There is a defect on the board with CPU SAF-C517A-LN, the verification method is described. Can't upload a clear picture of the box for some unknown reason. Possible porno detected with AI.
Photo of connections under the processor socket for easy signal tracking.
For improved diagnostics of the C517A processor subsystem, a file for loading into the emulator and a screenshot of its operation are attached.
My AI is detecting possible BS.
Apply your AI to my other threads please.
Correction. To start this board, you need to apply 7.5 volts simultaneously to two points: the 78L05 stabilizer input and the 15-volt zener connection point of D46 and R69 (photo). This will remove the INT0 signal from C517A.
A defect was detected in the LAS module (photo) related to a poorly designed Aref voltage supply. The voltage is supplied by a powerful L272 op amp and damages the corresponding processor input when the processor supply voltage is absent. Hidden under the "LAS-FM Uewa" sticker is a PIC16C76 (firmware attached), and in the upper right corner is a PALCE16V8H (firmware attached).
Made in China?
It's from STILL WAGNER FM 20 (2001). They also sent me an LAS board from another forklift to exchange the software, since this FM 20 is really needed for work, and the other one can wait.
Module LAS (FM20) eeprom and firmware.
A working LAS module from another forklift (photo) was used for the repair. The firmware posted above was transferred to the working module, and the firmware from the working module was saved and posted in the archive below. The machine is operational, and the process is complete.