Bushle-46gl12e

[vinceroger69]

Hi guys just been given one of these 46in full hd sets it uses a megmeet MP4618 psu and a T.SIS231.81 T460H1 P09 L02 VER C1 main the problem you can get it out of standby ok the led flashes blue about 20 times the lcd screen is lit a dullish blue which stays on about 12 seconds all the edge lit leds seem to be lighting looking through the back of the tv metal chassis holes/ no on screen menu volume control source etc seem to do nothing would you guys say faulty eeprom? any tests i can carry out? cheers guys.


sorry cant spell or edit the title maybe a mod can its a bush le-46gl12e

[ReeceyBurger123]

Re: Bushle-46gl12e

Images Vince ?

[vinceroger69]

Re: Bushle-46gl12e

Will do tomorrow a little dark here to take good pictures a visual inspection all looks ok i could pull all caps and test esr i guess but i see chs sells a eeprom maybe a common issue i will link pictures of the boards that are the same as mine so you can have a quick look but will upload mine tommorow. ive also noticed whilst the blue standby led is flashing you cant turn the set off on the side switch you have to unplug it.
http://www.chsinteractive.co.uk/elec...n-le46gl12.htm
http://www.ebay.co.uk/itm/T-SIS231-8...p2047675.l2557
http://www.ebay.co.uk/itm/2719135352...%3AMEBIDX%3AIT

[vinceroger69]

Re: Bushle-46gl12e

hi guys anyone have a schematic for the megmeet MP4618 psu as if possile i would like to jump the psu to check the voltages are stable this is a good clear picture of the psu as you can see it does not have the voltages printed on it
http://www.ebay.co.uk/itm/2719135352...%3AMEBIDX%3AIT

[CapLeaker]

Re: Bushle-46gl12e

Well... not thaaaat fast... You have STBY voltage. So first check if the main board returns PSon to the power supply. If that main board does not return PSon voltage to the power supply, the TV simply does not turn on.
You may have a bad main board, let it be an Eeprom problem or the main IC.

[finntricky]

Re: Bushle-46gl12e

i would say eeprom, it wont be the first time i have had the same problems with these sets, technika, jmb, bush, to name a few, but nine times out of ten you cant get the IC for them and have to get another main board,

[vinceroger69]

Re: Bushle-46gl12e

cheers guys i think i will risk ordering a eeprom from chs or ohms supplies they both carry them for this tv so may be a common problem not many main boards for sale with all matching numbers i have searced ebay etc.

[vinceroger69]

Re: Bushle-46gl12e

Well... not thaaaat fast... You have STBY voltage. So first check if the main board returns PSon to the power supply. If that main board does not return PSon voltage to the power supply, the TV simply does not turn on.
You may have a bad main board, let it be an Eeprom problem or the main IC.

the trouble i have i cant find a psu schematic to find out which is the pson wire etc its like the sets trying to boot for 12 seconds then seems to get stuck and re boots.

[budm]

Re: Bushle-46gl12e

The labels for the pins are on the bottom side of the board.
MP4618

[vinceroger69]

Re: Bushle-46gl12e

Thanks budm thats one place i did not look as yet, regarding jumping the psu which pins do i use a 1k resistor across many thanks.

[CapLeaker]

Re: Bushle-46gl12e

Again, first measure the voltages on those pins, since you have the pin out now and post them here.

[vinceroger69]

Re: Bushle-46gl12e

Again, first measure the voltages on those pins, since you have the pin out now and post them here.

Hi yes i will measure them asap once my visitors have gone etc as its christmas day here so maybe have to wait untill tomorrow untill i can post all readings.

[vinceroger69]

Re: Bushle-46gl12e

The labels for the pins are on the bottom side of the board.
MP4618

thanks budm the voltages have just been tested with set in stanby and whilst its trying to boot for 12 seconds with just a dull blue screen no side buttons etc
no on screen menu etc
please see budms picture for bottom view of board with pinouts i cant add to this post sorry.
CNO2
PIN 1 NC
PIN 2 NC
PIN 3 SB 0 VOLTS ON 5.2
PIN 4 SB 0 VOLTS ON 5.2
PIN 5 SB 0 VOLTS ON 4.5 pson
PIN 6 SB 5.2 VOLTS ON 5.2
PIN 7 NC
PIN 8 NC
PIN 9 10 11 EARTHS
PIN 12 SB 0 VOLTS ON 12.9
PIN 13 SB 0 VOLTS ON 12.9

CNO3
PIN 1 SB 0 VOLTS ON 23.2
PIN 2 SB 0 VOLTS ON 23.2
PIN 3 4 EARTHS

CN04

PIN 1@2 NC
PIN 3 SB 0 VOLTS ON 5.1
PIN 4 SB 0 VOLTS ON 1.6
PIN 5 EARTH
PIN 6 NC

CN05
PIN 1 SB 0 VOLTS ON 93.6
PIN 2 SB 0 VOLTS ON 0.04
PIN 3 SB O VOLTS ON 0.04

CN06
PIN 1 SB 0 VOLTS ON 93.6
PIN 2 SB O VOLTS ON 1.6
PIN 3 SB 0 VOLTS ON 1.6

So guys whats your thoughts? is it worth trying a eeprom as voltages look ok? as no mains available cheers guys.

[vinceroger69]

Re: Bushle-46gl12e

Guys i have updated the voltage readings whith the correct pinout voltages from the board does this look like eeprom issue? cheers guys.

CNO2
PIN 1 NC GND
PIN 2 NC GND
PIN 3 SB 0 VOLTS ON 5.2 + 5 VOLT
PIN 4 SB 0 VOLTS ON 5.2 + 5 VOLT
PIN 5 SB 0 VOLTS ON 4.5VOLT PSON
PIN 6 SB 5.2 VOLTS ON 5.2 5 VOLT VSB
PIN 7 NC + 5 VOLT
PIN 8 NC + 5 VOLT
PIN 9 10 11 EARTHS
PIN 12 SB 0 VOLTS ON 12.9 +12 VOLT
PIN 13 SB O VOLTS ON 12.9 +12 VOLT


CNO3
PIN 1 SB 0 VOLTS ON 23.2 +24 VOLTS
PIN 2 SB 0 VOLTS ON 23.2 +24 VOLTS
PIN 3 4 EARTHS

CN04

PIN 1@2 NC +12 VOLTS
PIN 3 SB 0 VOLTS ON 5.1 BK/ON
PIN 4 SB 0 VOLTS ON 1.6 ADJ
PIN 5 EARTH
PIN 6 NC

CN05
PIN 1 SB 0 VOLTS ON 93.6 +LED
PIN 2 SB 0 VOLTS ON 0.04 -LED
PIN 3 SB O VOLTS ON 0.04 -LED

CN06
PIN 1 SB 0 VOLTS ON 93.6 +LED
PIN 2 SB O VOLTS ON 1.6 -LED
PIN 3 SB 0 VOLTS ON 1.6 -LED

[vinceroger69]

Re: Bushle-46gl12e

Guys any thoughts regarding the voltages ive provided above i cant find a replacement main anywhere but the eeprom is available do you guys think its worth a try?

[CapLeaker]

Re: Bushle-46gl12e

CN05 and CN6 measure the voltage between + and -.
Other than that, it's worth a trying an eeprom.

[vinceroger69]

Re: Bushle-46gl12e

CN05 and CN6 measure the voltage between + and -.
Other than that, it's worth a trying an eeprom.

The voltage between the + and - is 93 volts on both cn05 and cn06 i will try to unsolder the eeprom later as still learning and very small traces (no hot air station) if i can remove ok i will order one

[vinceroger69]

Re: Bushle-46gl12e

Just to update this thread i have today ordered a pre programmed eeprom from ohms supplies i will update again once ive fitted it.

[cheeky2]

Re: Bushle-46gl12e

Any news as I have just been given the same model TV with the same issues as yours?
If its the eeprom then it sounds like an easy fix.
I look forward to hearing from you.

[vinceroger69]

Re: Bushle-46gl12e

Hi sorry only just got around to having a go at the repair yes the eeprom has fixed the issue the set seems fine i will run it later for a few days to confirm its ok.I ordered the eeprom from ohm supplies about £23.00 a word of warning the tracks/pads lift very easy i did lift and break one but managed to solder a small copper wire onto the track and then fitted the eeprom.