor Box app or similar
12. 3D Touch / Fingerprint Sensor (hvis det er relevant)
High-end screens (f.eks., iPhones, Samsung) require:
- Fingerprint ID test
- Pressure sensitivity test
13. Power Consumption Monitoring (Optional)
Use a USB amp meter:
- Excessive power draw = inefficient or fake components
14. Confirm Warranty and Replacement Terms
Ask clearly:
- How long is the test period?
- What’s the return rate or refund policy?
Get it in writing or record audio (with consent, if legal).
15. Sign-off and Record Keeping
- Log each batch: model, mængde, test result
- Snap photos of each batch
- Get a signed copy from supplier if possible
🎯 Conclusion
Offline screen sourcing in China is a high-stakes game — but the pros win by inspecting like machines and negotiating like humans.
This 15-point SOP ensures you’re not just buying a screen, but investing in a quality product that won’t come back as a return.
Print it. Use it. Stick to it. And you’ll walk away with profits, not problems.
❓FAQs
1. What if I don’t have professional tools on-site?
Use basic tools first. Many suppliers offer testing stations for free. For bulk purchases, never skip real device testing.
2. Can I trust suppliers in Huaqiangbei or similar markets?
Yes — but only the reputable ones. Use SOPs, record everything, og build relationships.
3. How do I spot refurbished screens passed off as new?
Look for solder marks, mismatched flex cables, and scratched polarizers. Run detailed sensor tests.
4. Is it okay to inspect only samples?
Ingen. Sample might be real, the bulk might not be. Test every screen or at least sample from every tray.
5. Can I outsource the inspection to third-party agents?
Absolut. There are many QC service providers. Just ensure they use a detailed SOP like this one.
