If this picture [URL="https://taobao.hooos.com/goods_jAvmwVBf0tJD2AM2mvHBB2tJte-yz622os6KVP0v27iD.html"]found on the web[/URL] can be trusted, XM5084-ADJ or equivalent should be correct.
STI3408B seems to be one more alternative. They all use the 0.6V ref. and have identical pinout.If this picture [URL="https://taobao.hooos.com/goods_jAvmwVBf0tJD2AM2mvHBB2tJte-yz622os6KVP0v27iD.html"]found on the web[/URL] can be trusted, XM5084-ADJ or equivalent should be correct.
STI3408B seems to be one more alternative. They all use the 0.6V ref. and have identical pinout.If
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
Need help to identify SOT23-5 step-down converter to 3.3V marking E16q9
Hello everybody,
I need to replace a shorted SOT23-5 step down converter in a consumer audio device marking E16q9. What I found out from the board layout and measurements:
Vin: 5,0V
Vout: 3,3V (connecting to all 3V3 inputs of a N32905U3DN)
Pin1: ? (perhaps enable)
Pin2: GND
Pin3: Vout - connected to 3µ3 coil
Pin4: Vin
Pin5: Feedback, voltage divider, two resistors connect Vout-Pin5-GND, 680k+133k
I searched many datasheets, but no one seemed to match according the surrounding components.
Best similar parts I found were...
-
Xiaomi Mi 11 Lite 5G Boardview
Anyone can provide a boardview (brd) file for this device?
Until now I only could find pdf version of schematic and board....
-
Re: Brother Maintenance Tools and repair help for QL-570
I did more measurements and found strange high voltage about 25V on the ON/OFF button connector (CN8) when it is unplugged. With the plugged connector this drops to the 2.5V mentioned before.
Unluckily my linked schematic doesn't show up.
Leave a comment:
-
Re: Brother Maintenance Tools and repair help for QL-570
Update:
When unplugged from mains power after some days I'm able to switch on normally. All functions are working for a short period (about one minute). After that the device seems to freeze.
I measure only about 2.5V on the connector for the ON/OFF button where the other buttons show 3.3V when upressed.
According to the service manual there are no components on the ON/OFF line, that could cause this behavior. R9 and R10 values measure ok....
Leave a comment:
-
Re: Asrock Z87 Extreme 4 Not powering on
RT8065ZQW (PU9) changed -> board back to life
I must mention, I also had to flash a good bios after this, like it had been corrupted from the dying regulator.
Leave a comment:
-
Brother Maintenance Tools and repair help for QL-570
Anyone can provide the software tools for Brother P-Touch QL-570?
According to the service manual there should exist
On the brother homepage I only can find autopoff.exe and a tool called ptsweep.exe.
I got the QL-570 as defective, but it powered up normal (voltages measured ok) with cutting and paper feed working until a paper roll and driver were installed on the connected pc.
The device now only shows a dim red LED light. Powering on/off doesn't work.
I'll do voltage measurements again to exclude an electrical/power supply problem....
-
Re: Asrock Z87 Extreme 4 Not powering on
I have the very same symptoms as dicky96 reported on an Asrock B85M-ITX.
After some measurements it looks like I get only about 0.35V on the PU9 chip for half a second the system tries to power up. It is the same RT8065ZQW as mentioned from anikin73.
The pin 8 (PGOOD) of this ic remains low.
RT8065ZQW datasheet:
[HTML]This pin is an open drain logic output
that is pulled to ground when the output voltage is not within
+/-12.5% of regulation point.[/HTML]
I will order the RT8065ZQW and...
Leave a comment:
-
Re: Repair Synology DS118 - fsbl fail - RAM already changed
No problem with erasing, flashing and verifying the content.
The flash chip itself (MX25L6433F) seems to be fine.
I wonder how I could measure the voltages of the RAM chips, if all are stable?
There are two unpopulated RAM places in DS118. Maybe I can check with an oscilloscope there?
[URL="https://semiconductor.samsung.com/resources/data-sheet/DS_K4A4G165WE_BC_I_Rev1_4-1.pdf"]I found the datasheet for RAM[/URL], but not for the "W27N 2227" device...Re: Repair
Leave a comment:
-
Re: Repair Synology DS118 - fsbl fail - RAM already changed
In my case only RTD1296 cpu commands are available. The console is connected via USB-TTL converter to the board.
So the fault must be in a very early stage. fsbl = "first stage boot loader"???
Edit: I managed to read the flash contents with a programmer. How to check if flash content/bin is valid?Last edited by DriversScrew; 05-15-2022, 04:51 AM.
Leave a comment:
-
Re: Repair Synology DS118 - fsbl fail - RAM already changed
Shouldn't there then be an error like
[CODE]SF: Detected MX25U6435F with page size 256 Bytes, erase size 64 KiB, total 8 MiB
*** Warning - bad CRC, using default environment
...
SF: Detected MX25U6435F with page size 256 Bytes, erase size 64 KiB, total 8 MiB
SF: 3014656 bytes @ 0x90000 Read: OK
SF: 4587520 bytes @ 0x370000 Read: OK
## Booting kernel from Legacy Image at 08000000 ...
Image Name: Linux-3.10.102...
Leave a comment:
-
Repair Synology DS118 - fsbl fail - RAM already changed
I've got a DS118 (Board Model name: HDR11L1) stuck at the very first stage of boot with console output:
[CODE]
C1:80000000
C2
?
C3h
hwsetting size: 000006DC
C4
f
5-5verify fsbl fail
0000003BC7
C1:80000000
C2
?uu3-1
[/CODE]
I found [URL="https://forum.banana-pi.org/t/rtd1296-failed-to-boot/12895"]this similar issue on the web[/URL] and changed both RAM BGAs on my board but without any change.
I successfully tested the synology RAM swapped to a standard SODIMM module....
-
Re: TNY27x thermal shutdown issues
Short update:
After replacing the TNY, the psu is running fine.
The new TNY279PN isn't warming up at all. ...
Leave a comment:
-
Re: TNY27x thermal shutdown issues
Found the TNY279PN faulty in a 580W bq atx power supply. Generating the 5VST. First checked all electrolytic caps and desoldered many other parts.
The power supply only works for about half a minute with all voltages ok. Then shutting down and after one more minute it is ready again.
Finally I had the chance to look at the ps with a thermal cam and could clearly see the TNY (half under heat sink) heating up until about 85°C. Then it shuts itself down and when cooled to around 50°C it comes back on...
I will look for...
Leave a comment:
No activity results to display
Show More
Leave a comment: