Mitsubishi VS-45609


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Mitsubishi VS-45609

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psalz
New User

Jul 26, 2007, 9:34 PM

Post #1 of 14 (3358 views)
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Mitsubishi VS-45609	Can't Post

Hello,
New to forum. Hoping for some direction. Have tv as listed. Picture is snowy as if no reception on all channels. VCR does not input to TV. Front input jacks and S-video work. Checked cabling with known good cables.Checked cable jack as well. All OK. TV had been working flawlessly previous.
Any help will be greatly appreciated.
Thank you in advance
Pat

mikemaiertv
Enthusiast

Jul 31, 2007, 7:25 PM

Post #2 of 14 (3344 views)
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Re: [psalz] Mitsubishi VS-45609 [In reply to]	Can't Post

Normaly we dont give the secret codes out over the internet, people tend to change crap around in the service menus and screw sets up real bad. But it sound like your set needs a kick in the brain so here goes,,, with the original Mits remote hit the "menu" button followed fast with 0-1-7-0 this will bring up a screen where the first option already highlighted is "Initsulize" if highlighted hit enter on the remote. this may or may not fix the set
Mike Owens Owner Competition TV Spokane WA.

psalz
New User

Aug 2, 2007, 12:54 PM

Post #3 of 14 (3321 views)
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Re: [mikemaiertv] Mitsubishi VS-45609 [In reply to]	Can't Post

Thanks Mike.
Gave it a whirl last evening. No changes. Acts like cable is disconnected. I did verify cable and cable jack with known good cable an TV. If there's anything else I could try, I'd appreciate it. My email is psalsano@msn.com.
Thanks again,
Pat

onetech
User

Aug 2, 2007, 5:49 PM

Post #4 of 14 (3311 views)
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Re: [psalz] Mitsubishi VS-45609 [In reply to]	Can't Post

Pat,
It sounds like you've lost the 32v to the tuners. This would be a power supply problem.

psalz
New User

Aug 3, 2007, 10:02 PM

Post #5 of 14 (3298 views)
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Re: [onetech] Mitsubishi VS-45609 [In reply to]	Can't Post

Is there a test point where this can be measured?
Thanks

onetech
User

Aug 6, 2007, 3:38 PM

Post #6 of 14 (3282 views)
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Re: [psalz] Mitsubishi VS-45609 [In reply to]	Can't Post

You can check pin #1 of connector "KB" which is the 32v output from the power supply or check at pin BTL on the tuners themselves, this chassis has two tuners.

psalz
New User

Aug 6, 2007, 6:44 PM

Post #7 of 14 (3275 views)
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Re: [onetech] Mitsubishi VS-45609 [In reply to]	Can't Post

Thanks,
I will check this evening.
Thanks
Pat

psalz
New User

Oct 9, 2007, 6:18 PM

Post #8 of 14 (3137 views)
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Re: [psalz] Mitsubishi VS-45609 [In reply to]	Can't Post

OK. It's been a while since I last responded. Finally had some time to look further. I found visually blown diode D746 on signal board. Does anyone have spec for replacement component? How about replacement/refurbished boards? Last question, has anyone come across this before?
Thanks to all,
Pat

onetech
User

Oct 10, 2007, 3:16 PM

Post #9 of 14 (3132 views)
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Re: [psalz] Mitsubishi VS-45609 [In reply to]	Can't Post

Pat,
D746 is a 5.6 volt .5 watt zener diode. Should be available at most electronics supply houses or try Radio Shack. Did you check the 32 volts at the tuners?

(This post was edited by onetech on Oct 10, 2007, 3:18 PM)

psalz
New User

Oct 10, 2007, 3:28 PM

Post #10 of 14 (3126 views)
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Re: [onetech] Mitsubishi VS-45609 [In reply to]	Can't Post

Onetech,
Thanks for the diode info. I have not checked yet. Can I check with signal board removed at KB connector? Or will that do possible further damage to power supply.
Thanks again,
Pat

onetech
User

Oct 10, 2007, 10:13 PM

Post #11 of 14 (3118 views)
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Re: [psalz] Mitsubishi VS-45609 [In reply to]	Can't Post

I'm not sure if the power supply will startup with the signal board disconnected. Better have it connected as this would give you an accurate reading of the voltages.

psalz
New User

Oct 16, 2007, 1:25 PM

Post #12 of 14 (3096 views)
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Re: [onetech] Mitsubishi VS-45609 [In reply to]	Can't Post

One tech,
Having some trouble locating diode. Would you know the current rating?
Thanks,
psalz

onetech
User

Oct 16, 2007, 4:00 PM

Post #13 of 14 (3091 views)
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Re: [psalz] Mitsubishi VS-45609 [In reply to]	Can't Post

psalz,
Zener diodes are rated by voltage and power.
The diode in question is rated @ 5.6 volts .5 watts ( this would be .09 amp.)
The generic number for the diode is 1N4734A
an NTE/ECG #136A
The Mitsubishi part number is 264P461050 (this is a replacement for the original 264P484040)
This is available from Digikey on the web for about $6.00 with shipping (the actual part is less than a dollar)
Also check the 32v to the tuners.
Hope this helps.

psalz
New User

Oct 17, 2007, 12:11 AM

Post #14 of 14 (3085 views)
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Re: [onetech] Mitsubishi VS-45609 [In reply to]	Can't Post

Onetech,
Big help. Was on digikey site earlier today. I'll be in touch.
Much thanks,
Pat

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