20 Most Recent
Akai LCT2785TA 27 in. LCD Television Questions & Answers
TV has shadowing double images/colors are uneven
It sounds like the problem one can have from a weak signal.
This kind of problem is normally associated with the use of an antenna which is receiving the primary signal, then a secondary one that is being reflected to you from a distance; an echo.
The first signal is the one you are seeing best, then from some distance, the same signal is being sent back to you with a time delay of a few microseconds causing a shift in the images.
A repositioning of the antenna orientation is the only solution.
If you are on cable, you will need to call them and holler about the signal quality.
Thinking this through, I don't think this can happen when receiving satellite signals since the antenna is pointed toward the sky and the chances of any noticeable reflection are close to nil.
Akai LCT2785TA - Where is the inverter?
diagrams are not to be found for most modern sets as they only sell boards---google the model with "parts" to locate the board which in most cases will have a photo of it---then you know what to look for
Tv will not come on or do anything
I see so many here with no sound/nopicture issues:ISSUES: 1. IF sound main fuse/s are good.2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.3. almost all these sets the troubleshooting involves
checking voltages on the main power board to narrow down theproblem.4. Be safe and if you do not know what you are doing don't open the set.Answers to issues:1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.4. Safety first--no TV set is worth getting injured or even killed over.
A bad cap will look like these with the tops puffed up--should be perfectly flat and no brown material coming out of them.
Trying to connect a sony home theatre system so
The HDMI jacks on the TV are HDMI in. Thus to get the theater system to play the sound, you use the HDMI out from your set top box to the HDMI in of the Sony theater system and then the HDMI out of the theater system to the TV. (Connecting the HDMI in of the TV to the HDMI in of the home theater system will not work.)
If you are watching OTA TV or a direct coax cable connection, you need to hook up the TV audio out to the home theater system audio in to use these speakers with the TV. Then you probably need to set the TV to use the external speakers. This will probably be in the Menu under Audio. (Toggle external speakers on/off)
The Akai LCT2785TA has RCA audio out (1/4" red and white jacks). If your home theater system has RCA audio in, just get a patch cable (MM ends on each side of the cable). If your home theater system only has digital audio inputs, you will need a converter.
http://www.ramelectronics.net/audio-video/audio-converters-extenders/analog-to-digital-digital-to-analog/1t-ap-216/prod1TAP216.html is a link to one appropriate converter.
I hope this helps.
Cindy Wells
Tv lcd akai
Hello
to all from Tom Arnold, WA6OVP
Subject:
Repair of computer monitors or flat panel TV’s.
History:
Recently my wife's 27-inch AKAI (LCT21AS) 27-inch flat panel HDTV with DVD
player quit working. Years ago, when I had an analog computer monitor quit
operating; Joe Fadden WA6DDF had mentioned to me, that often computer monitor
problems were caused by the monitor's power supply. Joe also said these power
supply problems were often caused by failed electrolytic capacitors. Joe said
he was able to fix many computer monitors by just changing all of the power
supply electrolytic capacitors. Rather the fix that failed monitor, I just a
bought a new one.
Symptoms:
The inoperative HDTV had been bought at COSTCO and had already been returned
once to a COSTCO repair center for repairs. Cost to ship and insure the HDTV
was 67 dollars. We received back a new HDTV set. Turn around time was over a
month, with many long distance telephone calls being required. The new HDTV
worked for about three months after it was received. When the returned HDTV
failed, it trapped a DVD disc that had been left in the HDTV DVD player. The
new HDTV failure symptoms were the same as the original HDTV failure. The red
led indication would not change to green when the remotes power on button was
pushed. There was no picture and no sound. The remote is required to operate
the TV set.
Economics:
My wife's HDTV with internal DVD player was very expensive. Worse yet, the
trapped DVD disc was the movie Flash Gorden Space Soldiers 1936. A local TV
shop wanted 85 dollars to look at the failed HDTV; repairs were 75 dollars
labor an hour plus parts. I quickly figured out that if I could fix the problem
it would save a lot of time and money.
Internet
Search:
I checked the Internet to determine if other AKAI owners had similar problems
with their HDTV sets. There were lots of AKAI 27 inch and 32 inch HDTV set
owners listing problems. Without exception all of the complaints concerned the
HDTV power supply PC board and failed electrolytic capacitors.
General
Internet Consensus:
Most of the AKAI HDTV sets worked just great and that many had been sold
worldwide. There were some AKAI HDTV sets that did have power supply problems.
Most of the AKAI HDTV set owners were not very pleased with either AKAI or the
COSTCO response to the inoperative HDTV power supply problem.
Trouble
Shooting:
All electrical power was removed from the HDTV set. The HDTV was placed face
down on a workbench with a piece of cardboard to protect the display screen.
The HDTV back panel cover was removed. There were many screws of several
different sizes. The power supply PC board was separate from the rest of the
set's components and was easily identified. The power supply PC board contained
several different individual different voltage power supplies. Three
electrolytic capacitors located on the PC board had obviously failed. The tops
of these three capacitors were puffed out. Often when electrolytic capacitors
fail they get over heated and the top of the capacitor is puffed out displaying
an over pressurized appearance. The power supplies on the PC board were of the
switching type. Switching type power supplies are also used in computer
monitors to save money and weight.
Power
Supply PC Board Removal:
The power supply PC board was mounted to the HDTV back panel with several
screws. These screws were removed. There also several multi-pin connectors
attached to the PC board. These connectors were numbered with a black felt
marker to ensure correct reinstallation. The connectors were Hot-glued in
place. A sharp knife was used to remove the hot glue. The connectors were
removed.
Repair:
The three suspect failed capacitors were easily removed. The three capacitors
were each 1000 ufd and rated at 16 working volts. The other power supply PC
board electrolytic capacitors were visibly checked. Three new capacitors were
installed, they were rated at 1000 ufd at 25 working volts. On the PC board the
three electrolytic capacitors were in just one of the power supply circuits and
were identified as EC18, EC19, and EC20.
The
New Electrolytic capacitors:
These were low impedance / high reliability radial lead polarized aluminum
capacitors, they have a plus and minus connection pins. Correct installation of
any polarized capacitor is required. The three new electrolytic capacitors were
specifically designed and rated for service in switching type power supply
circuits. Switching type power supply electrolytic capacitors need to be both
very robust and designed for use in high frequency circuits. General-purpose
aluminum electrolytic capacitors should not be used in switching type power
supplies, if capacitors designed for switching power supplies can be obtained.
Final
Repair Steps:
The PC board was reinstalled without the electrical connectors to the PC board
being hot glued. The HDTV back panel cover was refastened. Watched episodes one
through five of Space Soldiers. It was well worth the time and three
electrolytic capacitors to fix the problem. The repairs saved a lot of time and
money. The repair was very simple and not the least challenging. It took longer to remove and then reinstall
the HDTV back cover panel than it took to replace the three failed capacitors.
Safety:
These
types of repairs should not be attempted without a complete understanding of
the dangers involved with working on electrical equipment, especially working
around power supplies and charged capacitors. Proper desoldiering and
soldiering techniques need to be used.
Conclusions:
Flat screen computer monitors and TV sets do fail. Repairs of electronic
equipment can be very expensive. When your computer monitor or flat screen TV
does fail, you might consider a visible inspection of the equipments power
supply. A simple repair might save you a lot of time and money.
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