Instruments/tools needed for TV repair

[retiredcaps]

Re: Instruments/tools needed for TV repair

I have purchased the Kendall 899D and it's almost great, but when I need to remove a cap with a bigger solder, or the trace is pretty big, it handles it pretty bad.

Get a 3.2mm chisel tip for it and try desoldering again.

[retiredcaps]

Re: Instruments/tools needed for TV repair

Why is that? That's what I wanted to buy, but in the last moment I found the 85-v.
On the 170 class the holster is not removable.

There is absolutely nothing wrong with the Fluke 170 series.

Given what you were going to spend, $150 for used Fluke 179, and what you did spend, $250 for new Fluke 87V, I think the latter is a better deal because it has more features and you get the warranty.

[tibimakai]

Re: Instruments/tools needed for TV repair

Since we are talking tools/instruments here, what kind of soldering stations do you guys have.
I have purchased the Kendall 899D and it's almost great, but when I need to remove a cap with a bigger solder, or the trace is pretty big, it handles it pretty bad.
That station that I have purchased is mostly for the heat gun anyway.
I'm looking at the Weller WESD51, what do you think about this, or could you recommend something around that ballpark? I'm kind of eyeballing the Hakko 951, but it's a bit expensive. I like it digital.

[tibimakai]

Re: Instruments/tools needed for TV repair

Why is that? That's what I wanted to buy, but in the last moment I found the 85-v.
On the 170 class the holster is not removable.

[retiredcaps]

Re: Instruments/tools needed for TV repair

PS. The Fluke 179 isn't on my shopping list unless it is really really cheap (like $50).

[retiredcaps]

Re: Instruments/tools needed for TV repair

That fluke is looking like it will go cheap. Get Budm to buy it for you.

It always looks cheap until the very last second when snipers come in.

Now these were good deals that expired today. A little fast orange or gojo and the holsters will look like new.

http://www.ebay.com/itm/360452266881

http://www.ebay.com/itm/360452260738

[Jasgriff]

Re: Instruments/tools needed for TV repair

That fluke is looking like it will go cheap. Get Budm to buy it for you.

[tibimakai]

Re: Instruments/tools needed for TV repair

I haven't checked that. Sorry.
Your right, I forgot about the warranty. Maybe for this price you could trust the meter and you could lose the warranty.

[retiredcaps]

Re: Instruments/tools needed for TV repair

http://www.ebay.com/itm/ws/eBayISAPI...:B:WNA:US:1123

If this auction is directed at me, it states (like most professional sellers)

ABSOLUTELY NO INTERNATIONAL BIDS will be accepted (including Canada)

[retiredcaps]

Re: Instruments/tools needed for TV repair

Why not buy it from Amazon US then?

1) Amazon.com says for the Fluke 87V

Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses.

2) There is also the question of warranty. Typically, most Canadian HQ will NOT provide warranty unless it is purchased in Canada from an authorized dealer. As a Canadian, buying a new Fluke 87V from an authorized USA Fluke dealer is considered "gray market"/invalid when it comes to warrany claims.

3) The above is also common "practice" for TVs, cars, PCs, etc.

4) Right now, I have more multimeters than what I need, but I'm willing to get an Fluke 87V or 87IV or 89IV at the right price.

[tibimakai]

Re: Instruments/tools needed for TV repair

http://www.ebay.com/itm/ws/eBayISAPI...:B:WNA:US:1123

[tibimakai]

Re: Instruments/tools needed for TV repair

Why not buy it from Amazon US then?

[retiredcaps]

Re: Instruments/tools needed for TV repair

I have purchased a Fluke 87-5 from Amazon(VIPMART) for $250(!!).

Excellent deal if it comes with full warranty. In Canada, I would have to pay $500 get a new 87V.

[budm]

Re: Instruments/tools needed for TV repair

That does not make sense since the primary circuits is still driving otherwise you will not have the 12v output on the 12v winding, so it means that the 24v winding must still be putting out the AC but the rectifiers are not. You can use your new scope to look at the 24v output winding.
But you ar saying that the 12v under load the out put gets higher also and it stays like that? Check the ground traces of the 12v and the 24v section, when you mount the board into the chassis, see if the 12v ground is still connected to the 24v ground. Also measure the DC of the 12v ground pin and the chassis, and also 24v ground pin and the chassis.

[tom66]

Re: Instruments/tools needed for TV repair

Another thing you should have is the Isolation transformer, do not use your new scope on the Hot side of the circuits withouit having what ever your arfe working on powered by the Isolation transformer! otherwise you will blow up your scope and the bridge rectifiers, and etc. in the hot side of the circuits since your scope probe ground is more likely to be connected to the scope power cord ground prong.

If you can get one, I would highly recommend a variac too. They can be very useful to slowly power up a circuit after you have replaced some expensive MOSFETs or bridges. The components will get hot before they fail and smoke if there is a fault somewhere. You can get isolated variacs which combine the two features. If you have a powerful variac like mine (4000VA) you -will- need an inrush limiter, or you will trip the breaker all the time when you switch it on.

[tibimakai]

Re: Instruments/tools needed for TV repair

Both are higher, 13.3V and 26.6V, basically it's exactly doubled the 13.3V.
The 13.3V under load goes higher and the 24V under load drops to I guess to 0V(never waited because it goes down slowly.

[budm]

Re: Instruments/tools needed for TV repair

"The big transformer gets one voltage from the primary and transforms it into two on the secondary"
Yes, that is correct, there are two secondary windings, one fo the 12v and one for the 24V. I still cannot see how you can have much higher12V output, but not the 24v output since they are generated by the same transformer which it will affect both outputs. There must be open Ground return connections some where.

[tibimakai]

Re: Instruments/tools needed for TV repair

yes. it's something with the PS, but I can't figure it out what went out.
I try to understand this PS. The big transformer gets one voltage from the primary and transforms it into two on the secondary?
Soon I will get the ESR meter and I will check all the capacitors to make sure that they are all OK.
It seems that the 24V does not have enough juice and the 12V has to much.

[budm]

Re: Instruments/tools needed for TV repair

Without having the inverter boards attached?

[tibimakai]

Re: Instruments/tools needed for TV repair

Thank you, for letting me know. I will look into it.
By the way, thet Vizio PS acts the same way when it's in the TV.
24V, 3.3V comes on(don't remember the 12V what it does) for a second and drops down.