MANUFACTURING / ELECTRONICS INTEGRATION
From the board to the product, with a defined manufacturing route.
Xinyinhai provides in-house electronics development and SMT assembly for electronic toys, interactive products and plastic products with electronics. Planned maintenance, internal training, automatic printing and inspection gates support consistent execution.
Start with the function you need and the board information you have. We review the board, housing, assembly and testing requirements together, then agree the project scope.
SMT — Surface Mount Technology places components on a board.
PCB / PCBA — A printed circuit board / a board with components assembled.
AOI — Automated optical inspection checks visible assembly features.
01 / DOCUMENTED PROCESS
Printing and placement variation can travel downstream. The workshop board puts checks between operations and shows where a rejected board goes, including cleaning, correction and AOI reinspection.
PCB intake and appearance inspection.
Appearance issue → IQC dispositionRed adhesive where shown, then automatic solder-paste printing.
Inspect each print operationComponent placement followed by pre-oven QC.
Exception → technical improvementSet parameters for the paste and PCB requirements.
Setup → parameter recordAOI on the single-sided and double-sided B routes.
Reject → repair → Return to AOIRack the boards for the next route or assembly handoff.
Double-sided A continues to BThis overview summarizes the archived workshop routes. Red-adhesive printing and curing apply where shown. The detailed route, inspection coverage and current work instruction are reviewed for each board.
Includes the red-adhesive branch and post-reflow AOI.
After racking, continue to double-sided B. No separate AOI gate is drawn on A.
Begins at the board feeder. No red-adhesive print step is drawn on B.
| Route | Decision | Action | Return / onward path |
|---|---|---|---|
| Single-sided | PCB appearance inspection | Notify IQC for disposition | No return is drawn |
| Single-sided | Adhesive-print inspection | Wash the board | Screen-print red adhesive |
| Single-sided | Solder-paste-print inspection | Wash the board | Screen-print red adhesive |
| Single-sided | Pre-oven QC inspection | Notify technical staff for improvement, then assess correction | No return is drawn |
| Single-sided | Correction assessment — correction accepted | Proceed to reflow soldering / curing | Reflow soldering / curing |
| Single-sided | Correction assessment | Remove the already placed components, then wash the board | Screen-print red adhesive |
| Single-sided | AOI inspection | Repair | AOI inspection (reinspection) |
| Double-sided A | PCB appearance inspection | Notify IQC for disposition | No return is drawn |
| Double-sided A | Adhesive-print inspection | Wash the board | Screen-print red adhesive |
| Double-sided A | Solder-paste-print inspection | Wash the board | Screen-print red adhesive |
| Double-sided A | Pre-oven QC inspection | Notify technical staff for improvement, then assess correction | No return is drawn |
| Double-sided A | Correction assessment — correction accepted | Proceed to reflow soldering / curing | Reflow soldering / curing |
| Double-sided A | Correction assessment | Remove the already placed components, then wash the board | Screen-print red adhesive |
| Double-sided B | Solder-paste-print inspection | Wash the board | Load the board feeder |
| Double-sided B | Pre-oven QC inspection | Notify technical staff for improvement, then assess correction | No return is drawn |
| Double-sided B | Correction assessment — correction accepted | Proceed to reflow soldering / curing | Reflow soldering / curing |
| Double-sided B | Correction assessment | Remove the already placed components, then wash the board | Load the board feeder |
| Double-sided B | AOI inspection | Repair | AOI inspection (reinspection) |
Source: archived SMT production workshop board, single-sided and double-sided A/B diagrams. On single-sided/A, both adhesive- and solder-paste-print rejects wash and return to red-adhesive printing. On B, a paste-print reject returns through the board feeder. AOI rejects are repaired and returned to AOI for reinspection.
Technical documents → board checks → print and placement checks → post-oven appearance → depaneling → packaging → ERP warehouse entry.
| Node | Object / activity | Accepted / normal flow | Exception path |
|---|---|---|---|
| Prepare process technical documentation | Process documents | PCB appearance inspection | No exception is drawn |
| PCB appearance inspection | PCB appearance | PCB installation inspection (OK) | Return to warehouse (NG) |
| PCB installation inspection | PCB installation | Screen-print inspection (OK) | Return to warehouse; the condition is not labelled and cannot be stated as NG |
| Screen-print inspection | Screen-print result | Component placement inspection (OK) | Return to warehouse (NG) |
| Component placement inspection | Component placement | Post-oven QC appearance inspection (OK) | Correct / adjust (NG) |
| Post-oven QC appearance inspection | Post-oven board appearance | Confirm depaneling result (OK) | Correct / adjust / return to warehouse (NG) |
| Confirm depaneling result | Depaneling result | Packaging (OK) | Feed back to IQC (NG) |
| Packaging | Packaged boards | ERP warehouse entry | No exception is drawn |
| ERP warehouse entry | Warehouse entry | End of documented chart | No exception is drawn |
The PCB-installation branch returns to the warehouse, but its condition is not labelled. The quality chart sends print rejects to the warehouse; the workshop routes show washing and reprinting. These remain separate references. Their applicable conditions require project review.
Source: archived SMT production quality-control chart. No additional recheck loop is drawn here. ERP warehouse entry is the stated final node.
02 / AUTOMATIC SOLDER-PASTE PRINTING
The automatic printer reduces reliance on hand printing. Operators still prepare the setup, add paste, confirm the print and arrange repairs. The aim is repeatable execution with visible quality decisions.
Start DSA control software and verify the system.
Set width, align the stencil and prepare cleaning and paste.
Run the automatic solder-paste printing operation.
Check the print result before continuing production.
Self-check failsPower off → technical repair → restart from power on
Print result failsFine-adjust stencil → confirm print quality again
Cleaning frequency is set during preparation; the source supplies no fixed interval. DSA is the control-software label used in the archived diagram. The job’s paste, stencil and setup requirements determine the applicable settings.
Source: standalone automatic-printer flow. The workshop-board version ends with transfer to the placement machine and does not separately draw the cleaning-paper/frequency step.
If the board does not fit, return to widening or narrowing the rail.
A failed self-check leads to power-off and technical repair, then a restart. A failed placement confirmation returns to placement-coordinate setup.
The same self-check repair/restart and print-adjustment/reconfirmation paths are drawn. This separate version has 10 steps and ends in board transfer.
03 / EQUIPMENT MAINTENANCE & 5S
Equipment wear, dirt and disorder can affect execution. The preventive maintenance plan identifies equipment, parts and cycles. Training also addresses workplace organization and careful material handling.
Printing, placement, reflow and optical inspection.
Separate process categories; these are not mandatory steps for every SMT board.
Plan status: monthly items are planned each month; half-yearly work is planned in June and December; annual work in December. The source year is blank and all implementation cells are blank. This is a maintenance plan; current condition, completion and availability are confirmed during production planning.
| Equipment | Planned item | Cycle | Planned months |
|---|---|---|---|
| Pick-and-place machine | Body sheet metal | Monthly | Every month |
| Pick-and-place machine | Nozzle / prism | Monthly | Every month |
| Pick-and-place machine | Rails | Monthly | Every month |
| Pick-and-place machine | X/Y/R/Z axes | Half-yearly | June and December |
| Pick-and-place machine | Overall maintenance | Annually | December |
| Reflow oven | Body sheet metal | Monthly | Every month |
| Reflow oven | Internal cleaning | Monthly | Every month |
| Reflow oven | Chain lubrication | Monthly | Every month |
| Automatic solder-paste printer | Body sheet metal | Monthly | Every month |
| Automatic solder-paste printer | Rail maintenance | Monthly | Every month |
| Automatic solder-paste printer | Lead-screw maintenance | Monthly | Every month |
| Automated optical inspection system | Body sheet metal | Monthly | Every month |
| Automated optical inspection system | Camera-lens cleaning | Monthly | Every month |
| Automated optical inspection system | X/Y-axis cleaning | Monthly | Every month |
| Automated optical inspection system | Rail screw-hole cleaning | Monthly | Every month |
| Automated optical inspection system | Positioning rail | Monthly | Every month |
| Bonding machine | Body sheet metal | Monthly | Every month |
| Bonding machine | Internal cleaning | Half-yearly | June and December |
| Bonding machine | Rail maintenance | Half-yearly | June and December |
| Bonding machine | Overall maintenance | Annually | December |
| Die-bonding machine | Body sheet metal | Monthly | Every month |
| Die-bonding machine | X/Y-axis worktable | Monthly | Every month |
| Die-bonding machine | Dispensing valve | Monthly | Every month |
| Encapsulation dispensing machine | Body sheet metal | Monthly | Every month |
| Encapsulation dispensing machine | X/Y axes | Monthly | Every month |
| Encapsulation dispensing machine | Dispensing valve | Monthly | Every month |
Source: archived annual SMT and bonding maintenance plan. Part-only entries remain part names; they do not imply a specific replacement or calibration action. “Nozzle / prism” normalizes the source spelling. The precise bonding-machine subtype is not specified.
Training connects sorting, orderly placement, cleaning, standardization and discipline to the work area. Storage examples and maintenance planning support that approach; they do not by themselves document a completed 5S audit.
The plan also lists changes in people, methods, materials and machines. Recognizing a change helps identify what must be checked before the next run.
A separate note covers water, electricity, oil, air and materials. These five leak categories are distinct from 5S workplace organization.
FACTORY EVIDENCE / ARCHIVED WORKSHOP BOARD
Selected, de-identified photo crops from the supplied workshop board. These show documented details; current equipment configuration is confirmed for the project.
04 / TRAINING, STANDARD WORK & RECORDS
Xinyinhai conducts internal SMT training. The reviewed materials provide topics and methods for recognizing risks, following setup instructions and reporting abnormal results.
| Training topic | Related operation | Risk addressed | Document / check basis |
|---|---|---|---|
| Component identification & orientation | Read component markings, package form and placement direction. | Wrong component, inverted placement or incorrect orientation. | Training references; apply the approved BOM, placement drawing and product-specific instruction. |
| ESD handling awareness | Recognize electrostatic discharge (ESD) risks when handling electronic parts and boards. | Damage that may not be visible at the assembly stage. | Training references; define the handling controls required by the components and project. |
| 5S workplace organization | Organize materials, tools and board storage; keep the work area clear. | Mix-ups, contamination and avoidable handling damage. | Training references and archived workshop storage examples; agree identification and storage rules for the job. |
| Solder paste & stencil preparation | Understand paste condition, stencil identity, apertures, alignment and cleanliness. | Uneven deposits, bridging and insufficient solder. | Documented printer setup and print-quality confirmation; paste and stencil criteria are project-specific. |
| Material loading & changeover checks | Compare the material and feeder position with the intended placement. | Wrong material, missing components and placement errors. | Training references; the workshop board documents component preparation, feeder loading and placement confirmation. Detailed changeover checks follow the applicable work instruction. |
| Equipment operation & maintenance awareness | Understand setup, self-checks, fault escalation and the planned maintenance items. | Continuing with an unsuitable setup or unresolved equipment fault. | Workshop startup diagrams, printer fault routes and the preventive maintenance plan. |
| Reflow process awareness | Relate the thermal process to solder paste and the PCB requirements. | Poor wetting, open joints and other thermal-process defects. | Workshop board: supervisor setup before production, followed by a setup-parameter record retained in the workshop. |
| Defect identification & feedback | Recognize defect types and discuss possible causes consistently. | Confusing symptoms with verified causes or passing unresolved defects forward. | Training fishbones and documented QC/AOI exception routes; investigation is required to establish a cause. |
The workshop board requires the supervisor to set parameters before production according to the solder-paste type and PCB thickness and size. After each setup, the parameters are recorded in the reflow-oven setup-parameter record and retained in the workshop.
This is a documented requirement. No completed setup record is reproduced here, and historical temperature examples are not presented as a universal production profile.
Training references are consolidated from the supplied materials, including general and third-party teaching content. They are evidence of training topics, rather than completed sign-ins, assessments, certification or measured defect reduction. Material-change checks and stencil identity/status checks are useful project-specific standard-work controls; their exact instruction and record format are agreed for the job.
See the wider Inspector Training framework05 / VISUAL DEFECT ANALYSIS
Visual examples give operators and technical staff a shared vocabulary. The eight training fishbones organize potential causes for discussion; investigation and verification are still needed to identify a root cause.
Upside-down placement · displacement · poor wetting · open joint · bridging · missing component · tombstoning · component on its side
The source’s branch arrangement is preserved: Environment, People and Materials above; Methods and Equipment below, each in its original left-to-right order. The backbone points right. Use horizontal scrolling or the image viewer to inspect the diagram; all factors are also listed below it.
One source factor concerning the PCB has unclear wording. Its intended cause is not inferred.
English derivatives of the eight supplied training diagrams, in original slide order. Their labels describe potential causes rather than factory incidents, verified root causes or improvement results. Sample photos are de-identified teaching details.
06 / ELECTRONICS INTEGRATION
Board assembly is one part of an electronic product. Housing fit, connectors, wiring, controls and functional requirements need to be considered together before the finished-product route is set.
Review the intended interaction, power, interfaces, board information and acceptance criteria. Agree electronics design, firmware and sourcing responsibilities for the project.
New Product Development ↗Coordinate board mounting, enclosure features, wire paths and the required assembly operations, including fastening or hand soldering where applicable.
Tooling & Injection Molding ↗Assembly & Packaging ↗Define function and test requirements for the finished product. Board AOI supports the assembly checks; finished-product function and acceptance need their own criteria.
Product Testing ↗Quality Control Process ↗BUYER QUESTIONS
Clarify the board, the finished-product requirements and the responsibilities to assess during the project review.
Xinyinhai offers in-house electronics development and SMT assembly within its plastic and electronic product manufacturing route. Electronic toys, interactive products and plastic products with electronics are assessed against the board, enclosure, function and assembly requirements. The design, firmware, component sourcing, testing and delivery responsibilities are agreed for each project.
The documented route uses an automatic solder-paste printer. Operators set the rails, stencil and squeegee, load cleaning paper and paste, confirm the print, and escalate faults. Automated printing is intended to reduce variation from manual printing; setup and quality decisions remain necessary.
It documents planned items and cycles for seven equipment categories. Monthly items are planned each month, half-yearly items in June and December, and annual items in December. The source has no year entered and its implementation columns are blank. Current machine condition, maintenance completion and production scheduling are confirmed during project review.
The workshop routes show PCB appearance, adhesive-print and solder-paste-print inspection, pre-oven QC and AOI. AOI is shown after reflow for the single-sided route and double-sided B; double-sided A proceeds to racking and the B route without a separate AOI gate. A separate quality-control chart also covers installation, placement, post-oven appearance, depaneling, packaging and ERP warehouse entry.
The workshop board documents separate single-sided and double-sided A/B routes. Red-adhesive printing and curing are retained where shown. The appropriate route and inspection coverage depend on the board and product; these archived diagrams are reviewed against the requirements of a new job.
Xinyinhai conducts internal SMT training. The materials cover component orientation, ESD, 5S, printing, loading, equipment, reflow and defects. They describe training topics rather than completed assessments. The workshop board requires a reflow setup-parameter record after each setup and retention in the workshop. Record formats, availability and other project-specific checks are agreed during review.
A PCB is the printed circuit board; a PCBA is the board with components assembled onto it. Integration planning connects the PCBA to the plastic housing, mounting points, wiring, switches, outputs and functional checks. The assembly route and test requirements are defined for the product, with the existing assembly and quality processes providing the next handoff.
Share the project stage, function and test requirements, target market and quantity. Include a BOM, PCB/Gerber data or information about an existing board when available. A concept project can start with a functional brief; a repeat build needs the applicable files and references. MOQ, lead time, sourcing and delivery scope are assessed for the actual project.
START WITH THE INFORMATION YOU HAVE
Share the function, test requirements, quantity, target market and project stage. Include a BOM, PCB/Gerber files or information about an existing board when available.
Use the inquiry form to prepare your brief, or share it with your existing project contact. Agree a confidential exchange before sharing restricted board files. Downloading the brief does not submit an inquiry. MOQ, lead time, current equipment availability and delivery scope require project review.
