Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

How sure are you it is bad?

List your regulators like this:

U8, LD1117-33
Pin 1 = 5.53V
Pin 2 or Tab = 3.33V
Pin 3 = 0.02V

^The above regulator is working correctly.

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

got to tell ya the regulators on laptop mobos etc all have different numbers from manufacture to another can't be standard numbering scheme. sheesh.

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

got to tell ya the regulators on laptop mobos etc all have different numbers from manufacture to another can't be standard numbering scheme. sheesh.

Yes there is a standard scheme.

KA1117-33 = Korean Semiconductor, 1117 type, 3.3V output
LM1117-25 = Linear Monolithic (National Semiconductor), 1117 type, 2.5V output
LD1117-ADJ = ST Micro (Not sure how acronym derived), 1117 type, adjustable output

see the pattern?

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

well this thing is not numbered like that at all, its labeled out like this...

brand logo says ac with a half circle around it

in the middle says 84-33 don't know if its a positive regulator but its 3.3 volt output i am sure.



and on bottom its says 0536al dunno if radio shack will have it or not. still a greenhorn here but i am your student here lol, teach me what those mean,

yes i see the pattern on your example but this one is throwing me off a little.

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

Radioshack won't sell them. I think half the store is dedicated to selling phones now.

84-33 is probably a 1084 type regulator 3.3V output. What do the pins measure? Test each relative to chassis.

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

got 5 volts in 3.3 volts on tab top of chip and bottom pin reads zero zilch suppose to be 1.2 volts less then the 3.3. the regulator after that reads less and no output on bottom pin as well.

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

No that only applies for adjustable regulators, ones with -ADJ in the part suffix. That regulator is A-OK. Check the others. If there is a U33 on the board it is essential you check it.

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

Radioshack won't sell them. I think half the store is dedicated to selling phones now.

84-33 is probably a 1084 type regulator 3.3V output. What do the pins measure? Test each relative to chassis.

yeah i agree, its nothing like it used to be.

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

In the UK we have a similar store called Maplin, they still at least sell some components, but they are mostly useless. Go in there once in a while to look for something and never find it. Don't know why I bother...

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

no u33 maybe i am blind but here is a pic of exact board, its not same board in that video you showed me. thankful your working with me on it.

[vinceroger69]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

next to c361 cap basicaly above blue connector bottom of board about 3 inches up and to the left

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

See image.

Red devices are regulators.

List your regulators like this:

U8, LD1117-33
Pin 1 = 5.53V
Pin 2 or Tab = 3.33V
Pin 3 = 0.02V

(Pin 2 and tab are the same pin - test one or the other. There is no tab on some of the other regulators, so just test pin 2. And on some regulators there is no pin 2, so test tab.)

Green devices are fuses.

TV unplugged - meter on fuse on 200 ohms - should read 0 to 2 ohms. (2 ohms = accounts for meter lead resistance.)
TV stuck in standby - test voltage on each end - should be nearly the same both ends (could be 0V - that just means no power yet because it's stuck in standby.)

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

next to c361 cap basicaly above blue connector bottom of board about 3 inches up and to the left

that would be u30 and u6

[vinceroger69]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

u33 10 legged device not sure what it is though
glad your making progress with this

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

with lower power board to main board plugged in...

u8
pin1 0.00v
pin2 0.00v
pin3 0.01v

u4
pin1 5.00v
pin2 3.30v
pin3 0.01v

u6
pin1 3.30v
pin2 1.81v
pin3 0.00v

u30
pin1 3.30v
pin2 1.50v
pin3 0.24v

u7
pin1 0.00v
pin2 0.00v
pin3 0.00v

u5
pin1 0.00v
pin2 0.32v
pin3 0.00v

u3
pin1 1.18v
pin2 0.00v
pin3 0.63v

u21
pin1 0.00v
pin2 0.00v
pin3 0.00v

u25
pin1 0.00v
pin2 0.00v
pin3 0.68v

fuse (f4) 5.00v both sides
fuse (f3) 0.62v both sides
fuse (f1) 0.00v both sides
all read 0.03 ohms

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

lower power board to main board unplugged



u8
pin1 4.70v
pin2 2.50v
pin3 0.00v

u4
pin1 0.14v
pin2 0.13v
pin3 0.00v

u6
pin1 0.13v
pin2 0.00v
pin3 0.00v

u30
pin1 0.13v
pin2 0.00v
pin3 0.00v

u7
pin1 4.30v
pin2 1.80v
pin3 0.00v

u5

pin1 5.08v
pin2 3.30v
pin3 0.00v

u3
pin1 5.03v
pin2 0.00v
pin3 11.8v

u21
pin1 5.02v
pin2 0.00v
pin3 8.05v

u25
pin1 8.03v
pin2 0.00v
pin3 11.8v

fuse (f1) 5.1 volts both sides
fuse (f3) 11.8v both sides
fuse (f4) 0.14 both sides

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

u33 10 legged device not sure what it is though
glad your making progress with this

ask tom what that is lol...yeah making progress slowly but surely thanks to tom and myself trying different things. do you have a tv like this one your working on?

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

Part numbers on the chips?

[heavymachines]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

u8

6h1l
17-25l

u4
84-33
0538AL

u6
6h1l
17-18l

u30
amc1117
f06461

u7
84-18
0553gl

u5
84-33
0536al

u3
az7805t
e1
648j99

u21
az7805t
e1
648j99

u25
kia
7808a p1
634

[tom66]

Re: Vizio VM60P HDTV10A No signs of life except speaker pop when unplugged

All regulators are OK, all fuses are good. I suggest you just swap the main board - possibly the all too common problem with firmware corruption or eeprom corruption.