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no color on sony wega trinitron when hooked up to satellite, but plays movies in color
Problem for Sony FD Trinitron WEGA KV-27FS120 27" TV
No power to kv-27fs120. suggestions on repair
By hunter_ju976 on Oct 30, 2009
no power to kv-27fs120. suggestions on repair
Comments:
Oct 31, 2009
- unsure what fuse to be checking as the main fuseOct 31, 2009
- what fuses. What do they look likeOct 31, 2009
- which fusesOct 31, 2009
- motherboard schematic please so can be sure what am looking forClarification Request
Posted by assistencia_ on Oct 30, 2009
check internal fuses
Solution #1
posted on Oct 31, 2009
Is it completly dead or do you hear a click (internal to TV)?
If completely dead - check main ac fuse.
Otherwise here are some tips:
A dead set (no picture no sound) can indicate any number of problems – Usually the set is in shutdown or protection mode – this means that the internal circuits have detected a problem with a supply voltage missing, drawing too much current, going over voltage or a short condition.
The first thing to do is power off the set unplug it for 5min. than replug and try again. This in effect resets the main micro and will sometime unlatch a fault and resume working. There are certain common problems based on the make model (forSony -bad solders on horizontal drive transformer/regulators short)– for instance convergence output IC’s(CRT projection TV’s) can cause a dead set symptom in many models. Vertical output IC failure can also cause the same symptom (CRT standard and Projection).
The only way to determine the real cause is :
By an educated guess based on experience or by directly troubleshooting the set – checking fuses, measuring voltages and checking for shorts. Many of the intermittent problems such as, int.(Intermittent) no sound or picture, int. picture shrunken or misshaped. These problems are generally due to cold (bad) solder joints (all TV’s and electronics) that break down under slight temperature changes or vibration and are usually verified by physically tapping the suspected area on the circuit board, or by quickly heating or cooling a suspected component or area ( cold spray and hot air gun). The other main culprit is leaky or dried out capacitors or capacitors that change value depending on temperature. These can sometimes be seen as bulged or leaky and have an acrid odour. Be sure to vote/rate me if this helped Thanks!
a6.3A 250VAC fuse
you can buy a service manual @ servicemanuals.net -or google model # to see if you can find one for free.
If completely dead - check main ac fuse.
Otherwise here are some tips:
A dead set (no picture no sound) can indicate any number of problems – Usually the set is in shutdown or protection mode – this means that the internal circuits have detected a problem with a supply voltage missing, drawing too much current, going over voltage or a short condition.
The first thing to do is power off the set unplug it for 5min. than replug and try again. This in effect resets the main micro and will sometime unlatch a fault and resume working. There are certain common problems based on the make model (forSony -bad solders on horizontal drive transformer/regulators short)– for instance convergence output IC’s(CRT projection TV’s) can cause a dead set symptom in many models. Vertical output IC failure can also cause the same symptom (CRT standard and Projection).
The only way to determine the real cause is :
By an educated guess based on experience or by directly troubleshooting the set – checking fuses, measuring voltages and checking for shorts. Many of the intermittent problems such as, int.(Intermittent) no sound or picture, int. picture shrunken or misshaped. These problems are generally due to cold (bad) solder joints (all TV’s and electronics) that break down under slight temperature changes or vibration and are usually verified by physically tapping the suspected area on the circuit board, or by quickly heating or cooling a suspected component or area ( cold spray and hot air gun). The other main culprit is leaky or dried out capacitors or capacitors that change value depending on temperature. These can sometimes be seen as bulged or leaky and have an acrid odour. Be sure to vote/rate me if this helped Thanks!
Comments:
Oct 31, 2009
- Unplug set -Remove back cover- follow power cord to main board. Look for this
a6.3A 250VAC fuseyou can buy a service manual @ servicemanuals.net -or google model # to see if you can find one for free.
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