I can't find the model number for the TV but it looks old version . Where can I find it?
Model number if not the one listed here will be on label on rear of set along with month and year the set was made--
How skilled are you with working on (I presume it is a older direct view with a picture tube) sets?
A lot of the older JVC sets had a common issue---there is a single filter cap (it will look ok) that fails----Tell me model and If you are able I will try to direct you to it.
SOURCE: no picture or sound
You probably have one or two diodes bad which would have to be unsoldered to replace. Since it is a small TV, it may not be worthwhile to take it to a repair shop -- if you can find a good electronics tech with soldering equipment and a multimeter, have them check out D951 a 12 volt zener diode near the power relay. If good, then I would check out D941 and D942 in the power supply. If all three diodes are bad, the set probably took a power surge or lightening strike and could have other shorted components as well.
SOURCE: JVC TV - No Pic or Sound-Blinking Red Timer Light
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
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
SOURCE: tv shutting off timer light blinking
Your TV is in the protection mode. First, locate the horizontal output transistor. This is found very close to, or next to, the horizontal output transformer (also known as the flyback). The flyback should be on an aluminum heat sink, or on the side of the metal chassis. Disconnect or unsolder two of the three legs of the transistor. Measure it with your meter, or plug in the set with the light bulb attached across the fuse.
If the transistor is shorted, or the light bulb doesn’t glow bright anymore, replace the transistor and plug back in. If the light bulb glows bright again, you must replace both the flyback and horizontal output transistor simultaneously. In some cases this will fix the set, but sometimes there are multiple problems with a set.
Go to where the flyback is, and start measuring the diodes and capacitors on the flyback itself. If you don't find any shorts there, it could be a shorted vertical output IC, a shorted sound IC, a shorted disc capacitor in the Hi Voltage/sweep circuit, or in rare cases, a shorted capacitor or tuner.Feel free to ask and post whatever the result of your troubleshooting..
Hope this may help;
Regards,
VOTIT
DON'T FORGET TO RATE
check the horinzontal out transistors. call qualified personnel to fix.
78 views
Usually answered in minutes!
×