i have this 17inch old monitor which doesnt even light the led. i inspected the circuit, no blown fuses, the caps seem good. i get 11V and 3V from the main rails of the circuit. is this normal?
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Re: Asus MM17D no power
If this is on the power board, 11V and 3V are not normal voltages. We tend to see 12V and 5V. 5V usually found on every monitor for standby.Originally posted by senndogg View Post
Most power boards have their input and output rating written right on the pcb.--- begin sig file ---
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Re: Asus MM17D no power
true. thats why i figured this out. there is nothing written but i know that the voltage could be the problem.
i measured: the secondary diodes: ok. fuses:ok. big resistors:ok.
the caps seem good too.
if you want i can post pics.Comment
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Re: Asus MM17D no power
See instructions in post #2 on how to post pictures and size limitations. Please do not post inline or offsite.Originally posted by senndogg View Post--- begin sig file ---
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Re: Asus MM17D no power
This ASUS MM17T might use same similar boards (Are They?)
it has DVI in whereas 17D doesnt.Last edited by selldoor; 01-11-2012, 05:05 AM.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Asus MM17D no power
of course i will.Originally posted by retiredcaps View Post
anyway it is very strange, i just re-measured the voltages, 12,6V and 4,9V. now its confusing me. this voltage is in the logic board too. and 4,9V in the switch board. but the LED doesnt light and there are no signs of life.Comment
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Re: Asus MM17D no power
now i am suspecting it not a a power supply problem. i am gonna show some pics of the logic board.Comment
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Re: Asus MM17D no power
This chap here seems to have fixed one but of course we dont know what the problem was. http://mypaper.pchome.com.tw/88182846/post/1322648181
How is your taiwanese.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Asus MM17D no power
some pics.Attached FilesComment
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Re: Asus MM17D no power
i do well in Mandarin but no good in traditional Han :POriginally posted by selldoor View PostComment
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Re: Asus MM17D no power
I have google translated the captions - doesnt help much but i notice
he has changed the Blue caps on the logic board so that might be somewhere to start.
This is today just repaired LCD, due to bad too! PO to share it out first!
Look at its form according to:
After the failure of black and white picture ─ start!
Posted a good few warranty stickers, I do not know the previous repair a few times?
Internal configuration of photographs:
First those who do not burst! Have all the updates for the capacitor explosion at Japan's! ! Then the back of the solder joints to strengthen!
Unfortunately! Transmission test! Or black and white!
Just on top of the machine's motherboard, you have already seen an explosion convex sesame burn it?
I did not see the previous note ㄋ! Then it is replacing!
I have first measured ground resistance, OK after the power transmission!
Otherwise! Here you are not measuring the voltage! Because if it is not OK! Transmission will immediately be burned!
5V voltage side that has come TCON-side:
Unfortunately! Still black and white!
Up into the TCON! Remember just PI board; AD board has been processed! Again ~! The TCON
CPT for the CPT panel referred to!
Here is the main power supply position TCON:
TCON fuse has been open! In addition to the other, measure the resistance to ground on both sides of chip capacitors are turned! There are short-out parts!
The TCON from the cut section to find a suitable SMD capacitors, and Fuse replacement!
Two-to-ground resistance are ok! Transmission test again!
This time the ok now! There was almost a fool! Because in addition to asus's logo, the other is black and white!
Display to normal! Motherboard then locks back into the side of the motherboard power supply capacitors further updates!
Well! Finally done! pi plate bad! Board also bad! Again tcon also failed! It is a bad lot it!Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Asus MM17D no power
yes. i m going into.Comment
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Re: Asus MM17D no power
Suggest you start by measuring the output of the voltage regulator U202, It's marked AIC 1084-33 and should have an input of 5v and an output of 3.3V. I'm not sure what U201 is, but it wouldn't hurt to also measure it's voltages.Comment
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Re: Asus MM17D no power
U201 is a 1.8V regulator. The part number is AZ1117-1.8E1Originally posted by jetadm123 View Post--- begin sig file ---
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Re: Asus MM17D no power
confirmed, U201 input 4,05V, output 1,77V.
U202 input 4,7V output 3,22V.
i repeat, this monitor doesnt give signs of life.Comment
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Re: Asus MM17D no power
What is the part number of U603?
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Asus MM17D no power
"SPY9". its the transistor between the two freq generators, isnt it?Comment
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Re: Asus MM17D no power
Not exactly. It's between the two crystals, but it's a reset controller. With power applied, what is the voltage on each pin?Originally posted by senndogg View Post
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Asus MM17D no power
Its a MAX810 Datasheet attachedPlease upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Asus MM17D no power
Thanks for confirming it. I drew a blank on that one. Probably too early in the day.Originally posted by selldoor View Post
Senndogg, I've attached the pinout of U603. What is the voltage on the output, using the Gnd pin for the black lead?
PlainBillAttached FilesFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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