Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

PSU 450W is Troubleshooting

Status
Not open for further replies.
S

Strange Problem

Junior Member level 2
Joined
Jul 17, 2011
Messages
21
Helped
4
Reputation
8
Reaction score
4
Trophy points
1,283
Activity points
1,457
Hi,
I get a ATX PSU 450W for Repairing one of my customer . But This PSU have all parts OK . I am getting 5V PS-ON and 5VSB . The Power Supply is not running . But this PSU is Running - When I make short Pin 4 of TL494 with GND and this time I do not need to short PS-ON with Ground . Just Short Pin 4 with Ground and PSU is running Fine !!! What is Problem in the Control Section of this PSU ?? What have I to check in the control section ?? This Pin 4 is DTC ( Dead time Control ) of TL494 and it is showing 4.2V .

This Power supply have two IC - TL494 and LM339 .

Waiting for your quick reply ............
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top