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• TP.SK713S.PC825 (N) is a Chinese-manufactured “combo” Smart-TV main-board (power supply + LED back-light driver + CPU/graphics/audio) belonging to the TP/SK-713 platform family.
• It is used as an economical replacement or OEM board in 32- to 50-inch LCD/LED sets and, with the correct firmware, can drive panels from 1366 × 768 up to 3840 × 2160 (4 K).
• Baseline hardware: 64-bit quad-core SoC, 1 GB DDR3 RAM, 8 GB eMMC, integrated analogue tuner, Wi-Fi/Bluetooth option, and the usual I/O (HDMI, USB, VGA, CVBS, RF, headphone).
• Most field failures are firmware-related (stuck-on-logo / reboot loop); 90 % are cured by re-flashing the proper BIN file from FAT32 USB.
Board architecture
• Single PCB, code PC825, revision “N” (non-encrypted, non-Android) based on Smart-King SK713S reference design.
• Functional blocks
– AC-DC fly-back SMPS (100-240 V AC → 12 V / 5 V / 3.3 V rails)
– Constant-current boost LED driver (30–120 V, 300–700 mA adjustable)
– Main SoC (common markings: “SPV9S01-A”, “TSUMV59X”, or “MSD338” depending on batch) with integrated GPU, MPEG-2/-4, H.264/H.265, VP9 decoders up to 4 K@60 Hz
– 1 GiB DDR3L (typically one 8-Gb BGA)
– 8 GiB eMMC or NAND (holds boot loader, Linux/RTOS kernel, middleware, OSD resources)
– ATSC/PAL/SECAM tuner + demod; optional DVB-T/T2/C/S2 front-end via mini-board
• Connectors
– 2–3 × HDMI 2.0, 2 × USB 2.0 (one OTG/upgrade), VGA, AV-in, RF-in, headphone, SPDIF, IR/keypad, LVDS (single/dual 6/8-bit), back-light, speakers.
• Jumpers & test pads
– JP1-JP3: panel voltage 3.3 V / 5 V / 12 V
– JP4: LVDS channel swap
– TP3-TP7: 12 V, 5 V-STB, 3.3 V, BL-EN, PWM for on-bench diagnostics.
Firmware/EEPROM concept
• Boot ROM is hard-coded in the SoC → loads 8-MB SPI NOR (W25Q64/W25Q128).
• Panel timing tables, EDID, logo and UI strings are stored in the eMMC partition “vendor”.
• Because every panel needs its own timing table and LVDS map, there are dozens of BIN images circulating on service forums (Kazmi-Elecom, SoftServiceTV, Remont-Aud, Elektroda).
• “(N)” suffix means no secure-boot; therefore flashing from USB is straightforward.
| Typical failure modes & root cause analysis Symptom |
Likely root cause | Diagnostic hints |
|---|---|---|
| Dead, no standby LED | SMPS primary short (MOSFET, PWM IC), open startup resistor | Measure 310 V DC on main cap; scope Vcc of PWM (12–18 V) |
| Red LED only, no boot | Corrupted SPI flash / wrong firmware | Try emergency USB flash; if LED not blinking, program W25Qxx offline |
| Stuck on logo loop | Damaged vendor partition or eMMC bad blocks | Full BIN re-flash; if still looping, replace eMMC (BGA rework) |
| Back-light ON but dark screen | Wrong panel voltage or LVDS map | Verify JP1-3, set correct panel power; service-menu “LVDS_MAP” 0-15 |
| Solarised / inverted colours | Incorrect LVDS 6/8-bit mode | Service-menu → Panel Settings → “TI-Mode” / “SwapRB” |
| No sound on RF/HDMI | Audio PA (TPA3110 15 W×2) Vcc missing, PA mute stuck | Check 12 V-AUDIO rail, mute pin logic. |
In-circuit measurements (reference, unloaded)
• AC in: 100–240 V 50/60 Hz, 60–80 W max (4 K panel, 400 mA LED string).
• Main cap: 300–325 V DC (230 V mains)
• +12 V: 11.8–12.2 V, ripple <120 mVpp
• +5 V-SB: 5.05 V, present in standby
• +3.3 V-STB: 3.29 V, SoC RTC power
• LED boost: 60–110 V at 350–550 mA depending on panel.
• 2023–2024 batches of PC825(N) are shipping with higher-density 16 GB eMMC and HDMI 2.1 TMDS level shifters to advertise 4 K @ 120 Hz on spec sheets, although real decoding remains 4 K @ 60 Hz.
• Manufacturers increasingly lock firmware with signed headers (suffix “P” or “X”). The unsuffixed “N” version is still open, making it popular in repair circles.
• After the Indian BIS safety update (IS 13252-1:2022) many local importers glue a 3 A slow-blow fuse next to the AC socket; check this fuse first on “completely dead” sets.
• Panels are migrating to eDP; the SK713 platform’s successor (TP.SK855) will drop native LVDS and add eDP bridge IC.
Example: If you install firmware compiled for a 1920×1080 single-8 LVDS panel on a 3840×2160 dual-8 panel, the back-light will come on but the T-Con will reject the timing → black screen; audio may still work.
Analogy: Think of the firmware as a BIOS with a fixed EDID for a specific monitor; the wrong BIOS boots but cannot talk to the monitor.
• Firmware images are often shared without explicit copyright permission; re-distribution may violate OEM licences.
• Always ensure mains safety (IS 10152 / IEC 60065) when servicing: isolate, discharge PFC capacitors, use differential probes.
• Be aware of RoHS/REACH compliance when sourcing replacement PCBs; grey-market boards may use non-compliant solder or flame retardants.
Firmware flashing (USB method)
.bin or .pkg file—no folders. Best practices
• Read the original SPI flash with CH341A before doing anything—acts as a full backup.
• Use an isolation transformer when probing SMPS primary.
• When replacing eMMC, program it externally with the full scatter file; in-system flashing often fails if boot0/1 corrupt.
| Potential challenges & mitigation Challenge |
Mitigation |
|---|---|
| Unknown panel model | Read panel sticker, cross-reference in “Panel_Voltages.xlsx” library or measure VGH/VGL lines on T-Con. |
| No firmware on forums | Dump working board from same TV, use as template; change LVDS map later in service menu. |
| Random HDMI dropouts | Add heatsink to TMDS switch IC, update EDID block via “Factory->HDMI EDID Write”. |
• Specifications (RAM/ROM) vary; early 2019 lots shipped with 512 MB RAM/4 GB NAND. Always confirm on the silk-screen or by cat /proc/meminfo in UART console.
• Because of cost constraints, the board lacks PFC; harmonic distortion is high—do not install in commercial signage without line conditioning.
• Some BINs disable Miracast/Chromecast to avoid licence fees—functionality loss after firmware change is not always a defect.
• Reverse-engineer UART command set (115200-8-N-1 on CN3) to enable secure boot or root shell.
• Evaluate replacing LVDS with an eDP bridge (LT8618HX) for QLED panel retrofits.
• Investigate open-source boot loader (u-boot) replacement to extend life of TVs after vendor stops updates.
Useful resources
– Kazmi‐Elecom blog “TP.SK713S ALL BIN” (hundreds of panel presets)
– Elektroda forum threads 1122884 and 1187669 (schematic fragments)
– YouTube channels “Smart Service” and “ElectronicsRepairss” for walk-through videos
TP.SK713S.PC825 (N) is a universal, low-cost Smart-TV combo main-board capable of driving HD to 4 K panels. Most malfunctions stem from corrupted firmware; re-flashing the correct image via USB resolves the majority of cases. Board servicing involves standard SMPS troubleshooting, correct panel voltage jumper selection, and, when required, off-board programming of the SPI flash or eMMC. Observe safety regulations and use verified firmware sources to avoid permanent damage.
User question
where can i find the bin file or the firmware
Artificial Intelligence Response
Direct answer to the question
Key points
Detailed problem analysis
Current information and trends
Supporting explanations and details
Ethical and legal aspects
Practical guidelines
Where to look (priority order)
Safe procedure (USB update)
If forced USB doesn’t start
Typical failure modes and fixes
Possible disclaimers or additional notes
Suggestions for further research
Brief summary
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User question
Bonjour J'ai besoin de software comment je peux l'avoir
Artificial Intelligence Response
DIRECT ANSWER TO THE QUESTION
KEY POINTS
DETAILED PROBLEM ANALYSIS
CURRENT INFORMATION AND TRENDS
SUPPORTING EXPLANATIONS AND DETAILS
ETHICAL AND LEGAL ASPECTS
PRACTICAL GUIDELINES
POSSIBLE DISCLAIMERS OR ADDITIONAL NOTES
SUGGESTIONS FOR FURTHER RESEARCH
BRIEF SUMMARY
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