6 components coveredField manual · TV
Samsung Crystal UHD TU7000 / CU7000: quick sheet
Covers: Samsung Crystal UHD entry 4K sets: TU7000 (2020, e.g. UN55TU7000FXZA) and CU7000 (2023, e.g. UN55CU7000FXZA), sizes about 43-85 in. Model-year letter: T = 2020, C = 2023 (DisplaySpecifications, Micro Center, AV-iQ listings).
Samsung's highest-volume budget LED TV: edge- or direct-lit (by size) LED backlight, 60 Hz native panel, Tizen OS, two HDMI ports on many sizes. The dominant repair is the LED backlight (loose strip connector or failed strip), followed by the power board.
Safety first
- Unplug the set and wait several minutes before opening the back: the power-supply primary capacitors can hold a dangerous charge after unplugging.
- Power-supply and LED-driver checks with the set plugged in are caution work: insulated probes, one hand, no jewelry, and never touch the primary (hot) side.
- Lay the panel face-down only on a clean, padded, flat surface; open-cell panels crack from twisting or pressure on the glass.
- Two people for 55-inch and larger sets; lift by the frame, never by the screen.
- Use ESD protection when handling the main board and T-con; the flat flex cables tear easily.
How it works
A combined power board feeds the main board and backlight drive. The main board runs Tizen and sends video to the panel's integrated timing control.
The LED strips sit behind the panel; a failed or poorly connected strip gives a black screen with sound, a dark edge, or intermittent blackouts. Samsung 'Motion Rate 120' is processing, not a 120 Hz panel.
Built-in Picture Test (Settings > Support > Device Care / Self Diagnosis) separates source problems from TV problems before opening the set.
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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.
