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‐ “File NAND Samsung UE32D5500” usually refers to a complete, raw dump (“bin” file) of the K9GAG08U0E TSOP-48 NAND flash fitted on the main board (BN41-01660A/B, BN94-05xxx).
‐ Publicly shared, model-specific dumps can be downloaded from specialised firmware repositories (e.g. firmware.dou.pt), from repair forums (Elektroda, Badcaps) or purchased pre-programmed from component vendors (MJK-Electronics, AliExpress).
‐ Use only a dump that matches ALL of the following: TV model, main-board code, panel code, tuner option and region. A mismatch often results in boot failure or distorted picture.
Key points
• Typical chip: Samsung K9GAG08U0E, 4 Gbit SLC, TSOP-48
• Main board codes: BN41-01660A/B, BN94-05 xxx
• Reliable sources:
– https://firmware.dou.pt (UE32D5500RW / UE32D5500WXTK archives)
– Elektroda thread “Samsung D5500-D5700 NAND dump”
– Badcaps forum request thread 59943
• Mandatory tools: TSOP-48 NAND programmer (RT809H, XGecu T56/TL866II + adapter) & hot-air station for chip removal.
Hardware background
• UE32D5500 (2011 “D” series) stores its bootloader, Linux kernel, rootfs and NVM data in an external parallel NAND (IC1302).
• The SoC contains only a tiny ROM; if the first boot blocks in NAND become unreadable the TV enters an endless reboot at the “SMART TV” logo.
Failure modes
• Natural wear (SLC endurance ~100 k cycles)
• Interrupted firmware-OTA update or power loss during write
• ESD / over-voltage damage on VCCQ or WE# lines
Why a raw NAND dump is required
• The official Samsung USB firmware package updates only the application partitions; it cannot recover a corrupted bootloader/BML partition.
• Therefore the chip must be re-written off-board or replaced by a pre-programmed device containing a known-good dump.
Partition map (typical)
0x000000 – 0x00FFFF BL1 (1 MB, proprietary)
0x010000 – 0x04FFFF u-boot / bootloader
0x050000 – 0x24FFFF Kernel + initrd
0x250000 – 0xA4FFFF RootFS (squashfs/ubi)
0xA50000 – … /mtd_rwarea (panel/power-on counter, EDID, MAC, DUID)
Backup partitions duplicate BL1+u-boot for redundancyPanel / Option data
• Inside /mtd_rwarea reside model-unique parameters.
• If you flash a dump from a TV with a different LCD panel (e.g. LTJ320HN01-L vs LD320BGC-C1) the picture may appear solarised or inverted.
• Recommended workflow: read YOUR corrupt chip first, extract panel table & DUID, patch the donor dump, then program.
• 2023/24 repositories such as firmware.dou.pt have consolidated multiple region-specific UE32D5500 dumps, each accompanied by a text file listing main-board and panel codes.
• Ready-to-solder pre-programmed NANDs (K9GAG08U0E) are sold on e-commerce sites; they are now commonly used by field technicians to shorten turnaround time.
• Modern replacement boards move to eMMC (BGA153) eliminating external parallel NAND; hence demand for TSOP-48 dumps is declining but still relevant to legacy sets.
Programming sequence (RT809H example)
Analogy: Think of the NAND dump as a cloned SSD image for a laptop. Re-installing Windows from USB (=Samsung OTA) won’t help if the SSD’s boot sector is unreadable; you need a full disk image or a new SSD pre-imaged.
• Firmware binaries remain Samsung intellectual property; distribution without licence may infringe copyright. Communities typically exchange dumps under the “repair exception” allowed in many jurisdictions, but commercial resale of firmware files can be legally ambiguous.
• Ensure ESD protection; TSOP-48 pins are sensitive (<2 kV HBM). Improper hot-air technique can delaminate PCB pads, rendering the board irreparable.
Best practice checklist
✓ Confirm main-board P/N and panel P/N before downloading.
✓ Backup original NAND even if unreadable sectors exist (use “ignore bad” mode).
✓ Verify that the donor dump passes ECC check (no un-correctable pages).
✓ Keep re-flow dwell <20 s per side to avoid BGA SoC warpage.
✓ After successful boot, perform “Factory reset” in service mode, then retune channels.
Potential challenges & mitigation
• Bad-block translation differences → use programmer option “keep original bad-block table”.
• TV boots but network features fail → restore original MAC & DUID strings (offsets 0x3A0000-0x3A00FF typically).
• Picture negative ↔ Service Menu > Option > “Panel” to correct code, or re-flash matching dump.
• Some late-production D-series sets introduced AES-signed bootloaders; the generic dumps will NOT boot on those units. Check silkscreen “SECURE BOOT” jumper near SoC.
• All instructions assume advanced soldering skills; novices risk destroying both PCB and replacement chip.
• Study Samsung “Clean NAND” procedure in service training manual for D-series.
• Explore open-source SamyGO project; they document partition layouts and how to patch DUID and panel tables.
• Evaluate re-balling the SoC DRAM if random resets persist after NAND replacement (rare but observed).
Resources for deeper study
– Samsung Training Guide “2011 D5500/5700 Chassis” (service.pdf)
– SamyGO wiki: https://wiki.samygo.tv
– Application note: ONFI NAND programming with RT809H (Waveshare, 2022)
To revive a Samsung UE32D5500 caught in a boot loop, you need a raw K9GAG08U0E NAND dump that exactly matches your main board and panel. Repositories such as firmware.dou.pt and forums like Elektroda provide verified archives. Desolder the NAND, program it with a TSOP-48 capable tool (RT809H/TL866II + adapter), resolder, and clear service data. Observe ESD, legal and safety precautions; mismatched or corrupted dumps will cause new faults. Following the outlined steps and best practices restores normal operation in the vast majority of D5500 repairs.