Test Points with V500DJ6-QE1 T4 Panel

In this article, NT61303H-C52A2B COF Data 3, we are presenting a complete reference guide for the V500DJ6-QE1 T4 panel, where you will find full COF data along with detailed test points. In this guide, we are providing the complete data sheet of both left and right scaler strips, as well as full COF information with all pin connections explained clearly for practical understanding. This data is especially published for technicians and new learners, so they can easily understand panel behavior, signal flow, and perform accurate fault finding during repair work.

Side COF Function

Side COF plays a critical role in the panel operation, as it is responsible for both voltage distribution and signal transmission across the display. It takes driving signals from the main control section and distributes them line-by-line to the panel, ensuring proper pixel activation and image formation. Along with signal flow, it also manages key voltages like VGH, VGL, and VCOM, which are essential for driving the TFT cells correctly. If any side COF becomes weak or faulty, it only affects the specific portion of the screen it controls, causing issues like lines, half display, or no image on one side. This makes side COF a very sensitive and important component in panel-level fault diagnosis and repair work.

V500DJ6-QE1 T4 Panel Scaler Test Points-R

In the image below, you can see the right-side scaler strip of the V500DJ6-QE1 T4 panel, where all important test points are clearly marked for practical reference. This section includes key voltage lines and signal paths that are essential for proper panel operation and troubleshooting. By following these test points, technicians can easily check voltage presence, trace signal flow, and identify faults in the scaler area during repair work. This visual reference helps in understanding the real working condition of the panel and makes fault finding more accurate and efficient.

V500DJ6-QE1 T4 Panel Scaler Test Points-L

In the image below, you can see the left-side scaler strip of the V500DJ6-QE1 T4 panel, where all important test points are clearly marked for accurate troubleshooting. This section also carries essential voltage lines and signal paths required for proper panel operation. By checking these points, technicians can easily verify voltage levels, trace signal distribution, and detect faults in the left section of the panel. This reference image helps in comparing both sides of the panel and makes diagnosis more precise during real repair work.

NT61303H-C52A2B COF Data 3 Test Points Overview

In the image below, you can see the complete COF data layout of the V500DJ6-QE1 T4 panel, where all COF test points along with both left and right scaler strip test points are combined in a single detailed view. This complete image provides a full reference of voltage lines, signal paths, and panel driving points, making it easier to understand the overall structure of the panel. By using this NT61303H-C52A2B COF Data 3 reference, technicians can quickly identify faults, compare readings, and perform accurate troubleshooting with a clear visual understanding of the entire panel system.

V500DJ6-QE1 T4 Panel Pin Description

• Pin 1 VGH +26.3V

  This voltage is used to support the gate driving section of the TFT panel and is responsible for proper high-level switching control. VGH is essential for turning the pixel lines ON correctly during display operation. If this voltage is missing or low, the screen may show no display, weak image, or complete panel failure.

• Pin 2 VGL -7.8V

  This voltage is used for the gate low driving line of the TFT panel and works opposite to VGH. It helps in turning the pixels OFF properly by providing negative voltage control to the gate driver section. If this voltage is missing or unstable, the panel may show dim display, flickering lines, or complete image distortion.

• Pin 3 VDD 3.3V

  This voltage is used as the main logic supply for the panel control circuits. It powers the timing controller and other low-voltage processing sections inside the panel. If this 3.3V line is missing or unstable, the panel may fail to start, show no display, or remain stuck in a dead condition.

• Pin 3 VDD 3.3V

  This voltage is used as the main logic supply for the panel control circuits. It powers the timing controller and other low-voltage processing sections inside the panel. If this 3.3V line is missing or unstable, the panel may fail to start, show no display, or remain stuck in a dead condition.

• Pin 5 STV 0.03V

  This line is the start pulse signal for the panel scanning process. It controls the vertical timing operation and helps the driver IC to start row-by-row addressing of pixels. If this signal is missing or unstable, the screen may show no display, incorrect scanning, or vertical lines with distorted image.

• Pin 6 CKV +1.8V

  This is the clock signal line for the panel scanning system and plays a key role in synchronization of data shifting. It controls the timing pulses that drive the gate driver section step by step. If this voltage is missing or unstable, the panel may show flickering, no display, or improper line scanning on the screen.

• Pin 7 OE1 +1.1V

  This line is used as an output enable control signal for the panel driving section and helps in controlling the activation of pixel data flow. It works as a switching control that allows the gate driver and data driver circuits to operate in proper timing sequence. If this signal is weak or missing, the panel may show partial display, no image, or unstable screen behavior with incorrect line activation.

• Pin 8 OE2 +1.1V

  This line works as a secondary output enable control signal for the panel driving system and supports synchronized data flow in the display section. It helps in controlling the activation timing of pixel driving circuits along with OE1 to ensure proper image formation. If this voltage is unstable or missing, the panel may show half display, distorted image, or complete no display condition depending on the affected section.

• UD +3.3V / 0V

  This line is used as an up-down control signal for the panel driving system and plays an important role in scan direction control. It helps the panel decide the proper sequence of row addressing during image display processing. When this signal toggles correctly between 3.3V and 0V, the screen runs normal scanning without distortion. If this line becomes stuck or unstable, the panel may show inverted display, misaligned image, or improper vertical scanning behavior.

• R STVR 0.04V

  This line is part of the vertical start/reset timing signal used in the panel scanning system. It helps control the proper reset sequence of the gate driver during frame operation, ensuring each new frame starts correctly. If this signal is too low, missing, or unstable, the panel may show no display, broken vertical scanning, or irregular image timing issues on the screen.

• V VCOM +6.6V

  This line is the common voltage reference for the TFT panel and plays a very important role in pixel balancing. It helps maintain proper charge distribution across the display pixels so the image stays stable and flicker-free. If VCOM voltage is incorrect or unstable, the screen may show flickering, washed colors, brightness issues, or complete uneven display on the panel.

Technical Opinion

While working on side COF, extreme care is required because during handling the VGH and VGL lines often get short or unstable, which leads technicians to bypass the faulty section. The correct method is to properly isolate the fault by cutting from both glass side and COF side, then bypassing it in a controlled way instead of simply jumping a single broken line. In many cases, technicians directly place a jumper on a single broken track, which is not a proper repair method and can cause repeated failure later. Signal points should always be checked on the IC side for accurate diagnosis, while voltage points can be verified easily with a multimeter. Proper signal tracing on the circuit side is essential for reliable and long-lasting repair results.

Conclusion – NT61303H-C52A2B COF Data 3

In conclusion, NT61303H-C52A2B COF Data 3 provides a complete and practical reference for understanding the V500DJ6-QE1 T4 panel COF structure, including both scaler strip test points and detailed pin voltage descriptions. This guide helps technicians to clearly identify signal flow, voltage distribution, and panel driving behavior in real repair situations. With proper understanding of this data, fault finding becomes more accurate and repair work becomes more reliable, especially when dealing with side COF and critical panel signals.

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