Re: Toshiba 50L1350UC not powering on
I ended up swapping the power supply board for a working one, probably pulled from another unit.
The new power supply lasted about six months before croaking.
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Re: Toshiba 50L1350UC not powering on
Cool. Thanks for the info. I'll check the resistors and read up on checking optos (never done that before).
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Re: Toshiba 50L1350UC not powering on
What could cause the AC Det to fail? Does it just detect whether or not AC is present or whether it is at the proper voltage and frequency?
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Re: Toshiba 50L1350UC not powering on
Okay, the values are thus:
PWM: 0V
5.1V: 5.1V
BL_On/Off: 0V
Power_TV: 0V
AC Detect: 0V
5.1V: 5.1V
GND: 0V
12V_LNB: 0V
GND: 0V
12V_AUD: 0V
GND: 0V
GND: 0V
12Vcc: 0V
12Vcc: 0V
12Vcc: 0V
I've included some (hopefully) better pictures.
Thanks for your help....Last edited by DasBub; 01-05-2017, 10:28 PM.
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Toshiba 50L1350UC not powering on
Hi folks.
I have a Toshiba 50L1350UC which almost never powers on. This situation started with it occasionally not powering on, then progressively got worse until the owner (my aunt) decided to just leave it on 24/7. Whenever she accidentally powered it off, she would continuously cycle its power bar and press the Power button again and again until it turned on. Eventually she gave up and it moved to my house.
I've already checked the standby voltage, and it's a solid 5.1V, as labeled on the board. I tried to check the bridge rectifier's output but I got a spark and...
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Dynex LCD TV, no backlight. Suspect transformer ohm readings
Hey guys. I have a cheap-as-chips Dynex 22" TV ( DX22LD150A11 ) that powers on, passes the flashlight test (image on dark screen), but with no backlighting.
The power supply board is a DPS-65TP-2 A and - after looking through the forum - I suspect the culprit is a transformer on the secondary side, T302, part number TMS94481CT.
[URL="http://www.lcdparts.net/TransformerDetail3D.aspx?ProductID=4010"]This page[/URL] lists the resistances as 0.2ohms primary and 960ohms secondary. The values I've measured are [S1-S2] 267Kohms and [S3-S4] 980ohms.
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Re: New Members - please post your introductions here
Howdy folks. I'm a long-time tinkerer and troubleshooter wanting to learn the ways of electronics repair (beyond the level of "buy a new one"). I have a pile of interesting stuff and a decent multimeter... now all I need is knowledge Thanks.
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