Hello everyone.
Just got from ebay a dead ( *almost ) smart auto-battery charger. It turned out that the mains part of the SWMPS is fried.
It looks like there has been an arc between NTR1, C6, JP24 and the resistor near them. Part of the jumper wire has been evaporated.
The resistor goes to leg3 of the optocoupler O3 ( which seems to be dead open on that side ).
On the other side of the board, there is a hole in the optocoupler path to the resistor, most likely caused by an arc between it and the nearby leg of C10.
Also there is an exploded transistor(?) marked N5.
The pcb lacquer over the path next to the main positive rail fell when I was using the pen.
So far I have found the following parts to be dead:
F1, on the input, right next to C1
D3 - one of the diodes to the negative rail has shorted
O3 - open on the transistor side
Z3 - shorted
N5
The charger is RING RSC612/RESC612
The board is WYH6859J-A6.PCB
The main SWMPS IC is UC3842B with UCS3842B
The secondary/standby SWMPS is RCP 36R DB(?)
So any schematics will be appreciated.. or at least any ideas with what to substitute the exploded N5... also, which other components are very likely to have lost their magic smoke?
Thanks in advance.
*almost dead, because the smart part should have some functionality when a battery is connected ( TEST mode ).. at least according to the seller.
Just got from ebay a dead ( *almost ) smart auto-battery charger. It turned out that the mains part of the SWMPS is fried.
It looks like there has been an arc between NTR1, C6, JP24 and the resistor near them. Part of the jumper wire has been evaporated.
The resistor goes to leg3 of the optocoupler O3 ( which seems to be dead open on that side ).
On the other side of the board, there is a hole in the optocoupler path to the resistor, most likely caused by an arc between it and the nearby leg of C10.
Also there is an exploded transistor(?) marked N5.
The pcb lacquer over the path next to the main positive rail fell when I was using the pen.
So far I have found the following parts to be dead:
F1, on the input, right next to C1
D3 - one of the diodes to the negative rail has shorted
O3 - open on the transistor side
Z3 - shorted
N5
The charger is RING RSC612/RESC612
The board is WYH6859J-A6.PCB
The main SWMPS IC is UC3842B with UCS3842B
The secondary/standby SWMPS is RCP 36R DB(?)
So any schematics will be appreciated.. or at least any ideas with what to substitute the exploded N5... also, which other components are very likely to have lost their magic smoke?
Thanks in advance.
*almost dead, because the smart part should have some functionality when a battery is connected ( TEST mode ).. at least according to the seller.
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