Hello. Please help. la-g07jp rev1.0 does not turn on. The 3 and 5 volt alarm goes up for 2 seconds and goes out. I opened the 3 and 5 volt power jumpers, removed the pu302, flashed the multimcontroller with different firmware, nothing helped. I noticed that on the u4104 the output is 1.5V, this voltage goes to the combined processor. Should there be such tension there?
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I have a few standby voltages that are 0, as seen in the picture. Is the Panasonic chip broken? In the picture I have all my voltages.
...04-08-2024, 08:04 AM -
Hi chaps.
Having recently picking up two dead 2008 iMacs, one is now working, however there is still one to repair.
I was told that they both had failed power supplies, and seeing how I intend to crack SMPS repairs, it was a challenge not to ignored.
Anyway, this PSU in question had already had someone having a pop at soldering.
The current problem is (at the very least) in the primary side.
Fuse is ok
MOV is ok
NTC is ok
Bridge rectifier is ok (~380vDC)
Fat filter cap is ok
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Hello guys,
I have a Philips 240B7QPJEB. The monitor seems completely dead.
I opened it and measured the voltages of the powersupply. I found that a mosfet was dead and replaced it.
On the connector, that goes to the TCON board, all voltages 15-19V and 5V are present.
The small connector on the left of the PSU has two cables with 18V and all the other have 0.2V. It connects on this small connector on the left ontop of the panel. I guess the backlight? Seens fine I guess.
The weird thing is, that the Power LED is powered over the TCON board.
On The TCON...12-28-2024, 02:12 PM -
Hello forum. I've recently been given a Yamaha TSX 120 DAB radio and ipod dock. Its working well however when put on standby its using 6.3 watts. The manual states less than 1 watt on standby. I measured this with a plug in monitor which seems accurate with other items. In use it uses around 7.5 watts. Firstly has anyone who owns a similar radio also got a plug in monitor to check if this is normal with this unit? In the first half a second the monitor shows 0.3 watts which I suspect is what it should use but something is switching it to be almost fully powered. I've searched the manual for eco...03-01-2024, 07:25 AM -
Hello, guys!
The same 32" Philips TV I was having video issues, but now I don't have standby led at all. Someone here shared with me the schematic of the power supply, and checking the voltages, I see right after the resistor R604 I'm getting 1.6 v which is too low for enabling the Gate of the Q601 mosfet (the diagram says 4.2). On the R614 resistor I'm getting 181 V in and 117 V out, then through R603 I'm getting the same 117 V in and 59.9 V out, finally getting the latter voltage in the R604 BUT getting just 1.6 V out, which is the voltage that goes on to the Gate of the Q601...