Marantz Remote Control No Power/No Display Repaired
I received some Marantz Remote Control from one of the clients. The complaints were no power/ no display. This complaint is very common on this device. But this remote is not like a normal remote control. This is a programmable remote control you can use it especially for your TV, DVD Player, Satellite Receiver, Amplifier, VHS Player and also Lighting Control and AC( Air Conditioning) in short for Home Automation use. Here is the picture:
These remote controls could develop some other problems too for example not responding when touching on the screen (touch screen) and “hang” while using it. It needs firmware update in order to solve these kinds of problems.
Read the article below how I have solved the no power/no display problem.
First thing I do was to remove the two screws as seen from the picture below:
Then open from the bottom as seen from the above photo. Finally I saw the main board inside but there was no sign of damage parts.
Next I removed the ribbon cable for the touch screen and connect again the battery to check if the problem is from the touch screen. If the touch screen is the cause of the problem once the ribbon cable is disconnected there will be power once it is turned On. But still there was no power. So I had to remove all the internal parts and left only the mainboard to troubleshoot.
The first thing I did on the mainboard is to check on the components that are related to the base docking station from the charger. I checked on the big components first which were the SMD Tantalum capacitors and found three of them to be defective.
The one with the 220uf 10 volt I replaced it with 470uf 16 volt. The two capacitors 100uf/16 volt I replaced with 330uf 35 volt. I have used the replacement because I do not have the SMD Tantalum capacitors and the good thing is both replacement although is bigger in size the remote control cover would still be able to close. It was a test using the normal type of electrolytic capacitors but found it to be working good.
And after I have replaced the capacitors see what happen.
There was display and also charging perfectly on the docking station.
Note: In order to update the firmware one has to install the latest software installer to calibrate the touch screen.
This article is contributed by Fernando Frias from Abu Dhabi UAE. He is currently working in a Technologies company as a technician.
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You may check out his previous repair article below:
https://www.jestineyong.com/samsung-lcd-tv-repair/
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moshe
November 10, 2014 at 10:35 pm
nice article fernando...
what made you decide to check the caps?
and what did you use to check them?
Kigoma Charles
November 19, 2014 at 7:29 pm
Thanks mr Fernando
Good job wel done but iam not clear about how you came to know that the
tantanum caps were the problem? Otherwise i and the world as well appreciates
your education to the nation.
God bless u.
Jim
November 11, 2014 at 12:08 am
Wow! who would of thought that those flat pack type caps were the bad components,nice going and were all the other units the same problem?
Cuong Chung
November 11, 2014 at 2:35 am
Hello,
I would like to known, how do you test for the bad capacitors in the circuits board.
Thank you,
Cuong
Corriete
November 11, 2014 at 4:56 am
great job sir but why use different capacitance? would that increase not have a difference in function ? we i see it worked but just asking. curiosity. thanks
Mahin
November 11, 2014 at 5:09 am
Capacitors uf n volts don't match , then how did u do this?
Very curious to know
Fernando Frias
November 11, 2014 at 2:02 pm
Mahin,you can use capacitor higher than the original one if you don't have the same
value specially the volts that's why instead of 10v i am using 16v and for 16v iam using 35v because that 35v it will receive Voltages from the Charger.
Car
November 11, 2014 at 5:25 am
Good report!
Tantalum capacitors often give problems ....
Thank You for sharing!
Fernando Frias
November 11, 2014 at 2:22 pm
Your welcome Car!but in electronics you cannot says 100% the parts working!is guarantee in lifetime.
Andre Gopee
November 11, 2014 at 5:59 am
Hi Fernando, nice job...I notice you said the three cap were bad and I only saw two normal cap you replace. Can you explain? Also How do you know those were tantalum Caps? they look like diodes to me (just asking.
Fernando Frias
November 11, 2014 at 2:08 pm
Andre Gopee,Thanks for the comment its very clear on the picture the parts there is farad and volts and the diode is really different of them if you are familiar of SMD parts you can notice what is the different thanks!
John Hopf
November 11, 2014 at 10:29 am
This is VERY cool ! Using regular caps in there 🙂 I am in Rhode Island, USA and I love this stuff !
Tito
November 11, 2014 at 12:26 pm
Good job Fernando,but i am also failing to understand the way you changed those capacitors. I would wish if you answer Andre Gopee
zed
November 11, 2014 at 12:29 pm
you said fernando you repalced two 100uf 16v with one electrolytic capacitor with the value of 330uf 35volts is that ryt just need clarification? thanks
zed
November 11, 2014 at 12:39 pm
are the two capacitors 100uf 16v are in parallel thats why you put only 1 elec cap 330 uf 35v or are they in series?
Fernando Frias
November 11, 2014 at 2:12 pm
Zed,Thanks for question!But you are right those capacitors are in series thats why i'll put one capacitor 330uf/35v
God Bless You!
biruk aweke
November 11, 2014 at 12:41 pm
HI Fernando it is very interesting thanks for sharing.
Fernando Frias
November 11, 2014 at 2:15 pm
Biruk Awake you are welcome!
Enjoy of your repair too.... . ..
seanmcquillan
November 11, 2014 at 6:45 pm
thanks a lot for the info had a great time reding the tips always useful i am a lifetime 55 years a radio and tv engineer here in ireland and love gen of all kinds always learning esp the new misro tech stuff a long way from the old pentode valvess and big caps cheers and a million thanks sean
Humberto
November 11, 2014 at 8:57 pm
Good repair Fernando, congratulations.
James
November 12, 2014 at 6:29 am
My question is how do you know or test these caps. are bad on PCB? Guessing? It is very important for bench repair technician. Thanks!
James
Abdul
November 12, 2014 at 8:52 am
Thank you Fernando.
I like the way you do in step by step.
But I am wondering how you test the capacitors in circuit.
Congratulations.
Hope to hear more articles from you.
Abdul (Singapore)
Robert
November 12, 2014 at 10:47 am
Good job getting the device fixed Fernando. But why not replace the caps with the same smd caps? I think that would be a more reliable repair.
beh
November 12, 2014 at 3:29 pm
FRIAS: thanks for this report. but what was the problems of these two caps:
1- they were shorted? and/or
2- they were opened? and/or
3- their ESR were higher? and /or
4- the value of caps were changed? and not in tolerance?and/or
5- all the above?!
Tony
November 12, 2014 at 3:52 pm
Wow! That not a bad idea to change from SMD tantalum capacitors to normal type of electrolytic capacitors.Can you imagine what would like if you don't have any of these SMD caps available in stock at the company that you work for and the customer want the remote control ASAP or your boss want that ship out right away,what choice do you have?Not only that,you are so lucky that you can be able to close the cover over the other half of the remote control. You know what Fernando,I have been in the same situation like you trying to get the substitute component when the right component is not available.Well done,Fernando!
beh
November 12, 2014 at 6:14 pm
... also why you did not suspect to other big ic s and crystal that you showed in the photo .. but directly you changed these two poor TANTALIUM CAPS ...?TANTALIUM caps rarely get defected ?
Robert
November 13, 2014 at 1:38 am
That's true Beh - SMD tantalum caps are extremely reliable. I would imagine that someone connected the charger backwards or something to blow the tantalum caps.
Joshua Oloo
November 12, 2014 at 8:28 pm
Good job Mr.Fernando,keep it up sir.how did you test SMD caps on the PCB? Thanks.
Gary
November 13, 2014 at 5:36 pm
Good fault finding . Liked the idea of disconnecting additional kit . to find if a difference . Then check of docking station charger . then tracing back to the capacitors . I wasn't aware those were capacitors . looked like larger SMD resistors though with white print . info being ( 100 - 16 ) being 100uF at 16volts . didn't know that not seen this type of component before . Anyway . good servicing . Those remotes can now be put use and not wasted .
Fantastic !
Asim
November 13, 2014 at 10:47 pm
Nice Work
Bill
November 23, 2014 at 6:08 am
He replied many times when people say how good he is but dozen times it was asked what made him test the capacitors, what was their condition, how were they tested, but not one reply on this. I think that someone else did the repair and he is just grandstanding. Psychologists say this is usual behavior when a person has low self esteem or low confidence.
Tshering Tobgay
December 30, 2014 at 6:54 pm
Thanks,
its helping us very much,
sadasivam
July 5, 2016 at 10:03 pm
Hi
I have A Dell TFT Monitor Model 2001FP All is working Fine With the monitor menu buttons/brightness and etc the Issue with my Monitor is It does not powers off
i tried changing the power buttons i dissconnected the switch but this does got gives me a good result
Can you solve my issue this kind of problem is new to me
John south Africa
October 8, 2016 at 6:47 pm
Help on hisense led backlight TV model: ledn32d33
Problem doesn't power on please or send me tips