MITSUBISHI HS-U70 video input not working
 

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

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.

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.

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

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.

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.

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?

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.

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.

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. :yes:

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.

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.
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"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.

Oh, yes, you're completely right. It's been five years since I owned my last Mitsubishi, which was a HS-423UR S-VHS. I still have the manual for it though, but it's at my storage.

I see Mitsubishi's at the thrift all the time. Never pick them up. I got burned by them near the end of my repair shop years. Lots of bad capacitors, and that yellow glue. Hmmph.

Yes, it's amazing to see how many Mitsubishi VCRs survive in thrift stores today, despite they have acted as being more troublesome than most other brands. It's possible that the ones survive today have NEVER needed a single repair since new, and the only assumption we can know is that they donated them as still working and functional.

Consumer Reports did a survey on VCR reliability at one time, and, surprisingly, the percentage ratio of working Mitsubishi vs. broken Mitsubishi was much higher than most other VCR brands. Mitsubishi had always been rated more-reliable than Sharp, Hitachi, NEC, and Fisher (in-order) during the 1980s, as well as JVC, Sanyo, and Emerson (Orion) in some years. Only Panasonic (along with Quasar, Magnavox, GE, and Sylvania), Toshiba, and Symphonic (along with Funai and Shintom) guaranteed higher-reliability scores than Mitsubishi in all years of production.

Mitsubishi claimed and pretended like they were the 4th most-reliable VCR manufacturer at one time. It's EXTREMELY difficult to predict by most technicians and me if this was actually true. It may be right, OR it may be wrong. :saywhat:

Overall, Mitsubishi was rated as the seventh (#7) most-reliable VHS VCR brand:

http://www.videokarma.org/showthread.php?t=254206

And the sixth (#6) most-reliable Japanese video electronic manufacturer by fame and quality reputation traditionally:

http://www.videokarma.org/showpost.p...7&postcount=10

While difficult to predict, not everyone had that bad capacitor problems, actually, due to Mitsubishi buying capacitors from 5 different suppliers at the same time. You either got all Elna caps (which leaked) or Matsushita caps (that won't die). Some units got very little to few yellow glue, or tons of yellow glue all over, depending on how much glue a factory worker felt like putting. So, reliability varies largely between each unit and owner.

If for some reason someone luckily got one of the Mitsubishi VCRs with all Matsushita caps inside that are all defect-free, plus no yellow glue on the board (accidentally forgotten by the worker), I think I will easily agree that it's going to be more-reliable than Sharp, Hitachi, NEC, and Fisher, exactly listed in order by Consumer Reports. I found Mitsubishi's own chassis mechanism to be solidly well-made, smooth, robust, and sturdy, despite the idler-tire problem.
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Mitsubishi did their best with the 1989 VCR models with the HS-U#0 series:

HS-U20 (4-head)
HS-U30 (4-head)
HS-U50 (4-head Hi-Fi)
HS-U70 (4-head Hi-Fi, S-VHS)
HS-U80 (4-head Hi-Fi, S-VHS editing)

See attached photo for reliability comparison between all VCR brands provided by Consumer Reports (1989 median year).

Notice that Fisher was at the BOTTOM of the list. I'll bet I've repaired 100 of them.

Notice the top 5 would have been all Matsushita-made for the most part, before Magnavox, GE, Sylvania changed, and Quasar disappeared.

I probably would have rated the Mitsubishis down between RCA and Fisher.