View previous topic :: View next topic |
Author |
Message |
thefixer Guest
|
Posted: Sat Jun 07, 2008 8:53 pm Post subject: vertical problem |
|
|
hello every body ,I have Siera tv model sa2110 it has analog processor and analog processor tda9381ps/n3/2/1831.vertical chip is la78040.i checked its voltage supply it is about 16v .i substitute that chip but in vain .I think that there is no vertical signal .any one tohelp me with this .thanks in advance. |
|
Back to top |
|
|
minnie
Joined: 18 Aug 2005 Posts: 2880 Location: Hell
|
Posted: Sat Jun 07, 2008 9:14 pm Post subject: |
|
|
Have you replaced the pump up cap? Replace all the caps around the vertical IC. Depending on the age, the B+ should come off the flyback, go threw a protect resister then diode. You probably fried the IC again. |
|
Back to top |
|
|
thefixer Guest
|
Posted: Thu Jun 12, 2008 10:46 am Post subject: vertical problem |
|
|
[quote="minnie"]Have you replaced the pump up cap? Replace all the caps around the vertical IC. Depending on the age, the B+ should come off the flyback, go threw a protect resister then diode. You probably fried the IC again.[Yes i verified all cap around it .all components are ok.Finally i find that 7808 regulator doesn't work well .it was the cause.Thanks again for your advice |
|
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 :
fdms8670s Fairchild Semiconductor • s a 18 panasonic • 15mm itautec • 04-TI-005 panasonic • KSC [radial non-polar] NM Series KSC [Ki • CTM511 teac • [radial thru-hole] KLH Series Koshin • 2sd1716 Inchange Semiconductor • ixta2n100 ixtp2n100 Ixys • pm3244 mods Philips •
|