Re: HannsG HW173D dead. Recap = new fault.



Thanks, I will get some new caps and try reokacing those, though some of them I have already changed, admittedly with old caps from a TV set

Stu...

Re: HannsG HW173D dead. Recap = new fault.

Additional info :

The p/s board is marked AC INPUT 100-240V 1A 50/60Hz DC OUTPUT +12V 0.4A +5.2V 3.0A
P/N 3BS01 46412GP
(also says FSP032-2PI01)

Googling for this shows it as VIEWSONIC, N/A, PC MONITOR - POWER SUPPLY, FSP032-2PI01, 3BS0146412GP at discount-merchant.com, so this board isn't limited to just my model of LCD display.

But there I remain stuck.

Stu

Re: HannsG HW173D dead. Recap = new fault.

I don't see any ic marked 203d6 on either side of the p/s board. (I googled that, I see it is an 8 pin surface mount IC. Only 8 pin surface mount IC that I have on this board is on the underside, and it's marked sp8k3, so I don't think that's it).

Nor do I have an ic 431 on the board! Only ic I can see is IC230, which is a 3 pin thing in a transistor-style package. Can't read what is actually printed on the package, just IC230 on the PCB next to it.

I also note that the circuit diagram you kindly attached refers...

Re: HannsG HW173D dead. Recap = new fault.

Thanks, off to check voltages now.

I realise the caps I put in as replacements might be bad, that's why I wondered if it might not be worth bothering to replace all the caps with new ones if there's likely to be a more serious fault elsewhere. But was encouraged by getting the thing to power up, even if I don't get a sensible display.

I don't have an ESR meter Only test equipment I have is digital voltmeter!


Stu

I've been given a HannsG HW173D LCD display that doesn't work, to keep or throw out. So I thought I'd see what was wrong with it.

Original Fault : display didn't light, power LED flashed Green then Orange, with a curious flick in color.

Opened it up, found bulging CapXon capacitors on PSU. Changed these for caps I had lying around, including 2 from an old TV set.

Original (CapXon) Replaced with
1000uF 10v 1000uF 25v (from old TV)
1000uF 10v 1000uF 16v (from old TV)
450uF 25v 450uF 35v (Sanyo, New)
...