Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Computer Displays
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 08-20-2010, 07:42 PM   #21
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.

Thats what i thought but didnt want to switch up the names. But as i look at it further that black line looks like a crack, im assuming that if it is it would cause some major problems correct?
testas86 is offline   Reply With Quote
Old 08-20-2010, 07:51 PM   #22
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.

so after googling the numbers on the transformer i cant seem to find anything to replace it.

tk 430k 101-821061
--02

thats all the markings i could find on the transformer.
testas86 is offline   Reply With Quote
Old 08-20-2010, 07:52 PM   #23
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.

sorry 430 1k**
testas86 is offline   Reply With Quote
Old 08-20-2010, 08:34 PM   #24
retiredcaps
Badcaps Veteran
 
Join Date: Apr 2010
City & State: Canada
Posts: 9,088
Default Re: WestingHouse L2210NW Will not power.

Quote:
Originally Posted by testas86 View Post
sorry 430 1k**
Can you tell it is cracked or does it look cracked?

Well, IF it is actually cracked, this is the closest replacement I can find.

http://lcdparts.net/TransformerDetai...ProductID=2775

It is not an exact replacement, but you can email them and ask if they have unlisted stock or something?

Your best bet may be to replace the shorted transistors, try the monitor and if it still fails, try to find a new transformer.
retiredcaps is offline   Reply With Quote
Old 08-20-2010, 08:41 PM   #25
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.

thanks! sorry im new this type of work. ive replaced 100's of caps but i have no clue how to find transistors and transformers ill remove those transistors asap
testas86 is offline   Reply With Quote
Old 08-20-2010, 08:54 PM   #26
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.






these are the two other transistors that i need to find. also where would i go to buy buys digikey? how do i look them up?
Attached Images
File Type: png trans1.png (1.20 MB, 141 views)
File Type: jpg trans2.jpg (125.9 KB, 136 views)
testas86 is offline   Reply With Quote
Old 08-20-2010, 09:18 PM   #27
retiredcaps
Badcaps Veteran
 
Join Date: Apr 2010
City & State: Canada
Posts: 9,088
Default Re: WestingHouse L2210NW Will not power.

Quote:
Originally Posted by testas86 View Post
these are the two other transistors that i need to find. also where would i go to buy buys digikey? how do i look them up?
Q is for transistor. D is for diode. These 2 are diodes (dual diodes).

To properly test them, do this. pin 2 is center pin.

Put your multimeter on diode test.

1) red on pin 1, black on pin 2. Record/report diode measurement.
2) black on pin 1, red on pin 2. Record/report diode measurement.
3) red on pin 3, black on pin 2. Record/report diode measurement.
4) black on pin 3, red on pin 2. Record/report diode measurement.

Do the same for the other diode.

Report measurements and we will tell you if they are bad or not.

Just to doublecheck, what ohm measurements did you get on the bad transisotr (k3113)?
retiredcaps is offline   Reply With Quote
Old 08-20-2010, 10:31 PM   #28
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.

ah well that really helps out alot! hahahaha ill get those measurements ASAP
testas86 is offline   Reply With Quote
Old 08-21-2010, 12:05 PM   #29
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.

k3114 measurements:

com pin 1 red pin 2= meter doesnt change from 1 also cycled through different ohms 2000k -200

com pin 1 red pin 3= meter set to 20kohm reads 10.02

com pin 2 red pin 3= meter builds up and doesnt cap out even on 2000k ohms


sbf1060ct measurements:

1) red on pin 1, black on pin 2. meter set to 20k and numbers seem to keeps going up with out stop
2) black on pin 1, red on pin 2. meter set to 20k and numbers seem to keeps going up with out stop
3) red on pin 3, black on pin 2. meter set to 20k and numbers seem to keeps going up with out stop
4) black on pin 3, red on pin 2. meter set to 20k and numbers seem to keeps going up with out stop


stpf1020ct measurements:

1) red on pin 1, black on pin 2. meter set to 20k and numbers seem to keeps going up with out stop
2) black on pin 1, red on pin 2. meter set to 20k and numbers seem to keeps going up with out stop
3) red on pin 3, black on pin 2. meter set to 20k and numbers seem to keeps going up with out stop
4) black on pin 3, red on pin 2. meter set to 20k and numbers seem to keeps going up with out stop
testas86 is offline   Reply With Quote
Old 08-21-2010, 12:40 PM   #30
momaka
Badcaps Veteran
 
momaka's Avatar
 
Join Date: May 2008
City & State: VA (NoVA)
My Country: U.S.A.
Line Voltage: 120 VAC, 60 Hz
I'm a: Hobbyist Tech
Posts: 8,935
Default Re: WestingHouse L2210NW Will not power.

sbf1060ct and stpf1020ct measurements look good. The reason you get a resistance that constantly goes up is because your meter is charging the electrolytic capacitors.
Also, if your meter doesn't have a diode/continuity test, use the 2000 Ohm scale only to test diodes. Out of circuit, a good diode will test between 100 and 1000 Ohms one way and appear open circuit the other way. A bad diode will show close to 0 ohms (short circuit) in both directions.
momaka is offline   Reply With Quote
Old 08-21-2010, 02:24 PM   #31
retiredcaps
Badcaps Veteran
 
Join Date: Apr 2010
City & State: Canada
Posts: 9,088
Default Re: WestingHouse L2210NW Will not power.

Quote:
Originally Posted by testas86 View Post
k3114 measurements:

com pin 1 red pin 3= meter set to 20kohm reads 10.02

sbf1060ct measurements:

1) red on pin 1, black on pin 2. meter set to 20k and numbers seem to keeps going up with out stop
Let's try this again.

What is the make and model number of your multimeter? For example, you might answer Craftsman model 34555.

For the transistor test, just choose the 200 ohm setting and leave it there. Retest pin 1 to pin 3. If it reads 1 on the left hand side, the multimeter is telling you the resistance is > 200 ohms. If it really reads 10.2 ohms, it is shorted.

For the diode tests, choose the diode setting on your multimeter. It will look like an arrow pointing to the right. Once you find it, retest the diodes.
retiredcaps is offline   Reply With Quote
Old 08-21-2010, 05:16 PM   #32
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.

ok i retested the transistor com 1 and red 3 and it came back 1 at 200ohms

sbf1060ct measurements:

1) red on pin 1, black on pin 2. 130
2) black on pin 1, red on pin 2. numbers seem to keeps going up with out stop
3) red on pin 3, black on pin 2. 129
4) black on pin 3, red on pin 2. numbers seem to keeps going up with out stop


stpf1020ct measurements:

1) red on pin 1, black on pin 2. 419
2) black on pin 1, red on pin 2. numbers seem to keeps going up with out stop
3) red on pin 3, black on pin 2. numbers seem to keeps going up with out stop
4) black on pin 3, red on pin 2. just shows a 1 on the left side
testas86 is offline   Reply With Quote
Old 08-21-2010, 05:22 PM   #33
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.



this is my multimeter
Attached Images
File Type: jpg IMG_20100821_155843.jpg (963.0 KB, 130 views)
testas86 is offline   Reply With Quote
Old 08-21-2010, 05:26 PM   #34
retiredcaps
Badcaps Veteran
 
Join Date: Apr 2010
City & State: Canada
Posts: 9,088
Default Re: WestingHouse L2210NW Will not power.

See that arrow symbol (in the red box) just right of the 200 ohm? That is your diode test function. Please retest the diodes with that function. Or are the results in post #32 done with the diode test?

BTW, I have that exact same multimeter. It is absolute crap. I got a different one.

Question: After you test the diode in diode setting functionality, switch it back to 200 ohms and touch the red and black probe together. What reading do you get?

Last edited by retiredcaps; 08-21-2010 at 05:31 PM..
retiredcaps is offline   Reply With Quote
Old 08-21-2010, 05:31 PM   #35
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.

its a DT-830b digital multimeter

and .7
testas86 is offline   Reply With Quote
Old 08-21-2010, 05:33 PM   #36
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.

i also have a mastech mas830L
testas86 is offline   Reply With Quote
Old 08-21-2010, 05:37 PM   #37
retiredcaps
Badcaps Veteran
 
Join Date: Apr 2010
City & State: Canada
Posts: 9,088
Default Re: WestingHouse L2210NW Will not power.

Quote:
Originally Posted by testas86 View Post
i also have a mastech mas830L
I'm sure the mastech will be way better. I hate to ask, but please redo ALL your measurements again. I have no faith in the DT-830b readings (I have one and it is busted).

It shouldn't take you more than 5 minutes to remeasure. Please post results including the reading when you touch the two probes together (this is your baseline/calibration).
retiredcaps is offline   Reply With Quote
Old 08-22-2010, 06:46 PM   #38
testas86
Senior Member
 
Join Date: May 2010
Posts: 124
Default Re: WestingHouse L2210NW Will not power.

with the mastech

SET TO 200 .7 when touched red and black probes together


k3114 measurements:

com pin 1 red pin 2= 1. set on 2k ohms

com pin 1 red pin 3= 1. set on 2k ohms

com pin 2 red pin 3= 1. set on 2k ohms


sbf1060ct measurements:

1) red on pin 1, black on pin 2. 1. set on 2k ohms also where the diode test symbol is
2) black on pin 1, red on pin 2. flashes from 1. to 800 down to 400 and back up
3) red on pin 3, black on pin 2. flashes from 1. to 400 down to 81 and back up
4) black on pin 3, red on pin 2. flashes from 1. to 800 to 870

stpf1020ct measurements:

1) red on pin 1, black on pin 2. -1.
2) black on pin 1, red on pin 2. -1.
3) red on pin 3, black on pin 2. -1.
4) black on pin 3, red on pin 2. 1.
testas86 is offline   Reply With Quote
Old 08-22-2010, 07:14 PM   #39
retiredcaps
Badcaps Veteran
 
Join Date: Apr 2010
City & State: Canada
Posts: 9,088
Default Re: WestingHouse L2210NW Will not power.

Quote:
Originally Posted by testas86 View Post
k3114 measurements:

com pin 1 red pin 2= 1. set on 2k ohms
com pin 1 red pin 3= 1. set on 2k ohms
com pin 2 red pin 3= 1. set on 2k ohms
These measurements indicate that K3114 is NOT shorted. It is a good transistor. 1 means out of range on this multimeter. That means, the resistance is greater than 2000 ohms.

The 1 should show up on the left hand side of the multimeter display.

Many newbies seem to confuse 1.0 ohms (on the right hand side of the display) with 1 (on the left to indicate out of range). My meter says 0L to let you know it is out of range. So if you interpreted 1 (on the left) has 1.0 ohms, I can see how you thought this transistor was shorted.

Quote:
stpf1020ct measurements:

1) red on pin 1, black on pin 2. -1.
2) black on pin 1, red on pin 2. -1.
3) red on pin 3, black on pin 2. -1.
4) black on pin 3, red on pin 2. 1.
Those don't look right to me, but let's assume they are good for now.

I suggest if you still have 1 second to black that you move onto checking the CCFLs and tranformers.
retiredcaps is offline   Reply With Quote
Old 08-23-2010, 01:22 AM   #40
sabre504
Badcaps Veteran
 
Join Date: May 2010
City & State: Cambridge (UK)
Posts: 399
Default Re: WestingHouse L2210NW Will not power.

Hi sorry to butt in but this board apart from maybe the pins that connect to the logic board
is the same as the board they use in the acer 1916 maybe another to look at for spares or comparison
sabre504 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2019
Powered by vBulletin ®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 04:36 PM.
Did you find this forum helpful?