I am trying to troubleshoot a power issue on this board. I did find a burned 0R resistor. I removed the burnt jumper resistor and replaced with a solder ball. Symptoms are CPU and GPU get hot with power off and adapter in.
R2614
1 +3VA_DSW
2 +3VDSW_VCCPDSW
I am starting to test the rails in the repair guide.
+3VA_RTC = 3.054V
RTC_RST# = 3.052V
[COLOR="Red"]+3VA_EC = 3.296V[/COLOR]?
EC_RST# = 3.285V
3VADSW_ON = 3.363V
+3VA_DSW = 3.352V
+5VSUS = 5.089V
DPWROK_EC = 3.287V (INTERMITTENT...
ngen33r
Member
Last Activity: 01-12-2022, 09:26 PM
Joined: 09-17-2016
Location: Cleveland, OH
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Re: Denon 4308CI NO AUDIO
Mains were blown. I also found a bad diode.
[url]https://www.digikey.com/product-detail/en/sanken/STD03P/STD03P-ND/3661836[/url]Re: Denon 4308CI NO AUDIO<br /> <br.../3661836[/url] -
Re: Denon 4308CI NO AUDIO
Trace Repaired:...Leave a comment:
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Re: Denon 4308CI NO AUDIO
Must have been a big boom....Leave a comment:
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Re: Denon 4308CI NO AUDIO
More problems found:
B - 34V
C - 10V
E - 61V
I unplugged CW155 & CW068
B - 100mV
C - -3.88V
E - 475mV
More checking shows both transistors (TR630 TR631) on the 5V supply are shorted and I have a blown audio output. IC301 is also fried. My guess is the blown output is the cause. I am not sure that I can find a replacement for the outputs. IC301 might also be impossible to source. I am not sure if I trust eBay parts but that may be my only option. I have the service manual but it is too large...Last edited by ngen33r; 08-29-2018, 08:32 PM.Leave a comment:
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Re: Denon 4308CI NO AUDIO
C507 was blistered and leaking, could be an un-related problem. I checked the voltage rails and everything seems to be good there.
I will test the things you listed tomorrow.Leave a comment:
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Re: Denon 4308CI NO AUDIO
Any ideas on this one because these look like the muting circuits they shouldn't have excessive current flowing through them.Leave a comment:
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Re: Denon 4308CI NO AUDIO
I recapped that section of the board and replaced the PNP with
The transistor blew again when powered on so another problem exists.Leave a comment:
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Re: ASUS UX32VD No Video
Thank You for this. This led me to find a short in the display cable. I will need to replace that first and test as I get no post video through the HDMI....Leave a comment:
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Re: Denon 4308CI NO AUDIO
They recommended these:
[url]https://www.digikey.com/product-detail/en/diodes-incorporated/ZTX795A/ZTX795A-ND/92573[/url]
Parts ordered let's see what happens. I am replacing all of the caps in that section as one of them ruptured, which most likely killed the transistor with noise the other parts seem to test ok.Re: Denon 4308CI NO AUDIO<br /> <br...ered let's seeLeave a comment:
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Re: Denon 4308CI NO AUDIO
Never thought to do that. Thank You...Leave a comment:
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Re: Denon 4308CI NO AUDIO
I cannot find an exact match at digikey or mouser.
I can go 1/2 the rated voltage
or
Higher voltage and less gain
Or I can try my chances on eBay transistors which are probably fake.Leave a comment:
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Denon 4308CI NO AUDIO
I picked up a Denon 4308CI cheap and the unit powers on fine but I have no audio output. I tore the unit down and found on the audio unit board a bad cap and a blown transistor. C507 100uF 50V and TR501 KTA1268. The KTA1268 is not available so I need to find something equivalent.
[url]https://cdn.badcaps-static.com/pdfs/433d111029175255e9ea57fffd426395.pdf[/url]
This one is close but not exact.
Any recomendations?https://I picked up a Denon 4308CI c...d on the audio...Last edited by ngen33r; 08-12-2018, 09:28 PM. -
Re: ASUS UX32VD No Video
I tested both bios files and still no post. I tested more and I find that the board has 2 shorts to GND
P_VCORE_VIN_S - TEST OK
P_VCORE_LX_30 - SHORT (MAYBE PQ8002 PQ8003)
P_GFX_VIN_S - TEST OK
P_GFX_LX_30 - SHORT (MAYBE PQ8005 PQ8006)
Both also connect to PU8000
PU8000 should be checked first.Leave a comment:
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Re: ASUS UX32VD No Video
How to tell difference between UX32VDF and UX32VDAF Board is 60-NPOMB1F00-B11Leave a comment:
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Re: ASUS UX32VD No Video
Link to a guide for bios recovery?Leave a comment:
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ASUS UX32VD No Video
I have another UX32VD that I am working on. This board powers on but I get no video with the LCD or HDMI. Any ideas where to start looking? I know it could be the CPU or GPU but how would I confirm that with them being soldered on. -
Re: UX32VD 2.1 No Power *Have BoardView*
I am going to use this space to document what I have and have not checked. I am currently using 3V current limited to 200mA and using alcohol evap to identify the bad part. I may need to bump up the current but for now I will start low.
Well after testing I found that U2001 is the problem. I do not have BGA equipment so I think this duck is dead.
Part alone is $56
[url]https://www.mouser.com/ProductDetail/Intel/BD82HM76-S-LJ8E?qs=jBH3i1P1BdsKwiGmdnzX%2Fw%3D%3D[/url]
Unless someone knows a reputable...Last edited by ngen33r; 04-13-2018, 02:58 PM.Leave a comment:
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Re: Last ditch effort to Apple GPU problem for old Macbook Pro...
There is a guy on eBay that does does excellent reball work for $75. macbooklaptoprepair is his userid i think. He has done a few for me and all are still working with leaded balls. Might not be worth the price but if you need a permanent fix and aren't in a rush might we worth looking into.Leave a comment:
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Re: Identify damaged smd at Asus UX303LN.
Can you take a picture zoom outLeave a comment:
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