Electronics > Repair
What more i can do?
<< < (23/112) > >>
Harry_22:
Please attach pictures from oscilloscope
222Lab_Test222:

--- Quote from: Harry_22 on November 11, 2024, 05:29:41 am ---Please attach pictures from oscilloscope

--- End quote ---

this?
Harry_22:

--- Quote from: 222Lab_Test222 on November 11, 2024, 05:22:40 am ---
--- Quote from: Harry_22 on November 11, 2024, 05:15:23 am ---
Please be more careful.

--- End quote ---

BUT IC23 uPD4990A , the DATA OUT pin (Pin 10) is unstable in non working board, where in working board it is constant 4.8V. I checked all the CLK, INPUTS and all are same to the working board, why is DATA OUT is not acting as it should be.

Another is IC53 74HC/HCT374, the Q0 pin (Pin 2) is low in non working board, where it is high in working board. The other are same in both working and noin working one.

Why both ICs output is weird, even when clk input and as well as enable pins are acting fine?

--- End quote ---

From IC23 and IC53.
Sorry I can't imagine them from the text.
222Lab_Test222:

--- Quote from: Harry_22 on November 11, 2024, 05:38:14 am ---
From IC23 and IC53.
Sorry I can't imagine them from the text.

--- End quote ---

Working Board
222Lab_Test222:

--- Quote from: Harry_22 on November 11, 2024, 05:38:14 am ---
From IC23 and IC53.
Sorry I can't imagine them from the text.

--- End quote ---

Non working

Note : I am more concern to ic23 as it is op pin and connected to Wacom Ic.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod