I can find no adjustments on the circuit boards. One time when I had warranty work done the technician picked up the remote and punched some code into it and up came a screen full of adjustment options. I would like that code to see if the vertical height can be adjusted there. How can I find that code?
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There is no such thing as a "vertical sweep circuit board" in that set. The vertical circuit is part of the sweep module. And BTW that type of symptom is more often a power supply filtering problem anyway.
You may a vertical problem but I think it's not the vertical output amp. The problem should be in the voltages feed the vertical circuit. I have had cocern many times, so try this first: 1. VERTICAL ROLLING, VERTICAL BLANKING BAR LOCKING IN THE MIDDLE OF THE PICTURE, ALSO MAY HAVE HORIZONTAL PULLING OR TEARING. CHECK C2C52 10 UFD @ 50 V OFF THE BASE OF Q2C51 ON THE SIGNAL PCB. 2. CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH ARE ON THE SIGNAL PCB.
Replace these caps no matter how they check.
2. Shuts down; may be intermittent, self-diagnosis ERROR 23 or 24. Check solder connections at connector "DY" on the yokes. Or/and check C411 2200 UFD 35V AND C412 10UFD 50V, both located on the main PCB.
3. Service adjustment codes:
a. Option menu; press MENU 1270
b. Service menu; press MENU 1257.
I would recomend getting the service manual at the following link as if you change the wrong item you can actually harm the set often real bad. The following link will email it to you within minutes of purchase and will offer free tech support to help you with it. heres the link http://servicemanuals.vstore.ca/
The vertical height driver that controls the height of your picture has weakened and needs to be adjusted. If you are somewhat handy you can do this yourself. It requires that you gain access to back of the set & remove the cover. Once removed, locate the vertical height & centering adjustments. Sometimes they are located on the main board & other times are located on the color gun driver circuit board that is plugged into the end of the picture tube.
Respond to this post if you need additional assistance. Good luck!
rule number one about all vs chassis with vertical can pip boards
take them out and throw them away
i could fix one but you couldnt beleive me
and it wouldnt be worth your while
do a search on your modle number until you come up with instructions on how to add two caps to the pip board connector to bypass it
until you do this you are wasting your time
Mitsubishi ... we're still building Zeros
There is no vertical hold in the tv circuits now adays. You may find a vertical center or a vertical height. Your problem sounds like (if it has PIP Thats Picture in Picture) its in the PIP module and its a small module that stands up and most models of Mistubishi this module is no longer availabvle. The problem with the module is the small pana caps are leaking and ruins the PC traces. I have heard that theres a kit available on E-Bay to jump out this module. Now if its not the PIP model then it could be a few capacitors in the vertical sweep circuit. Also the B+ feed off the Flyback that supplies voltage to the vertical output IC could have a bad or leaky capacitor in the circuit. If your not a tech or solid state troubleshooter theres not much you can do and SHOULD take this set in to a repair center. Good Luck