Hakko FM-203 Dual Soldering Station Teardown W/ Temperature Control Key Bypass!
The Hakko FM-203
FM-202 and FM-203 Size Comparison
Click Here to See My Hakko FM-202 Teardown
Cover Off
Face Plate Off
Main Control Board M1285-A11 Removed Form Face Plate.
Mail Control Board B3403 (Renesas R5F21258SNFP R8C/25 Group) Datasheet
I attempted to back up the Hakko FM-203’s firmware form the Renesas R5F21258SNFP using the in-circuit headder, but unfortunately, it’s locked with an ID code. Consequently, I have no choice but to remove the 52 pin quad flat pack chip to read it in parallel mode, utilizing the Xeltek SuperPro 6100N or Xeltek Suprpro 7500 taking a chance that it is not protected. Once I acquire the required programming adapter a DX3010 or a GX3010, I will promptly extract the firmware from chip.
Heater Control Board
Temperature B2972 Control Card Key Bypass Place a thick Heatshrink over the Receivers PT1 & PT2
I also Place a Piece of Clear Scotch Tape over the speaker to quiet the beep down.
Hakko FM-203 Uses a Similar Heating Circuit M1285-A11 With Dual NEC 2SJ493’s (Datasheet) as the FM-202 for the D Port and Single For The S Port
The FX-951 Uses a Single 2SJ534 (Datasheet)
Here is a YouTube Video If the Hakko FM-203 Teardown Amazing I Speak In This Video!!
https://youtu.be/9JJvjJ5gGQw
Last Updated on August 15, 2023 by Steven Rhine