Re: Onkyo TX-NR609 Sound only on USB/Internet Radio/DLNA Input
Thank you for your suggestions.
I first tried replacing the PCM9211 and the issue persists.
When I have the time I will disassemble the unit and do some measurements - trace the analog signal to see where exactly the issue is.
I'm reluctant to replace the D830 because it doesn't exhibit any issues others with faulty D830 / firmware are having. I have already updated firmware via USB, the update process went smoothly but the original issue remains....
Sushi1808
Member
Last Activity: 03-07-2024, 03:19 AM
Joined: 06-04-2014
Location: Ljubljana
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Re: Onkyo TX-NR609 Sound only on USB/Internet Radio/DLNA Input
Hi, I have removed the chip, reballed it with 60/40 solder balls and re-attached it, I'm not a heatgun cowboy
The baffling thing is that internet radio and .mp3s from USB flash drive play without any issues at all, I have no network connectivity issues...it works very reliably except for the audio from analog/HDMI sources.
A guy from another forum said he has encountered exact same issues many times before and it was always the PCM9211 that needed to be replaced....Leave a comment:
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Onkyo TX-NR609 Sound only on USB/Internet Radio/DLNA Input
Hi everyone!
I turn to you in hope someone could point me in the right direction since I lack knowledge and experience in diagnosis of audio equipment. (My experience is in computer chip level repairs.)
I bought an Onkyo TX-NR609 receiver which initially produced no sound on speakers/headphones, there was no delayed relay click, speaker matrix icon didn't show up, USB/NET stuck in "Now initializing", instead of DSP/1st NET firmware version there were ?????????...
There was flux residue around the D830K013BZKB4 DSP chip (Q3001) on the HDMI... -
Re: LA-C421P BQ24780S no ACDRV
Schematics diagram for Lenovo ThinkPad L560 - AILL1/L2 LA-C421P REV1.0 is now available, hope someone finds it useful....Leave a comment:
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Re: LA-C421P BQ24780S no ACDRV
Schematics diagram for Lenovo ThinkPad L560 - AILL1/L2 LA-C421P REV1.0 is now available, hope someone finds it useful.
[url]https://www.badcaps.net/forum/showthread.php?p=1228941#post1228941[/url]Re: LA-C421P BQ24780S no ACDRV<br />...t1228941[/url]Last edited by piernov; 04-11-2023, 11:23 AM.Leave a comment:
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Re: Cleaning newer INTEL motherboards in Ultrasonic cleaner
Dear alindumitru46 I have no real experience with cleaning the oxidized elements in ultrasonic cleaner...maybe someone else here on forum could be of more help.
But in my opinion, ultrasonic cleaner is not a magical device...it can't achieve something you wouldn't be able to achieve with a toothbrush, a proper solvent and a bit of manual scrubbing action.
In your case I would try to remove oxidation with the help of a electrical contact cleaner solution and scrubbing with a toothbrush or similar....Leave a comment:
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Re: Cleaning newer INTEL motherboards in Ultrasonic cleaner
stj thank you for your reply.
I would use IPA, it is a lot cheaper than Electrolube SWAS, but I cannot since IPA is very flammable and fire safety is a concern. Although, they sell special ultrasonic cleaners, designed for use with flammable liquids.
I only use IPA when cleaning smaller components, I put it in a 1dcl glass beaker together with the component. It performs well.
I read somewhere, IPA can be used in a waterproof bag which can be then submerged in the non-flammable ultrasonic...Leave a comment:
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Cleaning newer INTEL motherboards in Ultrasonic cleaner
Dear expert community,
I have read somewhere (forgot the source), that cleaning newer Intel motherboards in Ultrasonic cleaner can sometime cause damage to some components, particularly the PCH.
What are your experiences regarding this matter?
I clean all motherboards in Ultrasonic cleaner after BGA rework, since no clean flux residue could develop shorts under BGA after some time. I am talking about fake Amtech 559 flux, bought on ebay. For last few months I only use original Amtech flux from official Amtech distributors.
I clean all... -
Re: Toshiba Satellite C855 Hannstar-e89382 Component identification
UPDATE #2:
I have replaced the two missing filter inductors near the HDMI port, with WCM-2012-900T from Toshiba L450D scrap board, and HDMI is now working without a problem.Leave a comment:
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Re: Rework of laptop motherboards
1. YES, absolutely, you don't know the environment and humidity to which these motherboards were exposed, prior to getting to your workshop.
2. I personally use 110C for around 4-5 hours and never have any popcorning or similar issues. I also prebake all new chips at 110C for around 4-5 hours. I wouldn't recommend any higher temperatures because of the sensitivity of some of the components. They can withstand much higher temperatures but only for a few minutes.
3. I also use classic kitchen oven and prebake around 4 boards at once,...Last edited by Sushi1808; 03-11-2016, 05:50 AM.Leave a comment:
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Re: Toshiba Satellite C855 Hannstar-e89382 Component identification
UPDATE:
I have made other measurements on this board (especially LVDS signals on LCD connector, all over 1V) and it seemed everything was in order, but it didn't output video via VGA. I did some research and found out the LCD for this motherboard is the same as the LCD in HP Compaq 615, I have at my disposal. I took LCD connector from Toshiba and connected it to HP Compaq 615 screen, started the motherboard and the thing showed video on the monitor.
Later I discovered in BIOS video output...Leave a comment:
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Re: Toshiba Satellite C855 Hannstar-e89382 Component identification
tata123 thank you for your reply.
If I don't use HDMI I don't need to replace those filters, motherboard should show picture through the VGA port anyway, is that correct?Leave a comment:
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Re: Toshiba Satellite C855 Hannstar-e89382 Component identification
Please report your findings if you manage to bring some of them back to life.
Thank you.Leave a comment:
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Re: Toshiba Satellite C855 Hannstar-e89382 Component identification
Dear passete thank you for your reply,
I can't try internal LCD because it is damaged and HDMI is missing two elements in it's circuit.
Have you tried replacing the PCH for a new one, not just reballing it?
Yeah it is a pain to diagnose, since it doesn't even start without CPU attached, so I can't measure the PWRGOOD and CPURST signals on it...and elements have no markings on them...Leave a comment:
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Re: Toshiba Satellite C855 Hannstar-e89382 Component identification
I believe I have found the component number 1 by searching all the Toshiba schematics at my disposal for the 6 pin IC connected to VGA connector by DDCDAT 1 and DDCCLK_1.
I have found it in schematics for Toshiba C660, picture is attached to this post, the component code is 2N7002DWT/R7 it is a DUAL N-CHANNEL ENHANCEMENT MODE MOSFET. I have also included the datasheet for this mosfet.
Measurements (Corrected):
None of the six pads is connected to GND
PIN #1 3.35V
PIN #2...Leave a comment:
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Re: Toshiba Satellite C855 Hannstar-e89382 Component identification
Dear kotnatan thank you for your reply,
I have attached picture of the code from the motherboard.
It says PLF / PLR / CSF / CSR UMA MB REV 2.1 and there is also a code E89382...Leave a comment:
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Toshiba Satellite C855 Hannstar-e89382 Component identification
Dear expert community,
I need your help with identifying some components on a Toshiba Satellite C855 Hannstar-e89382 motherboard, since there are no element markings on this board. The schematics are included.
I don't know the history of this laptop, but by the looks of it, I would say it was run over by a train (cracked LCD, bent LCD hinges, bent keyboard, broken plastic casing, liquid damaged keyboard,...)
Since the LCD is broken, I would like to test this board with external LCD monitor via VGA or HDMI port, but as lucky as I am, this board is missing... -
Re: Prestigio P3221W 22', power supply problem
Yes I know, I certainly can't sell this monitor as the condition will likely reappear. But now I don't know what to do as the monitor is working flawlessly and the 5V voltage is perfect, I reckon all the measurements would be correct as the output voltages are. Is it possible the 19V was there because no load was on 12V line? I resoldered the power plug connector as it was jerky but other than that everything looks ok, I tried to cool down the board with cold air and shake it in attempt to recreate the fault but the thing doesn't want...Leave a comment:
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Re: Prestigio P3221W 22', power supply problem
I tried changing the dummy load from a 12V 21W car light bulb to a 12V 1.32W PC Fan and measure the 5V line.
It was steady 5.01V (with previous load it was 4.60V) and the 12V line was around 20V.
I took my chances and connected the power supply board to main board. I got healthy 5.10V on 5V line and 19V on 12V line.
The LCD is working again.
I think the definitive moment of this "repair" was when I connected the 12V 21W car light bulb as a load on 5V line and after I re-plugged to mains,...Leave a comment:
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Re: Prestigio P3221W 22', power supply problem
I now replaced all the output caps, they all have ESR 0.0, previous caps had around 0.20ohm max, the results are the same, so I made some measurements you requested.
Measurements:
C204 22uF 64V (without dummy load): fluctuating 11 - 14.9V
C204 22uF 64V (with dummy load - 21W car light bulb on 5V line): steady 13.34V
IC203 - TL431 (with dummy load):
Leg 1 - Ref: 2.49V
Leg 2 - Anode: 0V
Leg 3 - Cathode: 2.51V
IC202 - Optocoupler K1010 817 (tested in circuit with...Leave a comment:
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