Re: Vizio E470Vl no backlight problem
bump please
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Re: Vizio E470Vl no backlight problem
any help would really be appreciated-thanksLeave a comment:
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Re: Vizio E470Vl no backlight problem
ok i tested the voltage regulators that were all numbered the same the had the same digits at the top which started out with like a backwards C and the number at the bottom were all 1117 so i assume they should all be the same voltages but i have 1 that is putting out voltage that isn't close to the others.All were taken with tv plugged in and turned on
Here's what they were
U2 1117
P1-2.04
P2-3.27
P3-5.03
U4 1117
P1-0.00
P2-1.25
P3-3.25
U7 1117
P1-2.04
P2-3.28
P3-4.99
U46 1117
P1-2.05
P2-3.30
P3-4.99
THEN I HAVE THESE TOO
U3 G1084
P1-2.01
P2-3.25
P3-4.98
U8 7805CT-RAT021G
P1-12.19
P2-0
P3-4.99
TU5 M113-G1084
ADJ-0.00
0-0.00
I-0.00Leave a comment:
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Re: Vizio E470Vl no backlight problem
ok checked them the one at position F1 is 5.05 on both ends of the fuse.the other two fuses measure 12.20 on both ends of both fuses.thanksLeave a comment:
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Re: Vizio E470Vl no backlight problem
OK, there are 3 white fuses with Gold ends on the main board close to the white connector with wires that go to the power supply board, check and see what DCV do you have at both ends of those fuses with reference to the chassis GND when the TV is turned on.Leave a comment:
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Re: Vizio E470Vl no backlight problem
were these good enough pics,thanksLeave a comment:
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Re: Vizio E470Vl no backlight problem
here they are,sorry about thatAttached FilesLeave a comment:
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Re: Vizio E470Vl no backlight problem
I need to see the whole backside so I can see how all the boards are connected together.Leave a comment:
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Re: Vizio E470Vl no backlight problem
ok here it goesAttached FilesLeave a comment:
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Re: Vizio E470Vl no backlight problem
You need to upload good clear pictures of the whole backside of the TV so we can see all the boards, right now you do not have BL-ON (ON/OFF) signal from the main board to turn on the backlight circuits.
'On/Off .09'Leave a comment:
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Vizio E470Vl no backlight problem
can see image with flashlight but can get backlight to come on.
Here are the measurements i get from board #3647-0292-0150 (3J)
Dim 1.40
Lamp 0
On/Off .09
PS On 2.21
12v 12.20
12v 12.20
12v 12.20
SGND 0
SGND 0
SGND 0
SGND 0
+5VSB 5.09
+5VSB 5.09
+5VSB 5.09
any help is much appeciated,thanks
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EDITED: I thought my Vizio E470VL has +5VSB and no 12v on the PS board, but after plugging the cable back in and testing the pins on the Main board I realized that I do have 12V. I assume the 12V is turned on when the ON/OFF switch is pressed. The Vizio light in front does go from Standby Orange to White when ON. But, I still have no picture or sound. Test values of PS board are below.
+5VSB= +5.09
12V= +12.18
PS_ON= +2.25
I_ON/OFF= +3.27
LAMP= +3.18
DIM= +2.97
Any more testing I can do on Main board or is it just a replacement?... -
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The screen seems to blackout and stay black, but with a flashlight I can see the display.
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Assuming... -
Hi.
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