I have the same problem with my unit. The on button momentarily turns green and then to red. I have checked the fuse and it is still in tack. Kelvin mentioned a "X Volt Regulator" as a possible source of the problem. I am trying to fix the TV myself and cannot find that part. What is the proper name and or part number.
An expert who has achieved level 3 by getting 1000 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert who has answered 1,000 questions.
Re: X volt regulator
1) Unplug wire harnesses = pull chassis ( requires 2 chassis bolt
2) Dis-mount Convergence / power supply board = the one with
3) Locate 5 volt regulators mounted to heatsink
4) Remove old solder from pins of all four regulators =
Re-solder + solder any / all bad conncts on board....
5) Replace bad 4 amp fuse hidden in power supply area...
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Fault to the main power supply regulator section. Either it will be on a separate board, or on the part of its main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/
Find the Regulator & unplug. Connect a AC volt meter to the 3 white wires at the connector that is unplugged from the reg. connecting the 2 red & black meter leads to ANY 2 white wires at the plug (colors don't matter with AC. Run the bike & rev up. You should have starting at about 30 volts ac Up to about 90 volts ac reved if the Stator is good. Now move the 2 meter leads to 2 more white connections & check again. Now you have one more pair of white connections to check. Should have the same 90 volts on any of the 3 pairs of whites (3 phases). If they are low, The startor inside the cover is burnt--Replace it. If good, Then the Regulator/Rectifier Unit that rectifies ac to dc & then regulates the output at 14 ~ 14.5 volts DC on the red & ground (Green or black or housing ground) to go to the battery is the only other part that is for charging. You can't test a regulator other than to see if you have 90 v AC going into it & the plugged in it should be showing 14 Volts DC at the battery terminals , Not just 12 volts. Make shure you have a fully charged GOOD battery before tests or the readings will all be off.
The red light is associated with the memory (constant 12 volt power). You also need switched 12 volt power (power with key turned to accessory)for the unit to turn on. If you installed the system yourself, you are looking for 12 volts on the red wire of the Jensen unit. If power exists at the unit, check the fuse of the unit and the fuse of the vehcile.
1. move unit closer to cad sensor, if it works your battery in Cad is weak, change it with CR 2032 (3 volt).
2. are you pressing the reset button , the red light comes on then turns green and blinks green for sixty passes of the Cad.
3. If the red light does not turn green the reset button is faulty.
4. make sure its a 305 and not a 205 as this does not work with cad ( I know! but you would be surprised how many dealers will sell both units together)
ok , on hitachi pro tv is very common with bad power supply u may want to replace the voltage regulator which is next to the fuse u already replace , also loose connection on all the power supply seccion , also u may want to check the resistor close by the convergence ic 2.2 ohn if this are smoke replace stk392-110
HI, this unit has 3 main fuse links on the main board that may be blown. the fuse links should be check before you move further into the diagnosis stage. once you have checked the fuses and they are still in a working state, this will confirm a power supply board failure. this board provides and regulates the current flow and distribution of it throughout the entire unit. If the fuses are fine and the power supply board is damaged, the green light will come on briefly then, the main control will notice that the power supply is not functioning properly. Once the main control board senses an abnormal current, it will shut down the TV rendering the red light warning. The list of fuses to check are below. Remember, if they are fine and working, the issue will be the power supply board itself and, it will need to be replaced.
FUSE CHECK LIST--
3A 12v- fuse----(242208600623) SM 3A 125v-fuse----(242208600657) 500 MA-fuse-----(242208611092)
It sounds like a faulty voltage regulator or diode on the power supply of the stereo. If you can check these things yourself also check for dry joints before checking diodes and regulator/s. If not trust a competant techmnician. Good luck.
Have you opened the unit to take a look inside? Since you dont have a blown fuse we cans assue the a short has not occured. Now I would chect to see if the voltage regulator in the amp has voltage coming from it. It may not in that case you may have to remover the old regulator and put in a new one just to get to the point of properly troubleshooting this amp. I would suggest that you get a schematic for this unit and use a multimeter to look at the voltages in the power supply section and see which sections have no rail voltage (12v supply voltage). I would also advise checking the remote to for regulator failure.
If you're NOT still under warranty you should at least open the TV and look for a blown fuse near where the power cable enters the set. A lot of times you can buy replacement fuses at a local electronic or hardware store and they're easy to replace.
Check the fuse. If it is blown, it will be obvious and make sure that the set is unplugged before replacing it. If it blows again, or if it is not blown, your problem is probably in the 'X' volt regulator and you will need professional help with the repairs.
You can also check the board where the components are mounted and resoled any that look bad. Brief power outages may cause the TV to turn off on its own. If you are using a surge protector, try connecting the set directly to the wall outlet.
In your case it could caused by a blown fuse, a leaky diodes or a bad solder joint at the horizontal drive transformer.
All can be replaced at a local electronic or hardware store and they're easy to replace
If this does not correct the problem, you may need to have your TV serviced.