In this article, we will discuss the step-by-step process of modifying a 150-watt OCL driver for enhanced performance. The driver modification involves the use of final transistors, specifically the SC5200 and SD5200 types. This modification can be applied to the Socl 504 and Socl 506 systems, allowing users to customize their audio setup to their liking.
Step 1: Remove Lime Resistor
The first step in the modification process is to remove the lime resistor. This can be done by carefully unplugging it from its position on the PCB.
Step 2: Replace Resistor
Next, replace the lime resistor with a resistor of either 300 Ohm or 330 Ohm. This resistor will serve to enhance the performance of the driver.
Step 3: Remove Transistor Driver
Now, remove the transistor driver that is connected to the minus part. In this particular case, the driver is a tip32 transistor. Carefully lift the middle leg of the transistor from the PCB and remove it from the PCB hole.
Step 4: Connect Resistor to Transistor
After removing the transistor driver, connect the resistor to the tip42 transistor. The resistor should be planted in the same position where the tip32 transistor was previously located. Solder the connection securely.
Step 5: Modify the Driver
With the resistor securely connected, the driver modification is complete. The final transistor emitter foot should be connected to the collector leg of the adjacent transistor. Additionally, the base leg of the transistor should be connected to the base line as usual.
Step 6: Connect Emitter Leg
Connect the emitter leg of the final transistor to the speaker line. This connection will allow the speaker to receive the necessary voltage for optimal sound output.
Step 7: Connect Base and Collector Leg
Finally, connect the base leg of the adjacent transistor to the tip of the previously removed transistor. This connection should be made with the resistor that was installed earlier. Additionally, the emitter leg of the final transistor should be connected to the Min voltage from the driver. This connection can be made to either the collector or the Vcc leg.
Testing and Results
Once all the connections have been made, it is time to test the modified driver. Check the DC offset voltage to ensure it is at 0.00. Proceed to play music through the connected speaker and evaluate the sound quality.
If the transistors maintain a balanced level of heat and the sound output is satisfactory, then the modification has been successful. This modified driver can be used with Socl 504 and Socl 506 systems, providing users with enhanced audio performance.
In conclusion, this article has provided a detailed guide on how to modify a 150-watt OCL driver for optimized performance. By following the step-by-step process and making the necessary connections, users can achieve a customized audio setup that meets their requirements. Experiment with this modification and enjoy a superior audio experience.
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