Turn the TV on and watch your meter closely at the LED output connector. If the voltage spikes up high for a brief second and then drops back down to a baseline level, the 17IPS62 circuit is functioning properly, but it is detecting an open-circuit fault caused by a burnt-out LED strip inside the panel itself.
Handles the AC mains input, rectification, and high-voltage filtering. It typically converts 230V AC into a stable ~400V DC (PFC) or ~320V DC.
[ AC Input & EMI Filter ] ---> [ Bridge Rectifier & Filter ] ---> [ DC-DC Flyback Controller ] │ ┌──────────────────────────────────────────────────────┴──────────────┐ ▼ ▼ [ Low-Voltage Secondary Outputs ] [ LED Driver Circuit ] (VSTANDBY, +12V, +5V, +3.3V) (Step-Up Boost Converter) The Primary (Hot) Side
If you want, I can generate:
To help tailor this guide or troubleshoot your specific board layout, let me know: What is your television exhibiting?
A schematic diagram for the 17IPS62 provides:
Layer management
| Pin | Signal | Function | Notes | |-----|--------|----------|-------| | 5 | EN / STBY ON/OFF | Enable output | Apply 3.3V or 5V to turn on secondary outputs | | BKL_on/off | Backlight enable | Enable LED driver | Pull high with 3.3V/5V through 1.8kΩ resistor | | PWM | Backlight intensity | PWM dimming control | Dimming pin should be high or contain a square wave; if low, backlight stays off |
Always isolate whether a "no picture" issue is caused by the 17IPS62 board or the actual LED strips inside the screen. If the voltage at the LED connector spikes up to 60V–90V for a split second when you turn the TV on and then drops back down, the 17IPS62 board is working perfectly. The internal protection circuit is shutting down the voltage because an LED strip inside the panel has failed open-circuit.
Unlike larger power supplies that feature an active Power Factor Correction (PFC) circuit, standard versions of the 17IPS62 rely on a passive configuration. The rectified DC is smoothed directly by a large electrolytic bulk capacitor (usually rated at 450V, 68µF to 150µF). This establishes the primary DC rail, which sits around 310V to 325V DC in 230V AC regions, or 160V to 170V DC in 110V AC regions. 17ips62 schematic diagram
You can find the schematic at Eletronica PT or through reputable repair forums. Searching for "Vestel 17IPS62-R2" or "Vestel 17IPS62-R3" will yield the most accurate diagrams.
Offline & export
Despite numerous online resources, a clear, verified schematic for this board can be difficult to find. Several revisions exist, but many online copies may have errors or be incomplete. However, there are known sources: Turn the TV on and watch your meter
: Features +400V distribution and SMPS converter blocks.