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What more i can do?

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222Lab_Test222:

--- Quote from: Swake on December 25, 2024, 08:35:28 am ---@222Lab_Test222

Would you please redo the measurement of OSC3 near the TORNADO chip that you already did in message 252 https://www.eevblog.com/forum/repair/what-more-i-can-do/msg5720533/#msg5720533

In that image the frequency measured by the scope is correct (2.45MHz) but the voltage is very high (over 16 Volt). As someone else pointed out, it might have been because your probe was set to 1x instead of 10x. Let's make sure things are normal here.

--- End quote ---
Yeah I confirm it.
The voltage was indeed 2V

222Lab_Test222:
By the way if you guys know or not,
the current consumption of No Working Board is less than current of Working Board.
Usually Working Board current is 2.8A tentative and No Working Board is 2.3A tentative.

asis:
Hi,


I have already noticed this (Reply #420 on: December 09, 2024 p.17) and this means that the POST process and the initialization process have been successfully completed and the device is in the working cycle, with the working image displayed on the screen, and all peripheral ports are polled, including KBD, Mouse, PRN, ISA.....and whatever else is there....
And also the SIMM DRAM (SIM2 RAS/CAS) is refreshed and the GPU (VGA) is working, forming a raster.
All this explains the consumption level of I ~2.8A and it can be higher, depending on the tasks.
-
Q1. Do you have the ability to raise the pins pin10(!); pin11 (IC23 uPD4990), or dismantle it, since you still intended to replace it with a new one,
and turn on the device.
-
Q2. Do you have DRAM memory strips (SIM2) in other cases.
Please take pictures from both sides (preferably after removing the stick).


Thank you.

222Lab_Test222:

--- Quote from: asis on December 26, 2024, 05:52:21 am ---Hi,


I have already noticed this (Reply #420 on: December 09, 2024 p.17) and this means that the POST process and the initialization process have been successfully completed and the device is in the working cycle, with the working image displayed on the screen, and all peripheral ports are polled, including KBD, Mouse, PRN, ISA.....and whatever else is there....
And also the SIMM DRAM (SIM2 RAS/CAS) is refreshed and the GPU (VGA) is working, forming a raster.
All this explains the consumption level of I ~2.8A and it can be higher, depending on the tasks.
-
Q1. Do you have the ability to raise the pins pin10(!); pin11 (IC23 uPD4990), or dismantle it, since you still intended to replace it with a new one,
and turn on the device.
-
Q2. Do you have DRAM memory strips (SIM2) in other cases.
Please take pictures from both sides (preferably after removing the stick).


Thank you.

--- End quote ---
1. I have done that in last time, do you want me to do again, I can do it no worries. BUT last time i did it did not run.
2. i do not understand, this. I mean recently i send the DRAM images already. Can you clarify more to it.

asis:
Ok.
Let's leave it (1)...
I'm just haunted by output pin 9 (MOSFET).
What does it block?
-
You had SIM 1 strips with DRAM chips in other x 8 cases.
-
I don't rule out that in addition to the current date and time (IC23), Flash RAM (SIM2) is polled, where the profile of the current parameters of the power unit itself can be stored, i.e. the polling algorithm during initialization includes two consecutive stages.
-
Sorry, I made a mistake:
DRAM - "SIM 1"
FRAM - "SIM 2"

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