Hello guys , here I have an car radio "JVC KD-R35"
Problem is that only one bus of buttons from front panel works ,"KEY1" bus is working. Tested all the buttons and resistors also performed continuity test and at the least voltage test on the "KEY0" and everything is okay. So it is probably faulty in the main CPU "IC301"
Is someone have similar situation and is there any solution?
Thank you!
here is service manual "[HTML]http://www.electronica-pt.com/images/fbfiles/files/jvc_kd_r35_38_411_412_414_415_416_417_418_...
microcont
Member
Last Activity: 01-22-2017, 07:30 AM
Joined: 11-22-2013
Location: Mala Velika
-
Jvc kd-r35
-
Re: Philips 107S61 (CRT) power supply problem
Yes relay click in a consistent pattern -
Re: Philips 107S61 (CRT) power supply problem
I removed the line output transistor but the problem is still there, i think that is not worth of time to repair!Leave a comment:
-
Philips 107S61 (CRT) power supply problem
Hello,
here I have an Philips CRT monitor and when turn in power ,relay in power supply starts clicking. Section around flyback transformer doesn't have voltage on tranzistors.What could be problem and how to find it?
Capacitors all look fine and on primary side is voltage fine.
thanks for help!... -
Re: Grundig ST 70-713/8 dolby
So i was replaced all the caps on power supply big filter one, and smaller ones. And then after powering up fuse blow off .. so i find cause of that is the MOSFET T60506 "IRFBC40" shorted out, not working. Is that common fault on CRT TVs ? Now waiting that part in my electronic store to buy it and replace.Leave a comment:
-
Re: Grundig ST 70-713/8 dolby
some suggestion?
Tested that soldering it is ok. When TV goes to "ON" state, it is some discharging i don't know HV cable from flyback moves a little bit , and TV repeating thatLast edited by microcont; 01-02-2015, 09:10 AM.Leave a comment:
-
Grundig ST 70-713/8 dolby
Here I have Grundig CRT TV, problem is that it wont turn on all the time there is some sound like "zzk", "zzk" and repeating in some time intervals. On the board at CRT are "TDA6106Q" and around one of them is pins like somebody was re soldering or so.
So all of the capacitors looks fine and board itself.
Service manual:
[HTML]http://www.reptips.dk/Reptips/cuc2130.pdf[/HTML]...HTML Code:Here I have Grundig CRT TV, problem is that it wont turn on all the time there is some sound like "zzk", "zzk" and repeating in some time
-
Re: (CRT)QUADRO CTV-5525 ,Horizontal white lines problem
Now it is new C303 and R322 hehe thanks for the explanation
, i will remember that fault on TVs
Leave a comment:
-
Re: (CRT)QUADRO CTV-5525 ,Horizontal white lines problem
TV works after testing resistor R322 0.68Ohm to find out that it is an open circuit , and i replaced R322 with new 0.51Ohms. It works fine.
Thanks guys for help
Leave a comment:
-
Re: (CRT)QUADRO CTV-5525 ,Horizontal white lines problem
I change that cap, but no results still is the same screen with lines as beforeLeave a comment:
-
Re: (CRT)QUADRO CTV-5525 ,Horizontal white lines problem
vertical IC is: [HTML]http://www.rem-tv.odessa.ua/datasheets/v_def/LA7840.pdf[/HTML]HTML Code:Re: (CRT)QUADRO CTV-5525 ,Horizontal white lines problem vertical IC is: [HTML]http://www.rem-tv.odessa.ua/datasheets/v_def/LA7840.pdf[/HTML]
Leave a comment:
-
Re: (CRT)QUADRO CTV-5525 ,Horizontal white lines problem
at the output to the electron gun board it is 10uF 250V. It is very dusty trying to clean that.....Last edited by microcont; 12-16-2014, 03:57 PM.Leave a comment:
-
Re: (CRT)QUADRO CTV-5525 ,Horizontal white lines problem
try to adjust knobs on flyback transformer no results only changing brightness and sharpness, huh,i can't measure frequency because i dont have an oscilloscope :/ i can change parts in oscillator circuitLast edited by microcont; 12-16-2014, 02:44 PM.Leave a comment:
-
Re: (CRT)QUADRO CTV-5525 ,Horizontal white lines problem
on the flyback transformer are two knobs for adjustment focus and brightnessLeave a comment:
-
Re: (CRT)QUADRO CTV-5525 ,Horizontal white lines problem
So fault is probably in that circuit , where to find that part of circuit and is there any special part to look for?Leave a comment:
-
(CRT)QUADRO CTV-5525 ,Horizontal white lines problem
Hello, so I have this TV with the problem that on screen are these white lines .. so i tired to look around board but everything seems okay except some bad soldering joints that was resolder but problem is still here, this is not a priority repair i just what to learn something about CRT TV's. About CRT TV's I know only basic working principle from school. So thanks guys i can post more pictures of board,electron gun and so on.
Thanks
...
-
Re: Power supply from dot matrix Fujitsu printer
So, I need to change startup lytics caps?Leave a comment:
-
Power supply from dot matrix Fujitsu printer
Hello guys, here i have an PS , from Fujitsu old printer. It's seems good, all caps are fine , and there is zero damage, on board , and it must work , but it dosen't.
I can't find anything for this PS, so lets try here, i measured voltage on primary side and its all fine, but secondary i don't know 0 volts at everything heheh.
I tried something jump as "PS ON", tried to put load on output terminals, try guess nothing! ,It seems to have some "Photothyristor Coupler" [HTML]http://pdf1.alldatasheet.com/datasheet-pdf/view/43502/SHARP/S22MD1V.html[/HTML] , and some... -
Nytro Box NB-6000 Combo+. No boot
Hello.
Here I have "Digital Satellite + Terrestrial Receiver."
And it was working , and just stopped. And now when it turn on, only that is shown on TV screen is his manufacture image and name of the product.
Don't respon on any remote control buttons.
It has RS232 interface, for new software or something ?
Thanks....
-
Re: New Members - please post your introductions here
Hello, my name is Josip. I am going to electronic school in my city.
I have some experience in electromechanical course Relays , Motors (3PH) contactors.
My actual education is based on microcontrollers, TVs, radios , industrial electronics etc.Leave a comment:
No activity results to display
Leave a comment: