View previous topic :: View next topic |
Author |
Message |
jonnyboy
Joined: 27 Nov 2006 Posts: 15 Location: south uk
|
Posted: Thu Dec 07, 2006 8:07 pm Post subject: bush dvd142tv (tv/dvd combi) stuck in standby (vestell ak46) |
|
|
hi, this set is stuck in standby but when turned out of standby trips and returns to standby, on inspection i found the lopt was badly dry jointed, i reflowed it and tryed again, it was still the same so i checked the line output transistor (bu808dfi) but this seemed ok, to check this was ok i swapped it out for a bu508dfi and turned the set on, the eht started but then the transistor went totally s/c.has anyone had a similar problem or a diagram? could it be the lopt shorted? the ht is around 114v and the chassis is a vestell ak46, thanks for your time, jon. |
|
Back to top |
|
|
Guest
|
Posted: Thu Dec 07, 2006 9:29 pm Post subject: |
|
|
Hi there, had the same problem with two of these! Take a very careful look at the soldering in the lopt area. I found many components with one leg not fully pushed through the board before soldering and many suspect joints. One ate
5 BU508DFI's before I found the bad connection!
Regards
John. |
|
Back to top |
|
|
jonnyboy
Joined: 27 Nov 2006 Posts: 15 Location: south uk
|
Posted: Fri Dec 08, 2006 7:06 pm Post subject: |
|
|
thanks for that john, did the bu508dfi fail straight away nearly or did it take a whilke as when it failed on this set it was almost instant. is it ok to use a bu508df in place of a bu808dfi? thanks again, jon. |
|
Back to top |
|
|
Guest
|
Posted: Mon Dec 18, 2006 5:43 pm Post subject: |
|
|
never had this before, but good luck. |
|
Back to top |
|
|
HappyXmas Guest
|
Posted: Sat Dec 23, 2006 2:07 pm Post subject: |
|
|
Hi.
This was a very useful tip - thanks
Just reparied a set with similar symptoms. Except with this one the TV worked but no picture, and wouldn't switch to DVD. Tray wouldn't eject or anything. This had been playing up on & off for a month or so, but then went completely. Still got TV sound, but nothing else worked
Found 2 dry joints on the LOPT. Re-soldered and alls well again
NB: Without this I may have spent ages looking for PSU problems
Don't have a manual or CCT for this, but I guessed that the LOP stage generates the power for the DVD section. Anyway - all fixed now
Thanks a lot.
B. |
|
Back to top |
|
|
|
|
|
You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
eServiceInfo on FB -
Service Manuals Free Download -
Service Diagrams
Free TV Schematics Download -
HARDW.net -
Pinout Master -
Jabse Service Manual Search -
Jabse.InK -
onTap.bg
SnimkiOt.com -
Poblizo.com : пътешествия
Latest Service Manuals :
C1570 Lite On • General EP4000 023 Minolta • toshiba 289x6m TOSHIBA • Panel CMO N156B3-L02 0 [DS] . Various • MQM100216 MB98 V2 panasonic • Panel AUO T260HW02 V1 1 [DS] . Various • 46F500 Hitachi • HCD-S500_800 Sony • DSC-W5 W7 W15 W17 Sony • MMD430DZX ET-SB-EX-SI 1360147292 Samsung •
|