Sony bravia kdl26ml130 no remote signals pics this time

[budm]

Re: Sony bravia kdl26ml130 no remote signals pics this time

As far as the Ferrite bead inductor, as long as they show < 1 Ohms or so, they are good, the bad one will be open circuit.

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

Oh and also because I forgot I have no power led so maybe fault lies in that area just wanted to thank you guys for the help you gave me and hey budm would it be prudent to assume that most smd beads that are the same size generally are the same resistance? Or if I might be able to remove the bead from another MB for a replacement?

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

So you need to look for the P/N of that IR sensor to find out if the middle pin (output pin) is normally high or normally LOW).
You can put the DCV meter at the middle pin and GND, then hit the remote control button to see if the reading will show any fluctuation or nor, the correct way to test is to use the Oscilloscope.

OK will do and let you know my findings

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

here is a clip from norcal715 about the same problem.
https://www.youtube.com/watch?v=imF8_DHUPmU

Thanks I have viewed that before and have it downloaded somewhere guess I need to find which drive its on and re-view it

[CapLeaker]

Re: Sony bravia kdl26ml130 no remote signals pics this time

here is a clip from norcal715 about the same problem.
https://www.youtube.com/watch?v=imF8_DHUPmU

[budm]

Re: Sony bravia kdl26ml130 no remote signals pics this time

So you need to look for the P/N of that IR sensor to find out if the middle pin (output pin) is normally high or normally LOW).
You can put the DCV meter at the middle pin and GND, then hit the remote control button to see if the reading will show any fluctuation or nor, the correct way to test is to use the Oscilloscope.

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

OK, I did not see the edited reply with the Voltage reading.
I try enlarging the image to see where this cap C320 is. Is that the cap in the OPTICAL SENSOR section where it is connected to the Q320? That section has nothing to do with the remote function. The OPTICAL SEMSOR is for automatic adjustment of the backlights in relationship to the ambient room lights.
The remote function is int he IR section, IC401 is the IR sensor that receives the signal from the remote control. It should have 3.3vdc at the VCC pin of that IR receiver. The output signal that goes to the main board is on pin 8.

Ok so no need to really worry about that one cool but I did test and the voltages were right at these two points

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

if you have a oscilloscope, you can hook up the probe to the out put pin of the IR or on Pin 8 of the connector and check for pulses to see if it receives IR. On the conductor side of the HM3 board, IC 401 is mounted on the other side on the left (see your picture), the middle pin, there are 2 chip caps, see if they are shorted to GND or not.

tested those and they measured 3.3 note that all caps and beads are not being used on this particular set just the ones I inquire about others are for different models so as not to confuse anyone my fault for not mentioning it earlier

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

A quick test which may work for you for testing your remote and therefor rule it out as possibly faulty is to put your mobile phone into camera mode and point it at the IR end of your remote. Pressing a button should show the led glowing while button is depressed.

Thanks that's been done and the remote flash is present

[dick_barton]

Re: Sony bravia kdl26ml130 no remote signals pics this time

A quick test which may work for you for testing your remote and therefor rule it out as possibly faulty is to put your mobile phone into camera mode and point it at the IR end of your remote. Pressing a button should show the led glowing while button is depressed.

[CapLeaker]

Re: Sony bravia kdl26ml130 no remote signals pics this time

if you have a oscilloscope, you can hook up the probe to the out put pin of the IR or on Pin 8 of the connector and check for pulses to see if it receives IR. On the conductor side of the HM3 board, IC 401 is mounted on the other side on the left (see your picture), the middle pin, there are 2 chip caps, see if they are shorted to GND or not.

[budm]

Re: Sony bravia kdl26ml130 no remote signals pics this time

OK, I did not see the edited reply with the Voltage reading.
I try enlarging the image to see where this cap C320 is. Is that the cap in the OPTICAL SENSOR section where it is connected to the Q320? That section has nothing to do with the remote function. The OPTICAL SEMSOR is for automatic adjustment of the backlights in relationship to the ambient room lights.
The remote function is int he IR section, IC401 is the IR sensor that receives the signal from the remote control. It should have 3.3vdc at the VCC pin of that IR receiver. The output signal that goes to the main board is on pin 8.

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

Before replacing anything we need to find out what DCV you have on those 8 pins for the IR board that I request. No Voltage on the cap does not mean it is the bad cap.

Above budm are those the voltages we need

[budm]

Re: Sony bravia kdl26ml130 no remote signals pics this time

Before replacing anything we need to find out what DCV you have on those 8 pins for the IR board that I request. No Voltage on the cap does not mean it is the bad cap.

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

first make sure the remote is putting IR out! If that's good, then proceed to the IR board on the TV. Most of the time there is a ceramic SMD cap on the IR board that is shorted to GND, or a bad IR sensor itself.

cap has no reading powered up has to be bad says on surface the number 47 and that its 16v what can be used to replace it?

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

That is just he designator number, for example R1, R2, R3, or C1, C2, ETC.

OK thanks

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

OK thanks, please report the DCV reading of all 8 pins of the HM3 IR board.

Looking at the conductor side CN301 from upper to lower of connector
-3.3
-0.13
-0.13
-3.3
-0.00
-0.00
-3.3
-0.00
On the conductor side I get 0.00 at C320 and i'm thinking it should read the 3.3 ?

[budm]

Re: Sony bravia kdl26ml130 no remote signals pics this time

That is just he designator number, for example R1, R2, R3, or C1, C2, ETC.

[manstoblame]

Re: Sony bravia kdl26ml130 no remote signals pics this time

first make sure the remote is putting IR out! If that's good, then proceed to the IR board on the TV. Most of the time there is a ceramic SMD cap on the IR board that is shorted to GND, or a bad IR sensor itself.

Just a small thing but do the numbers indicated on smd components indicate value like say for instance C322 doesn't imply (capacitor 32 and 2 o's =3200) ?

[budm]

Re: Sony bravia kdl26ml130 no remote signals pics this time

OK thanks, please report the DCV reading of all 8 pins of the HM3 IR board.