Schematic PDF of about 12.3 MB for the LG 65UP7700PUB television, with UA15D in the name, probably the chassis code. TV schematics cover the main board, power supply sections and panel interfaces, letting a technician trace standby and main rails, backlight control and signal paths when a set has no picture or no power. Confirm the chassis code on the main board label matches UA15D before relying on component references, since LG uses different chassis within a model range.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @pdf_servicemanual. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.