| View previous topic :: View next topic |
| Author |
Message |
rgionet
Guest
|
 Posted: Sun Jan 27, 2008 6:49 pm Post subject: Sony KV-27TS27 No Color |
 |
|
| I have a Sony KV-27TS27 TV with a perfect Black and white picture. No color. The menu and channel come out in color. Any thoughts as to what could be causing this? |
|
| Back to top |
|
 |
minnie
Joined: 18 Aug 2005
Posts: 2510
Location: Hell
|
| Posted: Sun Jan 27, 2008 9:49 pm Post subject: |
|
|
| Could be tuner or bad jungle IC. I'd try soldering the jungle ic and around it first. |
|
| Back to top |
|
|
frank
Guest
|
| Posted: Sun Jan 27, 2008 11:19 pm Post subject: Re: Sony KV-27TS27 No Color |
|
|
| rgionet wrote: |
| I have a Sony KV-27TS27 TV with a perfect Black and white picture. No color. The menu and channel come out in color. Any thoughts as to what could be causing this? |
Also check the cristal.next to the jungle ic |
|
| Back to top |
|
|
rgionet
Guest
|
| Posted: Fri Feb 15, 2008 10:33 pm Post subject: Sony KV-27TS27 No Color |
|
|
| What is the part number of the crystal you are referring to. I checked all solder connections around the Jungle and resoldered. The color is still missing and the channel and menu still come up in color. I tried a DVD player on the input jacks and there was no color either. Any more suggestions??? |
|
| Back to top |
|
|
minnie
Joined: 18 Aug 2005
Posts: 2510
Location: Hell
|
| Posted: Fri Feb 15, 2008 11:05 pm Post subject: |
|
|
| If you run a DVD player through video 1 do you have color? |
|
| Back to top |
|
|
Frank
Guest
|
| Posted: Fri Feb 15, 2008 11:16 pm Post subject: Re: Sony KV-27TS27 No Color |
|
|
| rgionet wrote: |
| What is the part number of the crystal you are referring to. I checked all solder connections around the Jungle and resoldered. The color is still missing and the channel and menu still come up in color. I tried a DVD player on the input jacks and there was no color either. Any more suggestions??? |
don't know placement # but it shoul read 3.5mhz or or some like.go here;
vectron.com/products/xtal |
|
| Back to top |
|
|
rgionet
Guest
|
| Posted: Sun Feb 17, 2008 1:06 am Post subject: Sony KV-27TS27 No Color |
|
|
Frank,
I tried to access that website you gave me, but it comes up as a dead link. Just out of curiosity, how do these crystals affect the color in the tvs?
... and as to the previous question from Minnie, yes, I have tried to run the dvd through video 1, and still no color other than that on the menu of tv. |
|
| Back to top |
|
|
Guest
|
| Posted: Sun Feb 17, 2008 3:03 am Post subject: Re: Sony KV-27TS27 No Color |
|
|
| rgionet wrote: |
Frank,
I tried to access that website you gave me, but it comes up as a dead link. Just out of curiosity, how do these crystals affect the color in the tvs?
... and as to the previous question from Minnie, yes, I have tried to run the dvd through video 1, and still no color other than that on the menu of tv. |
this is a croma Vco (Voltage control) cristal filter.
Some possibilities in no particular order:
Weak signal or defect in tuner/IF causing loss of signal strength.
Coler killer set too high (internal control) if it has one.
Defective part around the chroma chip/circuit. Faulty color oscillator.
Bad connections in area of chroma chip/circuit.
Defective chroma chip (don't suspect this first just because it is probably very expensive).
A service manual or Sams', DMM, and scope will help greatly in attempting to troubleshoot this unless it is an obvious bad connection. Try prodding the main board around the chroma chip with an insulated tool to see if you can make the color come and |
|
| Back to top |
|
|
Frank
Guest
|
| Posted: Sun Feb 17, 2008 3:08 am Post subject: Re: Sony KV-27TS27 No Color |
|
|
| Anonymous wrote: |
| rgionet wrote: |
Frank,
I tried to access that website you gave me, but it comes up as a dead link. Just out of curiosity, how do these crystals affect the color in the tvs?
... and as to the previous question from Minnie, yes, I have tried to run the dvd through video 1, and still no color other than that on the menu of tv. |
this is a croma Vco (Voltage control) cristal filter.
Some possibilities in no particular order:
Weak signal or defect in tuner/IF causing loss of signal strength.
Coler killer set too high (internal control) if it has one.
Defective part around the chroma chip/circuit. Faulty color oscillator.
Bad connections in area of chroma chip/circuit.
Defective chroma chip (don't suspect this first just because it is probably very expensive).
A service manual or Sams', DMM, and scope will help greatly in attempting to troubleshoot this unless it is an obvious bad connection. Try prodding the main board around the chroma chip with an insulated tool to see if you can make the color come and |
Weak signal or defect in tuner/IF causing loss of signal strength.
Coler killer set too high (internal control) if it has one.
Defective part around the chroma chip/circuit. Faulty color oscillator.
Bad connections in area of chroma chip/circuit.
Defective chroma chip (don't suspect this first just because it is probably very expensive).
A service manual or Sams', DMM, and scope will help greatly in attempting to troubleshoot this unless it is an obvious bad connection. Try prodding the main board around the chroma chip with an insulated tool to see if you can make the color come and go.
I had one set where a $.02 resistor decided to open up causing just this problem - perfect BW picture, no color. Another had a coil with a broken wire.other had the croma vco cristal bad. |
|
| 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
|
This is an open discussion forum, where you can discuss topics, related to home electronics repair (TV, DVD, Audio, VCR, Camera ...),
professional, measuring and test equipment service, professional audio equipment maintenance, computer hardware repair,
telecommunications equipment support, cell phones etc.
The second goal is to help in the process of finding and sharing electronic equipment documentation:
Service Manuals, Data Sheets, Schematic diagrams, Drawings, Repair guides and anything, that could help a service
technician to repair an electronic device.
Електроника,инструменти,материали:електронен магазин -
Service Manuals Free Download -
www.lipetsk.name
Free TV Schematics Download -
HARDW.net -
Pinout Master -
boom.bg : аукцион -
Jabse Search -
MondeTech
Connector Pinout Forum -
Новини -
SEO -
безплатен DNS -
Онлайн поща -
Poblizo.com : пътешествия
|
FAQ
