LCD TV Repair Training Manual/Book Source
in [Repair]
|
From: jaugustine on 5 Sep 2009 07:32 Hi, A few months ago I looked for a LCD TV repair training manual/book at Amazon, Border's, Walden's, etc. Do you know of a source for such a manual/book? Thank You in advance, John PS, Remove "ine" from my email address
From: William Sommerwerck on 5 Sep 2009 07:57 Given the overall decline in the service industry, and the way modules are returned for factory repair -- or products are simply thrown away -- it's unlikely there are any such books.
From: PlainBill47 on 5 Sep 2009 14:49 On Sat, 05 Sep 2009 07:32:31 -0400, jaugustine(a)verizon.net wrote: >Hi, > > A few months ago I looked for a LCD TV repair training manual/book >at Amazon, Border's, Walden's, etc. > > Do you know of a source for such a manual/book? > > Thank You in advance, John > >PS, Remove "ine" from my email address Google 'LCD TV repair manual' You will get numerous hits, including commercial sites, e-books, and hard copy books. A common failure point on these sets is the power supply. PlainBill
From: Arfa Daily on 7 Sep 2009 04:26 <jaugustine(a)verizon.net> wrote in message news:mjt2a5tstvabgvlpfdlcpphvdmgco5ar26(a)4ax.com... > Hi, > > A few months ago I looked for a LCD TV repair training manual/book > at Amazon, Border's, Walden's, etc. > > Do you know of a source for such a manual/book? > > Thank You in advance, John > > PS, Remove "ine" from my email address > To be honest, there's not an awful lot to repair on them. By far and away, the two commonest problems are the power supplies, and backlight inverters. The power supplies are just generally just multi-stage switchers (standby supply, PFC supply and main supply - that's effectively three mostly independant switchers on one board). Most failures are fairly obvious. Chips with the tops blown off, bulging or open circuit caps, bad lead-free joints etc. Most boards have 'repair kits' available for them, where you just replace everything that comes in the kit, and turn back on. 99% of cases, that is then an end to the problem. Most TV switchers are pretty well behaved, once they have been properly repaired. Also, there are not all that many different types. An awful lot of LCD TVs are just badged from a few different manufacturers, and you will quickly see similar if not identical modules popping up in sets that are completely different on the outside. Worst case, if you really can't fix a particular power supply, the whole module is often available at an unrealistically cheap price from either the manufacturer, or their spares agent. If the name on the front is something obscure, you may well recognise the supply as being the same as one fitted to a major brand set. You can then just buy one of those instead. The biggest problem is schematics. Even if you can get a schematic set for the whole TV, you will often find that the PSU is shown just as a 'block'. Spares can also be a problem, with 'obscure' surface mount devices often being used. This ceases to be a problem if you use a repair kit, but in some cases, these are 'shotgun', and may contain devices to fix several different common problems, and thus cost a fair bit more than you would pay trade for just the devices that are *actually* faulty. That said, unless you are very experienced with switchers, I would always recommend replacing ALL of the items that come in the kit, as sometimes, some little diode or whatever, that appears to have nothing at all to do with the components that you *have* found faulty, is actually the original cause of the cascade failure that you thought that you had gotten to the bottom of ... :-( Backlight inverter boards suffer from bad joints, bad transistors, bad transformers, and bad caps for the most part. Again parts can be a problem, and it is often better to source a replacement board, then keep the old one to cull parts from for the future. Other than that, there's not too much else that you're going to be able to repair. For sure, you can get audio IC problems, and cap failures and so on in other areas of the sets, but in general, main board failures are going to be beyond the diagnostic abilities of a 'normally' equipped and trained engineer. Hope that is of some practical help to you. Arfa
From: William Sommerwerck on 7 Sep 2009 06:08
> Worst case, if you really can't fix a particular power supply, the > whole module is often available at an unrealistically cheap price... Did the world suddenly change overnight? |