If a lighting board has failed and the original files are gone, a lighting PCB copy rebuilds manufacturable data from the physical board — copper layers, drill data, silkscreen, BOM, and a schematic if you need one. Send photos and the board, and you get a feasibility answer, a lead time, and a price. Most single- and double-sided LED fixture boards are straightforward. The parts that need thought are the driver, the controller firmware, and the potting.
Which lighting boards actually come through the door
Lighting is a broad category, and the boards behave nothing alike. Grouping them honestly matters, because the effort curve is completely different.
- LED light engines and module boards. Aluminum-backed or FR-4, single-sided, wide copper pours, arrays of identical footprints. Usually the easiest class of board to duplicate accurately.
- Constant-current drivers. Two- or four-layer boards with a switching converter, an isolation barrier, an opto or digital isolator, X/Y capacitors, and a flyback or buck-boost magnetic. Copper geometry here is functional, not cosmetic.
- Dimming and control boards. 0–10V, DALI, DMX512, TRIAC-dimmer front ends, or wireless nodes. These almost always carry a microcontroller with code in it.
- Stage, architectural and horticultural controllers. Four to eight layers, mixed signal, sometimes a small CPLD, often long out of production with the OEM gone or unresponsive.
- Street and high-bay fixture boards. Heavy copper, surge protection stages, conformal coating or full potting.
Tell us which of these you have in the first message. It changes the quote more than the board size does.
What the engineer is actually doing to your lighting board
The work runs in a fixed order, and each stage feeds a check on the one before it.
1. Intake and documentation
The board is photographed as received, both sides, with component markings legible. Every reference designator on the silkscreen gets logged. If the silkscreen has been scorched by a failed FET or a shorted electrolytic, we note what is unreadable now rather than guessing later.
2. Component identification
Passives get measured off-board where the value isn’t printed — LCR meter for inductors and MLCCs, curve trace for diodes and transistors when the top marking is a two-character house code. Lighting boards are full of house-marked parts: the current-sense resistor, the switching controller, the LED driver IC itself. Some of those resolve from the marking plus package plus pinout behavior. Some don’t, and we say so.
3. Optical scan and copper recovery
Both outer layers are scanned at high resolution and aligned to each other using the plated holes as reference features. Traces, pours, thermal reliefs, and pad geometry are vectorized. On an aluminum-substrate LED board, the dielectric thickness and the copper weight matter as much as the trace outline, so those get measured directly.
4. Inner layers, if there are any
A four-layer dimming controller needs the internal planes imaged. That means controlled removal of the outer layers on a sacrificial sample, or X-ray where a plane split needs to be confirmed without destroying the only board you have. This is the single biggest jump in cost and time — going from two layers to four is not a 2x change in effort.
5. Netlist, then verification
The extracted netlist is checked point-to-point against the physical board with a meter. On a driver board, the isolation barrier gets special attention: primary-side and secondary-side nets must not be shorted anywhere in the recovered data, and the creepage and clearance distances in the copy must match the original, not the minimum a CAD tool will allow. That’s where the difference between a copy and a redraw becomes something you can feel in the field.
6. Output generation and first article
Gerbers, drill file, stackup notes, BOM, pick-and-place if you’re assembling. Then a bare board and, when you want it, an assembled unit tested against the original: input voltage range, output current regulation, dimming curve at 10%, 50% and 100%, and thermal behavior on the LED pad at full load.
What makes lighting boards different from generic PCB copy work
Three things trip up shops that treat a lighting board like any other board.
Thermal copper is not decoration. On an LED module the copper pour under and around each emitter is a heat path. Trim it to make routing tidier and you shift junction temperature, which shifts flux, color point and lifetime. Copper weight, via-in-pad count, and dielectric thickness on a metal-core board all get replicated as measured, not as convenient. IPC-2152 is the reference for current-carrying capacity, but for LED thermal pads the original geometry is the specification.
Safety spacing is part of the design. Mains-input driver boards have slots, cut-outs, and deliberate keepouts across the isolation barrier. Those clearances follow the original manufacturer’s safety approval, and a copy that quietly narrows them is a copy you can’t ship. IPC-2221 gives the general spacing framework; the original board tells you which category it was built to.
Potting and conformal coating. A large share of outdoor and wet-location lighting boards arrive in a block of epoxy or silicone. Silicone potting usually comes off mechanically with patience. Hard epoxy sometimes has to be removed chemically or thermally, and that risks the very components you need to identify. If you have two units, send both — one to sacrifice, one to keep intact as the reference. Similar constraints show up on other sealed power hardware, which is why the workflow overlaps heavily with inverter board duplication.
The controller: firmware, and when you need it
A dimming or scene controller with a blank replacement MCU is a paperweight. The hardware copy gets you a board; it does not get you the dimming curves, DALI address table, or fade logic that lived in flash.
If you own the product and have lost the source or hex file, firmware recovery from a locked microcontroller is a normal maintenance task. What determines feasibility is the specific part and its protection state — an 8051-class part with lock bits set behaves very differently from an STM32 at RDP Level 1 versus Level 2, and an MSP430 with the JTAG fuse blown and no BSL password is a different problem again. We assess the actual chip marking before saying anything about it. Read the notes on drive and controller board recovery if your fixture uses a motorized head or a moving-mirror assembly, since those boards mix both problems.
You need to hold the rights to the design you’re asking us to work on, and comply with the IP law that applies to you. Every project runs under NDA, and we don’t take work that looks like someone else’s product being copied for resale.
Which lighting jobs are easy, and which are not
| Board | Difficulty | What drives it |
|---|---|---|
| Single-sided aluminum LED module | Low | Copper weight and dielectric measurement; footprint accuracy |
| Double-sided FR-4 driver, all marked parts | Low to moderate | Magnetics characterization, isolation spacing |
| Driver with house-marked controller IC | Moderate | Part identification; may need a functional equivalent |
| 4-layer DALI/DMX controller | Moderate to high | Inner layer imaging, plus firmware if the MCU is locked |
| Fully potted outdoor fixture board | High | Encapsulant removal risk; needs a sacrificial sample |
| Board with a custom ASIC or unmarked sole-source IC | Sometimes not feasible as-is | No drop-in equivalent exists; redesign of that stage is the honest answer |
What to send us, and what comes back
Getting this right in the first email saves days.
- Photos of both sides on a dark, matte background, whole board in frame, square to the camera, in focus. Then close-ups of every IC marking, the transformer or inductor label, and any burned area.
- Board dimensions — length, width, thickness, and whether the substrate is FR-4 or metal.
- The chip markings typed out as text, including the second and third lines. A photo plus text beats a photo alone.
- One line on deliverables — “Gerbers and BOM only”, or “Gerbers plus schematic”, or “files plus 50 assembled units”, or “files plus firmware from the locked MCU”.
- Quantity and end use. Ten spares for an installed base is a different project than a production run.
Back from us: a feasibility statement that names any part or layer we’re unsure about, a lead time, a price, and the deliverable list. If something can’t be done, we tell you at quoting time, not after you’ve paid. Boards with similar thermal and mains-side constraints — the sort described in our HVAC control board work — follow the same intake pattern.
FAQ
Can you copy an LED driver board if the switching IC has no readable part number?
Often yes, but not always as an exact copy. We identify the part from package, pinout, and surrounding topology, then propose a current equivalent. If the original was a custom or fully house-coded part with no second source, the honest path is redesigning that one stage to hit the same output specification rather than pretending a drop-in exists.
How long does a lighting PCB copy take?
A single-sided LED module with marked parts is typically a few days. A two-layer driver runs longer because the magnetics and safety spacing need measurement and verification. A four-layer controller with potting removal and firmware recovery is meaningfully longer again — inner-layer imaging and chip work are sequential, not parallel. We quote a date against your specific board.
Send the chip marking or two photos. You get feasibility, lead time and price within 24 hours, and the check costs nothing.Working on a board like this?
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