Changhong 21B18EA-TB1238AN
OSD lost, damaged or slightly short T c in the OSD oscillator, the solution: open the pins are on OSD T oscillator GND.
Fig almost half of the top lines (such as B + ic vertical or less). ic vertical wear LA78040.
Damage to the R614 56k, stretchy value.
Konka-TB1238AN K2139C3
Disearching passed, difine OK but long lost, change in T c VCO (IC TB1238AN pin50 & 51) dg c ceramic 22pf.
For download schematic tv here DOWNLOAD