Sharp le32d44e

[call me al]

Hi all Have this Sharp set model LE32D44E Have worked on this model before but am stuck with this one.The fault was not coming on found q7503 on psu short so replaced it ,set now comes on for about 15 mins and cuts off,when its turned on the backlight tubes light half way across for a sec and goes off. I know its a longshot but mabey somone has had this fault before Thanks

[jordan]

Model LC not LE
Check lamp or reset lamp error counter

[downunder]

Hi Al,

As Jordan says, go into the service mode and check the Lamp Error Counter. If it reads "5", the set will no longer turn on. Reset the counter to "0". If this is the case, you'll still have to determine the cause of the lamp failures or it'll come back to bite you. Doesn't sound like this problem because the set simply does not respond when it happens, but it may be on the way to lock out.

Bruce

[Turnip]

Hi folks,

Remember that 'Contrast John' (see file) had a similar problem caused by duff CCFLs. Had one myself, tube replacement a bit difficult with wire ended replacements as Sharp tubes have metal end caps that clip in on this model - Chris.

[michael first]

hi to all,as I remember there's a training manual released by Sharp,which tells to put to gnd pin#1

of OZ964(inverter controller) so to disable the protection and see the state of the ccfl lamps;I guess

it's worth a try.

[downunder]

Definitely worth a try. Sounds like a backlighting problem. Have you managed to get into the service menu yet, to check lamp error count and possible cause of failure.

Bruce

[Turnip]

Hi folks,

Looked up entry by 'Contrast John' - Think attach, might be useful - Chris.

Managed to sort this one out. The lamp error counter had reached 5 which means the set needed to be started in service mode (hold down input and vol - on tv set whilst applying mains until the letter K appears on the screen, after which press vol - and prog - on tv set to get the service menu). Had no joy doing this though because the ccfl driver IC (BD9883 smd) was going into protection mode and preventing the backlight from operating. To get round this problem I overode the protection by fitting a shorting link across C7558 (smd capacitor) located near the IC.
(C7558 is located about an inch away from the BD9883 driver IC. Both are surface mounted components.)  The set would now start in service mode.
Found that there are some test patterns available in the service mode one of which is a grey screen. Selecting this option showed the problem. The area across the centre of the screen was darker than the rest indicating the centre pair of ccfl tubes weren`t working. This chassis uses 10 tubes driven by 5 inverter transformers mounted in line with them, so before embarking on a tedious stripdown I ruled out the possibility of a duff transformer by swapping the centre one with one of the others. No change of course, so I dismantled the unit and checked the tubes and their holders for any visible problems. None were apparent but replacing the tubes cured the problem. Just needed to clear the lamp error and remove the link
Two were faulty on that one but it seems more common that just one is u/s. Check to see if your dark band is narrower at one side than at the other. If it narrows to a couple of inches it's probably just one tube.
Have found it useful to mark the position of the faulty tube before dismantling fully, so as not to swap the wrong one.
Contrast John.

[michael first]

hi,that's right, the 32inch model mounts BD9883FV as inverter controller,so must ground pin#12 to

disable the protection,as Chris writes,citing 'Contrast John'.the OZ964 is mounted on the 26inch

version.sorry

[Turnip]

Hi Mike,

Have most Quuq LCD stuff listed since Bruce landed in Australia to sort Panasonic stuff for us folks.

Mind you, little on Plasma - Hate 'em, as my customers have short pockets, and mostly require change from a fiver - Hits the profit margin - Chris.

[downunder]

Hi Chris,

Nil desperandum, plasmas are on the way out, but hey, they're just another tv. Certainly beats those colossal rear projection tvs. Still occasionally get a punter who wants one of the monoliths repaired.

Didn't know folks were such tight-asses in your neck of the woods. You'll have to supply them with man-bags so they'll have room for more shekels. Hell, I wouldn't even remove a back cover for 10 bucks.

Bruce

[Turnip]

Hi Bruce,

Whats ten bucks in British Pounds ?

Had one of they projection tellies in where the top central magnet had fallen off, and set had trouble doing auto convergence - Impressed that it tried - Bit of glue and all sorted, though couldn't see the picture 'till down on ancient knees.

Three tube projection sets were a bit testing, as took me back to the early 70's with all that convergence biz, and burned out pots.

As to Plasma - Really glad that Sammy did a real cheapy where the panel popped the panels, only serious cash I've ever made, and just for fault reports at £20 a pop - Chris.

[downunder]

Hi Chris,

1 AUD (aussie dollar) is only worth about 46 Britz pence, so it's a bit p-weak.

To think those RPTVs used to be quite the rage. Recall a Thomson once....couldn't get it into the Hi Ace van without splitting the TV in half. Hours of disassembly and reassembly.

Thank god for the Sammy. Was that the one where the panel would spontaneously crack?

Bruce

[Turnip]

Hi Bruce,

Winning Plasma was UK Bush BPDP42HD2 but actually - Samsung S42AX YB09

'Bush' used to be a name of quality way back when quality mattered - Try 'Zen and the art of Plasma maintenance' where Bush gets no mention at all.

Trouble is - most local folks buy cheap crap from Aldi (suppliers of the famed Bush) and don't care to spend on repairs.

Real folks buy Sony,Toshiba and Panasonic as most all else here is Vestel under another name, or even worse Chinese, who don't care admit they made them, as they move on quickly to the next wonder - Chris.

Thinking on, we used to have German stuff - Grundig that had trouble turning line SCR's off, where Sony were giving us gate controlled whatsits that wouldn't turn off at all, so we fitted BU208s and modified the drive a bit.

Last Grundig I met was a Profilo Telra where P/S caps drooled all the time - Happily not seen a PT set for some years, Admittedly they did good CRT tellies where our Chinese chums were giving us sets where those 2 x 47Mfd caps in the P/S dried and gave us income.