Question about Emerson EWF2004 20" TV

1 Answer

TV Needs new 5 volt regulator

My TV does not turn on or do anything because there is no 5 volts where it needs to be and i don't know which componet is the 5 volt regulator because i don't have a schematic so if you have any information or even a schematic i could download that would be a great help thank you

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 2,267 Answers

Check for DC output at D653, if you have voltage there find Q682 and measure the voltage at the emitter. You should get 5 volts.
Just a question, if you are missing the 5 volts; do you have any other functions on the TV not working?

Posted on Apr 17, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 25" sharp not turning on


As i can not see the circuit or the schematic diagram... as you have said..there had no 5 volts, please check the IC regulator coded: 7805.

Oct 09, 2014 | Sharp 25R-S100 25" TV

1 Answer

Rolling screen? Mitsubishi tv model vs 60705. It rolls right to left, but when you turn the pip on it doesn't roll on the pup screens. What is the problem? What part do I need to fix it? I already have...


I want you to know I have been where you are on this same TV and what I found is there are three ICs all in close proximity on the SIGNAL BOARD that I recommend strong you try REPLACING all caps on the ICs as follows:

IC2P02--12 volts input and 9 volts output
change C1P01 on input 47 mfd/35 volts
change C2P03 on output 100mfd/16 volts

IC2P01--11.9 volts on input and 9 volts output
change C2P04 on input 47 mfd/50 volts
change C2P05 on output 100 mfd/16 volts

IC2P03--4 volts on input pin 5 and 3.2 volts on output 1 and 3.7 volts input on pin 2 and output pin 4 is 3.2 volts.
change C2P07 47 mfd/35 volts
change C2P09 100 mfd/16 volts

I know this is a bit technical but it is what is wrong with your set. Caps have polarity (positive and negative connections) They all must be unsoldered and new ones soldered back
The Signal Board usually has the tuner on it where the coax connects. The board needs to be removed by unplugging it to change the caps.

May 21, 2011 | Mitsubishi VS-60607 TV

2 Answers

I have a sony kv36fs200 its about 8 yrs old. the set takes about 20 min to come on . picture is perfect. do not hear the degaussing coil activate when it eventually powers up . first it was flashing 5...


TV needs screen volts adjustment, screen volt control knob is located on flyback transformer.
Turn On tv and rotate screen volt (G2) control knob clockwise little bit to increase volts to get picture. This problem related with picture tube as its performance seems weak and causing problem.

Aug 17, 2010 | Sony KV-36FS200 36" TV

1 Answer

I have a 35in t.v model cs-3505r made in 1989. picture starting to jump after its on for hour. if I turn it off for awhile its fine, then it start jumping again. Is there anything that I could do?


Just to make you aware that this TV is 11 if not 12 years old.

With age comes issues with components such as the picture tube 'CRT' or more likely 'Capacitors' to which are drying out.
These are like small little batteries that over time just don't hold their voltage charge anymore. If it's rated for 9 Volts DC it's only charging to 4 of 5 volts at first. Over some time when the TV is on it might just get up to 7 or 8 volts and start to work again.

Unless you change all or know what specific capacitors to change yourself. Might be best to invest in a new flat panel TV.
Just a thought!
Blessings,
A/V Media Guy

Feb 03, 2010 | Standard (CRT) Televisions

1 Answer

GE 32GT740 wont turn on


odds are high volt  circuit gave up. 100 150 repair 5yrs not worth repair.

Nov 22, 2008 | GE 32GT740 32" TV

1 Answer

Tv not coming on


Your TV will probably not work on 95 volts. It may even damage your set. To see if your TV is still working properly you need to find a source of 108 volts at the minimum. Why is your voltage so low? Are you using a meter to check it?

Sep 18, 2008 | Philips 20PT643R 20" TV

1 Answer

TXN2771HF (5yr old) - Front Panel a/o Remote Issue


Sounds like the 5 volt supply is low, Look for the 5 volt regulator, Measure you can go directly to the sensor 3 pins 1 will be 0 volts one will have 5 volts the other is usually a fluctuating 3-5 volts if 1 pin has to have 5 volts if it is low check capacitors around the 5 volt regulator probably 47uf to 100uf look for rusty look on the leads. If you see it change it! check these voltages with set turned off ( standby ) do not attempt if you dont know what your doing. Good luck. The reason it works when it is on is because there is a run 5 volt supplement.

Jun 20, 2008 | Samsung TXN2771HF 27" TV

1 Answer

Thank you for the suggestion


I have the schematic diagram if you need it.
Let me know where to send it to.

Apr 21, 2008 | Emerson EWF2004 20" TV

2 Answers

No power/RCA ctc187cl


Check for 5 volts present at pins of EEPROM IC. ( 8 pin-center
front) = no 5 volts = Re-check power supply components such as AC in resistor 2.7 Ohm ?....Or 5 volts ok,then suspect EEPROM corrupted........part # 223957 ( install 8-pin socket,then re-plug in original, if that doesn't clear it, plug in
new part) Use pre-programmed after-market replacement,if you 
can get it.....Let me know....T.

Oct 30, 2007 | RCA F32450 32" TV

1 Answer

Screen colour missing


this problem could be a few things. first if you know how touse a volt metter go to the crt pcb on the end of the picture tube. Try to measer the voltage on the collector of the red drive transistor. If when the red color goes away and the voltage shoots way up past 150 or so volts then the red drive is disapearing from the video jungle ic or through one of the componets from it. If the voltage drops way low like less then 65 to 75 volts or less then theres a cold solder connection between the b+ feed resistor that suppys the b+ to the drive transistor the driver power supply sourse.. In an extremely rare case would the Picture tube be at fault but certainly could be. Good Luck OOps almost forgot it could als be a bad connection on the crt socket as well..

Apr 05, 2006 | RCA 27F530T 27" TV

Not finding what you are looking for?
Emerson EWF2004 20" TV Logo

Related Topics:

53 people viewed this question

Ask a Question

Usually answered in minutes!

Top Emerson Standard (CRT) Televisions Experts

The Knight
The Knight

Level 3 Expert

68157 Answers

Jaime Hernandez

Level 3 Expert

2267 Answers

matt martin
matt martin

Level 3 Expert

1191 Answers

Are you an Emerson Standard (CRT) Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...