The SM4186 IC is widely used in the LSC320AN10H03 LCD panel manufactured by Samsung, as well as the entire LSC320AN10-XXX series LCD TV panels.
Article Overview:
- SM4186 IC Schematic Circuit Diagram for Samsung LCD Panels
- What is the function of the SM4186 IC in an LCD Panel?
- Equivalent information and substitute data for SM4186 IC
- Pinout, pin function, and detailed pin voltage charts
- SM4186 IC PDF Datasheet with Schematic
The SM4186 IC is a unique component for supplementary power management and signal processing in Samsung LCD TV panels. This IC integrates several voltage regulator circuits: the VGH charge pump (voltage boost converter), the VGL charge pump (buck converter), and integrated AVDD, HVAVDD, and VCOM circuits.
[Related Post: RT8293AL IC Pinout and Circuit Diagram]
I have personally analyzed the Samsung LCD panel to design this schematic circuit diagram. This detailed guide will be an essential tool for any technician involved in Samsung LED/LCD Panel repair.
SM4186 IC SCHEMATIC CIRCUIT DIAGRAM, PIN FUNCTION & VOLTAGE DETAILS
This diagram is specifically designed for the LSC320AN10-H03 panel. While circuit layouts may vary slightly across Samsung models, the pin configuration remains standard.
Schematic Circuit Diagram of SM4186 IC
Complete SM4186 IC Pinout, Signal Mapping, and Troubleshooting Voltage Chart for LSC320AN10-H03-6 Panels
SM4186 IC Pinout Voltage and Signal Details
To ensure precise repairs on Samsung LSC320AN10-XXX series panels, refer to the decoded signal and voltage values listed below. These specifications are essential for troubleshooting flickering issues and isolating gate driver faults. Use these measurements with a stable ground reference for the best results.
| Ref No. | Signal Name | Voltage / Role |
|---|---|---|
| 1 | VCS1 | 5.5V |
| 2 | FB_L | 5.5V |
| 3 | VCOM | 5.5V |
| 4 | HVDD | 7.5V |
| 5 | VON | 33V |
| 6 | CKVB2 | 8.4V |
| 7 | CKV2 | 8.4V |
| 8 | CKVB1 | 8.4V |
| 9 | CKV1 | 8.4V |
| 10 | STVP | 0V |
| 11 | VSS | 0V |
| 12 | VGL | -9.5V |
| 13 | CPV2 | 1.6V |
| 14 | CPV1 | 1.6V |
| 15 | STV | 5V |
| 16 | AVDD | 15V |
| 17 | 3.3V | 3.3V |
| 18 | 1.8V | 1.8V |
| 19 | AVDD | 15V |
Understanding SM4186 IC Signal Function and Voltage Reference
To effectively troubleshoot or repair display panels driven by the SM4186 IC, a clear understanding of its signal functions and voltage levels is crucial. Each reference point in the provided schematic diagram serves a specific purpose in panel operation, from generating stable supply voltages to managing gate-drive signals such as CKV and STV. Proper measurement at these points is the key to identifying faults such as display flickering, horizontal line artifacts, or total panel failure. Whether you are investigating the behavior of the protection pin or validating stable AVDD and VON levels, the data provided above serves as a reliable benchmark for professional diagnosis.
SM4186 IC-Based LSC320AN10-XXX Samsung Panel Troubleshooting and Repair Guide
In most LSC320AN10-H03 to H06 Samsung panels, internal short circuits often occur between the liquid crystal cell tracks or within the CKV signal lines. When such a short is detected, the SM4186 IC automatically activates its internal protection mode to prevent further damage to the circuit. This failure typically results in a black screen or persistent image flickering.
Repair Methodology:
In the provided schematic diagram, reference points 6, 7, 8, and 9 (corresponding to IC pins 35 through 40) manage the CKV1, CKVB1, CKV2, and CKVB2 signals. These signals are branched out to drive the gate driver circuits on both sides of the panel.
To repair the panel, first identify the section (either the ODD or EVEN row of liquid crystal cells) where the short circuit is located. By isolating the faulty side—specifically by cutting the tracks for CKV1/CKV2 or CKVB1/CKVB2—you can restore the image using the healthy section of the gate driver, provided there are no other critical failures in the SM4186 IC circuit. If the issue persists, ensure that you check the capacitors and other components related to the 17 reference voltage/signal points indicated in the Schematic Circuit Diagram for any shorts or damage.
Values of Fuse, Resistors, and Capacitors in SM4186 IC Schematic Circuit Diagram
Capacitors List:
C1 - 47µf 50V, C2 - 0.1µf 50V, C3 - 1µf 50V, C3B - 0.1µf 50V, C4 - 0.1µf 50V, C5 - 0.22µf 50V, C6 - 1µf 50V, C7 - 0.1µf 50V, C8 - 10µf 50V, C9 - 0.1µf 50V, C10 - 0.047µf, C11 - 01µf, C12 - 25µf 16V, C13 - 25µf 16V, C14 - 0.01µf, C15 - 10µf 16V, C16 - 0.1µf 16V, C17 - 0.1µf, C18 - 4.7µf 50V, C19 - 4.7µf 50V, C20 - 4.7µf 50V.
Resistors List:
R1 - 8.4KΩ, R2 - 6.7KΩ, R3 - 42KΩ, R3B - 17KΩ, R4 - 78KΩ, R5 - 1.3KΩ, R6 - 2.3KΩ, R7 - 13.4KΩ, R8 - 42KΩ, R9 - 6.4KΩ.
Inductors List:
L1 - 220µH, L2 - 100µH, L3 - SMD Inductor, L4 - 100µH, L5 - 100µH.
Equivalent Information of the SM4186 IC
LSC320AN10-XXX series Samsung LCD panel uses this IC. Substitution or the equivalent IC of SM4186 IC has yet to be found. If found, it will be published here immediately.
How do you make an LCD panel Short Killer? Circuit Diagram Here
No comments:
Post a Comment