Question about JVC AV-56WP74 56" Rear Projection HDTV-Ready Television
Noticed a blue shadow on the screen, especially around letters. Performed auto converg. and noticed blue cross three times thicker than red or green. Went to manual converg. and could not get it adjusted out. A day or so later the convergance went way out as to have wavy lines and distorted picture. I replaced the convergance chips (purchaced directly from panasonic) thinking this would fix all. I ohmed out all low ohm resistors while board was out. All checked very close or right on value. Capacitors looked OK. After converg. board re-installed , did auto converg...took care of wavy / distorted picture but blue shadow still there. Cleaned lens on guns and looked at fluid and appeared clear. Tried to adjust focus of gun by rotating it...no luck. It is as if the blue gun is being over driven. I looked at the second level of service menu but do not know if it is adjustable from the menu or even If I should try it from this angle. Is it possible to swapp the green and blue gun leads on the converg. board to see if the problem moves? Will this hurt anything? Any suggestions , help, PRINTS...anything would be appricated Thanks Gmann
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Posted on Jan 02, 2017
Tips for a great answer:
The List & Labels part of the setup lets you edit your channel list and choose or create a
personal six-character label for each channel.
Note: Changing List and Labels can be time consuming. You can change these at a later time by accessing the
1. Press the left or right arrow to scroll through the available channels and choose the
channel you want to edit.
2. Press the down arrow to highlight the In channel list option. Press the left or right arrow
button to add (the box is checked) or remove (the box is unchecked) the channel from the
3. Press the down arrow to highlight the Channel label option. Press the left or right arrow
button to scroll through the available list of 25 most common labels. The last option in
the list allows you to create your own six-character label for the channel (the first letter of
the label is highlighted).
4. Press the 1 or 2 number button to change the first letter of the label.
5. Press the right arrow to highlight the second letter, then press the 1 or 2 number button
to change the second letter, etc...
6. When you are finished creating your label, press OK. For model D34W20, your TV tunes to
the last channel available in your channel list. For models D40W20 and D52W20 only, the
Auto Convergence menu appears next.
Auto Convergence (for models D40W20 and D52W20 only)
Your TV's picture tubes might have been disturbed during delivery or after you moved the TV,
causing the color in your TV to be out of alignment. The colors adjust by starting auto
1. Press OK to begin auto convergence.
2. When the auto convergence is complete, the Red center convergence menu appears. The
cross in the middle of the screen should be yellow. If it is not, use the arrow buttons to
move the red cross to overlap the green cross. Press OK when adjustments are complete.
3. The Blue center convergence menu appears with a cyan cross in the middle of the screen. If
it is not, use the arrow buttons to move the blue cross to overlap the green cross. Press OK
(the TV tunes to the last available channel in the channel list).
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