Re: TCM 240020 repair
Thanks so far. I'll report....
Roman78
Senior Member
Last Activity: 06-11-2023, 12:49 AM
Joined: 10-04-2017
Location: Eifel
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Re: TCM 240020 repair
Ok.. so i have to order one. Don't have anything close here. Should i order one with exact the same values, so 3300uF 25V?Leave a comment:
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Re: TCM 240020 repair
Does it? I still measure over 3300uFLeave a comment:
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Re: TCM 240020 repair
Yes, the big one is C404, has 3300uF 25V. The one between IC401, Q403 and the fuse. Or some other Cap?Leave a comment:
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Re: TCM 240020 repair
I just removed the B1185 and put it into my testing device....Leave a comment:
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Re: TCM 240020 repair
The Q403 is a B1185 [url]http://www.datasheetcafe.com/b1185-datasheet-transistor/[/url]
Do i test that the same way?
The big capacitor still has his value of 3300uF I measured 3356uF
I got a big box of 0.25W Resistors here. There are 2 heatsinks on the 7805. Size about 20mmx15mm an 10 high.Re: TCM 240020 repair<br /> <br /> ...0uF I measuredLeave a comment:
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Re: TCM 240020 repair
Oh and i just found a 2.2 Ohm. That one is huge maybe 5 or more Watt. Won't fit on the circuit board.Leave a comment:
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Re: TCM 240020 repair
Sorry for the delay. There is a large heatsink on the KA7805. It is temporally removed.
The KA7805 seems to be working, i put 12V in and get 5.004V out of it.
I have a lot of 0.25W Resistors, but not many with a higher capacity. I found a 6.4 Ohm, hmm must be 1W, but not sure about that. Oh and i have 1.4Ohm 5WLast edited by Roman78; 02-25-2023, 09:39 AM.Leave a comment:
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Re: TCM 240020 repair
Bridge looks normal. One direction closed other one open.
IC 401 is a... gee where are my glasses....KA7805Leave a comment:
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Re: TCM 240020 repair
On the bridge rectifier ist written " GBU 8D AC"
The burned resitor goes to the IC401 indeed. To the right leg. The middle leg is goin to the negative of the bridge rectifier.Leave a comment:
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Re: TCM 240020 repair
Here are two pictures.
The burned resistor is just behind the positive side of the bridge rectifier. In Germany it is called Gleichrichter.
There goes 14V in, at least that is printed on the circuidboard near the 2 big red wires.
I'll could try to draw a diagram using kicad. Never used it, though....Leave a comment:
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TCM 240020 repair
I own a very cheap TCM 240020 mini stereo system. This one is for my children in there room. Yesterday the magic smoke came out...
I dissembled the broken device and found a burned resistor next to a ac/dc regulator (i don't know the correct English word for it).
The resistor is infinite.
See the pictures. Now the question is, what value could it have had?
I could not find any circuit diagram from this device. The board has 248-T80U02-147 printed on it.
And yes... it is Resistor 404.... -
Need Apple PowerBook G4 12" 820-1607 Schematics and BRD Files
I hope they exist. I got a faulty PowerBook G4 12" here, logicboard number 820-1607-A
Does someone has the schematics and BRD file for it? -
Re: Apple MBP 2009 17 820-2610A does not charge
It's so freaking small. I'll have a try.…..Leave a comment:
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Re: Apple MBP 2009 17 820-2610A does not charge
Is it the U7000?Leave a comment:
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Apple MBP 2009 17 820-2610A does not charge
I got a Apple MacBook Pro 17" from 2009 here, it came with the message its unstable and does not load the battery. Without the battery the LED is green. With the battery the LED is off, just flashing green every 6 seconds and i hear a ticking sound ever seconds or less.
U7000 Pin 17/18 - 21.6 Ohm
U7000 Pin 27/28 - 21.2 Ohm
PPbus-G3H 8.4 Volt
I got a spare logicboard here if needed some parts. -
Re: Apple Mac Mini 2009 820-2366
ohhh why not hmm that's bad.
I got one here, someone slipped with a screwdriver and destroyed 2 resistors. Now i just want to replace those, but i don't now the value.Leave a comment:
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Apple Mac Mini 2009 820-2366
Hi there ,
i need the schematics and BRD file for the Mac Mini 2009, 820-2366
Thanks -
Apple MBP 2015 13" 820-4925-A No display after standby
I got am Apple MacBook Pro 13" here from 2015. The U7700 was blown and i replaced it. The U7700 is for the control of the backlight. So with the blown U7700 the backlight wont turn on. Now i replaced the U770 with one from a spare Laptop, now the Backlight is working and also the machine it self.
But... after a standby the Display wont turn on. I see the backlight coming back, but there is no output on the screen. What could this be? Did i not connected the U7700 on all points? Something different also broken? -
Re: Apple MBP 2012 Retina lost Serialnumber
Hmmmm, I have a spare logicboard here, maybe i could use the Firmware from that one.Leave a comment:
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