Re: dell E173Fpf burnt parts
Replaced C867 and C868 with nice blue 10nF 1kV ceramics, the surviving C867 didn't look the part. Replaced R852 with a 0.22 ohm 1W fusible. All o/k.
picturevalve
Member
Last Activity: 04-21-2016, 08:20 AM
Joined: 11-19-2010
Location: Wales
-
Re: Philips 190S LCD power problem
Forgot to say that NCP1203D60 current mode controller (7100) was also u/s.
All working again, would have been quicker to pay $20 for a new board.
But not so much fun.Leave a comment:
-
Re: dell E173Fpf burnt parts
The 2209WA monitor has a similar arrangement with a bead in the pi not the resistor....Leave a comment:
-
Re: dell E173Fpf burnt parts
C867 R852 and C868 form a pi filter on the ht supply so C868 is connected from R852 to ground. As C867 is 10nF 1kV, I suspect C868 is of the order of 22nF 1kV....Leave a comment:
-
Re: dell E173Fpf burnt parts
Second image. I just wonder whether the "hot" side of the ceramic was touching the heatsink....Last edited by picturevalve; 04-18-2016, 10:07 AM.Leave a comment:
-
Re: dell E173Fpf burnt parts
Hi, my board has none of the damage suffered by the op. Just C868 and R852. It looks like R852 will be 0.21 ohm as the dell 2209wa monitor has just such a resistor in the ht as a fusible 1W resistor. In my board R856 is a 5.1 ohm not 15 ohm. Second jpg shows side of heatsink where C868 committed capricide....Last edited by picturevalve; 04-18-2016, 10:03 AM.Leave a comment:
-
Re: dell E173Fpf burnt parts
No, R861 is 47 ohm....Leave a comment:
-
Re: dell E173Fpf burnt parts
Looking at op jpeg, R852 looks like it could be 0.21 ohm?Leave a comment:
-
Re: dell E173Fpf burnt parts
I was given a faulty one of these a few years back but could not get any data that matched my board. Today I find this thread. My board has the mains fuse well blackened, R852 and C868 destroyed (totally) with a nice big scorch mark on the heatsink. The board is pristine and all caps read o/k. Does anyone have the values of the 2 components above?The resistor is in the +ve line from C854, some sort of surge limiter? and the cap is across the ht to ground after it.
With any luck it was just a cap. failure. In the op image they're the resistor...Leave a comment:
-
Re: Philips 190S LCD power problem
It's 2016, and I've got a dead one of these with the T50P050.00 psu. Found the service manual here :
Mosfet 7103 s/c, 15v zener 6105 s/c, resistors 3117, 3154 ,3118, 3155 all high (all originally R51 or 0.51 ohm on my board), all electrolytics high esr except for 1000u 25v caps for some reason but all changed to be sure. Waiting for delivery of first 3 items to, hopefully, complete repair.Leave a comment:
-
Re: Chieftec HPC-360-202 5vsb jumped to 6V!
I have one of these which has died, I've replaced all the caps reading high esr including c34, c36 and c37 in the 5vsb section. All o/k now except the 5vsb is low at 4.4v. Any pointers welcome as to likely problem? Mant thanks.Last edited by picturevalve; 05-22-2015, 06:56 AM.Leave a comment:
-
Hi Bob, I've tried the links with the 6D schematics but neither seems to work. Could you possibly email me the schematics? - [email]geoffreythomas@onetel.com[/email] Many thanks.Hi Bob, I've tried the links with th...] Many thanks.Hi Bob, I've tried the links with the 6D schematics but neither seems to work. Could you possibly email me the schematics? - [email]geoffreythomas@onetel.com[/email] Many thanks. -
Hi,
I've posted some info. confirming your R856 as 5.1 ohm, not 15 ohm on your E173FPf thread. Have you fixed it yet?
Best wishes,
Geoff. -
Re: Dell E173Fpf and burnt resis.
R856 on my board is marked 5R10 and measures 5.1 ohm. C856 I cannot measure properly as it seems to have a 10uF in parallel. HTH.Leave a comment:
-
Re: Dell E173Fpf and burnt resis.
If your board looks like this :
[url=http://www.e-techsiliconvalley.com/store/index.php?main_page=popup_image&pID=11197&zenid=433479c11e050bcecc8d4bcc434477c5]board[/url]
then R852 is a 0.2ohm 1w metal film
There are 2 ceramic high voltage caps between the centre heatsink and the 100uF 450V elect. the resistor directly above is the 0.2 ohm, if you have the same board.
I have an E173FPf monitor where the ceramic cap has ruptured and flashed to the heatsink earth taking out the 0.2 ohm and the 2A mains fuse. The...Last edited by picturevalve; 11-19-2010, 07:55 AM.Leave a comment:
No activity results to display
Leave a comment: