sharp LC-32D44E series

[richey77]

Hi Folks

Trying to fix the above TV.  basically switch on, directly or via  remote, relay clicks in all power supply voltage rails kick up OK on the power supply inverter board then after about 3 seconds or so relay drops out and TV reverts to standby.

Anyone got some ideas??

cheers

richie

[sparky]

hi
try this



     Re: SHARP LC32DH66E
« Reply #3 on: February 17, 2011,12:13:03 » Quote 

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Hi, try this, press 'input' and 'volume -'  on the TV button panel and hold down, then power the set on. If it powers on you should see a 'K' on the screen, press vol- and prog + and you will enter the service mode. scroll through it and reset the backlight error to 0, then power down and restart. Hopefully it will come on as normal. It 

[richey77]

Hi  Thanks for the info

Tried  the above but no joy.  Holding down the button then switching on either by on button or with the mains on the wall by holding the buttons down  -- it behaves exactly as the original  fault posted.

I did remove the psu / inverter board and mount it so that the feed to the back lights were not connected but left  all other connection and made a  good ground. but still the same problem

Cant get it on for more that 3 seconds to probe around anything

thanks for help any other ideas much appreciated

cheers

richie

[dougc]

Hi Richie, Try this: fit a shorting link across c7558 (just behind centre inverter transformer) This disables the trip & the set should start. Bear in mind this is NOT a repair & must be disconnected after fault is fixed. Having said that I never did find the fault on mine & took the easy, but expensive, route & changed the panel. Hope this helps, Doug.

[richey77]

Hi Doug /Sparky

Tried the idea with the capacitor Bypass --It did not work but not all bad news!!  green light stayed on relay did not drop out and a quick check indicated key voltages were all OK.  tried the service mode trick again this time as relay did not drop out kept finger on until something happened--it did it dropped out  after 25 seconds. But  a second attempt and it kicked in on the service mode again after 25 seconds .  Eventually found my way to the lamp fault reset which showed a lot of lamp faults cleared them and then pulled the AC plug out.  Removed the shorting link on the capacitor.

Put mains back in and TV now came on OK  Picture looks OK not obvious  fault with back lights needed  country selection and a retune  but seems OK set it off with the remote control and it did come back on again.  So maybe fault is not cured but  will check for lamp fault counts if problem arises again.

bit of luck really I did not think an LCD TV would take longer than a 1950's valve radio to kick in!!

thanks for help both

cheers

richie

[richey77]

Hi Folks

I did think after my last post that I had not really fixed the problem.  The picture looks OK but TV is taking some time 2 start and the lamp fault count is moving up.  Sometimes the TV runs for around 1 minute then picture goes, about 10 seconds later  sound drops out and the TV goes off and the LED goes from green to red. Set it on again and it will run for several  hours with no problem.

Picture looks fine and the background on the TV with a fixed image is consistent in colour and brightness.

Any other experiences or points I could check?

cheers

bob

[bluesmoke]

HI you have a faulty lamp you can buy them from chs £15 each i think ,i recall you check them in the service menu and pick a screen test pattern and you should see some shadowing .there is a sharp service sheet somewhere on the forum

[brainstorm]

Hi Bob

Ive emailed you some info that will help

Brian

[richey77]

Hi All

Have got the TV going but only if I leave the short on  C7558 on the PSU panel in place.  All lamps do look OK on a test waveforms but one warms up a bit slower than the others. Couple of further questions B4  I finally cal it a day

Has anyone got the circuit diagram of the PSU Board reference number RUNTKA396WJN1?  It is not in the repair manual

what do you have to do to get at the lamps??

thanks in advance 4 any help  cheers

richey

[sparky]

hi
be careful and split the screen if new tubes needed chs sells them
dave

[Kilroys]

Enjoy.
Could it be the famous X3001 ?

[Turnip]

Hi Kilroys and thanks for that PDF -

Nice to get a Power/Inverter shematic included these days,

What is the famous X3001 - can't find a reference ?  - Chris.

[Kilroys]

Should be X3051 not X3001.
All the lamps should turn on  at the same time.
Had one where the lamps start to blink
and gave a lamp error every time. Had to change all ten lamps.
A few where there was a horizontal shadow. Change the dark lamp.
and finally a few where I change the crystal X3051 becourse
in the beginning I only reset the lamp error and the picture was ok but
got the tv back in a few weeks.
There is a bulletin about bad lamp connector if a pwb holder is missing.
Have never seen that pwb holder missing.

[richey77]

high folks and update

Managed to find the problem but customer ( a mate) did not want to buy two new tubes.   basically when its starts up two tubes are a bit slow but after 10 second  a slight dullness on the white test screen disappears. these two tubes seem to send an over voltage signal through and so up the trip count and shut set down. once on after around 20 seconds picture is very nice and set is fine

have left the shorting link on and he now runs it only when someone is in the room with it!! --his choice  will review situation if more serious problem arises

thanks  4 help folks

Richey

[coolboy0002]

PLEASE CAN SOMEONE EMAIL ME SERVICE MANUEL FOR SHARP LC-32D44E-BK  TV

THANK YOU!

COOLBOY0002@YAHOO.CO.UK