Re: Sony KDL-46V5100
Thanks for the feedback. Since the device is also lacking sound I thought that it was less likely to be the T_CON, but rather either a power issue or a MOBO issue....
dxucam
Member
Last Activity: 11-29-2022, 01:56 AM
Joined: 11-09-2022
Location: San Diego
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Re: Sony KDL-46V5100
How do I see where the voltage was lost?...Leave a comment:
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Re: Sony KDL-46V5100
The new multimeter gives much better readings, so I'm pretty confident of these. I tested all 5 CN6154 pins that are wired, in both standby and 'on' modes. Pin 4 seems pretty much dead.
Pin Standby On
1 0 mV* .5 V
2 148 mV 1.15 V
3 108 mV 1.9 V
4 0 mV 0 mV
* pin 1 reads a voltage after TV turned off, but it drains to zero....Leave a comment:
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Re: Sony KDL-46V5100
I did the 'hail Mary' software update, a good idea but it didn't seem to help.
Thanks for rec on using the resistance setting, I ended up getting a better meter that is auto-ranging and also has an audible continuity tone - which is much easier than trying to read the resistance on my old meter.
I tested all the fuses I could find, and they did have continuity, including the big one on the power board. Some of the FXXXX numbers have an arrow that pointed to largely empty areas on the board, for example the attached image for F5505....Leave a comment:
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Re: Sony KDL-46V5100
Thanks, will do... though my current multimeter doesn't have a 'continuity' test setting....Leave a comment:
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Re: Sony KDL-46V5100
Probably I just have a crap multimeter.
I tried the test, didn't see anything on the screen - but would have missed anything subtle, as there is daylight in the room. Also, with the cable disconnected the TV doesn't turn on (click, green LED), so I'm not surprised....Leave a comment:
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Re: Sony KDL-46V5100
They're all labelled correctly in the image that @redwire posted: [url]https://www.badcaps.net/forum/attachment.php?attachmentid=278993&d=1668048460[/url]Re: Sony KDL-46V5100<br /> <br /> ...68048460[/url]...Leave a comment:
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Re: Sony KDL-46V5100
To see what effect disconnecting the cable might have had, I left it installed and checked the voltages on the solder paths leading the destination rail on the logic board coming *from* CN6150 - labelled CN1003, circled in the picture - and indeed got different results.
1 - 3.9v
2 - 2.8v
3 - 3.9v
4 - 18v (steady)
5 - 18v
6-10 - 0v
11 - 15v
12 - 15v
13 - 15v...Leave a comment:
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Re: Sony KDL-46V5100
Thanks for the info, I'll look for any obvious damage but probably won't be swapping any capacitors,
To test the rails I unclipped the ribbon connectors, breaking the connection to the logic board. Given that, do the readings I got convince you that it is the power board (I2P) and *not* the logic board? Or does disconnecting the cable change what I should expect?...Leave a comment:
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Re: Sony KDL-46V5100
CN6150:
1 - 0v
2 - 2.9v
3 - 4.0v
4 - ~12v decaying; starts at a high value and drifts lower.
5 - ~12v decaying
6-13 - 0v
CN6151:
1 - 12v
2 - 12v
3 - 0v
4- 0v
CN6154:
1-4 - 0v
5 - 3.5v
Is the decaying voltage a sign of a leaky capacitor?...Leave a comment:
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Re: Sony KDL-46V5100
Images of the power and logic boards......Leave a comment:
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Re: Sony KDL-46V5100
Thanks for the response. There is a single click when the TV is turned on or off; once on there is no sound of any kind, nor any picture.
When the unit is off there is no standby light that I can see. Once turned on, there is a green LED light along the bottom of the frame towards the right of the unit as you face the screen.
I do have a multimeter to check things; was hoping to test the voltage arriving at the board from the power board, as well as the power going to the LCD controller (T-Con?), to verify where the issue is....Leave a comment:
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Re: Sony KDL-46V5100
I have the same model (Sony KDL-46V5100), same symptoms; click on power cycle, no video, no sound, and no backlight.
The logic board does appear to get the standby voltage, as evidence by a red flash in the optical audio input port.
I read somewhere that this was likely the main logic board, rather than the power supply board (IP2?). Logic board model number 1-879-239-13 / A1660699A
Any suggestions? Thanks!Leave a comment:
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Re: New Members - please post your introductions here
I'm from California USA, having some trouble with an older Sony TV; was referred to this forum, looks interesting.Leave a comment:
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