Re: Harman Kardon AVR130 - Issues
Thanks again. After some time it did start to remember things. So I guess it needed some time to restore itself. Probably because of the new battery....
revelations
Senior Member
Last Activity: 02-27-2018, 09:52 AM
Joined: 01-30-2018
Location: Gouda
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Re: Harman Kardon AVR130 - Issues
Ah interesting. I do have a problem. It's not saving or remembering the frequency for the radio. After a time it's gone. When powered off. The black one does remember it. Any idea where the memory is locaties for that part?Leave a comment:
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Re: Harman Kardon AVR130 - Issues
Yep! Still a bit strange, first time i placed the battery back it didn't work, after hitting the 3 pins it started to work. resoldered those pins and the display works aswell. Great sound, everything works perfectly.
Still it kinda leaves me with an unanwsered question. What was the problem? Especially since i already had resoldered and desoldered the display twice. maybe its a combination of leaving the battery out for so long + display pins back.
I would like to thank everyone for helping, Especially RJ!...Leave a comment:
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Re: Harman Kardon AVR130 - Issues
I resoldered the 3 pins on the right side of the display, now suddenly the display works aswell. But the left side isn't resoldered yet. Photo is left side 3 pins + 1 pin resistor...Leave a comment:
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Re: Harman Kardon AVR130 - Issues
Ill try to resolder them. See photo for the 3 pins I touched...Leave a comment:
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Re: Harman Kardon AVR130 - Issues
So I finally had some time to put the battery back, outcome still nothing. So then I thought or actually without thinking I hit the 3 pins on the right side of the lcd, and suddenly the machine turned on. But no lcd display. Tho I had desoldered the pins last time, see photo. Blue standby led turned on, volume turned on, and relays turned on aswell....Leave a comment:
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Re: Harman Kardon AVR130 - Issues
shorting those results in no lcd or lights at all. Just the Transformator switching onLeave a comment:
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Re: Harman Kardon AVR130 - Issues
In standby mode they have the same temp on all ic's, ive also checked the old battery and after a few days it suddenly gave me 3.6v again. So I guess that battery wasn't defect after all. Ill desolder the new battery and it leave it out for a few days...Leave a comment:
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Re: Harman Kardon AVR130 - Issues
So ive measurred everything we have discucced earlier and here's the outcome, it's the same between both units
[B]DEFECTIVE UNIT (SILVER)[/B]
BN80 PIN4 = 0v , PIN 5 = 0v
BN88 PIN4 = 3.4v if standby pressed = 0v
BN81 PIN6 = 5v , PIN8 = 3.4v (reset)
L702 = 5v
D761 = 3.4v one side, other side 4.3v
IC72 - > PIN96 - > Q726 = 0v pin1&3
IC72 - > PIN96 - > Q743 = 5v pin1&3
J804 = 0v
IC85 PIN1 =3.4v, PIN2 = 3.4v, PIN3 =0v
J706 = 3.4v
J700 = 0v...Leave a comment:
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Re: Harman Kardon AVR130 - Issues
The video input is connected yes, ive seen videos where people had those prints taken out completely and the machine still turned on, don't believe it matters, since its just an input boardLeave a comment:
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Re: Harman Kardon AVR130 - Issues
What i did was, after i turned the amp on and saw the blue standby and the volume led on but no display, i turned the device off. openend the case. hit the manual reset. didn't work the first time. so hit it a couple of times (people said that could work)
And then all i did was removing the video input board. to see if something was up, then put it back together. and it stopped turning on, stayed red from that moment....Leave a comment:
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Re: Harman Kardon AVR130 - Issues
Ah, ive measurred again and indeed the voltage is going to zero when turned off. Unfortunately I have no scope and they are expensive around here.
I when the system did work the silver one I had already pushed that button and it didnt change a thing. To bad because now I think the system did work, power button went blue and the volume button aswell, just no display. And soon after it didn't turn on at all. So if I resoldered the display it might had worked.Leave a comment:
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Re: Harman Kardon AVR130 - Issues
See attached photo. The working AVR has 8.3/4voltage on those pins, the broken AVR does not. interesting.
But i can't remove all the solder to fix it back to its original situation. is that a problem?...Leave a comment:
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Re: Harman Kardon AVR130 - Issues
Ill make a photo of the correct and "wrong"soldering.
And i have not, i was afraid of damaging the working front panel? do you think it won't harm? if i try thatLeave a comment:
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Re: Harman Kardon AVR130 - Issues
Sorry no that was on the old machine, ive soldered those, but i don't know if its correct ofcourse.
So here is what i just did. I took off the front panel of the [B]broken [/B]machine and [B]swapped [/B]it with the working machine. Result = Front panel not turning on (except standby amber)
So then i put the original front panel back on the working machine and that works fine ofcourse.
I guess that tells us for sure something is wrong with the front panel of the broken machine.Re: Harman...Leave a comment:
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Re: Harman Kardon AVR130 - Issues
No idea if the display is working.
Regarding the reset pin, ive checked it again on both machines. the voltage on PIN 1 and 2 are 3.2/3.4voltage for both AVR's so i guess thats correct?
I was wondering, could it be that the system is in protection mode due to a failure somewhere on the main pcb maybe?...Leave a comment:
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Re: Harman Kardon AVR130 - Issues
1 of the 4 pins is connected to C891 the other 3pins are attached to the display....Leave a comment:
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Re: Harman Kardon AVR130 - Issues
ill make a photo of that situation.
The reset pin has 3.4voltage now and doesn't cycle. so i think thats cleared...Leave a comment:
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Re: Harman Kardon AVR130 - Issues
New battery installed bit thick but fits. However it's not turning on. And I tried the master reset wich didn't do it either. I did notice the reset pin is now stable and not cycling anymore.
Also not sure what to do with those 4 pins they aren't solderen together on the new machine I bought. However they are on the older one. Not sure if it can harman if I resolder those pins?...Last edited by revelations; 02-07-2018, 10:51 AM.Leave a comment:
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Re: Harman Kardon AVR130 - Issues
So ive bought another Harman kardon avr 130 one that works and testen it's battery. It's exactly 3.6volts. So Somehow that other battery got toasten. Ill replace it and hope for the best....Leave a comment:
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