Just got one of these for £10 for a project I am doing. I am new to TVs in general apart from looking like a genius for replacing obvious bad caps.
Tries to turn on, front LED goes from red to green, then relay sound and kicks off.
On the control board there is an LED that lights green, and another one that starts flashing and then, when relay kicks, it goes off.
Power Board.
Tested voltages of power board, all seems fine. Caps look good, but looks are not everything. Waiting for a cheap ESR meter to arrive before further investigation. Did test some diodes in circuit though, and while they were around .450 ish, a few of them were reading 1.800 ish in reverse. This I think is because they were in circuit.
From the ysus on the left there is another board on right side, quite thick wires joining them, I think that is the xsus (correct me if it is the zsus). Disconnected what I think is the xsus from the ysus. Fault remained.
Reconnected the xsus to the ysus, disconnected the ysus from the psu, fault disappeared.
Reconnected the ysus to the psu, removed the mainboard (hdmi, scart ect) from the psu, fault disappeared.
My next move is to remove the ysus board, and probe ground while running dmm across the connectors (it is a single ysus / buffer board).
Thoughts, tips, for a new to tv repair person appreciated.
Hopefully, we can get this thing rocking and I can move on to next stage of project. Which is a virtual pinball machine. As such the TV is allowed some niggly faults, as it is for the backglass and will not be watched like a TV, just for decoration. So I may have a go at replacing buffer ICs if I need to just to get something on it / and practise.
Tries to turn on, front LED goes from red to green, then relay sound and kicks off.
On the control board there is an LED that lights green, and another one that starts flashing and then, when relay kicks, it goes off.
Power Board.
Tested voltages of power board, all seems fine. Caps look good, but looks are not everything. Waiting for a cheap ESR meter to arrive before further investigation. Did test some diodes in circuit though, and while they were around .450 ish, a few of them were reading 1.800 ish in reverse. This I think is because they were in circuit.
From the ysus on the left there is another board on right side, quite thick wires joining them, I think that is the xsus (correct me if it is the zsus). Disconnected what I think is the xsus from the ysus. Fault remained.
Reconnected the xsus to the ysus, disconnected the ysus from the psu, fault disappeared.
Reconnected the ysus to the psu, removed the mainboard (hdmi, scart ect) from the psu, fault disappeared.
My next move is to remove the ysus board, and probe ground while running dmm across the connectors (it is a single ysus / buffer board).
Thoughts, tips, for a new to tv repair person appreciated.
Hopefully, we can get this thing rocking and I can move on to next stage of project. Which is a virtual pinball machine. As such the TV is allowed some niggly faults, as it is for the backglass and will not be watched like a TV, just for decoration. So I may have a go at replacing buffer ICs if I need to just to get something on it / and practise.
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