electronics, repairs, service manuals and datasheets discussion community for the repairs professionals and technicians
FAQSearchMembersGroupsRegisterProfilePM'sLogin/Out
Panasonic Tv/ VHS combo, model# PVQ-2512

 
Post new topic   Reply to topic    Electronic equipment repair and service manual search discussion Forum Index -> Electronics General
View previous topic :: View next topic  
Author Message
maverick



Joined: 13 Jan 2006
Posts: 26
Location: Paradise!

PostPosted: Tue Jun 13, 2006 10:22 am    Post subject: Panasonic Tv/ VHS combo, model# PVQ-2512 Reply with quote

Hi, I have this unit and it shut off in a recent power outtage and never powered back on. The green status light on front comes on but when i press power I don't get anything. I checked the HOT and surrounding components and the power supply section but couldn't find any defective components. Could it be the flyback?
Back to top
View user's profile Send private message MSN Messenger
vtech



Joined: 08 May 2006
Posts: 1264
Location: USA

PostPosted: Tue Jun 13, 2006 10:40 am    Post subject: Reply with quote

While there is always a possibility of a defective flyback, more than likely it is NOT. If the set failed during a storm/power surge, it is probably an issue with the power supply &/or syscon ckt--perhaps a relay driver txistor---do you hear a relay click? or some sort of component failure in secondary power supply. Need to tshoot further.
Back to top
View user's profile Send private message
Guest






PostPosted: Wed Jun 14, 2006 11:20 am    Post subject: Reply with quote

yes I can hear the relay engage and then disengage after a short instant when I press the power button.
Back to top
maverick



Joined: 13 Jan 2006
Posts: 26
Location: Paradise!

PostPosted: Tue Jun 20, 2006 3:00 am    Post subject: Reply with quote

yes I can hear the relay engage and then disengage after a short instant when I press the power button.
Back to top
View user's profile Send private message MSN Messenger
vtech



Joined: 08 May 2006
Posts: 1264
Location: USA

PostPosted: Wed Jun 21, 2006 9:26 am    Post subject: Reply with quote

Ok, can't be sure, but sounds like either some type of short is pulling down on one of the supply lines, or perhaps HV shutt down circuit iis kicking in. Have to get a schematic to test & troubleshoot.

Based on experience with panasonic combos, I can tell you that HV circuit transistors are easily damaged during power surges.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Electronic equipment repair and service manual search discussion Forum Index -> Electronics General All times are GMT
Page 1 of 1

 
Jump to:  
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


Електроника София - Service Manuals Free Download - Prikachi - Service Diagrams

Free TV Schematics Download - HARDW.net - Pinout Master - Jabse Search - Jabse.InK  - Pulsator

Connector Pinout Forum - Новини - SnimkiOt.com - безплатен DNS - Whois разузнаване - Poblizo.com : пътешествия