User question
715G8003-M01-B00-004K nand flash
Artificial Intelligence Response
Direct answer to the question
- NAND flash on mainboard 715G8003-M01-B00-004K is Winbond W29N01GVSIAA (1 Gb = 128 MB SLC, 3.3 V, TSOP‑48), PCB designator U405. (firmware.dou.pt)
- Key device parameters (from Winbond 1 Gb SLC NAND datasheet family): 2048‑byte pages (+64‑byte spare), 64 pages/block (128 KB), 2.7–3.6 V supply, x8 parallel bus, TSOP‑48. (alldatasheet.com)
- If the original is unavailable, use a pin‑compatible 1 Gb x8 SLC TSOP‑48 from major vendors (e.g., Kioxia/Toshiba TC58BVG0S3HTA00) after verifying ID, timings and ECC requirements. (nxpcs.com)
Detailed problem analysis
- Board context and variants
- The 715G8003‑M01‑B00‑004K mainboard is used across several LG LH50xx models (e.g., 43LH500T‑ZA, 32LH500D, 43LH501C). Regional SKUs and week codes (e.g., WK‑1603) exist, and firmware/panel pairing matters. (media-power.pl)
- Confirmed NAND device and placement: “U405 = W29N01GVSIAA” for 43LH500T/this board family. (firmware.dou.pt)
- SoC can vary by region/revision (e.g., LG’s 43LH500T page lists MStar MSD3393; other repair notes show different SoCs on similar boards). This affects bootloader/ECC behavior but not the NAND pinout. (lg.com)
- What resides in NAND (typical LH50xx layout)
- Second‑stage bootloader, kernel and root filesystem; NVM/calibration partitions. Corruption commonly yields boot loops, LG‑logo hangs, or failure to save settings. Field guides for the 43LH500T explicitly identify 1 Gb NAND as the firmware store. (tel-spb.ru)
- Memory organization and implications
- Large‑page SLC: 2,048+64 OOB bytes per page; 64 pages per block; 1,024 blocks total. When cloning, mind whether your dump includes spare (OOB) bytes; mismatches cause ECC errors at boot. (alldatasheet.com)
- Why these parts are chosen
- SLC provides high P/E endurance (~100k cycles) and 10‑year data retention—appropriate for TV firmware storage. (datasheetbank.com)
Current information and trends
- Availability: Parallel TSOP‑48 SLC NAND (1–16 Gb) remains available from Kioxia/Toshiba and others, though many new TVs move to eMMC or serial (SPI) NAND to reduce pin count. (nxpcs.com)
- U405/W29N01GVSIAA board‑matched dumps for 715G8003‑M01‑B00‑004K (e.g., panel TPT430H3‑HVN01.U) are publicly cataloged; always match board week/panel. (firmware.dou.pt)
Supporting explanations and details
- Electrical and timing essentials (Winbond 1 Gb SLC family)
- VCC = 2.7–3.6 V; tR ~25 µs; page program ~250–300 µs; TSOP‑48 footprint 12×20 mm, 0.5‑mm pitch. (datasheetbank.com)
- Compatible substitutes (examples)
- Same class devices (1 Gb, x8, 3.3 V, TSOP‑48) from Kioxia/Toshiba may be used after verifying ONFI command set and ECC requirements—for instance TC58BVG0S3HTA00. Do not assume larger density parts (2 Gb, etc.) will boot unless the bootloader supports them. (nxpcs.com)
- Board/firmware coupling
- Dumps and .epk packages can be panel‑ and week‑specific. Using a mismatched image may yield inverted/split picture, no backlight, or no boot. The known dumps for this board explicitly state U405=W29N01GVSIAA and the paired panel code. (firmware.dou.pt)
Ethical and legal aspects
- Firmware binaries are copyrighted; use them solely for repair of the device you own/are servicing and comply with local right‑to‑repair rules and service agreements.
- Protect user data that may reside in NAND (Wi‑Fi keys, channel lists).
Practical guidelines
- Identification and pre‑checks
- Visually confirm U405 marking and part code; verify 3.3 V rail stability and clock/reset at the SoC before condemning NAND. Reference photos/lists for this board identify U405 as NAND. (kenotrontv.ru)
- Recovery path (in increasing intrusiveness)
1) If the set still boots far enough, attempt a USB firmware update (.epk) for the exact model. If it cannot parse the update, proceed below.
2) Off‑board reprogram: hot‑air remove U405; read and save the original (even if corrupt); program a verified, board‑matching dump to a blank W29N01GVSIAA (or vetted 1 Gb x8 TSOP‑48 equivalent); verify; solder back; test. Use dumps that match your WK code/panel—examples exist for WK‑1603 with TPT430H3‑HVN01.U. (firmware.dou.pt)
3) Replacement with equivalent: if using a Kioxia/Toshiba 1 Gb TSOP‑48 part, confirm device ID and ECC settings the platform expects; some controllers require 4‑/8‑bit BCH capability or special handling (Kioxia “BENAND” integrates ECC if the host is limited). (americas.kioxia.com)
- ECC/OOB notes
- Match your programmer settings to the dump type (raw with OOB vs. filesystem‑only). Writing the wrong format often produces immediate CRC/ECC faults at boot.
Possible disclaimers or additional notes
- There are board/SoC variants (e.g., MStar MSD3393 vs. others) under the same 715G8003 umbrella; always read the old chip first to capture calibration/NVM before erasing. (lg.com)
- Some community dumps are 128 MB targets; others are larger and must be trimmed/padded to 128 MB to fit a 1 Gb device. Validate image size/layout against the device geometry. (alldatasheet.com)
Suggestions for further research
- Obtain the exact week/panel sticker data from your board and search for a matching U405 NAND dump (e.g., WK‑1603 + panel code). (firmware.dou.pt)
- If you want to migrate to a different vendor’s 1 Gb part, compare datasheets (ID, timings, page/block geometry) before programming. (nxpcs.com)
Brief summary
- The NAND on LG mainboard 715G8003‑M01‑B00‑004K is Winbond W29N01GVSIAA, U405, 1 Gb SLC, 3.3 V TSOP‑48. Use only a geometry‑matching 1 Gb x8 SLC TSOP‑48 if substituting and program a board‑ and panel‑matched dump; mismatches and ECC/OOB handling errors are the most common pitfalls. (firmware.dou.pt)
If you tell me your exact TV model suffix, panel code, and the week code printed on the board (e.g., WK‑1603), I can point you to a compatible dump and confirm substitute parts.
Disclaimer: The responses provided by artificial intelligence (language model) may be inaccurate and misleading. Elektroda is not responsible for the accuracy, reliability, or completeness of the presented information. All responses should be verified by the user.
