Yes, speakers I'm using for testing is 8 ohms standard basic. And they working.
I looked through schematics, and considering to disassemble entire front, remove radiator to get access to transistors and diodes.
Can't measure anything thro outputs becoz there are relays between transistors and outputs.
Also this thing is big and everything is cramped inside in a small factor. Annoying device to say the least
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(2) For ASO (when the last protection incident was ASO protection)
FLD P R T : A S O
Cause: The line between speaker terminals is shorted, or use speakers having impedance less than that specified.
Supplementary information: As the excess current is detected after operation of the speaker relay, the shorted
speaker terminal and the connected speaker can be identified.
Turning on the power without correcting the abnormality will cause the protection function to work about 5 seconds
later and the power supply will be shut off.
this is what i i...
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Marantz NR1601 No Sound, Schematics attached.
Certainly! Here's a revised version of your text:
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I own a Marantz NR1601 receiver, but unfortunately, I'm experiencing an issue with no sound coming from any of the outputs. I'm seeking assistance to identify the most likely cause of the problem.
The unit powers on without any issues and seems to be functioning properly. I've noticed that the relay clicks after about 10 seconds, indicating that it's going through its startup sequence. There are no visible signs of damage, and I don't detect any burnt smells.
While the schematics provided...
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Benq sw2700pt backlight
Looking for help. Need to find this backlight strip, or Need help identifying LED's
They emit blue light. Nice monitor will become Ewaste if i cant identify these LED's [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3211129}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3211130}[/ATTACH]Looking for help. Need to find this backlight strip, or Need help identifying LED's
They emit blue light. Nice monitor will become...
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This would be my guess as guidline. for BZ3Y but im not experianced enoght so seeking some advice, or guidance....
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Schwinn airdyne, Help identify Components.
[ATTACH=JSON]{"data-align":"none","data-size":"full","data-tempid":"temp_326605_1707062592428_107"}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"full","data-tempid":"temp_326606_1707062600002_830"}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"full","data-tempid":"temp_326607_1707062605739_65"}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"full","data-tempid":"temp_326608_1707062606670_302"}[/ATTACH]...
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Technics SU-V470 Power on, but no Current drive Light
Hello, I'm tinkering with this amplifier. The 'Current Drive' light doesn't come on, and the relay doesn't power on either.
I've identified a possible issue—I think—where Pins 3, 6, 12, 13, 15, and 16 have a positive voltage of 22V. However, Pin 18 shows 0 voltage, and Pin 17 registers -1V.
I'm considering replacing the SVI 3205 IC, but it costs 50 pounds. Therefore, I want to make sure it's actually dead before purchasing a replacement.
Any suggestions would be greatly appreciated.
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So final update.
Tested on reasonable system with good speakers, all is good and work.
thanks again everyone.
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Re: Dual CV-1260 amplifier Component replacement.
I'm taking this amplifier to a friend of mine who has all kinds of old school equipment for proper testing. Will see if it performs well....
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Re: Dual CV-1260 amplifier Component replacement.
Im not sure, why tuner input playing low on one channel, But maybe it can't understand my phone.
My phone was playing music thro 3.5mm jack and it was split into two old type audio connectors.
CD/AUX on the other hand works fine.
Phono/Turntable also was overamplifying and distorting my phone's music....
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Re: Dual CV-1260 amplifier Component replacement.
I tested them when I was troubleshooting -48v issue.
I posted here when I found nothing wrong to begin with.
Now all is back as it should but Output is low in one channel. That me having a brain Fart. Used tuner input with AUX connector from my phone.
Swiched to DC/AUX channel and its back to normal. Ajusted to zero on test points and both channels playing nice and smoth.
So ultimately, no idea why fuse blown, and no idea why doubble diode was showing 0.6 and gone back...Last edited by Benass; 11-12-2023, 02:32 PM.
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Re: Dual CV-1260 amplifier Component replacement.
[COLOR="Black"][/COLOR]
I replaced the fuse. And now voltages gone back to nearly zero.
Tested with speakers(carefully) and this faulty channel playing but very quietly,
I ramped up volume half way to to hear it.
So tomorrow I will have to figure out why its so quiet.
Also, I have removed main transistors and used component testers to validate them.Re: Dual CV-1260 amplifier Component replacement.
[COLOR="Black"][/COLOR]
I replaced...
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Re: Dual CV-1260 amplifier Component replacement.
Hello. Sorry i was away for few days. I will take all suggestions on board and update accordingly.
Thank you.
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Re: Dual CV-1260 amplifier Component replacement.
Weirdly diode measured correct once removed, put it back in and it's measuring correctly to other same diode.
Any ideas why I have -48v on F1 fuse? I can't find anything obvious and not smart enough to understand it.
Any tips would be appreciated.
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Re: Dual CV-1260 amplifier Component replacement.
I have Obtained some information in this website with similar problem.
[url]https://audiokarma.org/forums/index.php?threads/odd-luxman-part.369068/[/url]
Im getting some diodes delivered in few days, will perform some testing and update accordingly.Re: Dual CV-1260 amplifier Component...d in few days,
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Dual CV-1260 amplifier Component replacement.
Hello,
I am currently working on the Dual CV-1260 amplifier. Unfortunately, one channel has stopped working. After conducting some troubleshooting, I discovered that D34 is exhibiting an incorrect voltage drop, as opposed to D31, D32, and D33, which have a 1.2V drop. D34, on the other hand, has a 0.6V drop. This leads me to believe that one diode may be open.
F1 (the fuse) is showing 0.1V, and the channel is working fine. However, F2 (the fuse) is blown and reads -48V.
In summary, Line 39 has nearly zero voltage and is working normally, while Line 40...
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Re: Looking for Suitable Relay Replacement.
Sorry was afk for a while.
This is an Industrial Washing machine board. I got a request thro whatsapp to look into possible replacement of all relays(9 in total)
It comes with an error Relay related on the screen.
I was looking for alternatives and T90 does come as one. I will have to look at it
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TestIFire 1000 IR Sensor Clean Cup Error
Hello,
I have a TestiFire 1000 Device with an IR sensor fault. The problem was that the IR sensor had no power.
Initially, I found that R47 had 5V, but it was OL (open loop). I replaced it with another 100 Ohm resistor, and 5V was restored to the IR sensor.
The second problem I found was that R50 (I think) was 4700, but it was also OL. I replaced it with another 470 Ohm resistor.
Despite these fixes, the device was still giving me an IR sensor error. At this point, I was about to give up, until the owner advised me to attach the CUP to...
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Looking for Suitable Relay Replacement.
Hello. I have Industrial Washing Machine PCB.
Customer Requested Relays Replacement.
I can't find WJ115F1 relays to buy. Looking for some help to identify possible alternative solutions.
Or any tips, on how to approach this situation....
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