MITSUBISHI HS-U70 video input not working

[jmm83]

does anyone know how to get the video input to work?

[Ed in Tx]

Might have to set to S-video or composite RCA input in a menu accessible with the remote. What input are you using? Try the other.

[jmm83]

hi there is a switch that says video or svideo but it did not work it seems like no inputs are working not even the antenna inputs

[waltchan]

Originally Posted by jmm83

hi there is a switch that says video or svideo but it did not work it seems like no inputs are working not even the antenna inputs

You will need to set the VCR to AUX in or video in. There's a slide switch inside the compartment at front underneath the door.

[jmm83]

i tried that its a button that says input it goes to ch3 to ex to antb

[waltchan]

Originally Posted by jmm83

hi there is a switch that says video or svideo but it did not work it seems like no inputs are working not even the antenna inputs

If everything is set up correctly, most likely there are some bad capacitors located at the signal board underneath at the right side of the unit.

Wish I can help you since I used to own a HS-U70 before, but I already stopped supporting Mitsubishi several years ago and already sold them all due to their poor reliability, and Mitsubishi being rated #6 most-reliable manufacturer.

[Ed in Tx]

Originally Posted by waltchan

most likely there are some bad capacitors located at the signal board underneath at the right side of the unit.

Yep. Seen bad caps in Mitsubishis cause no or distorted video that were less than 10 years old at the time. Sometimes they leak and the electrolyte migrates up through the lead holes, and discolors the foil traces on the circuit side of the board and you can actually see the area of the problem.

[jmm83]

Ok i was looking at them but i did not see any bad ones one the tuner board near the power supply if thats the board your talking about if i send pics could you tell me where the board is?

[Ed in Tx]

They are not always visible. This is where an ESR meter comes in handy. With one, you can easily go through a whole board of capacitors and tell which ones are likely bad. When I was working on one with these types of problems, I would test each electrolytic capacitor with my ESR meter, and those that tested with high ESR I would mark with a felt tipped marker as I went through the board, then replace, which usually restored normal operation.

[waltchan]

Originally Posted by jmm83

Ok i was looking at them but i did not see any bad ones one the tuner board near the power supply if thats the board your talking about if i send pics could you tell me where the board is?

The video signal board is located underneath the VCR. Flip it upside down, remove the bottom cover, and you will see a circuit board at the left side with the chassis mechanism at the right. Remove all the screws at the left side, and it reveals out the signal board.

[waltchan]

Originally Posted by Ed in Tx

With one, you can easily go through a whole board of capacitors and tell which ones are likely bad.

Yep, Mitsubishi was really known for that problem. There's also yellow factory-applied glue that could turn brown and become conductive.

I replaced all of my Mitsubishi to Toshiba, and they worked much better.

[jmm83]

ok what caps should i check first i dont have a esr meter but i have one the checks uf rating

[Ed in Tx]

Originally Posted by jmm83

ok what caps should i check first i dont have a esr meter but i have one the checks uf rating

If you plan on owning older electronics this might be time to buy an ESR meter. It will save you countless wasted time.

[waltchan]

Originally Posted by jmm83

does anyone know how to get the video input to work?

There's nothing wrong with the VCR.

The video mute switch must be set to "OFF" mode before you can receive video input. Currently, he has it at "ON" mode, according to the photo he is re-selling it on eBay right now.

Hopefully, this info helps.
.

[Ed in Tx]

"Video Mute" is the blue screen that comes on when video goes away. Turned Off you see will unrecorded tape noise and unused channel noise from the tuner, or a black screen if a video input is selected at the Input Select switch. Inputs should still work with video present.