electronics, repairs, service manuals and datasheets discussion community for the repairs professionals and technicians
FAQSearchMembersGroupsRegisterProfilePM'sLogin/Out
Panasonic TX-W32D2DP silly question?
Goto page 1, 2, 3  Next
 
Post new topic   Reply to topic    Electronic equipment repair and service manual search discussion Forum Index -> Equipment Repairs
View previous topic :: View next topic  
Author Message
SteveT
Guest





PostPosted: Tue Apr 29, 2008 6:23 am    Post subject: Panasonic TX-W32D2DP silly question? Reply with quote

Can anybody point me in the right direction of the Line Output Transistor & Transformer. I have the service manual and looking for the component numbers.
Thanks
Back to top
gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Tue Apr 29, 2008 8:04 am    Post subject: Reply with quote

q552 & t551
Back to top
View user's profile Send private message
SteveT
Guest





PostPosted: Tue Apr 29, 2008 3:07 pm    Post subject: Reply with quote

Thanks Gary
I am having problems here. I dont normally do TV's, but this is my own.
I have until the weekend to fix it or it goes to the tip!
I have the service manual which shows the voltages at test points, but dont know how to test when the circuit is not powered. RL806 has 240VAC and that is as far as i can get, any help would be appreciated.
Cheers
SteveT
Back to top
gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Wed Apr 30, 2008 8:32 am    Post subject: Reply with quote

if set does not start with burst of eht check for short circuit between collector of line output transistor and ground, if short circuit replace transistor and check for dry joints on line drive transformer, if no dry joints present replace line output transformer.
Back to top
View user's profile Send private message
SteveT



Joined: 29 Apr 2008
Posts: 15

PostPosted: Wed Apr 30, 2008 12:50 pm    Post subject: Reply with quote

Thanks Gary.
There is no burst of eht. No short on collector.
Base and emitter are both short to earth but i presume correct without power.
Anything else?
(I think im getting into this now)

Thanks
Steve
Back to top
View user's profile Send private message
gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Thu May 01, 2008 8:08 am    Post subject: Reply with quote

remove the line output transistor, solder a 60w 240v light bulb across c861, switch set on, if bulb lights fault is more than likely in the line stage, if it doesnt its in the psu,
Back to top
View user's profile Send private message
SteveT



Joined: 29 Apr 2008
Posts: 15

PostPosted: Thu May 01, 2008 8:13 pm    Post subject: Reply with quote

Thanks again Gary, I really appreciate this.
I have done as instructed and the light did not come on.
There is no voltage accross C861.
(I must be getting near the fault now)
Cheers
Steve
Back to top
View user's profile Send private message
gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Fri May 02, 2008 7:48 am    Post subject: Reply with quote

check q801 in psu for short circuit, if it is replace it, ic801,r823/4/5, d815,check r809 for open circuit, r820/1 for high resistance.
Back to top
View user's profile Send private message
SteveT



Joined: 29 Apr 2008
Posts: 15

PostPosted: Fri May 02, 2008 11:47 am    Post subject: Reply with quote

Thanks Gary.
Here we go.
Q801-no short.
R823/4/5-all OK.
R820/1-perfect.
R809-OK.
(Im scratching my head trying to understand what is happening. What causes RL806 to switch off? Is this the protection circuit?)
Thanks
Steve

PS-My wife has extended the going to the tip deadline- she thinks i am making progress!!
Back to top
View user's profile Send private message
SteveT



Joined: 29 Apr 2008
Posts: 15

PostPosted: Tue May 06, 2008 9:15 am    Post subject: Reply with quote

Not sure about D815.
How should it test?
Cheers
Steve
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 -> Equipment Repairs All times are GMT
Goto page 1, 2, 3  Next
Page 1 of 3

 
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