Question about replacement of Bridge Rectifier of Monitor PSU/Inverter board

Thread Starter

UnnamedUser159

Joined May 3, 2016
501
If i watch pdf of this board
715g813-1 Ver:C i see
U4KB80R 800v/4a

Where i keep stuff from this monitor i have pbl405 which should be faulty(desoldered from the board) and one working gbu405.

The questions :
why in documentation there is diode with 800V but on board most probably was 600V
i will put the 600V. If something goes wrong only BD will goes faulty or not?

thanks
 

Thread Starter

UnnamedUser159

Joined May 3, 2016
501
and the next question - shorted fr107. In the shop they had not such.

Fr107 is fast recovery rectifier 1000/1
1n4007 is only rectifier 1000/1

Will it do the job?
 

dendad

Joined Feb 20, 2016
3,564
There is no real reason not to put a higher voltage bridge rectifire in there. I would not use a 400V one on 240VAC supply. That does not give enough headroom for tranzients. Higher is better. It giver you a more robust power supply so it should be more reliable.
 
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