TEAC LEDV32U83HDR(takes awhile to come out of standby)

[Amraks]

You plug it in when cold you get the red light, you try to turn it on with remote or button it fails to turn on. So 5 mins later you come back and turn it on it starts like nothing ever happened.





Now I have pictures of the PSU board but they aren't from this tv this is a photo I have found on ebay of the same board. The one in the photo is a refurbished.

there is 2 capacitors they look like they have replaced in this photo that are a different color to the capacitors on the tv I am repairing they are aishi's..
I see a lack of grey glue on them.

I am wondering if these capacitors are the culprits. before I go pouring a customers money into replacing capacitors.


I have also included a schematic to ZD-95-MP123T-12N PSU for reference.

I believe the caps are located on the schematic at EC25
and EC27.

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

Any idea's anyone?

[tom66]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

Have you checked the power board voltages? You can rule in or out a power board fault by doing that.

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

When I turn it on you can hear a high pitch buzz then it comes right..

trying to listen to fix this tv but my family is on school holidays...

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

removed

[mmartell]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

Trouble cold starting ? Take a hair dryer to it.

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

will do that I will let it cool for awhile, I have it starting up. I forgot to plug in some plugs.
I disconnected plugs to get the back off as the cd player is attached to the shell how annoying is that.

Owner has told me it takes awhile for it to come out of standby when cold.

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

voltages are normal I just tested them.

I am thinking a capacitor problem now.

as when you turn power off you can still hear a whine..

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

Also like to add step by step problem.

1. AC power on at the switch you can hear the whine.
2. turn on tv with button or remote on the side.
3. Red light goes green.
4. takes 10 seconds for screen to come on with the high pitch whine stopping once it comes on.

this is weird.

[vinceroger69]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

heat the psu board up with a hair dryer for 3 to four minutes does the set switch on any quicker? if so i would check the capacitors with a esr meter.
i have a few months old hitachi led set it takes 10 seconds dead on to get picture so this 10 second delay may be normal.

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

yeah but does it have a high pitch whine in standby? I don't think its normal at all.

[vinceroger69]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

none at all on this hitachi can you narrow down the noise at all? maybe a transformer buzz etc.
maybe use a long cardboard kitchen roll insert and put one end on your ear and move the other end around the psu you might hear it narrow it down? not sure if it will work i would try it myself.

[truep]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

IMOH, 10 seconds is normal for most TV's I own (for turn on). I cant explain the noise though.

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

none at all can you narrow down the noise i use a cardboard kitchen roll tube place one end on psu board one on your ear you can easily find the noise its just curing it!!

Yeah gotta wait for the glad wrap or foil to run out first lol. I did have one of them tubes but the gf threw it out.

I will check the caps with a ESR meter, I am still waiting on a soldering Iron handle for station and I am not using my cheap iron on this tv.

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

The whine is coming from the transformer.
Have tested them 2 caps I suspected but my tester said they where they are meant to be.

25v 1000uf

1. 1001uf
2 994uf

I have tested the voltages they are all good.

its just in standby mode its making this noise.

I am at a stand still where the problem lays with this tv.

I have also tried to recreate the tv not turning on as its turning on normal.

Its just a high pitch buzz I am trying rectify

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

I can describe that buzz noise now when I turn off the tv it sounds like a old flash on a camera charging up.

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

just realised I need a ESR meter not a capacitance tester.

Would it be worth just recapping the whole board?

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

just done a recap on the entire board.

No success its still making this high pitch camera flash noise.

could it be the big caps causing this.

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

I have gone over my voltages again.

12v = 6.2 mv
12v = 6.2 mv
gnd = 0
gnd = 0
gnd = 0
5v = 9.9 mv
5v = 9.9 mv
5v sb= 5.259v
s/o = 0
5v = 9.9 mv
5v = 9.9 mv
gnd = 0
gnd = 0

not sure if them circuits with the millivolt's on them are meant to be presenting anything.

[Amraks]

Re: TEAC LEDV32U83HDR(takes awhile to come out of standby)

Just tested conn 3A

24v = 3.8 mv
24v = 3.8 mv
5v sb = 3.6 mv
5v sb = 3.6 mv
gnd = 0
gnd = 0
gnd = 0
gnd = 0

isn't the 5v rail meant to be producing 5v in standby?