Re: Hitachi 58HK6100U black (blue tinge) screen
Took it off, and lost ground to quite a lot of the bypass caps, so looks like B is bridging link on these boards (for anyone that comes across this thread in the future)....
mace
Member
Last Activity: 04-16-2023, 02:53 PM
Joined: 08-21-2015
Location: Glasgow
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Re: Hitachi 58HK6100U black (blue tinge) screen
Yeah, wish I had an IR camera, that would be a good check, assuming that it's shorted enough to heat up visibly....Leave a comment:
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Re: Hitachi 58HK6100U black (blue tinge) screen
The only short to ground I've spotted so far was across B402, is that a bridging link?...Leave a comment:
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Re: Hitachi 58HK6100U black (blue tinge) screen
Thanks dskall,
Following measurements are with both halves of the screen connected to the t-con:
vin1: 12.1v
vin_12v1: 12.1v
vcc3v3: 3.28v
vcc1v8: 1.7v
vcc1.2v: 1.18v
vcom_l/r: started higher, slowly dropping, measured at 380mV after about 5 seconds.
vgl: 157mV
vgr: 18mV
Repeated measurements with either left or right hand ribbons disconnected:
vcom_l/r: 7.14v
vgl: -6.08v
vgr: 24.7vLeave a comment:
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Re: Hitachi 58HK6100U black (blue tinge) screen
Photo of tcon as requested. Let me know if you need any close ups?...Leave a comment:
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Re: Hitachi 58HK6100U black (blue tinge) screen
Very good 🙂...Leave a comment:
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Re: Hitachi 58HK6100U black (blue tinge) screen
Thanks dskall, I'll rewatch that video. Do you know of any schematics for these boards/test points I can check the voltages?Leave a comment:
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Hitachi 58HK6100U black (blue tinge) screen
Hi,
I have picked up a Hitachi 58HK6100U smart TV with a black/blue screen issue.
It's a vestel unit, using the MB230.
Visual inspection shows no obvious issues with caps, and diodes on PSU all look reasonable. I've not been able to check voltages, as I haven't spotted a schematic that matches the power supply, a 17ips72.
I've confirmed that the set boots successfully, albeit without picture. If I disconnect either the left or right ribbon cables, I get picture on the other side.
I noted a few bad lines at the bottom on... -
Re: New Members - please post your introductions here
Hi folks,
I've repaired a few things before, dead caps on computer motherboards and a plasma TV psu; same as same as I'm sure.
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