Identification of SOT89-5 component in keyboard – key line control, 5 pieces on the PCB

This topic has been answered.

splash221

New Member

Join Date: Oct 2024

Posts: 2

Country: Poland
#1

Identification of SOT89-5 component in keyboard – key line control, 5 pieces on the PCB

10-03-2025, 11:35 AM

Good morning,

Please help me identify an electronic component. The component is in an SOT89-5 package with leads as shown in the photo. It is used on a keyboard board and controls the operation of a specific key row. There are five identical components on the PCB, and whenever I swap one with another, the corresponding key row stops working — so I conclude the component is faulty.

The keyboard is a SteelSeries Apex Pro (US). I cannot find a boardview or schematic online. I have already searched AllTransistors, AllDatasheet, etc., and found several candidate types (voltage regulators with control pins, multiplexers), but their pinouts do not match.

Thank you in advance for your help.

Regards,

1 Photo
Tags: None
Answer selected by splash221 at 11-03-2025, 05:07 AM.
lotas

Badcaps Legend

Join Date: Jan 2016

Posts: 4881

Country: Russia
10-04-2025, 04:26 AM

AIC1748AH-33GX5
Selected Answer
Comment
LaPCon_IT

Senior Member

Join Date: Sep 2022

Posts: 82

Country: Malta
#2

10-04-2025, 01:40 AM

If U12 works, post resistance and voltage of every pin.
Comment
lotas

Badcaps Legend

Join Date: Jan 2016

Posts: 4881

Country: Russia
#3

10-04-2025, 04:26 AM

AIC1748AH-33GX5
Selected Answer
Comment

Previous template Next

ps/2 port keyboard dead ? p5ql pro / ethernet cable light

by playit

my system is p5ql pro asus mobo , logitech keyboard ps2 keyboard (more than 10 years) .
my place use to get some power drip for a second ,at that time , pc shuts and restarts itself , it dint cause any problem till now , once or twice i noticed , i am not sure if it was exactly at power drip time or normal time - both keyboard and ethernet lan stopped working , the keyboard would lose power i mean led lights-num lock caps lock would not stay on , no light at etherbet cable too..then i would restart the pc - then its all good .

few years back ps2 mouse stopped working, but ps2...
- Channel: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
12-23-2024, 06:05 AM
HP ProBook 450 G5 + Essential 15.6-inch Case, Keyboard & Mouse Notebook 400 Specification for Upgrade or Repair

by Document Archive

This specification for the HP ProBook 450 G5 + Essential 15.6-inch Case, Keyboard & Mouse Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 450 G5 + Essential 15.6-inch Case, Keyboard & Mouse boardview and 450 G5 + Essential 15.6-inch Case, Keyboard & Mouse schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users...
- Channel: Laptop, Tablet, & Notebook Specifications
09-06-2024, 06:21 AM
HP ProBook 430 G5 + Essential 15.6-inch Case, Keyboard & Mouse Notebook 400 Specification for Upgrade or Repair

by Document Archive

This specification for the HP ProBook 430 G5 + Essential 15.6-inch Case, Keyboard & Mouse Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 430 G5 + Essential 15.6-inch Case, Keyboard & Mouse boardview and 430 G5 + Essential 15.6-inch Case, Keyboard & Mouse schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users...
- Channel: Laptop, Tablet, & Notebook Specifications
09-06-2024, 06:21 AM
HP ProBook 450 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse Notebook 400 Specification for Upgrade or Repair

by Document Archive

This specification for the HP ProBook 450 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 450 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse boardview and 450 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you...
- Channel: Laptop, Tablet, & Notebook Specifications
09-06-2024, 06:21 AM
HP ProBook 430 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse Notebook 400 Specification for Upgrade or Repair

by Document Archive

This specification for the HP ProBook 430 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 430 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse boardview and 430 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you...
- Channel: Laptop, Tablet, & Notebook Specifications
09-06-2024, 06:21 AM
Loading...
No more items.

Identification of SOT89-5 component in keyboard – key line control, 5 pieces on the PCB

Identification of SOT89-5 component in keyboard – key line control, 5 pieces on the PCB

Comment

Comment

Comment

Related Topics