Car dvd video dead

[ivtec]

Hi guys,my son got this car DVD VIDEO in a car where he works at as a mechanic it´s dead i checked voltages on the main board and nothing,
i send some pic there are two big black components it looks like Caps one is
.470 and .330, i checked the with a cap analyzer but nothing shows maybe it's to low farads or the dead,i also checked with my Fluke on the cap checker also nothing,are this really caps? and if so could these be bad?
The fuse is OK, also the wiring is kinda confusing ,i connected the yellow
dc12v and the black ground, there is red i assume that is for ac and also a grean and a white wires these last 2 were not being used. can you guys give a hand on this one please,thanks in advance

[ivtec]

Re: Car dvd video dead

Hi guys,my son got this car DVD VIDEO in a car where he works at as a mechanic it´s dead i checked voltages on the main board and nothing,
i send some pic there are two big black components it looks like Caps one is
.470 and .330, i checked the with a cap analyzer but nothing shows maybe it's to low farads or the dead,i also checked with my Fluke on the cap checker also nothing,are this really caps? and if so could these be bad?
The fuse is OK, also the wiring is kinda confusing ,i connected the yellow
dc12v and the black ground, there is red i assume that is for ac and also a grean and a white wires these last 2 were not being used. can you guys give a hand on this one please,thanks in advance

here

[retiredcaps]

Re: Car dvd video dead

i send some pic there are two big black components it looks like Caps one is
.470 and .330,

1) The pcb designation tells you what the components are. It looks like 470 is L2. L is an inductor. An inductor should read about 0.2 ohms.

http://en.wikipedia.org/wiki/Electro...e_designations

2) A 0.85 retiredcaps' bonus point for showing MOST of your Fluke 87V multimeter.

3) What is the part number of U2? Provide a link to its datasheet.

[ivtec]

Re: Car dvd video dead

1) The pcb designation tells you what the components are. It looks like 470 is L2. L is an inductor. An inductor should read about 0.2 ohms.

http://en.wikipedia.org/wiki/Electro...e_designations

2) A 0.85 retiredcaps' bonus point for showing MOST of your Fluke 87V multimeter.

3) What is the part number of U2? Provide a link to its datasheet.

Thanks Bro: You´re right i should known better i guess i'm sometimes the dumbest guy on earth i some times don't think,and after i posted was when i started to think i sure found out by lookink at the board print and there is L2 ,L3 and both are ok.
about U2 is 1507-50,a 150khz 3a PWM dc/dc convrter,

also i noticed on the board that i send a pic there are 2 small surfmount components missing.thanks .

[selldoor]

Re: Car dvd video dead

Not all board positions need to be filled. Pictures are not quite clear enough for
trouble shooting can you re do 1 and 2 looking straight down. May get better result outside without flash?

Link re 1507-50
http://www.alldatasheet.com/datashee...1507-50D5.html

[ivtec]

Re: Car dvd video dead

Thanks Bro: You´re right i should known better i guess i'm sometimes the dumbest guy on earth i some times don't think,and after i posted was when i started to think i sure found out by lookink at the board print and there is L2 ,L3 and both are ok.
about U2 is 1507-50,a 150khz 3a PWM dc/dc convrter,

also i noticed on the board that i send a pic there are 2 small surfmount components missing.thanks .

The missing 2 surf mount components are in the first raw next to the 18pin chip,you can see the green board where the components were,you can see 3 resistors and then the missing ones,also the 18chip has no part# on it so don´t know what chip is this.this is part of the front controls where power volume Chan and so on.

[retiredcaps]

Re: Car dvd video dead

about U2 is 1507-50,a 150khz 3a PWM dc/dc convrter,

If your fuse is good, then check each pin on U2. Refer to the datasheet. Report the DC voltage for pins 1-5. pin 3 is your ground GND.

[ivtec]

Re: Car dvd video dead

If your fuse is good, then check each pin on U2. Refer to the datasheet. Report the DC voltage for pins 1-5. pin 3 is your ground GND.

Thanks retiredcaps: i checked volts first on D1 next to power cables inputs and it has 12vdc then i checked U2, pin 1=half a volt,pins2,3,4,5,zero volts,

[retiredcaps]

Re: Car dvd video dead

Thanks retiredcaps: i checked volts first on D1 next to power cables inputs and it has 12vdc then i checked U2, pin 1=half a volt,pins2,3,4,5,zero volts,

1) U2 pin 1 is Vin. If it is 0.5V, then whatever component that is feeding it is bad or U2 is bad.

2) With power off, see if pin 1 is shorted to pin 3. Report your ohm reading.

3) With power off, use your Fluke 87V and see what components have continuity with pin 1 of U2.

4) Then with power on, see if those components are 12V DC or 0.5V DC.

5) Hint: A bigger clear focused picture of that area would help us help you.

[ivtec]

Re: Car dvd video dead

1) U2 pin 1 is Vin. If it is 0.5V, then whatever component that is feeding it is bad or U2 is bad.

2) With power off, see if pin 1 is shorted to pin 3. Report your ohm reading.

3) With power off, use your Fluke 87V and see what components have continuity with pin 1 of U2.

4) Then with power on, see if those components are 12V DC or 0.5V DC.

5) Hint: A bigger clear focused picture of that area would help us help you.

thanks again retiredcps:U2 Pin 1 to 3 it's not short it goes from 100k to 375k

pin 1 has continuity with all pins

and as i measured before ground to pin 1 is half a volt and to all others is 0v

the pic of the two sides of the the board is the best i can do. thanks

[retiredcaps]

Re: Car dvd video dead

pin 1 has continuity with all pins

I think you misunderstand. What components have continuity with pin 1? For example, in the marked up diagram, do the red dots have continuity with pin 1? If it has continuity, I want to know what is the DC voltage on that component.

the pic of the two sides of the the board is the best i can do. thanks

What is part number U10 and this time provide a datasheet link for it instead of having selldoor do the work?

[ivtec]

Re: Car dvd video dead

I think you misunderstand. What components have continuity with pin 1? For example, in the marked up diagram, do the red dots have continuity with pin 1? If it has continuity, I want to know what is the DC voltage on that component.



What is part number U10 and this time provide a datasheet link for it instead of having selldoor do the work?

Thanks again retiredcps;i checked the red dot points you marked against pin 1 of U2 and all have continuity,

The part# for U10 is 74HC40S2D it seemsto like a micro control a 16 pin the closest i could find is

http://www.alldatasheet.com/view.jsp...word=74HC40S2D

[retiredcaps]

Re: Car dvd video dead

Thanks again retiredcps;i checked the red dot points you marked against pin 1 of U2 and all have continuity,

Set your Fluke 87V to diode test mode. Test each of the 3 diodes to see if they are good or not. You should have 6 readings in total. Report them.

The part# for U10 is 74HC40S2D

Hmm, 2400 possibilities. How about we change it to 74HC4052D?

http://pdf1.alldatasheet.com/datashe...4HC4052DW.html

Refer to pinout diagram on page 499. Black probe on pin 8 (GND) and red probe on pin 16 (VCC). What is the DC voltage?

Sidenote: Regarding "S" and "5", see

https://www.badcaps.net/forum/showthread.php?p=213475

[ivtec]

Re: Car dvd video dead

Set your Fluke 87V to diode test mode. Test each of the 3 diodes to see if they are good or not. You should have 6 readings in total. Report them.



Hmm, 2400 possibilities. How about we change it to 74HC4052D?

http://pdf1.alldatasheet.com/datashe...4HC4052DW.html

Refer to pinout diagram on page 499. Black probe on pin 8 (GND) and red probe on pin 16 (VCC). What is the DC voltage?

Sidenote: Regarding "S" and "5", see

https://www.badcaps.net/forum/showthread.php?p=213475

Thanks retiredcaps i checked the volts as you instructed pin 8 to pin 16 and got zero 0.0001volts,

regarding S'' it's realy a S not a 5,

about the diodes on diode test D1-0.500 D2 and D3 0.600

[retiredcaps]

Re: Car dvd video dead

about the diodes on diode test D1-0.500 D2 and D3 0.600

Is it 0L the other way for each diode? You should have 6 readings.

[ivtec]

Re: Car dvd video dead

Is it 0L the other way for each diode? You should have 6 readings.

actually On D1 0.506 and reverse v OL

D2 and D3 0.670 and reverse v 0.195,0197

[retiredcaps]

Re: Car dvd video dead

actually On D1 0.506 and reverse v OL

D1 is good.

D2 and D3 0.670 and reverse v 0.195,0197

Desolder both D2 and D3 and repeat test out of circuit. Report all 4 readings.

[ivtec]

Re: Car dvd video dead

D1 is good.



Desolder both D2 and D3 and repeat test out of circuit. Report all 4 readings.

Thanks badcaps,

D2,D3 out of circuit both are 0.198 and reverse v OL

thanks for trying to help and to be so patient i think i´m going to give up on this one i don´t really want to spend much money on this thing, i still think those missing components either caps or resistors of the control board with the ic that has no p#on it might be the problem just a thought.

Besides i got my Sony TV KV36HS500 with a fault to worry about,
it's been about more than a year had sometimes push power more than one time for it to start up with 6 blinks but it always manages to start up but with the exception of not showing no fault on the diagnosis self test screen,
but now it shows the fault with 6 blinks have to push 2 times the power for it to start,i have the 2 suggested that go bad IC's MCZ3001 ,6501,8002, in store.
Also some people say there are four caps c6510,c6532,c8027,c8030,Mylar caps and I504,

but I'm waiting for the tv to go completely dead so i open it i don't fell like to open this huge tv when it still runs it has been like this for the past almost 2 years. what do you suggest?


6 LOW B 1
7 H STOP 1 this is what shows on the screen when i bring up the self diagnosis by Display,5, Chan-,power.