Philips Bdl4231 Lcd Tv Power Supply Board Capacitor Diode Replacement Repair Guide

Difficulty

Moderate

Steps

4

Time Required

                          1 hour            

Sections

1

• Power Supply Board Capacitor & Diodes
• 4 steps

Flags

2

In Progress

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Introduction

I inspected the power supply board and saw that the largest four capacitors were all bulging on the top and leaking. There were also burn marks on both sides of the PCB where the largest diodes are location.

I found a shopjimmy.com repair kit for the board since I couldn’t find a replacement board for less on eBay or elsewhere online.

I ordered the kit and found that there wasn’t the C955 2200uF 16V capacitor and the D924 diode included with the kit… though the support staff at shopjimmy.com referenced where I could purchase the C955 capacitor and verified I can use my capacitors that almost total that amount in parallel as I was thinking.

I replaced just the three capacitors C952, C953 & C954 and two diodes ZD902 and ZD904 and now the TV is working, albeit with a high pitch “hissing like noise” so I figured the other C955 capacitor since bulging needs to be replaced still along with the ZD906 diode next to the D924 diode.

ZD906 diode as well as another diode and some other capacitors came with the kit. I’ll update this once I determine if I need to replace the D924 diode since that area does look a little burnt.

What you need

Step 1

              Remove Power Supply               

• Remove the 16 back cover screws.
• Remove the six power supply board screws.
• Remove the one power supply board 120V connector screw.
• If needed remove the VESA mount 5 screws and loosen the other side 5 screws to position the brackets so the power supply board can be removed.

Remove the 16 back cover screws.

Remove the six power supply board screws.

Remove the one power supply board 120V connector screw.

If needed remove the VESA mount 5 screws and loosen the other side 5 screws to position the brackets so the power supply board can be removed.

1024

Step 2

              Replace Power Supply or proceed to next step.               

• Remove the connectors to the power supply board, i.e. 120V connector and the three other connectors being careful to note placement of the two connectors on the left side that are close to each other.
• Replace power supply following the previous instructions in reverse.

Remove the connectors to the power supply board, i.e. 120V connector and the three other connectors being careful to note placement of the two connectors on the left side that are close to each other.

Replace power supply following the previous instructions in reverse.

Step 3

              Desolder faulty components               

• Remove the connectors to the power supply board, i.e. 120V connector and the three other connectors being careful to note placement of the two connectors on the left side that are close to each other.
• Remove the power supply board and bring to the location to be desoldered.
• Desolder capacitors using the soldering iron and some flux and solder.
• Desolder diodes using the soldering iron and some flux and solder.

Remove the power supply board and bring to the location to be desoldered.

Desolder capacitors using the soldering iron and some flux and solder.

Desolder diodes using the soldering iron and some flux and solder.

Step 4

              Solder in new components               

• Clean PCB trace locations with solder wick and isopropyl alcohol or cleaner. Solder new solder in location leaving hole still so components can be inserted.
• Carefully noting polarity of the capacitor, place correct new capacitor(s) in PCB location(s).
• Carefully noting polarity of the diode, place correct new diode(s) in PCB location(s).
• Solder the components in place using flux and solder.
• Follow step 2 in reverse to replace board, brackets if applicable and back cover.

Clean PCB trace locations with solder wick and isopropyl alcohol or cleaner. Solder new solder in location leaving hole still so components can be inserted.

Carefully noting polarity of the capacitor, place correct new capacitor(s) in PCB location(s).

Carefully noting polarity of the diode, place correct new diode(s) in PCB location(s).

Solder the components in place using flux and solder.

Follow step 2 in reverse to replace board, brackets if applicable and back cover.

To reassemble your device, follow these instructions in reverse order.

Cancel: I did not complete this guide.

                                                                                      One other person completed this guide.                                             

Attached Documents

• EC Declaration Of Conformity
• PDF - 68.02 kb
• View
• Specifications of the LCD monitor BDL4231C/00 | Philips
• PDF - 113.30 kb
• View

EC Declaration Of Conformity

PDF - 68.02 kb

Specifications of the LCD monitor BDL4231C/00 | Philips

PDF - 113.30 kb

Author

                                      with 1 other contributor 

                    James Finch                     

Member since: 10/14/2017

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