Hi, I'm hoping for a bit of guidance again. I'm getting 5v standby but no 12v or 24v.
I've checked Vs and out on IC1 and read 0v on both. Looking at the schematic I can't understand where Vs is coming from and what I should be checking next.
Any help is appreciated, Thanks....
LastMinuteMan
Member
Last Activity: 02-22-2023, 08:34 PM
Joined: 07-08-2014
Location: manchester
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TECO TL3291RW. No 12v/24v on PSU (fsp228_3f01)
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
Forgot to attach the data sheet for U8. I've had a look and cant tell if the result I got is normal or not.... -
Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
5v comes from PSU and is good, hooked it up to a bench power supply, nothing got warm. So I have checked round the circuit looking for where the 5v stops.
the input voltage on chip U8 is at 5v. Vout checks at 0.3??...Last edited by LastMinuteMan; 07-25-2014, 01:29 PM.Leave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
It's the 5v that's shortedLeave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
Yea the test point is low and I cant find the short and as a last ditch attempt I was thinking to disable the scc and see what blows or gets hot lol.Leave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
Does anyone know how I could disable the short circuit protection on this board?...Leave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
I checked the voltage on the cap and reads 0.69. I have also tried removing the cap and the pad reads the same....Leave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
well my panel is led and the board on ebay was used with an lcd so probably not any good to me. Looks like I'm stuck with it at minute lol. Seen one that matches but the guy wants 50 quid for it :/...Leave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
Ah that's a shame, the board I'm looking at came from an Hitachi. Thanks for the quick reply....Leave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
Well the V.reg seems to be ok. I'm thinking about buying a replacement board but before I do, does anyone know if I can use a 17MB62-1 v2 in place of my 17MB62-1 v1?
The boards look identical. ThanksLeave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
Yep already done that all test good. Thanks
Just had a look at the v.reg and the pin that measured 0.69v is Vin...So I presume the problem is before the reg?
Just checked pin to pin ohms to ground on the reg. Pin1 (ground). 0.97ohms Pin2 (Vout) 197ohms Pin3 Vin 506ohms?...Leave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
Thanks for your help, I will try changing out the voltage reg and report back with the good or bad news lol.Leave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
Pin one, on the mainboard (soft_sw) reads 0 ohms to ground. The rest check ok. I'm guessing that's not normal?...Leave a comment:
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Re: bush led24970dvdfhd (vestel_17mb62-1) flashing red led
Put some better pics up. ThanksLeave a comment:
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bush led24970dvdfhd (vestel_17mb62-1) flashing red led
Hi, I've bought this tv to repair and hoping for a little help. When I bought the tv the owner said it just goes into standby. When I got home and tried turning it on I got the flashing light no pattern just flashes steadily.
The owner as now told me they had it looked at and said they was told it needs a new mainboard (vestel_17mb62-1)...
Anyways I checked tp202 on the mainboard and it is reading 0v and from the manual it seems it should be reading 3.3v to be good. I have checked the voltages going into to mainboard from CN1 and they read as follows
...Last edited by LastMinuteMan; 07-19-2014, 11:21 AM. -
lg pdp42x3
Hi everyone, I've got a LG pdp42x30201 to repair and need some help and advice.
When plugged in the green light comes on and then goes straight to red. I've had the back off and replaced several bad caps on the PSU and still the same.
My next step was to try unplugging the y sus board and z sus board and still get the same green light then red. I then moved onto the main board and with the connector on the top left of the board unplugged the PSU switches on briefly before shutting down.
Would this point to a short on the main board? -
Re: New Members - please post your introductions here
Hi, came across the forum when looking for replacement caps for an LG TV and with the vast amount of info on here I thought it would be worth joining.Leave a comment:
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