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‐ Sharp removed public download links for legacy AQUOS models such as the LC-40LE730E.
‐ The only officially supported way to obtain correct, safe firmware is to request it from an authorised Sharp/UMC service partner, giving them:
• Full model code (LC-40LE730E-xxx)
• Serial number
• Main-board code (e.g. “DUNTKxxx” or “QPWBXFxxx”)
‐ If you choose an unofficial route, the most frequently referenced community archive is the Elektroda technicians’ forum; look for the package “upgrade_loader.pkg” (or “zTVApp_Complete.zimage”), version 1.16, that matches your board/panel combination.
‐ Never load NET vs. non-NET firmware interchangeably; a mismatch bricks the main board.
‐ Update is performed from a FAT32 USB stick via the on-screen menu (normal mode) or a key-combo recovery (service mode) detailed below.
Model & hardware variants
• LC-40LE730E was manufactured for the European market in 2011.
• Two hardware lines exist:
– “NET” (smart, uses AQUOS NET+) – main board codes DUNTK-xxx.
– “non-NET” (basic) – main board codes often ending “-A” or “QPWBXF-xxx”.
• Firmware images contain board-specific panel tables; they are not cross-compatible.
Why firmware is no longer public
• Since Sharp’s European TV business was licensed to UMC (2015 →), public FTP repositories were closed (~2020).
• To limit liability for bricked sets and to control copyrighted binaries, distribution is restricted to service partners.
Typical reasons to update/recover
• Boot-loop / stuck on Sharp logo (corrupted NAND or SPI).
• HDMI-handshake glitches fixed by v1.16.
• DVB-T2 re-tuning issues in some regions.
• Service replacement of main board that ships blank.
File types you may encounter
• upgrade_loader.pkg (standard Sharp USB package)
• zTVApp_Complete.zimage (identical image repackaged)
• .BIN / .SPI (raw 8 MB SPI dump, for external programmer)
• 2023-2024: No new firmware revisions have appeared; v1.16 (2013) remains the latest known build.
• Independent repairers increasingly back up working SPI flashes and share them on forums (Elektroda, BadCaps) because official channels refuse out-of-warranty support.
• Low-cost CH341A SPI programmers make “chip-off” recovery viable when USB update fails.
• Sharp/UMC is focusing on Android-based models; legacy AQUOS support is in maintenance-only state.
USB update (TV operates):
Forced recovery (boot-looping set):
External SPI method (last resort):
• Desolder or clip-on to 25Q64/25Q80 chip, program verified *.BIN, re-assemble.
• Firmware is Sharp/UMC intellectual property; redistribution without permission may violate copyright.
• Using unverified binaries risks permanent hardware damage and may void regional safety approvals (CE, TÜV).
• Service-menu misuse can alter panel voltage tables, posing fire/back-light safety hazards.
• All procedures at your own risk; the author assumes no liability for equipment damage or data loss.
• Some shared files online are for adjacent models (LC-40LE730, LC-40LE730RU, etc.) – do not trust filenames alone; compare CRC/MD5 against service documentation where possible.
• TVs manufactured late 2011 may ship with newer NAND revision that refuses early images; if USB update aborts instantly, request the service-center “UEC-key” build.
• Search Elektroda thread “LC-40LE730E firmware USB/SPI flash” – contains board-code lookup tables and MD5 hashes.
• Study Sharp service manual (doc-ID S81M0LC40LE730E) for panel voltage references before experimenting in service mode.
• Investigate community projects on reflashing via UART and u-boot command line (gives deeper insight and backup options).
• Monitor UMC’s B2B portal; occasionally legacy images are reposted for authorised dealers.
Sharp no longer hosts public firmware for the LC-40LE730E. To obtain a safe, correct image, contact an authorised Sharp/UMC service partner with your TV’s full identifiers. If you resort to community archives (Elektroda, KenotronTV), double-check board code, use a FAT32 USB stick, and follow the standard or forced-recovery procedure outlined. Mismatched firmware or interrupted flashing will brick the main board, so proceed cautiously and back up your SPI flash whenever possible.
