Hi,
It is about a Sony KDL-46EX500 that was struck by lightning.
I did not see any visual damage on it.
An internet provider box and the Ethernet port of an AppleTV were also out of order.
My following remarks refer to this schematic ; https://www.badcaps.net/forum/attach...2&d=1378923377
posted by https://www.badcaps.net/forum/member.php?u=16669.
Thanks to him :-)
There was nothing on screen, and after a few seconds, it gave the 2 blinks code.
As I had no 394V on the C6516 capacitor; I decided to change IC 6501 (CXA 3809M).
Always the same behaviour, but now, the new IC6501 was heating a lot.
I found then that the zener diode D6101 (MAZ8056G0LS0 ) had a fix resistance of 8 ohms. So I replaced it, and I finally got +394V on the capacitor.
Now, things have changed and I get a very weak SONY logo on the screen, and the audio chord associated n the loudspeakers.
A strong «*buzz*» is coming from T6801 transformer during 1 second or so (the time of SONY logo appearance), then this repeats once more, and all stop with a 6 blinks error code.
I measure (when Power Supply alone with 1K resistor between pin 1 and 3 of CN6150:
16,2V at the legs of C6206
394V at the legs of C6516
When all cards are connected on the chassis, I measure:
on CN6150 connector:
STBY3.3V 3,3V
AUDIO_12V 12,8V
REG12V 12,8V
BL_ERR 3,3V then 0,06V during buzz, then 3,3V, then 0,06 during buzz, then 0V
BL_ON 0V then 3,26V during buzz, then 0V, then 3,26V during buzz, then 0V
DIMMER 2,3V during buzz, then 0,3V, then 2,3V during buzz, then 0V
T-CON_Vcc12V 12,76V
T_CON_ON 3,3V during buzz
on the CN6702 connector:
VCC_12V 12,75V
LD 12,10V and 12,09V during buzz
FB 0,04V AC during buzz
Sorry if I have not been clear…
I also checked many components, that seem to be OK, especially these that I desoldered before testing:
Q6501
Q6502
Q6601
Q6602
Q6603
Q6604
Q6301
So… if you can help me …
Thanks a lot !
Christian
It is about a Sony KDL-46EX500 that was struck by lightning.
I did not see any visual damage on it.
An internet provider box and the Ethernet port of an AppleTV were also out of order.
My following remarks refer to this schematic ; https://www.badcaps.net/forum/attach...2&d=1378923377
posted by https://www.badcaps.net/forum/member.php?u=16669.
Thanks to him :-)
There was nothing on screen, and after a few seconds, it gave the 2 blinks code.
As I had no 394V on the C6516 capacitor; I decided to change IC 6501 (CXA 3809M).
Always the same behaviour, but now, the new IC6501 was heating a lot.
I found then that the zener diode D6101 (MAZ8056G0LS0 ) had a fix resistance of 8 ohms. So I replaced it, and I finally got +394V on the capacitor.
Now, things have changed and I get a very weak SONY logo on the screen, and the audio chord associated n the loudspeakers.
A strong «*buzz*» is coming from T6801 transformer during 1 second or so (the time of SONY logo appearance), then this repeats once more, and all stop with a 6 blinks error code.
I measure (when Power Supply alone with 1K resistor between pin 1 and 3 of CN6150:
16,2V at the legs of C6206
394V at the legs of C6516
When all cards are connected on the chassis, I measure:
on CN6150 connector:
STBY3.3V 3,3V
AUDIO_12V 12,8V
REG12V 12,8V
BL_ERR 3,3V then 0,06V during buzz, then 3,3V, then 0,06 during buzz, then 0V
BL_ON 0V then 3,26V during buzz, then 0V, then 3,26V during buzz, then 0V
DIMMER 2,3V during buzz, then 0,3V, then 2,3V during buzz, then 0V
T-CON_Vcc12V 12,76V
T_CON_ON 3,3V during buzz
on the CN6702 connector:
VCC_12V 12,75V
LD 12,10V and 12,09V during buzz
FB 0,04V AC during buzz
Sorry if I have not been clear…
I also checked many components, that seem to be OK, especially these that I desoldered before testing:
Q6501
Q6502
Q6601
Q6602
Q6603
Q6604
Q6301
So… if you can help me …
Thanks a lot !
Christian
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