Scan lines at top when flyback replaced! RCA F32650

You have to go into the EEPROM service menu to slightly adjust the vertical height. Be carefull doing this. Write down the values you see, so you can adjust them as necessary, & do one increment at a time! Adjust P05, & P06. Look below. Hope this helps, Dani.

1. Press and hold MENU
2. Press POWER
3. Press VOL+
4. P00 and V00 will be displayed (left and right sides of screen)
5. Release MENU
6. Press VOL+ to set V00 to V76
7. Press CH+ to select and adjustment that you want to change ( "P00" )
8. Press VOL+ and VOL- to adjust

P01 Hours Freq. P07 Red Bias P02 Hours Phase P08 Grn Bias P03 EWDC P09 Blue Bias P04 EW amp P10 Red Drive P05 Vert Cent P11 Grn Drive P06 Vert Size P12 Blue Drive

Hi Dani,

Thanks, I;ve already tried the vertical size and vertical shift in the service menu, but the picture seems to fold over after so much adjustment. I can't adjust to totally get rid of the scan lines. Might there be some circuit modification that could be done to solve this problem.

I've read some posts about this flyback problem. Looks like you've run into this one before! Did adjusting vertical size fix the problem for you? Did you use substitute parts or originals?

Tyrone

Dani wrote:

Slight tweaking in the EEPROM has ALWAYS fixed these units after a generic flyback. Also, adjust the G-2 so it's not too high. Dani.

tyr> When I replaced the flyback transformer & HOT in this set (original

first off please excuse the spelling i'm an electronic tech not an english major.

i have the exact same problem

after adjusting vert settings in the sevice menu (this fixed the scan lines) except when the screen is black during a channel change or vid input change which leads me to.......

i noticed another problem

when watching cnn or espn when the picture gets brighter the running ticker on the bottom of the screen will boom out (enlarge, picture size increeses) when the image gets darker the picture shrinks ????????????

i adjusted the screen voltage to 211 volts as shown on the sams photofact (set 4792.pdf) that the suplier of the flyback was kind enough to send me. this gave me to dark of a screen and the osd menu black. turnning up the screen control till osd is good (requires very little adjustment very touchie ) now when monitoring the screen voltage at pin 7 of the crt the voltage varries from 206-224v depending what is on the screen dark pic or bright pic. if camera flashes are displayed the voltage really goes up and down.

also to let you know i replaced the H.O.T. (TL02), tp20,tp23,tp22,dp22,dp31,rp21 (all fried by the flyback),

and all the caps except the smd's in the LV-PS with parts scavanaged from a good CTC203 chassis witch is almost identical to the ATC113. in the lv and hv sections. in an attemp to correct this problem.

130v source in th LV-PS stays rock solid at 129.8v. 17v source is at 16v 9v source is at 8.8v 5.2v source is at 5.2v

-11.7 source is at -11.7v

15.3v source is at 15.2v and my 14v sorce (tp21) on print is at 16v. this is part of the flyback supply it feeds the sence curciut TP553 and the tilt curcuit and coil.

i think its the flyback or the crt?

I'm Frustrated!!!!

COOSIE

Dani wrote:

I think I'm gonna try to get another flyback for this model from a different source. Also, I'm gonna see if I can source the original! Anyone in Canada know of any possible places?

Thanks

Tyrone

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