Re: sharp lc32sb24u bulb / inverter problem
To confirm the confirmation-Just did this repair also on a dumpster tv..1 sec blink.....
Lamp size: just for my curiosity, 3.4x705mm (glass only measured per ccfl mfg tutorial) I imagin 4mm might fit. There is some play in the length at the ends in original lamps, around 5mm total so a tiny bit longer would still fit. Ends are like a .250" glass fuse set-up.
Replaced 6 bulbs for $18. From Sharp LC32sb23u(not 24u) found on C/L as non working.
$18 invested and now have nice tv for my spare...
walking
Member
Last Activity: 09-03-2012, 06:40 PM
Joined: 06-04-2012
Location: sacramento,ca
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
[B][COLOR="Blue"]Opps, sorry.
It displays 'l' , I just assumed it was an 'L' and didn't want 'l' to be mistaken for '1'.[/COLOR][/B]
If D1692 is good then I'm back at square one with the possibly shorted @ shottky diodeRe: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
[B][COLOR="Blue"]Opps, sorry.
It displays 'l' , I just assumed it was an 'L' and didn't want 'l' to be mistaken for '1'.[/COLOR][/B]
...Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
[COLOR="Blue"].335
L
I put a new one in its place. One from NTE. 89 cents only.
There are several smd diodes on the foil side of this board at and near the ICs tested. All but one test L and .5XX-.6XX. One tests .524 & 1.89 (D1692 red arrow picture). On the component side of the board there are more and they all test out .5xx & L.
[url]http://www.datasheetarchive.com/1SS355TE-17-datasheet.html[/url]
I guess I should pull that...Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
Tests good with dmm and with load....Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
[COLOR="Blue"][B]IC1621=933
IC1611=1720
IC1601=950[/B][/COLOR]
and IC1631=833
[B]While checking around I noticed one end of the Shottky diode in the attached picture is shorted to grnd. using the test grnd. location in the service manual. It's the only one in the entire TV that shows zero ohms to board.
I set dmm to diode test and it reads:
.321
.699
cathode end = 1691 ohm to board grnd.
anode = 000 [/B]Re: Sanyo...Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
Yes, apparently it is a good diode. My dumb theory about checking voltages back n forth of the pins isn't correct..lol...I wire up an old flashlight as a load and tested the diode and it works fine up to 4v .56amps.
Checking for shorts in LA5774s now........Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
[COLOR="Blue"]D1691 - Out of circuit.
1st reading .138 (red on anode)
2nd reading L
I also put 3.3v and then 5.0v to both ends without a load in between and got 3.3v & 5.0v out of BOTH ways with my dmm in circuit series.[/COLOR]
Oh, and someone sent me a Service Manual for this unit I just don't know if I can upload it here and not get in trouble.
thanks.Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
...Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
------------------------------
OOOPs I forgot about my grnd was to chassis while checking something else. Also never thought about the diode test mode being 'v' instead of "ohms", thought it was some oLaw combo figure displayed.
[B][COLOR="Red"]Meter on Diode Test-diodes in circuit[/COLOR][/B]
[COLOR="Blue"]YG812S04R:
D1611
pin 1 = .524v First reading-Red lead on pin 1 black on 2
pin 2 = .154v ...Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
[B][B][COLOR="Blue"]========================================[/COLOR][/B][/B]
[B]YG812S04R: Ohms/Vdc
D1611
pin 1 = .524 on=1.9v
pin 2 = .002 on=.002v
D1691
pin 1 = .004 on=.004v
pin 2 = .001 on=.001v
D1601
pin 1 = .600 on=3.4v
pin 2 = .001 on=.001v
_________________________
LA5774:Vdc "on"
IC1631
pin 1 = 14.7
pin 2 = 0
pin...Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
[B][COLOR="blue"](#'s shown in pic). I just notice in the ICcloseup pic that one labled YG812504 on the rightside and one on the leftside of pic looks like it might be burnt a little. I used a toothpick to feel them and the rough looking spots are rough and look kinda pock marked like they bubbled up under that white goop painted on[/COLOR][/B]
[U][COLOR="Purple"]Off topic: Thermocouple? Hope I didn't kill it by using it as a Capacitor discharger a couple times LOL....Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
[B][B][COLOR="blue"]Fluke was an 178 or something I think. I traded it next day as I didn't need 2 DMMs so I traded it to a buddy for 3 racquetball racquets. One was a $220 pro and a jug of new balls. Also got a Novax glove and something else in the $30 box, I think it's a cap discharger, maybe someone here knows what it is-the stiff wire thingy with yellow box attached and 2 probes, got 2 of them-one black and one yellow.
thanks again.[/COLOR][/B][/B]Re: Sanyo DP26746 LCD TV-sound,no...Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
Ooops, guess I didn't click right on the "upload" button...here it is...
...
Leave a comment:
-
Re: Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
[B]I think so. Only went there to buy his solder iron. He asked what I was working on (lcd monitor) and he handed me the entire box of stuff telling me he didn't have the aptitude to repair TVs and wished me luck. Didn't know that Cap88 is like over a $100 by itself, didn't even know what it was lol.[/B]
So with the F1 fuse good on the Tcon'y thingy-what would be the next step? New mainboard? Maybe its a switching problem, but I have no idea about the voltages on the cables if they are correct...Leave a comment:
-
Sanyo DP26746 LCD TV-sound,no picture,lamps are on.
Hello,
So far:
1.tested all but 3 .1uf caps(tops are flat) with Cap88a, all tested test good. Cap88 cannot go down to .1uf. All caps are Nichicon 105c.
2. tested all diodes, test good off board.
3. tested what I know for sure are fuses and all are good on smps, Tcon.
4. Mainboard-either there are none or I do not know what the designation for the fuse(s) are. No F, PF,CF or any F's at all.
5. Screen has no faint image when viewed in dark room/flashlight.
6. Backlighting is all on.
7. No whinning noise. Just the normal "click"... -
Re: Your Best Dumpster Finds
Found a few flat screens 19" and smaller and working 98,XP & Vista comps. Usually one every 2-3 months or so. Ride a bike every morning and learned to take the 5 mile one way thru the alleys mostly. A lot of people upgrade and just set stuff out back for someone to find.
Best so far is a HP1720n dual core 1.86 & keyboard along with a 1815 MFC and a 19" widescreen.
My girlfriend saw some pickup dumping a bunch of junk into our dumpster so she went over to lock it and there was a birthday bag with $100 bill...Leave a comment:
-
Re: I Need Advice on the purchase of a Multimeter
I've been using a freebie bag stuffer shirt pocket meter from an Introduction to Electronics seminar I got 3 years ago. I used to see these at the flea market for $2.
Unless you're going to later "fix" heart monitors or passenger aircraft systems don't spend more than $20.
Now if you're going to get into soldering/desoldering much. Spend the $ and get a good used station or better yet a vacuum station.Leave a comment:
-
Re: Firefox and Broadband users, READ THIS!!
Hmm, Nice.
Pages load like greased lightning now.
I notice there is like a 250 millisec delay then BANG the entire page is there.
My dsl is 1.26 and .38 up and loading is waaaay faster now.Leave a comment:
-
Re: Phillips 23" black and white
IC 101. $9.74 from the surplus shop and 3 hours of looking for it and 3 hours of patching it together.
Anyone else gets this problem just goto ebay I noticed after wasting my day off that a T board 9965 for this is only $14.Leave a comment:
-
Re: Element ELCHW261 White screen
I've "repaired" two of these with white screens. Both had loose cables @ the screen from the mainboard. Got them from a big box store returns liquidation auction for $20 for 3 of them. I have another with white screen but the cables are fine and continuous...so tracing away at it.
See pic, other end of circled cable was loose on two machines....Leave a comment:
-
Phillips 23" black and white
Roomies TV just started looking like this. Can this be bad caps or the mainboard?
Worth saving or just another paper weight?
thanks....
No activity results to display
Leave a comment: