View previous topic :: View next topic |
Author |
Message |
zorgue Guest
|
Posted: Sun Feb 04, 2007 10:58 am Post subject: power suply oscilation |
|
|
I have a grundig mw70-2700 nic and don´t work bicause power suply at pin 7 of tda 4605-3 have litle oscilation (6v..9v).who i have eliminete these oscillaion?please i need your´s helps and sorry for my english,i´m portuguese and no speek english very well.thank´s. |
|
Back to top |
|
|
vtech
Joined: 08 May 2006 Posts: 1264 Location: USA
|
Posted: Sun Feb 04, 2007 6:42 pm Post subject: |
|
|
Not familiar with the set, however looking at TDA4605, pin 7 is generally used as a soft start by means of short pulses.
While there are many causes that could prevent startups, In general suggest looking at any & all electrolytic caps around the IC that could easily cause no-start in ANY chopper supply application--any cap in the range of 1-100 microfarads that are around the primary circuit. |
|
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 :
PCZ0504045C2 panasonic • SPEC-6517A D Mar 2009 Keithley • panasonic pv-m2021-k omnivision 583 pana • p6201 Tektronix • umd6n imd6a d6 sot23-6sot363 Rohm • B5X71A Philips • MECHANISM LG • hfe aiwa nsx-350m 351m 352m service en A • 80249704 panasonic • TVP0507 Sony •
|