UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Television and Video

Notices

Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

Closed Thread
 
Thread Tools
Old 6th May 2020, 10:13 pm   #41
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
Default Re: Fixing a GEC BT 330 Television

I said to bridge F2 fuseholder because I assumed it was the blown fuse you mentioned back in post #1.

You MAY have to bridge the contacts of the mains switch ie S1 and S2 if they test open circuit.

Don't bridge L and N or there'll be a big bang should you plug the set in.
__________________
Graham. Forum Moderator

Reach for your meter before you reach for your soldering iron.
Station X is online now  
Old 6th May 2020, 10:26 pm   #42
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

Thats what i thought. it blow. dont worry I didn't do that. Yes ill bridge the fuse. Thanks lol
deepspacedaz is offline  
Old 6th May 2020, 10:34 pm   #43
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

I do have lots of spare fused but they are the modern 3 amp the TV takes 1.2 amp I believe
deepspacedaz is offline  
Old 6th May 2020, 11:06 pm   #44
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

will 3 amp do damage?
deepspacedaz is offline  
Old 6th May 2020, 11:08 pm   #45
Chris55000
Nonode
 
Join Date: Aug 2007
Location: Walsall Wood, Aldridge, Walsall, UK.
Posts: 2,853
Default Re: Fixing a GEC BT 330 Television

Hi!

Servicing articles for your chassis are here:–

https://www.americanradiohistory.com...on-1972-01.pdf

https://www.americanradiohistory.com...on-1972-02.pdf

. . . altho' the articles are entitled "BT302 Series" all the circuit references, valve types, etc., are the same as your set!

If you're not getting any of the valves lighting I would switch off the set, unplug it from the mains and begin by measuring across the plug pins for a continuity reading, which should be about 150–250 ohms with all the valves cold.

No readings could be a blown fuse, a section of the "mains tapping unit" open circuit, or a valve with an open–circuit heater, and I should make you aware the receiver valves, which are Z329 or 30F5, have 7.3V 0.3A heaters and these valves did have a nasty tendency to be unreliable with regular heater failures, so do check all of these for continuity between pins 4 and 5.

Fuse–blowing at switch–on may be the mains filter capacitor, or if you've removed this, a short across the h.t. line, very tricky to find unless you're experienced with TV faults!

Chris Williams
__________________
It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!

Last edited by Chris55000; 6th May 2020 at 11:24 pm.
Chris55000 is offline  
Old 6th May 2020, 11:13 pm   #46
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

Thank you so much Ill print them out tomorrow.
deepspacedaz is offline  
Old 7th May 2020, 3:42 pm   #47
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
Default Re: Fixing a GEC BT 330 Television

Quote:
Originally Posted by deepspacedaz View Post
I do have lots of spare fused but they are the modern 3 amp the TV takes 1.2 amp I believe
According to the service sheet internal fuse F1 is rated at 0.5A and internal fuse F2 is rated at 1.5A. You can test these fuses by checking them for continuity with your meter. They should read close to zero ohms.

For testing purposes WITH NO MAINS POWER APPLIED you can fit any good fuse you like, or even bridge out the fuseholder. The same applies to the fuse in the mains plug.
__________________
Graham. Forum Moderator

Reach for your meter before you reach for your soldering iron.
Station X is online now  
Old 7th May 2020, 7:36 pm   #48
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

Thanks again so you think i should fire up and see what happens ?
deepspacedaz is offline  
Old 7th May 2020, 8:37 pm   #49
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
Default Re: Fixing a GEC BT 330 Television

NO!. Do not apply power at present.

Let's take this in very small steps. Test F2 and the fuse in the mains plug and come back with the results.
__________________
Graham. Forum Moderator

Reach for your meter before you reach for your soldering iron.
Station X is online now  
Old 7th May 2020, 8:49 pm   #50
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

Ok no problem im on it
deepspacedaz is offline  
Old 7th May 2020, 9:07 pm   #51
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

F2 Im assuming you mean fuse 2 ?
deepspacedaz is offline  
Old 7th May 2020, 9:13 pm   #52
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

There is no plug on set as I have removed it the fuse is good
deepspacedaz is offline  
Old 7th May 2020, 9:26 pm   #53
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
Default Re: Fixing a GEC BT 330 Television

Quote:
Originally Posted by deepspacedaz View Post
F2 Im assuming you mean fuse 2 ?
Yes.
__________________
Graham. Forum Moderator

Reach for your meter before you reach for your soldering iron.
Station X is online now  
Old 7th May 2020, 9:26 pm   #54
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
Default Re: Fixing a GEC BT 330 Television

Quote:
Originally Posted by deepspacedaz View Post
There is no plug on set as I have removed it the fuse is good
Which fuse is good?
__________________
Graham. Forum Moderator

Reach for your meter before you reach for your soldering iron.
Station X is online now  
Old 7th May 2020, 10:01 pm   #55
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

All fuses are good
deepspacedaz is offline  
Old 7th May 2020, 10:08 pm   #56
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,192
Default Re: Fixing a GEC BT 330 Television

Fit F2 and go back to post #35.
__________________
Graham. Forum Moderator

Reach for your meter before you reach for your soldering iron.
Station X is online now  
Old 7th May 2020, 10:19 pm   #57
EtiDan2001
Triode
 
Join Date: Apr 2020
Location: Surrey, UK.
Posts: 12
Default Re: Fixing a GEC BT 330 Television

Hi when you get a chance to change more capacitors, you might want to replace the black Hunt ones as they will be pretty terrible by now.
EtiDan2001 is offline  
Old 8th May 2020, 10:49 am   #58
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

OK I will do that that.
deepspacedaz is offline  
Old 8th May 2020, 11:31 am   #59
deepspacedaz
Hexode
 
deepspacedaz's Avatar
 
Join Date: May 2020
Location: Matlock, Derbyshire, UK.
Posts: 461
Default Re: Fixing a GEC BT 330 Television

do you think I should change them all ?
deepspacedaz is offline  
Old 8th May 2020, 11:41 am   #60
ms660
Dekatron
 
ms660's Avatar
 
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
Default Re: Fixing a GEC BT 330 Television

Quote:
Originally Posted by deepspacedaz View Post
do you think I should change them all ?
At some point.

Best to replace the ones likely to cause damage/burn ups then head for first light (some sort of raster displayed) and take it from there. No point in spending lot's of time effort money etc then switch on only to find an unrepairable/unobtainable part is duff such as a transformer or CRT.

Lawrence.
ms660 is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 12:56 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.