Acer X223W is black without led

[fred69]

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

[fred69]

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 | P5.7 DSPA
4 | 0V | RST
5 | 3.2V | ASCL/P3.0/RDX
6 | 0V | NC
7 | 0V | NC
8 | 3.2V | ASDA/P3.1/TXD
9 | 3.2V --> 0V | button "ON/OFF" INT0 P3.2 (0V to the pressing button)
10 | 3.2V | INT1 P3.3
11 | 3.2V | P3.4/T0
12 | 3.2V | P3.5/T1
13 | 3.2V | P7.6/CLK02
14 | 3.2V --> 0V | button "MENU" P7.7 (0V to the pressing button)
15 | 1.68V| XO crystal OUT
16 | 1.68V| XI crystal IN
17 | 0V | VSS (ground)
18 | 3V | NC
19 | 0V | NC
20 | 3.2V|P6.0/ADC0
21 | 3.2V --> 1.8V | button "+" P6.1 ADC1 (1.8V to the pressing button)
22 | 3.2V --> 0V | button "AUTO" P6.2 ADC2 (0V to the pressing button)
23 | 3V | P6.3/ADC3
24 | 3.2V | P6.4
25 | 3.24V | P6.5
26 | 1.7V | P6.6/CLK01
27 | 1.8V | P6.7
28 | 0V | VSYNC
29 | 0V | NC
30 | 0V | NC
31 | 0V | NC
32 | 0V | NC
33 | 3.2V | P1.7
34 | 3.2V | P1.6
35 | 3.2V | P1.5
36 | 3.2V | P1.4
37 | 3.2V | P1.3
38 | 3.2V | P1.2
39 | 3V | P1.1
40 | 3.2V | P1.0/T2
41 | 3.2V | VCC
42 | 0V | NC
43 | 0V | NC
44 | 3.2V | P5.0/PWM0
45 | 3.2V | P5.1/PWM1
46 | 0V | P5.2/PWM2
47 | 1.8V | P5.3/PWM3
48 | 3.2V | P5.4/PWM4

My signal ON/OFF should be out by what component RTD2120L pin?
Tension seems suspicious to you?

Thanks