Monday, June 20, 2011

Philips 37MF321D/37, 37MF331D/37, 715T2056-1 Power Supply Repair



We have been receiving quite a few 715T2056-1 power supplies for repair from Philips 37MF321D/37 and 37MF331D/37 LCD TVs. The failure symptom is typically that the green standby/power indicator led blinks constantly and the TV will not turn on. The most common reason this particular power suppy fails is the 2200uF 25V capacitor at location 2074 has puffed and vented or has a significantly high ESR, some of the other electrolytic filter capacitors on the secondary side of the power supply may have a high ESR as well. The 9.1V 0.5W zener diode(BZX79C9V1 is used for replacement) at location 6079 is commonly shorted, but may also be open as well. The SMD 2.2 ohm 0.125W resistor at location 3045 has opened and is usually burned often damaging the copper trace on the bottom of the PCB. Parts are available from http://www.mouser.com/. If you have any questions regarding this repair or any other electronics related questions please feel free to email me john@preher-tech.com.











Professional Repair: If you are interested in having your power supply board repaired professionally then you may be interested in our mail in repair services. We can do the repair on this particular power supply for $50 plus the cost of return shipping and handling. Click here to see our mail in repair service page. You can also email contactus@preher-tech.com for more information.


Remember to visit http://www.preher-tech.com

Sunday, June 19, 2011

HPT4234, HPT4254,HPT4264, BN44-00161A and BN00162A power supplies repaired



If you have a Samsung HPT4234, HPT4254 or HPT4264 that does not turn on and only clicks or intermittently shuts down and starts clicking and you are looking for information on how to repair the power supply, see our post on how to repair the HPT4254 power supply which also applies to the HPT4234 and HPT4264 power supplies by clicking here.

HPT4254X/XAA, BN44-00161A Professional Repair:
If you are interested in having a BN44-00161A, BN44-00162A or any other power supply repaired professionally then you may be interested in our mail in repair services. We can do the repair on BN44-00161A and BN44-00162A power supplies for $50 plus the cost of return shipping and handling. Click here to see our mail in repair service page.


HPT4254X/XAA, BN44-00161A Repair Kits:
Repair kits for the BN44-00161A and BN44-00162A power supply available from Preher-Tech.
Click here to visit our parts kits sales page.

Take care and remember to visit http://www.preher-tech.com

Wednesday, June 8, 2011

Samsung HPT5044 (HPT5044X/XAA) BN44-00162A power supply repaired.

HPT4254X/XAA, BN44-00162A Professional Repair:
If you are interested in having a BN44-00161A, BN44-00162A or any other power supply repaired professionally then you may be interested in our mail in repair services. We can do the repair on BN44-00161A and BN44-00162A power supplies for $50 plus the cost of return shipping and handling. Click here to see our mail in repair service page.


HPT4254X/XAA, BN44-00162A Repair Kits:
Repair kits for the BN44-00161A and BN44-00162A power supply available from Preher-Tech.
Click here to visit our parts kits sales page.

Samsung HPT5044 (HPT5044X/XAA)BN44-00162A power supply repaired.
This repair was basically a very similar repair to one we often do on the HPT4254, BN44-00161A power supplies, but we wanted to give this one it's own post so that people searching for info on the HPT5044 with the failure of no power only clicking when attempting to turn the TV on or also intermittent power and clicking, would be able to easily find this info when searching online. The HPT4244 power supplies that we have been receiving for repair come in with an open fuse at location F803, shorted MOSFETs at locations QS801 and QS802 and open SMD dual package diodes at locations DS801 and DS802. QS801 and QS802 are both AV218N50 MOSFETs, but we substitute with FDA18N50 MOSFETs. F803 is an 8A 250V time delay/slow blow fuse. DS801 and DS802 are both 1SS184T5LFT, UFR dual package common cathode SMD diodes. All parts are available from http://www.mouser.com/.








Click here to read the repair info on the BN44-00161A power supply from the HPT4254 which is extremely similar. There is some good info in this post including other components you will want to test if MOSFETs QS801 and QS802 are not shored or F803 is not open as these boards have multiple failures that can happen.


HPT4254X/XAA, BN44-00162A Professional Repair:
If you are interested in having a BN44-00161A, BN44-00162A or any other power supply repaired professionally then you may be interested in our mail in repair services. We can do the repair on BN44-00161A and BN44-00162A power supplies for $50 plus the cost of return shipping and handling. Click here to see our mail in repair service page.


HPT4254X/XAA, BN44-00162A Repair Kits:
Repair kits for the BN44-00161A and BN44-00162A power supply available from Preher-Tech.
Click here to visit our parts kits sales page.


Remember to visit http://www.preher-tech.com.