Compatible IC Numbers for LG CRT TV Kit – CRT TV Main IC Substitutes

 Title: CRT TV Main IC Substitutes – Compatible IC Numbers for LG CRT TV Kit (Detailed Guide)

Introduction:
CRT (Cathode Ray Tube) TVs may seem like old technology today, but they still hold value for many users and technicians, especially in rural areas or small repair shops. Among CRT TV brands, LG CRT TVs are widely known for their durability and reliable picture quality. However, when repairing these TVs, one of the most common challenges is finding compatible or substitute ICs (Integrated Circuits) for the main board.

In this post, we will cover LG CRT TV main IC substitutes, discuss their functions, pin compatibility, and provide a detailed guide for identifying equivalent ICs that work in CRT TV kits. This will be a valuable resource for electronics repair engineers, technicians, and hobbyists.

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Understanding the Main IC in LG CRT TVs

The Main IC (also known as the jungle IC or system IC) in a CRT TV is responsible for multiple operations such as:

• Video and audio signal processing

• Synchronization and deflection control

• Color decoding (PAL/NTSC/SECAM)

• On-Screen Display (OSD) control

Because of these functions, choosing a correct replacement IC is crucial for maintaining picture quality and avoiding horizontal or vertical sync issues.

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Common LG CRT TV Main IC Models

Here are some commonly used main ICs in LG CRT TVs:

Original IC Number	Function / Description	Compatible Substitute ICs
TDA9381PS/N2/3/1908	Jungle IC (Video/Audio Processor)	TDA9384PS/N3/4/1908, TDA9381PS/N2/3/1910
TDA9384PS/N3/4/1908	Main Processor for 21" LG TVs	TDA9381PS/N2/3/1908, TDA9381PS/N2/3/1910
TDA9370PS/N2/AI1225	Used in older LG 21” TVs	TDA9370PS/N2/AI1230, TDA9371PS/N2/AI1240
TDA9381PS/N2/3/1910	Multi-system Jungle IC	TDA9384PS/N3/4/1908, TDA9381PS/N2/3/1908
TDA9373PS/N2/AI1241	Main IC for LG Flatron CRT TV	TDA9370PS/N2/AI1225, TDA9371PS/N2/AI1240
TDA9384PS/N3/4/1908	Common IC in LG Universal Kit	TDA9381PS/N2/3/1908, TDA9381PS/N2/3/1910
LA76810A	Video/Chroma/Sync IC	LA76818A, LA76814A, LA76812A
LA76931	Jungle IC for newer LG CRT models	LA76933, LA76935, LA76938

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Important Tips for Selecting Substitute ICs

1. Check Pin Configuration:
   Even though many ICs are compatible, the pin configuration might differ slightly. Always compare datasheets before replacement.

2. Use Same IC Series:
   For best performance, stick to ICs from the same family or series, like replacing TDA9381 with TDA9384.

3. Check System Compatibility:
   Ensure that the substitute supports the same TV system standard (PAL, NTSC, or SECAM).

4. Firmware and EEPROM Data:
   Sometimes, even with a compatible IC, you might need to reprogram or replace the EEPROM (24C08, 24C16, etc.) to match the software.

5. Check Power Supply Voltage:
   Verify that the VCC and ground pins match and that the IC supports the same voltage range.

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CRT TV Kit and Universal Board IC Information

Many LG CRT TV repair kits come with universal main boards, which are designed to work with several ICs. Common ICs in these kits include:

• TDA9381PS/N2/3/1908 (Most popular in 21-inch kits)

• TDA9384PS/N3/4/1908 (Used in slim CRT models)

• TDA9370PS/N2/AI1225 (Older models)

• LA76931 / LA76933 (Newer flat CRT TVs)

When using a universal CRT kit, always ensure that the IC used matches the original tuner type, deflection yoke, and power supply.

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Common Problems When Using Substitute ICs

Problem	Possible Cause	Solution
No display	EEPROM not matched	Reprogram or replace EEPROM
Color distortion	Mismatch in color decoder IC	Check system format (PAL/NTSC)
Vertical collapse	IC pin mismatch or wrong IC	Verify pin configuration
No sound	Audio output pin mismatch	Check audio amp IC and connection

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Helpful Resources for Technicians

• Datasheets: Always download datasheets from trusted semiconductor sources (like NXP, Philips, or Toshiba).

• Service Manuals: Use LG CRT TV service manuals to confirm circuit layouts.

• Universal Board Manuals: Most CRT TV kits come with IC compatibility charts.

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Conclusion

Finding the right substitute IC for an LG CRT TV can make the difference between a successful repair and wasted effort. Always verify compatibility by comparing the datasheets, pinouts, and voltage ratings. Universal CRT kits with ICs like TDA9381PS, TDA9384PS, or LA76931 are the most common choices for replacement.

This guide will help you confidently replace ICs in LG CRT TV kits, ensuring stable performance and long-lasting results.

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Keywords: LG CRT TV IC, CRT TV Kit IC Substitute, TDA9381PS compatible IC, TDA9384PS replacement, LA76931 substitute, CRT TV jungle IC, Universal CRT board IC list, LG CRT TV repair guide, CRT main IC chart.