I've got a Z27X22D, older Zenith with a significant vertical overscan. It is such that it's impossible to read crawls and such at the bottom of the screen.
I came across a code to get into the service menu, but it only covers screen position, not screen size, and I need to reduce the vertical size a smidge.
The code I had (that doesn't seem to access the size menu) was Menu (hold until menu disappears but channel info is still up), 9-8-7-6- Enter.
Anyone have a clue for any other service menu access code?
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Re: Zenith Z27X22D Service Menu Codes needed
Significant vertical overscan. It is such that it's impossible to read crawls and such at the bottom of the screen.
I think this problem is a tv problem.
it is due to vertical section.
please change electrolytic capacitor in vertical output section. it will be ok.
it is common problem can be fixed at home & very simple.
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Zenith sets, like most others now, are adjusted electronically through a service menu. You'll need your original remote control (or a Zenith-brand universal replacement with a MENU key) to access the menu. Press and hold the MENU button until the channel number and time display goes away, then press 9, 8 , 7, 6, ENTER. This puts you into service mode.
In service mode, CHANNEL UP and CHANNEL DOWN move through the different settings, and VOLUME UP and VOLUME DOWN change the values. Make sure you write down the original value of anything before you change it so you can put it back if necessary. One of the reasons the manufacturers hide the service menu is because the set can be damaged by incorrect settings to some of the parameters.
On some models, you can't get to all the parameters unless you change
one called F MODE from 00 to 01. You might need to do this on yours.
The list of parameters varies by model and features. I haven't worked on a Zenith in a long time so I don't remember exactly what yours says, but you want to find two settings for V SIZE (vertical size) and V POS (vertical position). Adjust the size first by lowering the value until the top and bottom of the screen are black. Then adjust the position so the picture is centered (black strips close to equal size). Finally, increase the size until the picture fills the screen again. It's normal to adjust for a little overscan, meaning you push the top and bottom a little bit out of view. If you stop too soon, on some channels you might see flashing lines at the top of the picture.
When you're finished adjusting, turn the TV off to exit service mode. If you needed to change the F MODE setting, put it back to 00 first. Your picture should be properly sized after all this.
For Factory Menu, press MENU 1 3 7 0 Service Adjustment Mode, press MENU 2 3 5 7 Convergence Mode, press MENU 2 3 5 9 Use the VIDEO or VIDEO buttons to enter two different groups of adjustments Use the VIDEO / VIDEO buttons to toggle thru the adjustments Use the + and - keys to adjust When finished with adjustments, press ENTER to save Press MENU twice to exit service mode Hope this helps. You should look for the vertical height or size adjustment. Do not adjust anything you don't know about.
Does not seem like a bad tube alone. Could also be that the Video output Transistors Supply Filter capacitor having dried out. It is a 100mfd 160V capacitor, which on replacement will improve the brightness of the immage. And yes, you could also try increasing the heater voltage (Filament Voltage)of the Pictuire tube, this will definitely increase brightness, but will reduce the life of the Picture tube.
You gotta think - 10 year old TV, should I repair or exchange and get a new one???