Issues with BOM / pick & place file when ordering from JLCPCB about ottercastaudiov2 HOT 6 OPEN

A followup question(s) is regarding the parts that apparently JLC doesn't source and so they must be purchased beforehand.

1. Most of them have LCSC part numbers - I though JLC would order directly from LCSC so any part available on the site was available on JLC? They have a full on partnership
2. Is the expectation that the user (me) would purchase these parts, then ship them to JLC to use as consignment parts for the assembly? I can theoretically assemble everything on this board by hand either by reflowing or with hot air except for the main BGA, but that's the one thing that's difficult to source and must be bought from AliExpress. So how does one coordinate that part shipment and assembly?

from ottercastaudiov2.

Hey, sorry for that! The BOM is a bit out of date. I will update it asap. The missing parts have new JLC part numbers

Most of them have LCSC part numbers - I though JLC would order directly from LCSC so any part available on the site was available on JLC? They have a full on partnership

One would guess that, but sadly this is not true. Those are different warehouses

Is the expectation that the user (me) would purchase these parts, then ship them to JLC to use as consignment parts for the assembly

We have had most parts assembled by JLC, all leftovers were hand-soldered, including the BGA. It is not beginner friendly :/ Maybe you can ask JLC if they can add the Sochip s3 to their warehouse or if they accept consigned parts via AliExpress. They do the latter via Mouser.

from ottercastaudiov2.

No problem - I'm happy to create a PR to update things if you give me the newer BOM info needed, although I'm guessing it's going to be faster/easier for you to just do it since you know the design.

We have had most parts assembled by JLC, all leftovers were hand-soldered, including the BGA

Ah okay so I didn't misunderstand. Wow I'm surprised so many people have been reflowing BGAs by themselves, that's impressive! I'll see what steps are needed to get JLC to assemble the BGA (and ideally the rest of the parts as well). I'll also look into some of the other inexpensive manufacturers that have a bit more flexible of a quote process than JLC (aka they allow you to give them a BOM instead of forcing you through an online upload form).

from ottercastaudiov2.

AliExpress does not ship to China, so it's not possible to dropship the AllWinner BGA straight to JLC. I confirmed with them that they do accept consigned parts and no cost, so theoretically one could order the S3 to their home location, then ship it to JLC.

@Jana-Marie do you have some upcoming time to update the BOM with the correct LCSC part numbers? I would be able to quote a full assembly from PCBCart/PCBWay, who do support ordering parts from multiple locations (although maybe not aliexpress still).

from ottercastaudiov2.

Updated the BOM and POS file, please note that most of the components in your screenshot are actually placed on the bottom side and hence are no errors here. Still JLC added a few more components so the board will come more fully populated :)

Sadly, even though they did have the S3 they don't anymore. So as you noted already, you probably will head to PCBway there. You can also add it after the fact, it might be a bit complicated though

from ottercastaudiov2.

Thanks for the update! It looks like there are still a handful of parts missing from the POS that seem like they should be placed. Here's a list of everything, separated into what I think should be in the POS versus what makes sense to not include:

What isn't included, but I think should be:

• C79: a 10uF cap on the 3v3 input to the HPVCCBP pin of the S3. This component isn't in the design at all, and when I forward changes from the schematic to PCB there is an error that the footprint otter:C_0603 isn't found (there looks like there might be room to stick it in the little grouping of caps C38/C92/C32 on the bottom layer, but then I guess it doesn't need to be in pick and place file)
• U6: SSM2603, audio codec IC. Seems pretty important and has an LCSC number in the BOM. Also in layout on top
• U7: WiFi + BT IC, seems very important, in the layout, and has an LCSC number in the BOM
• C99: same issue as C79 - bypass cap on VCC_PLL in the schematic but not in layout because otter:C_0402 not found (not much room to dive to the bottom with a via here, but it would be do-able probably)
• X1: 26Mhz oscillator for the wifi/bt IC, seems very important, has LCSC number in the BOM, also in layout on top

What isn't included, and it makes sense:

• C49: bypass cap marked DNP, should not be placed
  MK1: microphone - I don't know what mic capabilities this project has but I wouldn't use it anyway
• AE1: KH-5220-A56_U.FL, looks like both an SMD antenna with a u.FL attachment (I don't see that in the LCSC part
  though), on the bottom so should not be in POS file
• C92: 10uF bypass cap on the 1V1 EPHY_VDD net on the S3, on bottom so should not be in POS file
• J1: UART header, not needed, should not be in POS file
• J2: SIM card header, on bottom so should not be in POS file
• J4: USB OTG breakout header, not needed, should not be in POS file
• J5: line in, important but through hole so we don't want assembled, should not be in POS file
• J6: amp out, important but through hole so we don't want assembled, should not be in POS file
• J7: line out, important but through hole so we don't want assembled, should not be in POS file
• J8: SMD RJ45 eth jack, important but on bottom, should not be in POS file
• C32: bypass cap on the S3 DRAM, important but on bottom, should not be in POS file
• C38: bypass cap on the S3 VCC_IO net, important but on bottom, should not be in POS file

from ottercastaudiov2.