The main positive power line. Connect this to a stable DC rail (typically the 12V or 24V line found on the main power supply output).
| Parameter | Specification | | --- | --- | | | 10V – 30V DC | | Recommended Input Voltage | 10V – 24V DC | | Output Voltage | 7.5V – 9.5V DC | | Output Current Range | 10mA – 1000mA | | LED Strip Compatibility | 15 – 24 inches | | Enable Signal (ENA) | 3.3V – 5V TTL (High = On) | | Dimming Input (DIM) | Analog voltage (0 – 3.3V typical) | | Driver IC | DF6113 | | MOSFET Transistor | PTD 11N20C | | Schottky Diode | SS210 | | PCB Dimensions | 70mm (L) x 20mm (W) | | Operating Temperature | -35°C to 85°C |
[Main Display PCB] [GYD-9E Driver] + 12V / 24V Power Rail ------------------------> VIN Pin (Red) + Backlight Enable BL_ON -----------------------> ENA Pin (Yellow) + Brightness Control PWM/ADJ -------------------> DIM Pin (Yellow) + System Ground GND ------------------------> GND Pin (Black) 1. Disassembly and CCFL Removal gyd-9e datasheet
The (also known alternately as the YGD-9E or CJY-20H70 ) is a highly versatile, universal constant-current LED driver board designed to replace legacy Cold Cathode Fluorescent Lamp (CCFL) inverters in 15-inch to 24-inch LCD monitors and televisions . Centered around the robust DF6113 step-down/buck-boost PWM controller IC , this board converts wide-range DC input voltage into a stabilized low-voltage output optimized for driving aftermarket LED strips.
The brightness adjustments vector. This pin varies the constant current output dynamically. The active range typically spans from 0.8V (lowest brightness) up to 2.5V or 5V (maximum brightness). The main positive power line
Detailed technical specifications are crucial in this document. This could encompass electrical characteristics (like input/output voltage ranges, current ratings), physical dimensions, and possibly its operating temperature range.
, I can explain typical parameters such as: Disassembly and CCFL Removal The (also known alternately
Affix the GYD-9E module inside the monitor housing using non-conductive double-sided adhesive tape or dedicated plastic mounting standoffs. Make sure the board is entirely clear of the metal chassis to prevent short circuits. 🔍 Troubleshooting and Thermal Considerations
While datasheets are comprehensive, interpreting and applying the information can sometimes be challenging. Variability in component manufacturing, the evolving nature of technology, and the specific requirements of different applications mean that designers must often consult additional resources and perform their own testing to ensure the GYD-9E meets their needs.
Even though the GYD-9E rates 9 A, motor startups can surge to 40+ A. Using it to drive a contactor extends the SSR’s life.
On the monitor's power/logic board, use a multimeter to map out a steady DC voltage rail (10V-30V), system ground, backlight enable pin ( Von/offcap V sub o n / o f f end-sub ), and the brightness adjustment line ( Vadjcap V sub a d j end-sub