When connected to on-air or RF cable services, when you tune in the TV, the channels does not lock up and goes non-stop tuning process.
No tuning lock. But tuning process is on the way.
This fault is due to its memory IC. The memory IC used with this set is (IC003) [(M24C08-BN6(A)] . Please note the number of this IC. Even thouth it is very small in size, and very cheap to buy, function of this IC in circuit is great. When replacing it, be very cautious about the number. Must replace it with same number, otherwise the TV won’t even switch ON. When replacing this IC, replace the reset IC (IC002) [MM1319AFBE] too. Both of them are ‘8’ solder terminal DIL type ICs.
As far as tuning lock is concerned, these are the components to be suspected and replaced. All the other [including mains system control IC, tuner etc:- are working well, otherwise, you won’t get any picture at the screen for a glimpse at all.
