Question about JVC TM-2703SU 27" TV
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
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
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
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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