Question about JVC TM-2703SU 27" TV

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Hi I need any available information on this tv jvc 7808ME because it has two problem . low brightness and absence of Red colour. and noisy sound . plz help

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5 Suggested Answers

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Intermittant issues are always the hardest to troubleshoot. It could be a loose connection or a component that breaks down under load or thermally.

Posted on Feb 15, 2007

  • 934 Answers

SOURCE: JVC TV - No Pic or Sound-Blinking Red Timer Light

I believe I've answered this one or one identical to it:: If not, No sir... Nothing short... The red blinking timer light indicates the the protect circuit has it shutdown. That's happened because something has probably shorted along the B+ line. If it were here in the shop I would be checking the following: IC911 Str-G6624 regulator PC921 Tlp421 F905 5a Pico Fuse C931 160v/100uf cap and the HOT of course 2Sc2539 One or more of these parts has probably failed but usually not all of them.. So it's not an expensive repair. Now, while you're having that done also have them do the following modifications for greater reliability if it hasn't been done already: Remove D701 you don't need it. Install C705 (47uf/16v) in space provided (near Ic701 Pin 22 ) Replace jumper W122 with ferrite bead (Qqr0582-001z) Add a cap(47uf/16v)between pins 61 and 64 of Ic701 neg to pin 64 and pos to pin 61 This is per a JVC bulletin that the shop you take it to may or may not have. It's a simple and inexpensive modification and will add a measure of reliability to the years this set has left. As a footnote, take the set into the shop yourself and pick it up when it's done. This will help keep the cost down. All-in-all should be less than $150 if all the parts above got replaced. If you have any questions don't hesitate to ask. Hope this helps Bill 360-642-4993

Posted on Jun 07, 2007

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SOURCE: JVC AV 270305 Brightness not Bright enough.

Yes you could look for the capacitor that is leaky, probably in the 200v line, or you could just open back and turn up G2 screen control on the Flyback. You have Screen and Focus on this black transformer with a long anode lead going to the picture tube of set. Becareful, High Voltage!

Posted on Sep 08, 2007

  • 71 Answers

SOURCE: analog tv with poor color and brightness

probably tshe picture tube; time for new set

Posted on May 10, 2008

  • 19396 Answers

SOURCE: blinking timer red light on jvc tv, no other functions

The TV is on protect mode.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

Also ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem with no receiver box or dvd connected.

If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible reasons.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , startingthe flashing light.

If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occur are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Posted on May 22, 2009

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Assuming the CRT is still OK, it could either be:
1. Screen Voltage is low;
2. G2 B+ is out (common problem is a mega ohm resistor open);
3. a resistor gone high (or open) in the DA converter of the controller IC circuitry.

Any of the above would require extensive knowledge of electronic circuitry and components, use of a DVM and a soldering iron. Perhaps your best bet may be to seek the services of a professional.

Pls likewise consider the age of the TV (if a couple of years) and/or the downtime and cost of repair,. it may be more practical to purchase a replacement unit.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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have JVC AV-32F702 TV. It's picture color is very red. unable to adjust colors through menu. Channel numbers are also in red now instead of normal green. any suggestion? please check red color cathode circuit 1 check red output from ic to red cathode ckt 2 check voltage on r output ckt& ic or tr. 3 check loose contact in red cathode ckt 4 check crt base for loose. 5 loose connector 6 chroma ic thanks

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On the inside of the TV, on the flyback transformer there should be two controls. Turn the one that says "screen" very slowly clockwise while looking at the pix. The pix should get brighter as you turn it up- if you go to far you will see lines in the pix or the TV may shutdown.

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JVC AV-27530 Sudden changes in brightness

This sudden changes in brightness are caused by the change in voltage inside the tv,not in the outlet in the wall but inside the set,The changes are an indication something is going wrong and it needs to be corrected,the set does have a brightness limiter but it only works when the set wants to get brighter than normal,You need the assitance of a servicer to correct this problem.

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