Service Konka And Changhong TV
Changhong 21B18EA-TB1238AN
OSD lost, damaged or slightly short T c in the OSD oscillator, the solution: open-pin T is in the OSD oscillator gnd.
Service manual konka Tv
Fig almost half of the top lines (such as B + ic vertical less). ic vertical wear LA78040.
Damage to the R614 56k, stretchy value.
Konka-TB1238AN K2139C3
Disearching through, difine OK but long mbleset, replace c in T VCO (pin50 & 51 of IC TB1238AN) dg c ceramic 22pf
