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Equipment Repairs => LCD TV forum => Topic started by: astracat on December 20, 2020,10:09:58

Title: farnell l30bt psu
Post by: astracat on December 20, 2020,10:09:58

hi all,
does anyone have a circuit diagram for l30bt psu ,was charging a battery with it but went up in smoke its been very reliable up till then its a twin output
0 to 30 v
merry xmas to all and keep safe
regards
astracat

Title: Re: farnell l30bt psu
Post by: downunder on December 21, 2020,04:52:18

Hi Cat,

Is this the one you're after.

Title: Re: farnell l30bt psu
Post by: fix2003 on December 22, 2020,02:44:18

which version there are Germanium and silicon versions plus a later one with an IC

Title: Re: farnell l30bt psu
Post by: astracat on December 22, 2020,04:39:47

hi to all
its a non ic germanium transisters type
thanks for the diagram from downunder
only have ac127 types available ,should be ok to use as they,r only used to drive the output transistors witch are ok
main problem i have is a diode blown and 2 current detect resisters but burnt to a crisp unrecognise value
regards
astracat

Title: Re: farnell l30bt psu
Post by: fix2003 on December 23, 2020,02:48:54

have added to download section Farnell l l30bt germanium transistors type as for some reason could not ad  here ??

Title: Re: farnell l30bt psu
Post by: astracat on December 23, 2020,06:23:34

hi fix2003
thanks for the diagram hope to repair it now ,worked out why it blew it must have been cause i forgot to remove battery i was charging before  turning off
wont do that again haha
wish all a happy and safe holiday
regards
astracat

sorry fix2003
file not there in downloads perhaps you could send it to my email at (astracats@hotmail.com )

Title: Re: farnell l30bt psu
Post by: fix2003 on December 25, 2020,02:20:05

emailed to you

Title: Re: farnell l30bt psu
Post by: astracat on December 28, 2020,08:44:15

hi fix 2003 (vince )
thanks for the diagram received ok
its fixed now total faults was 2x zeners 1x transister 4x diodes for the bridge rectifier +fuse
regards
astracat
ps hope everybody had a safe &jolly christmas

Title: Re: farnell l30bt psu
Post by: fix2003 on January 05, 2021,02:34:02

perfect glad its sorted  :08: