Dell 2407WFPb Monitor - Bad Cap

[arber]

Re: Dell 2407WFPb Monitor - Bad Cap

plzz tell the number of this little thing i cant see in this foto becaus this is so little plzz tell me that the number

[arber]

Re: Dell 2407WFPb Monitor - plzz somebady tell the number of this thing i cant read

[metulec]

Re: Dell 2407WFPb Monitor - Bad Cap

Hello to all community,

I also have a 2405 with a failed C605 and all the company of MOSFET and IC that it brought down. In this thread it was mentioned only ZD601 (15V). Even if the remaining Zeners should not be affected by the cap failure, I measured ZD602 and ZD603. Both are 24V, if anybody wanted to know.

Cheers

[LiPeng]

Re: Dell 2407WFPb Monitor - Bad Cap

Just a quick update: After have exchanged all components listed in #448 of this thread, the monitor powerd up! I'm writting this update with the newly repaied monitor. Totally amazing .

Ps. did change all caps on the power supply board, but not on the CCFL driver board.

[LiPeng]

Re: Dell 2407WFPb Monitor - Bad Cap

Yes, only the revision no. is A02: ie. 48.L1E02.A02

[budm]

Re: Dell 2407WFPb Monitor - Bad Cap

@lipeng, please re-post in 2405 thread or make a new one.
Is this the same board you are working on?
http://s807.photobucket.com/user/bud...?sort=3&page=1

[LiPeng]

Re: Dell 2407WFPb Monitor - Bad Cap

I have a 7-8 yrs. old Dell 2405fpw monitor and also had problem with the power supply board. So far I changed the following components, but when put it back and tried to switch it on, nothing happens:

C605 / 450TXW100MEFC18X35 CAPACITOR, RADIAL, (450V, 100UF, since I couldn't get a 120 uF at the moment)
Q651 / STP10NK60ZFP MOSFET, N, TO-220FP
IC651 / L6561D PFC 90UA START + DISABLE, SMD, 6561
R670 / PNP1WVJT-52-0R22 RESISTOR, 1W, 5%, 0R22
F601 / 0001.2510 FUSE, ANTISURGE, CERAMIC, 4A
C622 / EEUFC2A1R0 CAPACITOR, RADIAL, 100V, 1UF

The fuse kept intact, but no indicates for any life of any sort, what could I else do?

[ehorschman]

Re: Dell 2407WFPb Monitor - Bad Cap

Success reviving Benq FP241W

Thanks to the posts in this forum, I was able to fix my Benq FP241W that wasn't powering on and saved a few hundred dollars on a replacement. The Benq FP241W uses the same power supply board as the Dell 2407 and I noticed brown leakage at the positive terminal of the 120uF 450V capacitor (C605) and the ceramic coating on R670 was flaked off. I replaced the components listed by elvena, micdis and others. I didn't test the components to see what had actually failed - I just replaced everything listed below.

Component ID / Replacement Part / Digikey Part Number

C605 / Rubycon 450QXW120MEFC18X31.5 / 1189-1377-ND
Q651 / STMICROELECTRONICS - STP10NK60ZFP / 497-5892-5-ND
IC651 / STMICROELECTRONICS L6561D013TR / 497-4582-1-ND
R669 / Panasonic ERA-8AEB1021V / P1.02KBCCT-ND
ZD601 / Vishay TZMC15-GS08 / TZMC15-GS08CT-ND
IC601 / ON Semiconductor NCP1200D100R2G / NCP1200D100R2GOSCT-ND
R670 / Yageo PNP300JR-73-0R22 / 0.22AECT-ND
F601 / LittleFuse 0234004.MXP / F2692-ND + F1504-ND fuse holder
C622 / Nichicon UPS2A010MDD1TD / 493-5378-1-ND
Q654 / Fairchild Semiconductor MMBT3906 / MMBT3906FSCT-ND
D655 / Diodes Inc. 1N4148W-7-F / 1N4148W-FDICT-ND

As a precaution, I replaced these other caps on the power supply board:

C711-C715 / Panasonic EEU-FM1V471 / P12415-ND

and these three caps on the CCFL driver board:

? / Nichicon UHE1V221MPD6 / 493-1579-ND

I'd never de-soldered/soldered surface mount components before, so I practiced for a while using a dead board. I found I had to be careful when de-soldering ICs and SMT transistors to avoid tearing off the contact pads.

[Nickkip]

Re: Dell 2407WFPb Monitor - Bad Cap

hi got that thanks! do you know what type of diode is used? as there is no info on them. also that link was for the 2407 if I get service diagram for that are they about the same?

thanks

[jetadm123]

Re: Dell 2407WFPb Monitor - Bad Cap

You can try this link, post #8

https://www.badcaps.net/forum/showth...WFPb+schematic

[Nickkip]

Re: Dell 2407WFPb Monitor - Bad Cap

Hi does anyone have a service manual or a schematic for this board I can I have please

[Nickkip]

Re: Dell 2407WFPb Monitor - Bad Cap

seems ok

[budm]

Re: Dell 2407WFPb Monitor - Bad Cap

Put your meter in diode mode and check to see if it is still tested out like Diode.
http://s807.photobucket.com/user/bud...?sort=3&page=1

[Nickkip]

Re: Dell 2407WFPb Monitor - Bad Cap

Just been looking and looks like D603 the Glass/plastic on the SMC most is missing.

[Nickkip]

Re: Dell 2407WFPb Monitor - Bad Cap

http://youtu.be/ICJcvwSdgIQ

[Nickkip]

Re: Dell 2407WFPb Monitor - Bad Cap

here is a photo on other side

[Nickkip]

Re: Dell 2407WFPb Monitor - Bad Cap

Have uploaded the video to Youtube had no one to hold the camera for me will upload a better one tomorrow but think you may be able to get the idea. all the top right is short

http://youtu.be/ICJcvwSdgIQ

[Nickkip]

Re: Dell 2407WFPb Monitor - Bad Cap

Hi Thanks for your replay I will post a video up to youtube bit later on see if I can show what im getting as where the top of the board by r615 that part of the board is all going to grown.

[budm]

Re: Dell 2407WFPb Monitor - Bad Cap

Please post good clear pictures of YOUR board. R615 is 0.22 Ohm resistor, so what do you read on your meter. Pictures of C611, ZD601?

[Nickkip]

Re: Dell 2407WFPb Monitor - Bad Cap

Hi Guys I have a problem with the same power supply 48.L1E02.A03 its reading short on a few places im still new to this. Would be great if anyone could point me in the right direction

R615 is short

C 611 is short

ZD601 is short