Toshiba 55U7750EV USB Ports: Supported Formats, PVR, Firmware, and Common Issues

User question

Toshiba 55U7750EV usb

Artificial Intelligence Response

Direct answer to the question

• The Toshiba 55U7750EV provides two side-mounted USB host ports (1 × USB 3.0 “SS”, 1 × USB 2.0).
• Via these ports the set can:
  • play multimedia files from mass-storage (flash/HDD)
  • accept firmware upgrades (‐> FAT32 stick with upgrade file in root)
  • buffer Time-Shift / PVR recordings where the function is enabled in the regional firmware
  • power low-current HID peripherals (keyboard / mouse)
• Best results are obtained with FAT32-formatted media ≤ 256 GB; NTFS and exFAT are partially supported but not guaranteed.

Detailed problem analysis

1. Hardware implementation
   • USB 3.0 port is driven by the MStar MSD6586 (T8E2) SoC’s SuperSpeed PHY → ≤ 5 Gb/s, 5 V / 900 mA.
   • USB 2.0 port shares the legacy OHCI/EHCI controller → 480 Mb/s, 5 V / 500 mA.
   • Current-limited by polyfuse (≈1.1 A trip) – bus-powered 2.5″ HDDs usually work on the blue USB 3.0 port only.

2. Supported logical layer
   File systems (factory firmware v2.xx):
   – FAT16/32: full R/W, mandatory for upgrade routine
   – NTFS: read-only in most regions; write enabled only if PVR licensed
   – exFAT: read-only; large-file (>4 GB) movie playback works on recent builds
   Media containers / codecs (tested on 2023-12 OTA build):
   – Video: MPEG-2, MPEG-4/AVC, H.265/HEVC, VP9 in MKV/MP4/TS/AVI up to 2160p@60 Mb/s
   – Audio: MP3, AAC, AC-3, E-AC-3, DTS-Core (down-mixed if no passthrough), FLAC (≤ 96 kHz)
   – Image: JPEG, PNG, BMP up to 32 MP
   Limitations: no support for Dolby Vision profile 5 via USB; HDR10 metadata respected.

3. Firmware upgrade path
   a) Download region-matching “MstarUpgrade.bin” (MSD6586-T8E2) from Toshiba portal.
   b) Format a ≤ 8 GB stick FAT32, copy file to root.
   c) Insert into USB 2.0 port, power-cycle TV with “VOL-” on handset pressed → boot-loader scans, flashes, auto-reboots.

4. Typical failure modes & mitigation Symptom	Probable cause	Remedy
   “USB device not recognized”	unsupported partition table (GPT)	Re-partition MBR, FAT32/NTFS primary
   Playback freezes on 4 K file	slow stick (≤10 MB/s)	Use UHS-I/U3 flash or powered SSD on USB 3.0
   PVR greyed out	region FW lacks DVR licence	No fix except FW swap (may void warranty)
   Drive spins up, drops off bus	inrush trips polyfuse	Use Y-cable or powered hub

Current information and trends

• 2023/24 Toshiba and Vestel co-developed TVs with Realtek RTD2851 are migrating to USB 3.2 Gen1 only, dropping USB 2.0 while adding exFAT write support.
• H.266/VVC and AV1 decoding will arrive by SoC generation MSD9W6 in 2025; current 55U7750EV lacks hardware blocks → external streamers advisable for future codec adoption.
• TV-based PVR is declining in EU due to broadcaster DRM (DVB-CI+ ECP); network PVR/OTT catch-up is replacing USB recording.

Supporting explanations and details

• File-size ceiling: FAT32 = 4 GiB – long HDR movies exceed this; use NTFS/exFAT or split file with MKVToolNix.
• HID profile: Android-TV layer (API 23) enumerates keyboards as /dev/input/event*, layout selection under Settings → Language & Input.
• USB hot-plug sequence: SoC issues 5 V after debounce ≈60 ms; safe removal menu unmounts block device to avoid ext-journal corruption.

Ethical and legal aspects

• PVR recordings are encrypted with HDCP key pair and cannot be replayed elsewhere – bypassing this violates EU copyright directives.
• Firmware images are region-locked; using third-party or unlicensed builds may infringe Toshiba/Vestel IP and revoke warranty.
• Ensure compliance with WEEE when disposing of USB storage containing personal data.

Practical guidelines

1. Preparing media stick for playback
   • Format FAT32, cluster 32 kB.
   • Copy media; keep directory depth ≤5 to avoid Android file-descriptor limits.

2. Recording live TV
   • Plug ≥32 GB 5400-RPM HDD to USB 3.0, let TV initialize → creates hidden “ToshibaDVR” partition.
   • Schedule recording in EPG; note encryption caveat.

3. Troubleshooting checklist
   • Confirm drive visibility: Settings → Storage.
   • Check codec with “MediaInfo”.
   • Update firmware before raising service ticket.

Possible disclaimers or additional notes

• Not all production batches have USB 3.0 (some early 2018 lots are dual USB 2.0). Inspect label “SS” beside port.
• exFAT write support appeared after firmware v2.18; earlier builds need OTA or manual update.
• HDDs >2 TB with 4 k native sectors sometimes mis-report size; repartition on PC with 512-byte emulation.

Suggestions for further research

• Investigate replacing default media player with sideloaded VLC/Kodi for wider codec coverage.
• Monitor Vestel release notes for AV1 back-port; community forums (soft4led, KazmiElecom) often leak beta firmware.
• Compare power-consumption impact of bus-powered HDD vs. network streaming via DLNA.

Brief summary

The 55U7750EV’s USB subsystem (1×USB 3.0, 1×USB 2.0) enables multimedia playback, firmware updating and, where licensed, PVR/Time-Shift. Use FAT32 for upgrades, fast USB 3.0 media for 4 K files, and powered drives when current draw exceeds 900 mA. Keep firmware current (MSD6586-T8E2 family) to gain exFAT and improved codec support. For future-proof high-efficiency codecs or advanced HDR, consider an external streamer, since the built-in SoC is limited to H.265/VP9.

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