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Search: Posts Made By: lotas
Forum: Troubleshooting TVs and Video Sources Today, 11:18 AM
Replies: 13
Views: 374
Posted By lotas
Forum: Troubleshooting TVs and Video Sources Today, 04:42 AM
Replies: 23
Views: 1,911
Posted By lotas
Re: Samsung TV - no backlight, except when mainboard disconnected

And there are "they" (resistors) with low resistance and the multimeter will show a short circuit.
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 04:16 PM
Replies: 20
Views: 363
Posted By lotas
Re: Understanding air conditioner PSU logic

Check the IGBT transistor for a short circuit (and +15v power is important for it).
Forum: Troubleshooting TVs and Video Sources Yesterday, 01:59 PM
Replies: 128
Views: 8,218
Posted By lotas
Forum: Troubleshooting TVs and Video Sources Yesterday, 03:43 AM
Replies: 24
Views: 495
Posted By lotas
Re: Diagnose PS BN44-0467A

OZ9998BGN

https://aliexpress.ru/item/1005001792290156.html?sku_id=12000017589890855
Forum: Troubleshooting Appliances and other Household Electronic Stuff 11-27-2022, 08:24 AM
Replies: 2
Views: 396
Posted By lotas
Re: Need thermostat button combo for a Mr. Coffee fix, but cant find one

https://aliexpress.ru/item/1005003495955789.html?sku_id=12000026052779909

https://aliexpress.ru/item/33010055508.html?gatewayAdapt=glo2rus&sku_id=67135476647


KSD301-R
Forum: Troubleshooting Computer Displays 11-27-2022, 02:54 AM
Replies: 3
Views: 304
Posted By lotas
Forum: Troubleshooting TVs and Video Sources 11-26-2022, 02:45 PM
Replies: 24
Views: 462
Posted By lotas
Re: UN60D8000YFXZC Samsung - not powering ON

A powerful one is not needed there, since it only powers the micom, so 100mA is enough.
Forum: Troubleshooting TVs and Video Sources 11-26-2022, 01:25 PM
Replies: 12
Views: 200
Posted By lotas
Re: westinghouse tv dwm55f2y1 no display standby light on

No, you must unsolder it and read its contents (firmware) on the programmer and put this file with the firmware here. If you have a programmer RT809f (H), then you can not solder, but read through...
Forum: Troubleshooting TVs and Video Sources 11-26-2022, 11:54 AM
Replies: 12
Views: 200
Posted By lotas
Re: westinghouse tv dwm55f2y1 no display standby light on

Consider Firmware Dump as a programmer and post it here, I'll see if it works or not.
Forum: Troubleshooting TVs and Video Sources 11-26-2022, 11:10 AM
Replies: 12
Views: 200
Posted By lotas
Re: westinghouse tv dwm55f2y1 no display standby light on

And here are T-con and cables, if the TV does not go into operating mode, you most likely have lost the firmware or processor or dc / dc regulators on the motherboard.
Forum: Troubleshooting Power Supplies and Power Supply Design 11-25-2022, 04:18 PM
Replies: 20
Views: 363
Posted By lotas
Re: Understanding air conditioner PSU logic

Well, instead of an inductor, you can put a jumper for diagnostics, you won’t start some outdoor units until you briefly apply the “L” phase to the control “S” (signal, interconnect output).
Forum: Troubleshooting Power Supplies and Power Supply Design 11-25-2022, 03:48 PM
Replies: 20
Views: 363
Posted By lotas
Re: Understanding air conditioner PSU logic

Is the circuit more like an inverter, is the inductor connected to the board? Power passes through it to the diode bridge (sometimes there are two bridges) and a powerful IGBT transistor and to power...
Forum: Troubleshooting TVs and Video Sources 11-25-2022, 03:06 PM
Replies: 24
Views: 462
Posted By lotas
Re: UN60D8000YFXZC Samsung - not powering ON

IC203 (regulator 3.3v) - you can put S-1206B33-M3T1x or UM15333S (see pinout), if you replaced IC1204 (Weltrend WT61P805), then do not forget that it still needs to be programmed using a programmer.
Forum: Troubleshooting TVs and Video Sources 11-24-2022, 05:44 AM
Replies: 17
Views: 386
Posted By lotas
Re: TV Toshiba 46TL938 - backlight only/green power light

The above zip with firmware is for the programmer.
Forum: Troubleshooting Computer Displays 11-23-2022, 05:17 PM
Replies: 3
Views: 304
Posted By lotas
Re: aoc v22+ monitor bios dump

Do you have this AOC V22+ TFT22W90A 715G3121-1 motherboard?
Forum: Troubleshooting TVs and Video Sources 11-23-2022, 11:42 AM
Replies: 12
Views: 344
Posted By lotas
Re: un65tu7000fxza - Flashing Red Power Light

1. Buying a new panel is not profitable, since it costs about 80% of the cost of the TV itself + installation, it's easier to add and buy a new one.
2. Mostly problems in the panel itself, but there...
Forum: Troubleshooting TVs and Video Sources 11-22-2022, 04:36 PM
Replies: 128
Views: 8,218
Posted By lotas
Re: Samsung UN55MU6400FXZX

Thank you! I live far away, I'm glad it worked out.
Forum: Troubleshooting TVs and Video Sources 11-22-2022, 03:43 PM
Replies: 128
Views: 8,218
Posted By lotas
Forum: Troubleshooting TVs and Video Sources 11-22-2022, 02:57 PM
Replies: 12
Views: 344
Posted By lotas
Re: un65tu7000fxza - Flashing Red Power Light

I'm more inclined that the problem is in the panel itself, disconnect 1 cable and turn on the TV, see if it turns on or not, then do the same with 2 cables.
Forum: Troubleshooting Power Supplies and Power Supply Design 11-22-2022, 10:43 AM
Replies: 21
Views: 1,776
Posted By lotas
Re: Samsung Washing machine won't power on dc41-00189a

H1351L2B - this does not exist in nature, you need to look at the top line, this is "2QR2280Z"
Forum: Troubleshooting TVs and Video Sources 11-22-2022, 10:30 AM
Replies: 5
Views: 169
Posted By lotas
Re: Sharp LC-22CFF4011E

At the end 2 is the multiplier, ("1" is multiplied by 10, "2" is multiplied by 100...), 472 is 47 times 100 we get 4700 pF 2kV (2000v).
Forum: Troubleshooting TVs and Video Sources 11-22-2022, 07:48 AM
Replies: 5
Views: 169
Posted By lotas
Re: Sharp LC-22CFF4011E

QB101 should also be checked, if it is short, then UB101 and its harness probably suffered ...
Forum: Troubleshooting TVs and Video Sources 11-22-2022, 07:37 AM
Replies: 5
Views: 169
Posted By lotas
Re: Sharp LC-22CFF4011E

C - 472 2kv
R - 0.19 Om 5%
Forum: Troubleshooting TVs and Video Sources 11-21-2022, 07:18 PM
Replies: 24
Views: 462
Posted By lotas
Re: UN60D8000YFXZC Samsung - not powering ON

IC203 is a 3.3v dc converter that powers the micom, you can unsolder it (IC203) and you will also have a short circuit.
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