Re: Acer X223W is black without led
Hello,
I tracked on the map scaler, the voltage from the ON/OFF button from the connector CN101 to RTD2120L component. The ON/OFF signal reaches pin 9 (INTO P3.2) of the component.
I expected to see out on another pin but no other reacts to pressing the button.
I made a list of the tensions on all pins of the component RTD2120L to see if my device was faulty.
Here is the statement
pin | V read | Observations
1 | 3.2V | P5.5 PWM5
2 | 0V | P5.6 DSCL
3 | 0V |...
fred69
Member
Last Activity: 04-29-2016, 02:41 AM
Joined: 01-10-2013
Location: orleans
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Re: Acer X223W is black without led
Hello,
The "service manual" available online until now detail the components TSUMU58BWHL or TSUMU58WHJ. However, my card uses a RTD2553VH.
I managed to find the datasheet for RTD2553V. I do not know the difference with RTD2553VH.
I do not know much in the study of digital chips.
People would be able to identify the inputs and outputs to test please?
Thanks...Leave a comment:
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Re: Acer X223W is black without led
Here is all the information I have...Leave a comment:
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Re: Acer X223W is black without led
Hi
Budm thanks for your research, I already found this document and it' s not for my card like said Selldoor.
I believe the exact reference is x223wb, but I do not think it changes anything.
I find nothing with reference x223wb.Leave a comment:
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Re: Acer X223W is black without led
I tested using the jumper battery: the lamps work !
So the problem comes from either I/F board or settings card (with button).
I'd rather find failure but if I do not I think isolate the original ON/OFF button and the led and apply 3,2V taken somewhere on the circuit.
What do youi think about this ?...Leave a comment:
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Re: Acer X223W is black without led
LF board 490901300200RLeave a comment:
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Re: Acer X223W is black without led
No, I have not yet done so. I think to do it this weekend at the latest
I checked my I/F board with the service manual file. Unfortunetly the card described in this document is not the same as mine. So I have some difficulties to understand how the voltage comes on CN801, from ON/OFF button.
Could you help me please ?Last edited by fred69; 01-17-2013, 05:29 AM.Leave a comment:
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Re: Acer X223W is black without led
When I said the caps were good, I tested this caps
The voltage on C102 is 5,13V
The voltage on C103 is 3,29V...Leave a comment:
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Re: Acer X223W is black without led
When I said the caps were good, I tested this caps
The voltage on C102 is 5,13V
The voltage on C103 is 3,29V...Last edited by fred69; 01-17-2013, 03:43 AM.Leave a comment:
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Re: Acer X223W is black without led
Hi,
Thank you for the service manual, is the same as mine indeed.
Now I can check the I/F boardLeave a comment:
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Re: Acer X223W is black without led
Hi,
I connected a 3 volts batterie between the pin5 on/off and pin3 (0V) of CN801. Only the ground is welded and I establish the contact with the other side of the battery on pin 5 of CN801. The results are the following
Note : CCFL are removed
On IC501 (OZ9938):
Pin1: 0V (OFF) then 2,38V during ~3s (ON) then 0V (DRV1)
Pin2: 5V (OFF) (VDDA)
Pin3: 0V (OFF) then ~2,87V during ~3s (ON) then 0V (TIMER)
Pin4: 1,128V (OFF) then 1,131V during ~3s (ON) then 1,128V (DIM)
Pin5:...Last edited by fred69; 01-16-2013, 08:31 AM.Leave a comment:
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Re: Acer X223W is black without led
The On/Off button is not stuck
Yes it's a good idea, I will try this
The rings on R816 : brown, black, brown and gold. (100 ohms) it's ok....Last edited by fred69; 01-15-2013, 08:49 AM.Leave a comment:
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Acer X223W is black without led
Hello,
My problem is the fallowing.
My acer screen X223w worked very well, I turned it off with the front button, two hours after I turned it on with the front button and nothing happens. Now I have no led to the front and the screen stays black.
I opened the screen to study the problem (cf picture)
All fuses are OK
All capacitors are OK
On CN801
While off
1) 5.05v (VCC 5V)
2) 5.05v (VCC 5V)
3) 0V (GND)
4) 0V (GND)
5) 0.03V (on/off)
While on
1) 5.05v (VCC 5V)
2) 5.05v (VCC...
No activity results to display
Leave a comment: