View previous topic :: View next topic |
Author |
Message |
hyperfrog
Joined: 28 Jun 2010 Posts: 1
|
Posted: Mon Jun 28, 2010 5:00 pm Post subject: JVC AV-27D202 uneven brightness problem |
|
|
I got this CRT TV for nothing. I successfully fixed a folded display problem and thought everything was OK, but then I realized the TV has another, more subtle problem. The brightness is uneven, i.e. the left side of the picture is darker than the right side. This is particularly obvious when displaying a black image. It annoys me and I would like to fix that.
What should I look at? I used to work in the electronics field, but that was ages ago. I don't have much experience in TV repair, but I know a few things about TVs and video. I remember one can adjust the color purity by moving the yoke on the CRT's neck. Is brightness also affected? Or should I look at the horizontal drive circuit? I would intuitively suspect there's a bad capacitor in that circuit.
I have the schematics for this TV. I also have the service manual, but I don't have the original remote control, which is used to access a secret service menu. However, I doubt the hidden settings would allow me to solve that uneven brightness problem.
Thank you for your time! |
|
Back to top |
|
|
jts1957
Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away
|
Posted: Mon Jun 28, 2010 6:30 pm Post subject: |
|
|
Bad electrolytic C581 possibly. _________________ You're over there, I'm over here. |
|
Back to top |
|
|
|
|
|
You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
eServiceInfo on FB -
Service Manuals Free Download -
Service Diagrams
Free TV Schematics Download -
HARDW.net -
Pinout Master -
Jabse Service Manual Search -
Jabse.InK -
onTap.bg
SnimkiOt.com -
Poblizo.com : пътешествия
Latest Service Manuals :
• MF55-2401 GRUNDIG • Installing-Modem-43 apple • UH5540-TE MAKITA • 10 Accessory Prices IBM • CD-9916VCD Koss • ipd053n06n3 rev2.0 Infineon • UREI-7510B manual . Various • Описание DHT-684DVD DENON • 32-7334-1 PRINT I Programmers Ref 1956 I •
|