Initially had standby 5v but not 12v or anything else. Checked a couple of caps and found ESR of 0 - so just replaced them all. Now have the following at the power board: Pins 1&2=6v, 4&5=12v, 7=20v, 9=2.3v, 10=3.3v, 11=6v, 12=3.3v.
Photos are power supply - input board - schematic of connection PS to input. Help - where do I go next?...
trwilson70
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Last Activity: 01-31-2023, 01:30 PM
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Panasonic TC-L32C22 Blinking Red
Last edited by trwilson70; 03-29-2015, 08:45 PM. -
Re: Vizio E320-A0
To finish up & learn more. This unit had been dropped - when I took up the LED's and the reflector, the underlying panel had a broken corner, I glued as best as possible. Still not sure why I got 19V the first time I checked. When I re-traced my steps - I had checked the LED connections and found the connection between the top and bottom not all the way on. I thought about testing at the top LED, but it made handling the live boards rather clumsy - that's when I disconnected at the main board and read 19V. When I rechecked I had the LED's connected - read 31v...Last edited by trwilson70; 03-27-2015, 12:16 PM. -
Re: Vizio E320-A0
OK - put unit back together - unplugged LED - reads 19.2 volts on main board?
Revision = went back to inspect and try to figure how I came up with 19v and this time I had 31.3 volts and the LEDs lit up!Last edited by trwilson70; 03-13-2015, 06:14 PM.Leave a comment:
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Re: Vizio E320-A0
Attached is photo of the LED's in reflector. Looks like it is wired in series - pulled reflector back to look at wiring. Power from main board goes to connector at upper left, the two connectors on the right are two wire conductor from top to bottom LED. At some point I will have to remove the reflector and get LED part numbers - when looking, it seems this model uses a variety of different LED configurations.
I should be able to check strips with external power. If one strip is bad - neither would light? Would they light on 12V, just dimmer? Thanks...Leave a comment:
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Re: Vizio E320-A0
Attached are photos of the back of the main board and the entire back of the TV.
Looking at the main board, from lower left hand moving clockwise, 4 wires-power from the PS, 2 wires out to LED's, 6 wires to IR and power light, ribbon to Tcon, 4 wires to speakers, 4 wires to on/off+controls. Had it apart, there are 2 stips of LEDs with 5 LED's per strip....Leave a comment:
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Re: Vizio E320-A0
Thank you nicholas1110,
This is the first time I have encountered an LED TV - so it is a learning curve. I figured out where the output for the LED's was on the main board - and it appears to be delivering 24V DC, I am assuming that is the correct voltage. If the LED's are bad - would you not get sound? or is there a circuit that shuts things down upon sensing bad LED's?
ThanksLast edited by trwilson70; 03-10-2015, 07:29 PM.Leave a comment:
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Re: Vizio E320-A0
Replacement main board arrived today - I popped it in anticipating that things would work - obviously not!
Same symptoms - hit the start button, white light comes on near power indicator, then slowly fades out.
Attached is a photo of the main board, sorry, will add the back of the board later - batteries ran out on the camera and I needed to get back to work.
Thanks....Leave a comment:
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Re: Vizio E320-A0
At this point, after verifying that voltage is OK, I ordered a main board. They seem to have a problem with the eeprom - cost $20, too cheap to not just replace. Will post when board gets here, keeping fingers crossed.Leave a comment:
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Re: Vizio E320-A0
When you hit the power button a small white LED comes on for about 5-6 seconds, then slowly fades. No picture, no sound. In looking at replacement components I noticed there are several different power supplies and main boards for the E320-A0.Leave a comment:
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Vizio E320-A0
Hate to start a new thread - but this is a different power supply than the others. When power button is pushed, white light comes on, nothing else - then it slowly fades out. I checked output = 19.5volts, where others read 24V. Have 5v standby at power switch. Other boards for this model had 35v caps near output - this one has 25v caps? Does anyone know what the voltage should be for this board? Thanks... -
Re: Sharp LC-42SV49U No Power
Not as clear as I had hoped, done with my phone because that is what I have handy.
I don't see anything real obvious - just now checking a few more things....Leave a comment:
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Re: Sharp LC-42SV49U No Power
OK - finally had time to get back to work on this.
budm - doh, you are so right. I saw that, looked at component on other side, looked up number and it said it was a relay - so perhaps the jumper was needed - further reading called it a capacitor?? What are they, there are 2! Someone else added the jumper - was I set up to fail?
Was able to get another power supply and now have 5v out to input board - but still no indication of power on. Help with next step? Will get photos of input board later today - haven't traced where the 5v goes....Leave a comment:
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Re: Sharp LC-42SV49U No Power
OK - jumpered across two fuses - installed a couple of 5a slow blow on the other 2. Touched with 120v and fuses immediately blew.Leave a comment:
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Re: Sharp LC-42SV49U No Power
I don't know the history of it - the back had been off, the PS had some screws missing. With the fuses bad on the input, I wondered about a power surge - seems odd that all four fuses would be out and yet nothing else on the board appears smoked. What I am trying to decide is how much time and $ to put into it. Haven't looked at input board yet to see if there is damage there.Leave a comment:
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Re: Sharp LC-42SV49U No Power
No DC, 4 fuses on input line are all bad, so no AC on the primary side.Leave a comment:
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Sharp LC-42SV49U No Power
Received yesterday and haven't spent much time on it. Near power input are 4 fuses - all are blown. Caps seem to be OK - my Blue ESR has a weak battery, too many read 000. Will check later with meter for direct shorts. Measured fuses with ohmeter and then hooked 120v - no power. Attached two shots of front of power supply and the back. Have not looked at input main board. Ideas?... -
Re: Asus k8v-x se
Quick update - the cooling fan on the PS I used to test started to get noisy - when I opened it had bloated caps. Opened the original PS - recapped and things seemed to work. But lately system has been going blank - or locking up in windows - can only reboot. Next step is to recap MB. Thought perhaps it could be graphics card or cpu overheat - but seem to be cool (with extra fan) - ran memtest and a graphics mem test, showed no problems. Voltages are 12v=12.35, 5v=5.29, 3.3v runs about 3.26, 1.5v=1.55 - all according to Asusprobe.Leave a comment:
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Re: Asus k8v-x se
Finally got time to work on this problem. Swapped power supplies - didn't get a blue screen this time - but windows didn't recognize that there was a drive. six caps near cpu are rubycon MBZ's - 14 KZG - 5 TMZ, plus couple of little ones. Testing with blue esr meter - a lot of them measured 0 - just a few measured .02/.03 - is this because they are in circuit or were they all that bad? Noted that some started out at .05/.06 then slowly ticked down to 0. Thanks, TR...Leave a comment:
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Re: Asus k8v-x se
I'll get some photos up later, have to work right now. I didn't test the PSU, will do that too. Forgot to add - I did run memtest from bootable CD - memory checked fine.Leave a comment:
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Asus k8v-x se
Asus k8v-x se This has been a good board - but suddenly got BSOD while trying to install service pack. Several attempts to reload OS on SATA drive resulted in same BSOD - after XP appeared to load the start files on drive - reboot, Blue screen. Then I tried an older IDE drive - same result. Tried recovery console, fixmbr, fixboot - same result. Checked both drives on other PC's - OS loads normal. The CD-ROM's seem to work. Checked both drive with Seatools - passed 100%. Figuring the HD controller is bad, not reading the drive - could this be from caps? Will try to take time tonight to pull board...
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