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Search: Posts Made By: lotas
Forum: Troubleshooting TVs and Video Sources Today, 04:45 AM
Replies: 13
Views: 85
Posted By lotas
Re: TCL 40S325-CA backlights, sound, no picture

90 Ohm is a normal resistance, it can be even lower, and 1 volt is the power supply of the processor core (there is always low resistance on this bus).
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 03:57 AM
Replies: 4
Views: 112
Posted By lotas
Re: What is this component pls ? (power Nikon D5)

Rather, these are completely different microcircuits that you are comparing, your native 8 pin. connected to a diode and an inductor, the other inductor is not visible.
Forum: Troubleshooting TVs and Video Sources Yesterday, 02:53 AM
Replies: 2
Views: 49
Posted By lotas
Re: Help with TV PSU LEKE LKP-PL034

1. Pwm - ob2273
2. Tl431
Forum: Troubleshooting Audio Equipment 06-29-2022, 09:49 AM
Replies: 11
Views: 99
Posted By lotas
Re: Sony CFS-B11 Radio cassette boom box

If there is a bolon with liquid for cleaning contacts, then you can puff to the contact groups of the switches and click them back and forth (contact may disappear in them).
Forum: Troubleshooting Audio Equipment 06-29-2022, 09:24 AM
Replies: 11
Views: 99
Posted By lotas
Re: Sony CFS-B11 Radio cassette boom box

Does the sound disappear on all functions "FM", "AM", "TAPE"?
Forum: Troubleshooting Audio Equipment 06-29-2022, 07:14 AM
Replies: 11
Views: 99
Posted By lotas
Re: Sony CFS-B11 Radio cassette boom box

Check the headphone jack, there is a contact lock for the speakers.
Forum: Troubleshooting TVs and Video Sources 06-22-2022, 12:37 AM
Replies: 1,269
Views: 420,757
Posted By lotas
Re: Eeprom dump thread!

Post your non-working dump here, I'll fix it.
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 06-21-2022, 05:20 AM
Replies: 5
Views: 196
Posted By lotas
Re: NEED DUMP FOR CANON LBP252dw

dump canon lbp 252dw 25c16

Quote from the forum: unfortunately this dump will not work on another same 252dw will fall into error E196-3001 (mismatch with eMMC Board)
Forum: Troubleshooting TVs and Video Sources 06-20-2022, 05:34 AM
Replies: 3
Views: 217
Posted By lotas
Re: PHILIPS 42PFL4606H/58 NO backlights

Checking the health of the PFC node is carried out by measuring the DC voltage on the capacitor of the mains rectifier. In operating mode, it should be about 380V, in standby mode, about 300V.
Forum: Troubleshooting TVs and Video Sources 06-19-2022, 02:28 PM
Replies: 25
Views: 326
Posted By lotas
Re: Sanyo DP55441 - No brightness control

The one on top of the MX25L3206
Forum: Troubleshooting TVs and Video Sources 06-19-2022, 12:59 PM
Replies: 25
Views: 326
Posted By lotas
Re: Sanyo DP55441 - No brightness control

For 16 bucks there is an already programmed flash, you need to find the same or an analogue (the size of the internal memory), they cost a penny.
...
Forum: Troubleshooting TVs and Video Sources 06-19-2022, 12:06 PM
Replies: 25
Views: 326
Posted By lotas
Re: Sanyo DP55441 - No brightness control

Wipe off the paint so that the full marking can be seen.
Forum: Troubleshooting TVs and Video Sources 06-19-2022, 11:51 AM
Replies: 25
Views: 326
Posted By lotas
Re: Sanyo DP55441 - No brightness control

On the other hand, we do not need 25xxx, it is rather responsible for scarlet (matrix settings).
Forum: Troubleshooting TVs and Video Sources 06-19-2022, 11:45 AM
Replies: 25
Views: 326
Posted By lotas
Re: Sanyo DP55441 - No brightness control

Maybe, maybe not. But rather it is not there.
Forum: Troubleshooting TVs and Video Sources 06-19-2022, 11:19 AM
Replies: 25
Views: 326
Posted By lotas
Re: Sanyo DP55441 - No brightness control

Usually, the eeprom or spi flash is marked with a dot or a strip of paint (indicating that the microcircuit has been programmed and tested).
Forum: Troubleshooting TVs and Video Sources 06-19-2022, 11:12 AM
Replies: 25
Views: 326
Posted By lotas
Re: Sanyo DP55441 - No brightness control

You can also look at the back of the board.
Forum: Troubleshooting TVs and Video Sources 06-19-2022, 10:56 AM
Replies: 25
Views: 326
Posted By lotas
Re: Sanyo DP55441 - No brightness control

If you see microcircuits on the board 24Cxx, then this is Eeprom, if there are 25Xxx, then this is Spi flash, but the markings are not visible in the photo, rather these are DC / DC converters in the...
Forum: Troubleshooting TVs and Video Sources 06-19-2022, 09:32 AM
Replies: 25
Views: 326
Posted By lotas
Re: Sanyo DP55441 - No brightness control

If you have a programmer, then you need to unsolder this spi flash (from the photo of your motherboard, I no longer saw other Eeprom and spi flash). Read the contents in your memory and save the...
Forum: Troubleshooting TVs and Video Sources 06-19-2022, 08:31 AM
Replies: 25
Views: 326
Posted By lotas
Re: Sanyo DP55441 - No brightness control

This is usually due to bad memory (Eeprom, Spi Flash).
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 06-19-2022, 03:22 AM
Replies: 15
Views: 462
Posted By lotas
Re: Ch341a programmer problem

Yes, you can use any for 128, MX25L12835FM2I-10G...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 06-18-2022, 05:25 PM
Replies: 15
Views: 462
Posted By lotas
Re: Ch341a programmer problem

64 Mb bits = 8 Megabyte (Mb).
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 06-18-2022, 12:56 PM
Replies: 15
Views: 462
Posted By lotas
Re: Ch341a programmer problem

To write a 16Mb file, you must have SPI Flash 25x(128) and your flash is only 8Mb wide.
Forum: Troubleshooting Power Supplies and Power Supply Design 06-18-2022, 12:42 PM
Replies: 30
Views: 712
Posted By lotas
Re: Learning with ATX CHIEFTEC 450W PSU

With soldering, everything seems to be fine here, in these places there are metal through sleeves (like rivets).
Forum: General Electronics Technical Discussion 06-17-2022, 06:21 PM
Replies: 2
Views: 128
Posted By lotas
Re: Looking for datasheet

Similar to ATECC508A-SSHDA-T.
Forum: Troubleshooting Computer Displays 06-17-2022, 11:23 AM
Replies: 6
Views: 180
Posted By lotas
Re: HP Z27s, cycling backlight off for half second, on for 5

It should warm up, because this is a Led driver, you rather have poor soldering (ring cracks) and because of this, contact disappears, solder suspicious places well.
Showing results 1 to 25 of 500

 
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