Question about Dynex DX-LCD37 TV

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I get a limited channels shouch as 5,77,11,13 & a few higher channels

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Do a re-tune to this TV, after a reset. There are two types of reset to TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight; will be better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.

Posted on Nov 02, 2014

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Posted on Jan 02, 2017

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Limited channel


There are unfortunately areas where tv channels are limited. For example, Dorset has something like 27 available channels. If you're in the U.K., check Freeview coverage for your post code. (Using a search engine).

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1 Answer

It keeps blowing a fuse


Generally, if you are using the manufactures fuse rating you can use a slightly higher rating and it will resolve the blowing fuses. Fuses supply resistance, if there isn't enough resistance you'll fry the system board in the amplifier. But if you have 25 amp fuses installed, install 30 amp, if you have 30 install 35 amp, 35 install 40. Anything higher will damage the amp.

Hope this helps.

A rare chance, something may be internally wrong with the amp and shorting it out which will blow the fuse.

Use the incorrect wiring of subs to the amp, you'll blow fuses and damage the amp from it turning off consistently. The amp should be running at 2 ohm stereo stable or 4 ohm mono stable.

Very few amps are designed to run at 1 ohm or less. Not to mention the subs can't handle it.

Jul 28, 2010 | Power Acoustik TS980-2 2 Channel 980W...

1 Answer

How manny watts per channel??


I'm guessing the 200w are the Speakers maximum input, right?
Is the sub passive or active(=integrated Amp)?

If it's a passive sub:
If it's a 2-Channel Amplifier, you're talking about, you won't be able to connect all 3 - unless you can live with one speaker being significantly louder than the other or your amplifier going up in smoke...

As to the power required, if it's 250W PER CHANNEL the amp will blow your speakers, if it's 250W combined you may not be able to drive them to their absolute limit but they will be loud enough (they probably reach their db-limit with less than 200w but if they reach it with 200, you'll only get ~6db less than that with 125w per channel)

The Watt-numbers on (passive) speakers only tell you how much they can take before they are damaged, the relevant numbers for your problem are the efficiency (the unit is db/W or db/2,83V) and the maximum db-level (most floorstands can produce between 100 and 110 db at one meter distance)

If your speaker produces i.e. 87db/W at 1 meter distance (which is the standard measuring distance), it will produce ~97db at 10W, ~107 at 100W, etc. - unless it reaches it's limit before that. Most speakers can take a lot more power, than they need to reach their limit but they won't get any louder if you keep turning up the volume beyond that (they'll probably produce more distortions though, so don't)


As to the sub:
if it's passive, you'll need another amp (there are special amp-modules for subs, but any amp with enough power will do)

if it's active, you can connect it to the sub-out of your preamp (I'm guessing the PA Amp you mention is a Main Amp, not an integrated one) or your integrated amp via cinch (a tape-out works too)

OR you can connect it to the speaker outputs and than connect the speakers to the sub - in that case the sub is still NOT driven by your main amp but you can use it's crossover to separate low frequencies (--> SUB only) form higher frequencies (--> SPEAKERS only).

Most active subs can be connected both ways, if yours can't your stuck with one.

Rarely there is a third way, which only works if your sub supports it and if you either have seperate Pre- and Main-Amp or if your integrated amp has a Pre-Out and a Main-In (in that case in can be split into preamp and main amp)

IF you want to use your subs Crossover (which is good idea, provided it has one), you'll have to connect it between Amp and Speakers (works with allmost all active subs) or between preamp and main amp (works only with a few)



I hope this is helpful

Jan (Hamburg, Federal Republic of Krautistan)

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How to program a bc855xlt uniden bearcat scanning radio


Major Functions of Uniden BC 855 XLT Desktop Scanner

RANGES AND MODES:
29-54 MHz; 137-174 MHz; 406-512 MHz; and 806-956 MHz NFM; 118-136 MHz AM

MEMORIES & MEMORY SCANNING:
• The 855 receives mainly via frequencies programmed into its 50 memory channels. It does not have a VFO or dial mode as such, but can scan within two frequencies.
• To scan memory channels, press SCAN. To hold a channel, press MANUAL.
• The 50 channels are divided into 5 banks (Bank 1: Channels 1-10, Bank 2: 11-20, etc.).
• Any of the 5 banks can be turned off from scanning. To turn a bank on/off, press its number while in Scan Mode. Active banks are illuminated in the display.
• SPEED toggles between 8 & 16 channels per second in both scan & search modes.
TO ENTER A FREQUENCY IN A MEMORY CHANNEL:
• Press MANUAL.
• Press the channel number you wish to program using keypad.
• Press MANUAL again.
• Enter the desired frequency using the keypad.
• Press E (ENTER). (If you make an ERROR, press CLEAR & re-enter frequency.)
• To set 2-second delay, press DELAY. Confirmed by “DLY” in display. Same deselects.
• To lock out channel from scan, select it & press LOCK OUT. Same deselects.
PRIORITY CHANNEL: Press PRIORITY to scan Ch. 1 every 2 seconds.
TO SELECT CHANNELS MANUALLY:
• Press MANUAL.
• Press desired channel number on keypad.
• Press MANUAL. Press MANUAL repeatedly to step through channels sequentially.
TO SCAN UP/DOWN FROM A CHANNEL: Select channel manually, then press ? or ?.
TO SCAN/SEARCH A GIVEN FREQUENCY RANGE:
• Press MANUAL.
• Enter the lower frequency limit.
• Press LIMIT.
• Enter the upper frequency limit.
• Press LIMIT.
• Press SEARCH.

I couldn't locate the manual for your scanner, but it's basically the same as the BC860XLT, except that the 860 has 100 channels. Other than that, all controls and functions are the same. You can download and print the manual for the 860 here:

http://uniden.com/pdf/BC860XLTom.pdf

For a comprehensive database of active frequencies in your area, and a lot of other useful scanning info, visit:

www.RadioReference.com

BillB

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1 Answer

Sony KV-27V22 scrambled picture and loud buzzing audio


the variation from higher channels from lower channels, few things changes eg frequency, voltage, and current.
take your tv to a w/shop and have the following
tunner voltage pulse variation on a avo meter has you change channels. if the difference of voltage is not unform when you are changing from to channel then you should change the control ic on the rf stage or check the capacitors a round the rf ic for variations in value.

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1 Answer

Looking for a good amplifier


Any 2-channel (or greater) receiver or integrated amp with at least one Tape Monitor loop; or any separate amplifier - will work. I would look fror one with true > 100 watts per channel, all channels driven, 20-20000kz + a few dB, with less than 0.5% Total Harmonic Distortion (in other words clean and powerful) should suffice. Specific brands don't matter. I'm partial to old Carver amps.

-----

However, should you get a multi-channel amp for the 901's you will be limited to using only 901's on it as the required Active Equalizer would affect all speakers attached to the amp, and conventional speakers would not sound right and could possibly be harmed by it's drastically-altered frequency response. Since using the Tape Monitor on modern DSP Receivers disables their digital inputs, that would limit what you could listen to, should you later decide to go with Cable Box, DVD, SACD, DVD-Audio, Blu-Ray, DTS etc.

* There are no some multichannel receivers out there that allow separating the preamp-amp circuitry for each channel to allow for differences in speaker processing. I think Marantz had one.

However, having a 901-based multichannel setup myself, I would highly recommend getting the Full Monte for video listening (below)...

In that case a separate stereo amp for the 901's would work. I run a Carver AV-406 (5-channel amp) for my 901's in Front, 2 Subwoofers and the Rear Surround channel, with the Active EQ between the receiver Front L&R Outputs and the 901's amp channels. My receiver controls everything and just drives the Center and Surround speakers.

You could get by with just a stereo amp for the 901's. A Carver M-200 is a good efficient amplifier that would have you cooking just fine (2x100W). Run it with the Active EQ between the receiver Front L&R Pre-Outputs ** and the 901's amp channels.

** Front Pre Out (or one of your analog Tape Outs) >>> Bose EQ Amplifer IN, then
Bose EQ Amplier OUT >>> new amplifier IN.


Attach the 901's to the new amp, set its volume to Max and run through your receiver's speaker level setup.

Write off the Tape Out as an input if you use it to extract the Front L&R channels. DO NOT monitor it or you'll chop the 901's out of the signal path AND kill any digital source audio in the receiver.

---------

So to sum it up, I think you should start with a powerful, clean amp with few bells and whistles for the 901's and maybe later add a multichannel receiver with all the magicfor source control, DSP and to drive the other channels.




Jan 05, 2009 | Onkyo TX-DS747

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