Those are the ones. Any idea of the chip used?
MP2307 is the chip
Raj
On 09/08/2022 12:49 PM, Ashhar Farhan
wrote:
I swear I had sent an email on this an hour ago...
Anyway, I replaced replaced the LM338 with a
switching regulator. This one was very inexpensive, less than
a dollar. It is also very efficient and small. Unfortunately,
I dont know what it is called!
I am attaching the pictures. There is a tiny pot
on it that controls the output voltage. I added a 22 ohms, fat
resistor to the output pins and adjusted the output to 5.4v.
Then I took out the LM338 and installed this. The ground is a
thick and very short connection to a mounting hole (I used
desoldering braid). The input and output is wired to the
LM338's pcb holes.
I am running this for a while before declaring
victory.
If someone can identify the chip and the
regulator, I will be grateful.
