Question about Mitsubishi WT-46805 46" Rear Projection Television

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Vertical hold not working

For a while my TV was having a power up issue, when the TV would begin to power on it would automatically turn off again?? After unplugging and plugging back in it would tend to work for a while. For now the TV will power on fine but the vertical hold will not, I guess you would say "hold the picture" in place? The vertical hold switch seems to be of no help in adjusting or "holding" the picture in place.
Also would you might know where to get repair manuals for this TV.
Thanks in advance for any assistance or advice you can give :)

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Re: Vertical hold not working

On mitsubishi just replace the caps that are near the vertical ic this will fix the problem good luck

Posted on Nov 04, 2007

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The sync is automatic. There are no knobs to turn. If the picture is rolling, look first to the source connection and make sure your tv has a solid vertical sync connection. If you are using the RF input then the issue could be within your small signal board also known as the SSB. Good luck.

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Sounds like the CRTs are going into protective blanking due to the vertical output ic needing to be resolderd. Try resoldering the vertical IC that may possibly fix the issue.

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Hello carriegomez,

I gave this advice to someone with this same problem so here it is again:

It sounds like your shutdown circuit is being activated. This is due to excess current being drawn. This usually happens in the High Voltage section of the TV or one of the deflection stages. Due to the nature of this problem I would suggest that you take it to a local TV repair shop or have a TV repair person come out and take a look at the issue. The HV section is dangerous and should be dealt with by a qualified TV repair technician.

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My JVC AV-48WP30 picture is distorted vertically to about half the screen height. If I turn the tv on and off a few times, sometimes it will correct itself, until I turn it off again.

Try resoldering the vertical output IC that should correct the issue repeated off and on cycles often tend to bridge the solder connection causeing the set to work untill power is cut off.

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This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the device and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source)

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