I replaced the ic several times from different sellers. Unfortunaly nothing worked. Also ill tried all the tips you guys provided me. And iam greatfull for that.
This morning i walked into my shack, and the screen was cracked thanks to one of my kiddos.
So the case is close now....
Danny kikkert
Member
Last Activity: 12-15-2024, 09:34 AM
Joined: 08-10-2024
Location: Westerhaar-Vriezenveensewijk
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where can i order good ones?...Leave a comment:
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tv model is sharp lc-60le635 e.
the last chips i ordered by a regular shop, thi first one on ebay or ali.
is the chip suposed to deliver voltage to transformer pins 1-4?...Leave a comment:
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idd replaced the diode with ann original.
my electronics knowledge is a little poor so i guess that the te transformer have to deliver some voltage to pin 5 on the chip. but there is none!
or should the cip deliver voltage to the transformer?
on pins 2 and 3 i have normal voltage. on 1-4 none. when icheck with multimeter pins 1 and 4 have continuity....Leave a comment:
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so ive installed the new ic7903, nothing! i also noticed a shorted diode D7903.
i gues the transformer is dead​Leave a comment:
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Today I received new ic, I'll keep you updated...Leave a comment:
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Thanks, I always test with a lamp in series, I desolderd most components in that area and tested them. They tested fine.
On the transformer I get B+ voltage on pin 2-3, but on pin 1-4 nothing, the trafo also has no shorts.
On the cirquitry of ic 7902 also everything tested fine but also there is no voltage.
Is it possible that the voltage needed for that circuit comes from ic 7801?...Leave a comment:
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Hi my name is Danny from holland.
Iam 43 years, and was a construction site manager.
Unfortunately I was struck by covid in feb 2020, and nowadays I even cannot do much because of that phenomena.
So Iam seeking to do something what doesn't require time pressure, something that keeps quit when you leave it for a couple of days.
As I was younger I experimented with electronics and computers.
So I thought to start again where I left once.
Unfortunately my brain is become a mess in time, and short memory is shorted to ground.
So I seek...Leave a comment:
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I just ordered new ones, just in case. Now from a shop in Germany....Leave a comment:
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Did you mean to remove the @5 on the photo?, pin 4 to 3 is not shorted, the caps 7918 and 7907 are fine I checked them with an esr meter and multimeter.
Greetings dannny...Leave a comment:
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The r7900 was blown, R7902 gave bad reading, the C7901 wasn't blown, but replaced (wanted to check out of cirquit, but fell on the ground and lost it some where in my barn) d7950 was shorted. Yesterday I replaced the ic with new one. Nothing changed.
Cap 7918 and D7906 did look fine in circuitry, I Wil remove them and check them later on
Thanks for the reply...Leave a comment:
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Dead dps-162kp-1 powerboard
Hi everyone,
I have a dps-162kp-1 runtka932wjqz powerboard wich has no power at all on the cold side.
I replaced ic7903, r7900, R7902, C7901, d7950.
Checked the diodes around the chip and also the caps.
On the ic pin 5 no voltage, pin7-8= 315V
On the T7901 pin 1-4 no voltage, pin 2-3=315V
Anybody have any idea where to look further?
Any help is welcome
Thanks Danny from holland
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