Junsi iCharger 458Duo repair

EgOPhil

New Member

Join Date: Apr 2024

Posts: 2

Country: Germany
#1

Junsi iCharger 458Duo repair

05-14-2025, 03:04 AM

Hello everyone,

the IC labeled “D4W28” gets hot after a few seconds and the iCharger stays off. I have measured the components around the ICs “AL114” and “D4W28” and they are all OK.
However, I have the problem that I can't find the ICs and therefore have no datasheet. Do any of you have the datasheet to hand? Also, do you know where I can buy these ICs?

Thank you in advance,

Phil

1 Photo
Tags: None
m1ch43lzm

Badcaps Veteran

Join Date: Mar 2019

Posts: 418

Country: Peru
#2

05-14-2025, 09:09 PM

Hi, i only found info on the AL*** IC, it's either FP6291 or SD6271, likely clones of each other, its a step-up DC-DC boost converter in SOT23-6 package
As for the D4W28, couldn't find anything that looks like it by searching for D4 or D4W
Attached Files

1810182113_Feeling-Tech-FP6291LR-G1_C18701.pdf (389.8 KB, 5 views)
Comment

Previous template Next

Lenovo Thinkpad P72 EP720 NM-B723 MB - Power disabled within 2 seconds after plugging the charger

by Mita99

Hi,

Try to repair a Thinkpad P72 EP720 NM-B723 MB with I7-8850H processor and N18E-Q1-KB-A1 (P3200) GPU with 6GB memory. Unfortunately there is noinfo what happened to the laptop. I got it disassembled with parts missing, like keyboard, battery.

Unfortunately I have no schematic available for me (requested in the sub porum) but got the boardview file.

Symptom: after connecting to the charger the power led light up for one-two second and switch off. After a couple secons the power led light up for half a second and switch off. No battery, no IO board, no...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
04-27-2025, 07:20 PM
SMEG induction cooker error EA on both left hand side cooktops

by Gjackson

Hi all,

I have a SMEG cooktop with a EGO 72.08041.002 power board. The two left hand side cooktops started to slowly fail, sometimes stopping with an EA error (Power board failure according to the manual) after a couple minutes boiling some water and eventually they completely failed and now get an EA error on both of them at all times. Visual inspection of the board went over ok, I checked the IGBT's and rectifiers and they seem fine, what should I look at next as this is the first time I'm fixing an induction cooker, I'm suspecting capacitors in this case, Which ones should I look...
- Channel: Troubleshooting Appliances and other Household Electronic Stuff
07-09-2024, 01:46 PM
Vaillant 242 Gas Water heater. Shortcut in board anc compatibility with model 282

by edugimeno

Hi!!
Yesterday I was installing a new Wifi thermostat for my domestic gas water heater model Vaillant 242/2-3, and accidentlly one wire from mains touched one wire from the thermostat output contacts. This shut off the heater so I finished installing the thermostat and then went out to check the heater

I found one fuse blown (T2 250V). Replaced it with another equivalent fuse and it blew right away. I measured L-N in mains input and I sometimes got 4K but sometimes, not sure why, I got 100 Ohm...
At a certain point, moving stuff around, I put all wires back in place and...
- Channel: Troubleshooting Appliances and other Household Electronic Stuff
03-24-2024, 02:31 PM
Sony PS4 slim CUH-2216A power supply ADP-160FR not working after short in PFC

by modtool

Dear forum members,
I'm working on this power supply for ps4 slim, that behaves in a similar manner as other cases but I can't find a way to solve the problem.
When it came to me, externally the ps4 had standby voltage, clicking the disc eject button made the triple beep (without disc inside) and cliking on the power button made the blue power light turn on and then all turned off within 1 second.
When I opened it up, I found these components shorted:
Q6 24N60M2
IC41 1612A (not really shorted but had a hole on it and all pins measured open circuit but the 9th...
- Channel: Troubleshooting Game Consoles & Other Weird Devices
05-31-2023, 08:09 AM
Hp 250 g6 burnt IC on the motherboard - is labeled 3h=5g

by Samuel Vincze

Hello, my HP doesn't start, and I found a burnt IC on the motherboard. I can't read the full description due to the damage. The component is labeled 3h=5g. Could someone please advise me where I could buy the component or its suitable replacement? Thank you. It's marked as PUG8 on the motherboard.
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
02-16-2024, 05:53 AM
Loading...
No more items.

Junsi iCharger 458Duo repair

Junsi iCharger 458Duo repair

Comment

Related Topics