Here’s a **detailed datasheet-style breakdown** for the **SM4053 DC-DC Buck Converter IC**, synthesized from common buck converter ICs with similar specs (exact parameters may vary by manufacturer). For the official datasheet, check **Silan Microelectronics** or other vendors.
---
### **SM4053 DC-DC Buck Converter IC**
#### **Absolute Maximum Ratings**
| Parameter | Value | Unit |
|-------------------------|----------------|------|
| Input Voltage (Vin) | 4.5 to 40 | V |
| Output Voltage (Vout) | 1.25 to 37 | V |
| Output Current (Iout) | 2.5 (max) | A |
| Switching Frequency | 150 to 500 | kHz |
| Operating Temperature | -40 to +85 | °C |
| Junction Temperature | -40 to +125 | °C |
---
### **Electrical Characteristics** (Typical @ 25°C, Vin=12V, Vout=5V)
| Parameter | Min | Typ | Max | Unit |
|-------------------------------|------|------|------|------|
| **Input Voltage Range** | 4.5 | – | 40 | V |
| **Feedback Voltage (Vref)** | 1.20 | 1.25 | 1.30 | V |
| **Quiescent Current (Iq)** | – | 3 | 5 | mA |
| **Efficiency** (12V→5V@2A) | – | 92 | – | % |
| **Oscillator Frequency** | 130 | 150 | 170 | kHz |
| **Current Limit** | 2.8 | 3.2 | 3.6 | A |
---
### **Protection Features**
1. **Overcurrent Protection (OCP)**
- Threshold: ~3.2A (hiccup mode or latch-off).
2. **Thermal Shutdown (TSD)**
- Activates at ~150°C, resumes at ~120°C.
3. **Undervoltage Lockout (UVLO)**
- Disables IC if Vin < ~3.5V.
### **Pin Configuration & Functions**
| Pin | Name | Function |
|-----|-----------|----------|
| 1 | **VIN** | Input voltage (4.5–40V). |
| 2 | **GND** | Ground reference. |
| 3 | **FB** | Feedback (connect to resistor divider for Vout adjustment). |
| 4 | **EN** | Enable (HIGH: ON, LOW: OFF; float for auto-start). |
| 5 | **SW** | Switch node (connects to inductor + diode). |
---
### **Typical Application Circuit**
```
Vin (12V) ────┬───── SM4053 ────▶ Vout (5V)
│ │
[10µF] [22µH]
│ │
GND [Schottky Diode]
└─[FB Resistors: R1=3k, R2=1k]
```
- **Output Voltage Calculation**:
\[
V_{out} = V_{ref} \times \left(1 + \frac{R1}{R2}\right) = 1.25V \times \left(1 + \frac{3k}{1k}\right) = 5V
\]
---
### **Layout Guidelines**
1. **Minimize SW Node Loop Area** to reduce EMI.
2. **Use Low-ESR Capacitors** (Ceramic for Cin/Cout).
3. **Thermal Management**
- Connect **GND** pin to a large copper pour.
- Add thermal vias if high current (>1A).
---
### **Common Issues & Solutions**
| Problem | Likely Cause | Fix |
|-----------------------|-----------------------|-----|
| **No Output** | EN pin floating/low | Tie EN to Vin or >1.5V. |
| **Overheating** | Poor PCB layout | Improve grounding/heat sinking. |
| **Output Ripple** | Weak Cout/inductor | Use 22µF+ low-ESR cap. |
---
### **Where to Find Official Datasheet**
- Search **"SM4053 datasheet PDF"** on:
- **Silan Microelectronics** (likely manufacturer).
- **LCSC/Alibaba** (for distributor copies).
- **DatasheetArchive.com**.
#IMRANASHRAFBOOK
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LCD and LED TV panels are delicate components that can develop various issues over time. Understanding how to diagnose and repair these panels can save costs and extend the TV’s lifespan. In this guide, we’ll cover common panel problems, repair techniques, and essential tools needed for professional LCD/LED TV panel repair.
1. Understanding LCD & LED TV Panel Structure
Before repairing, it’s crucial to understand how an LCD/LED panel works. The main components include:
✅ TFT (Thin Film Transistor) Panel – Controls the pixels.
✅ LED Backlight – Provides brightness and illumination.
✅ COF (Chip on Film) – Manages image processing.
✅ T-Con (Timing Controller) Board – Controls panel signals.
✅ Power Supply Board – Regulates power flow.
2. Common LCD/LED TV Panel Problems & Fixes
A. No Display / Black Screen
Symptoms: TV powers on, but the screen is blank.
Possible Causes:
- Backlight failure
- T-Con board issue
- Loose COF connection
Fixes:
✅ Use a flashlight to check if the display is working but the backlight is off.
✅ If the backlight is faulty, replace LED strips.
✅ Test the T-Con board and ribbon cables for faults.
B. Vertical or Horizontal Lines on Screen
Symptoms: Thin or thick lines appearing on the display.
Possible Causes:
- Loose COF bonding
- Faulty T-Con board
- Damaged display panel
Fixes:
✅ Re-seat and clean the COF ribbon cables.
✅ Check the T-Con board and LVDS cables.
✅ If lines persist, the panel may need replacement.
C. Dim or Flickering Screen
Symptoms: TV screen brightness is low or flickers.
Possible Causes:
- Weak LED backlight
- Faulty power supply
- Loose backlight connector
Fixes:
✅ Open the panel and test LED strips using an LED tester.
✅ Replace weak LED strips or power supply components.
3. Essential Tools for LCD/LED Panel Repair
To repair screen panels, you need professional tools:
🔹 Multimeter – For voltage testing
🔹 LED Tester – To check backlight strips
🔹 COF Bonding Machine – To fix loose COF ribbons
🔹 SMD Rework Station – For chip-level repairs
🔹 T-Con Board Tester – To diagnose display faults
4. When to Repair vs. Replace a Panel
- Repair if: The problem is with backlight strips, COF bonding, or minor T-Con issues.
- Replace if: The LCD screen itself is cracked, shattered, or has liquid damage.
5. Preventive Maintenance Tips
✅ Keep the TV in a cool, dust-free environment.
✅ Avoid pressing or touching the panel too hard.
✅ Use a surge protector to prevent voltage fluctuations.
✅ Clean the screen with a soft microfiber cloth (no harsh chemicals).
Conclusion
LCD/LED TV panel repairs require technical knowledge and the right tools. By diagnosing issues correctly, technicians can save time and money while providing quality repairs.
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6: What is Level Shifter and It's Working Guide Line
7: Source Drive and Gate Drive and it's Working Principle
8: Types Of Screens Faults
9:Know How About COF and COG
10: Panel Faults and It's Possible Solution
11: What is the Tab Bonding machine
12: Tab Bonding Machine
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TP.HV553.PC821 "4K 8GB/1GB 50&55"" MARKET COMMON REMOTE 4K"
T.HV553.81 "4K HYUNDAI 65"" INCHES 4K"
T.HV553.81 "4K VIDEOCON 65"" REMOTE 4K"
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TP.HV553.PB801 "VU REMOTE 43"" 4K"
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TP.SK708D.PC821 SUMSUNG REMOTE 55&50 4K
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TP.SK518D.PB818 MARKET COMMON REMOTE 512MB/4GB 1920*1080 & 1366*768
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N.M338.801 1366*768 8GB /1GB
N.M358.818 1366*768 SUMSUNG REMOTE
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TV Service Code
T.VST29.61.C - Menu, 1147
2. T.VST29.03 - Menu, 1147
3. SKR.801 - Menu, 1147
4. SKR03 - Menu, 1147
5. CV182L-B - Menu, 2580
6. T.VST59.62 - Menu, 1147
7. T.VST59.A5 - Menu, 1147
8. T.VST59.S73 - Menu, 1147
9. TP.VST59.P83 - Menu, 1147
10. T.MT8223.33 - Menu, 1147
11. CV181L-Y - Menu, 2580
12. TR.85.03 - Menu, 1147
Menu 1008
Menu 2008
13. CVMV26L-A-20 - Menu, 2580
14. CV309H-V - Menu, 2580
15. TP.VST59.PB819 - Menu2580
16. T.MS18VG.71A - Menu, 1147
17. CV56BH.242 - Menu, 2580
18. T.MS.18VG81B - Menu, 1147
19. TP.MS.608.P82 - Menu, 1147
20. T5964.81 - Menu, 1147
21. T.VST59.031 - Menu, 1147
22. VS.TP53U71.2 - Input, 208 or 2008
23. T.VST29.61.C - Menu, 1147
24. VS.TP53U61.2 - Input, 1147
25. TP.HV320/PB813 - Menu, 1147
26. T.VST.TP53L62.2 - Menu, 1147
27. TP.HV320/PB813 - Menu, 2580
28. 350016386 - Menu, 2008
29. 35017414 REV-01 - Menu, 2008
30. JUG7.820.531-3 - Menu, 1147
31. 5800-A8M260-0020 - Menu, 1147
32. 35016445 REV-01 - Menu, 1147
33. TP.MS.338.PC821 - Menu, 2580
34. LAD.MV56U.A36 - Menu, 1147
35. LAD.MV56U.A48 - Menu, 1147
36. LAD.MV56U.A75 - Menu, 1147
37. LAD.MV56U.B48 - Menu, 1147
38. LAD.MV56U.C36 - Menu, 1147
39. LAD.MV59S.I - Menu, 7710
40. LAD.MV59S.G - Menu, 7710
41. LAD.MV59S.Q - Menu, 7710
42. LAD.MV9.R - Menu, 7710 or 710
43. LAD.MV9.P - Menu, 1147
44. T.VST29.03 - Menu, 1147
45. T.V56.03 - Menu, 1147
TBI.T07-MABE HG - Menu or Contrast,1950 or 9735
TP.MS1306.PB772 - Menu or Contrast,1950 or 9735
T.VST59.031.A81A8 - Menu, then 1147
VS.TP53U61.2 - Input, then 208ed Tv
SP208ESA HK-7050A-V208- Menu,7050
SOURCE / INPUT and 6434
2. SOURCE / INPUT and 3195
3. SOURCE / INPUT and 2283
4. SOURCE / INPUT and 3138
5. SOURCE / INPUT and 2527
6. SOURCE / INPUT and 2585
7. SOURCE / INPUT and 2580
8. SOURCE / INPUT and 3137
9. SOURCE / INPUT,7343
10. SOURCE / INPUT button,208
11. SOURCE / INPUT and 1147
12. SOURCE / INPUT and 2580
13. SOURCE / INPUT and 0000
14. SOURCE / INPUT and 308
TBI.T07-MABE HG - Menu or Contrast,1950 or 9735
TP.MS1306.PB772 - Menu or Contrast,1950 or 9735
T.VST59.031.A81A8 - Menu, then 1147
VS.TP53U61.2 - Input, then 208ed Tv
SP208ESA HK-7050A-V208- Menu,7050
SOURCE / INPUT and 6434
2. SOURCE / INPUT and 3195
3. SOURCE / INPUT and 2283
4. SOURCE / INPUT and 3138
5. SOURCE / INPUT and 2527
6. SOURCE / INPUT and 2585
7. SOURCE / INPUT and 2580
8. SOURCE / INPUT and 3137
9. SOURCE / INPUT,7343
10. SOURCE / INPUT button,208
11. SOURCE / INPUT and 1147
12. SOURCE / INPUT and 2580
13. SOURCE / INPUT and 0000
14. SOURCE / INPUT and 308
Code15. MENU, 7168
• Code16. MENU, 9301
• Code17. MENU, 7050
• Code18. MENU, 8893
• Code19. MENU, 6181
• Code20. MENU, 8896
• Code20. MENU, 8896
• Code21. MENU, 5880
• Code22. MENU, 8593
• Code22. MENU, 8593
• Code23. MENU, 4725
• Code24. MENU, 8093
• Code25. MENU, 1234
• Code26. MENU, 7710
• Code27. MENU, 7101
• Code28. MENU, 7343
• Code29. MENU, 0101
Code22. MENU, 8593
• Code23. MENU, 4725
• Code24. MENU, 8093
• Code25. MENU, 1234
• Code26. MENU, 7710
• Code27. MENU, 7101
• Code28. MENU, 7343
• Code29. MENU, 0101
• Code30. MENU, 8202
• Code31. MENU, 208
• Code32. MENU, 8500
• Code33. MENU, 9380
• Code34. MENU, 9883
• Code35. MENU, 2580
• Code36. MENU, 2588
• Code37. MENU, 9735
• Code38. MENU, 9527
• Code39. MENU, 9385
• Code40. MENU, 2387
• Code41. MENU, 2383
• Code42. MENU, 2008
• Code43. MENU, 1999
• Code44. MENU, 2888
• Code45. MENU, 2611
• Code46. MENU, 2880
• Code47. MENU, 2508
Haier LED TV Factory Setting Code
Menu or Exit > 1999 > OK
Menu > 4578
Menu > 8823
Menu > 8202
Menu> 1147
Orient LED TV Factory Setting Code
Press the Source Button, then 2588
Press the Source Button, then 2580
Input Button > 2580
Input Button > 2588
CHANG HONG LCD TV Service Menu Code
• Menu > 1125 • Input > 42580
• Input > 3138 • Menu >2580
• Menu > 1149 • Menu > 0817
• Menu > 0816
:
China Universal Board/ Jumper Board Service Menu Code:
Menu 1147
Menu 1150
Menu 1167
Menu 1185
Menu 1187
Menu 1197
Menu 1199
Menu 1950
Menu 1973
Menu 1999
Menu 2008
Menu 2383
Menu 2387
Menu 2508
Menu 2580
Menu 2588
Menu 2611
Menu 2880
Menu 2888
Menu 0000
Menu 208
Menu 0101
Menu 710
Menu 1234
Menu 4711
Menu 4725
Menu 5880
Menu 6181
Menu 7050
Menu 7168
Menu 7343
Menu 7710
Menu 8093
Menu 8500
Menu 8202.toshiba
Menu 8593
Menu 8893
Menu 8896
Menu 9301
Menu 9380
Menu 9385
Menu 9527
Menu 9735
Menu 9883
Input 1147
Input 2580
Input 0000
Input 208
Source/Input 308
Input 3195
Source 0000
Source 2283
source 2285
Source 2580
Source 2583
Source 2585
Source 2587
Source 3137
Source 3138
Source 3195
Source 6483
Source 7343
Mute 6483
Service Menu Code with Board Name:
VS.Tp53U71.2 Input 208
VS.Tp53U61.2 Input 208
VS.TP56L62.2 Menu 1147
T.VST59.031 Menu 1147
T.R83.031 Menu 1147
T.R85.031 Menu 1147
TP.VST59s.PB813 Menu 1147
TP.HV320.PB801 Menu 1147
TR.85.03 Menu 1147
T.VST59.031 .A81 A8 Menu 1147
T.V56.03 Menu 1147
T56J.11.2 Menu 1147, Input 2580, Input 0000, Menu 8896, AV 208, AV 308
T.VST29.03 Menu 1147
T.H11.675 Input 336
T.H11.816 Input 336
SKR.03 Menu 1147
SKR.801 Menu 1147
T5964.81 Menu 1147
TP.MS338.PC821 Menu 1147
LAD.MV59S.G Menu 7710
T.VST29.61C Menu 1147
5800-A8M260-0020 Source 3195
350016386 Menu 2008
CVMV26L-A-20 Input 2580
CV182L_B Input 2580
SP208ESA HK-7050A-V2.08-E Menu 7050
35017414 REV-01 Menu 2008
T.MS18VG.72 Menu 1147
T.VST59.A5 Menu 1147
CV181L-Y Input 2580
CV9202L-S Input 2580
T.VST.29.61C Menu 1147
T.VST59.62 Menu 1147
JUG7.820.531-3 Input 3138
35016445 REV-02 Menu 2008
T.VST59S.73 Menu 1147
TP.VST59.P83 Menu 1147
T.MT8223.3B Menu 1147
T.MS.18VG.81B Menu 1147
T.MS18VG.71A Menu 1147
40-T31TOT-MAB2HG Menu. Contrast 1950 or 9735
TP.MS1306.PB772 Menu, Picture, contrast. 9735
CV309H-X Source 2580
TP.VST59.PB819 Menu 2008
CV56BH.Q42 Input 2580
TP.MS608.P82 Source/Input 1147
CV338H- A32 Menu 1147CV338H- A42 Menu 1147CV338H- A50 Menu 2580
CV628H-T42 Menu 1147
CV628H-B42 Menu 1147
CV950H-A42 Source 2580
DP.V53RL.8136 Menu 1147
DP.V53RU.8136 Menu 1147
ZP.V53RL.671 Menu 1147
MSD338ST V5.0 Source 2580
TP.HV310.PB801 Menu 1147
TP.HV320.PB801 Menu 1147
TP.HV510.PC821 Source 2580
TP.HV530.PC821 Source 2580
TP.MS338.PB801 Menu 1147
TP.MS338.PB802 Menu 1147
TP.MS338.PC821 Menu 1147
TP.MS338.PB822 Menu 1147
TP.MS338.P818 Menu 1147
TP.MS338.PB802 Menu 1147
TP.MS338.PB818 Menu 1147
TP.MS358.PB801 Menu 1147
TP.MS608.PB831 Menu 1147
Tp.MS608.P83 Menu 1147
Tp.MS608.P82 Input/Source 1147
TP.MS628.PC821 Menu 1147, Menu 2580
TP.MS628.PB803 Menu 1147, Menu 2580
TP.MS628.PB831 Menu 1147
TP.MS628 PD65 Menu 1147, Menu 2580
TP.MT5505.PC801 Menu 1147
TP.MT5507.
Cof eBook Pages Screenshot 
