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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: