My mother has a washing machine model no: LG WFS65A01DCT. One day; I found it's main pcb schematic from a website called servicemanuals.us.

The schematic is somewhat blury; but I will post it below! But, What I want to know is that how can I read the PROM/EPROM contents and store it for future reference? Like the pcb seems too pricy and hard to find! The original main board had IC TMP87CH46N.

But, 7 years ago, the main pcb was damaged by cockroaches and we had to replace it with a new one. It had a different IC TMP87PH46NG (is it different?). I do only have a Lancos's PonyProg Serial DB9 to EEPROM programmer(using an old win 7 PC)! Which I uses to program ATMega32, 24Cxx and much more(using AVRDUDE and PonyProg).

Schematic of the washer Main Board
So is it possible to read this IC without taking it apart from the PCB?
(I could only understand VDD, VSS, SO, SI, SCK, PWM, RESET and analog/digital pins!)

 

So is it possible to read this IC without taking it apart from the PCB?

No. You have to remove it from the board. It reads like a 256kb EPROM, but you need an adapter.

 

No. You have to remove it from the board. It reads like a 256kb EPROM, but you need an adapter.
View attachment 286030

If its a micorcontroler as per this post
its liable that the code is "locked" so can not be read back,

 

its liable that the code is "locked" so can not be read back,

Not according to the datasheet excerpt.

 

Here's a copy of the datasheet:
https://www.datasheetarchive.com/pd...f2a58b3ce079a52d3a82ba&type=M&term=TMP87PH46N

 

Hi people; So is it impossible to,
1. Read this IC/MCU without taking it out?
2. Read this IC/MCU with a normal USB to Serial or a Serial port on the back of the PC?

Does it says that it can be locked by burning off some fuses and prevent even from reading it?

And a small question; what does the IC211 (93C46) does? (It seems there for saving the last state while in a power outage; ours doesn't have that!)

 

So is it impossible to,
1. Read this IC/MCU without taking it out?
2. Read this IC/MCU with a normal USB to Serial or a Serial port on the back of the PC?

No. This is only possible when in-circuit programming capabilities have been designed in.

Does it says that it can be locked by burning off some fuses and prevent even from reading it?

I didn't see that in the first page of the datasheet. From what I read, it said it programs and verifies the same as a 27256 EPROM. I'm only aware of one EPROM that could be read locked and it never became a product. I worked with the guy who designed it.