I bought a sharp 27" tv about 5-6 years ago. I am getting very bad reception on the lower channels on 2 & 5. when I place the TV on channel 3 and use the vcr to tune and change channels it works fine. Does this mean my internal tuner is going bad and if so is it time to buy a new TV.
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Re: sharp 27" tv
You got the right idea,use the ext.imput on you tv and use the vcr to change the channels,you can check the solder conections in the tuner ,ussually the ground gets loose after a while but if you are not too familiar with tv service and dont want put any money in this set use your vcr.If the quality of the picture is still good then is worth keeping it.Let Us know if you need more information.
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you may want to try changing the coaxial aerial cable that feeds the tv, these can go faulty. also if you are running a series of tvs off one aerial, you should be using an aerial booster, other wise you will get a signal drop (as displayed on your tv).
If these small things don't cure it, the set requires replaceing as the tuning card is knackered
Tis is an ongoing problem I seen increase alot over the past few months. From what I can gather, all the channels being broadcast over going from the analog to digital, there's no big suprise to anyone. However, the change from analog to digital is changing at a faster rate, so when you look at the TV some channels will be fine and others will have grey lines, fuzzy picture. The only solution-you need a TV with some kind of digital tuner. On the TV itself if the (TV has one) it will say "SD" or "ED" which stands for standard digital or enhanced digital.
Intermittent loss of lower frequency channels ie Ch:36, higher channels ok
Dry joints in UHF tuner, resolder the PCB to casing earth connections inside tuner
Channel reception lost if tuner socket moved
Dry joints on IC522, IC521 and IC541 (located in the big heatsink about middle of the main pcb)
If you are on cable, first run the cable wire from the wall directly to the TV, eliminating any cable box and/or VCR. If channel 2 is snowy but the rest (especially 3-6) are clear, it is most certainly a cable problem and not a TV problem. The TV uses the exact same circuits for channel 2 to 6 (VHF-LOW) so if the tuner was bad and 2 was snowy, 3, 4, 5 and 6 would be snowy too. Bring a second TV into that room, disconnect the cable wire from the RCA and connect it to the second TV. Is channel 2 on the second TV as snowy as it was on the RCA?
no they are not related. ur tv seems to have a defective tuner(inspect also for possible cold solder inside the tuner). remote control can be clean using a cotton swab with a little isoprophyl on it. clean the contact on the pcb.