In today’s post, I will provide you the SM4186 IC Pinout Details Datasheet and Voltage Chart which is specially used by technicians for LED TV black screen problems. SM4186 IC is a popular choice when it comes to diagnosing & repairing voltages such as CKV, VGL, VGH, AVDD, and VCOM.
In the next section, I have mentioned all the details related to SM4186 IC Pinout details Datasheet and Voltage Chart. If you want to know about the SM4186 IC Pinout details Datasheet, scroll below to read the shared information.
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How to repair the LED TV black screen problem using SM4186 IC
Table of Contents
In LED TV’s black screen problem occurs when the panel does not have CKV, AVDD, VGH, VGL, and VCOM voltages. In this case, while repairing, it is generally assumed that DC to DC converter circuit is in safety mode. This assumption can be proved true if there is a short circuit in COF or Panel driver circuit.
To improve the Graphics quality of LED TV, two sets of LEDs having multiple gate driver (COF) circuits are placed between the panels. The DC-to-DC converter circuit goes into safety mode in the presence of short circuit in the driver or output circuits.
Here the voltage supply to the short-circuited driver circuit is stopped by disconnecting certain CKV connections of the panel.
When the DC to DC converter circuit becomes active, one part of the panel is fully activated. Now light graphics will be visible on the screen so that the problem of the black screen can be solved by finding the CKV connections from the figure and data of SM4186 IC.
SM4186 IC Datasheet Pinout Details Datasheet and Voltage Chart
Here I have explained all the SM4186 IC Pinout voltage details according to the IC pin number. To understand the SM4186 IC pin number, you can see the below image.
1. AVDD 15 Volts
2. 12 AVDD Switch
6. 5 Volts
7. 1.8 Volts
9. 3.3 Volts
10. 1.8 Volts
12. Power Supply 12 volts
13. 3.3 Volts
15. 5 volts
16. Reset Pin
18. Enable
19. SDA Serial Data
20. SCL Serial Clock pulse
23. 3.3 Data
25. STV Vertical signal
26. CPV1 – 1.6 Volts
27. CPV2 – 1.6 Volts
29.AVDD 15Volts30. 12 Volts Power Supply
31. VOFF (VGL) – – 9.5 Volts
32. -7.5 VOLTS
33. -7.5VOLTS
35. CKV 8.4 VOLTS Vertical Clock Pulse
36. CKV1 8.4 VOLTS Vertical Clock Pulse
37. CKV3 8.4VOLTS Vertical Clock Pulse
38. CKVB2 8.4VOLTS Vertical Clock Pulse
40. CKV2 8.4VOLTS Vertical Clock Pulse
41. VON (VGH) 30 VOLTS
42. SUPPLY 12 Volts here
46. VCOM (Common Voltage for all thin film Transistor)
47. SVCOM48. SVCOM 5.5 VOLTS
49. SVCOM 5.5 VOLTS50. 7.4 VOLTS
51. 7.5 VOLTS52. 7.5 VOLTS
54. 12 VOLTS SUPPLY here56. 12 VOLTS SUPPLY here
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FAQ of SM4186 IC Pinout Details Datasheet and Voltage Chart
How To Repair LED TV screen problem SM4186 ic CKV Lines
In LED TV’s black screen problem occurs when the panel does not have CKV, AVDD, VGH, VGL, and VCOM voltages. To improve the Graphics quality of LED TV, two sets of LEDs having multiple gate driver (COF) circuits are placed between the panels. The full process of repairing is explained in the post above.
How to find SM4186 IC Pinout Details Datasheet and Voltage Chart
All the information related to the SM4186 IC Pinout Details Datasheet and Voltage Chart is shared in today’s post. Scroll up the article to read the details.
How to identify if IC is faulty or not?
Using analog multimeter dc scale x10 or x1. Probe – to GND & probe + to ckv line test point, you can identify if IC is faulty or not. Check if dc scales at the multimeter and Power on the tv with the remote, if any movement of the needle of the multimeter to the right then it is immediately off/goes down to the left, which means ic is in safety mode. But if nothing happens, ic is faulty.
