Re: Dead Acoustic Solutions IPOS 150
No joy. Looks like it time to start testing the power board components....
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Re: Dead Acoustic Solutions IPOS 150
Yes in England, CON4 GND, EPWM, BK_ON, FDATA2, FDATA1,APWM - No real voltage is registered but millivolts are flicking as soon as the switch is connected, whereas the reading was steady before.
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Re: Dead Acoustic Solutions IPOS 150
Thanks PlainBill, Con2 (unused) Key1 Key2 5v. Con4 20V, AGND, GND, GND, GND,12V, 5V,5VSB, STB (left to right). STB=0V Large Cap 340VDC
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Re: Dead Acoustic Solutions IPOS 150
Pictures - The leads (brown and blue) from the board are for the fuse...
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Dead Acoustic Solutions IPOS 150
Hello I have an Acoustic Solutions CTVL32W3HD, with the IPOS 150 REV: 1.8 board, symptoms dead - no lights at the front and no flashing LED at the rear (on the power board). I've replaced EC17, EC18 (both bulged), Q16 and Q17 (both shorted) and F2 3.15a (open circuit). I tested D10 (out of board) tested ok. On con3 the only power output was on the 5VSB which equalled 5.06vdc. Any help - Cheers
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Re: ENVISION EN9410e 19" Monitor
Hello Bill - A quick update i now have 5v and 12v lines leaving the power board - 340v across the main cap (240V uk) tested with a capacitance meter I will replace the 22uf to be on the safe side - fuses are ok - dry joints brought back the 5 and 12v. What I get now is a complete dead looking monitor with the power led flashing on for a micro second then nothing. I have repaired six or seven monitors since you helped me out with my first monitor, but here I am again help!
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Re: ENVISION EN9410e 19" Monitor
Hi I have a Hanns.G HX191 with this same power supply - I re-capped the board with 105c 25volt caps apart from the large 100uf 400v and the 22uf c123 which both tested fine. The problem is I have no output voltages on the 5v and the 12v lines - any ideas? Thank you
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Re: Acer AL1914 Dead
Sorry to take so long getting back (been very busy) - I got the pair of IC109 SG6841SZ's back (thanks Bobdee) replaced them and the outcome was two working monitors - So big thanks to Bobdee for sourcing the part Plainbill for the time and using the grey matter (for suppling the brains) and Kc8adu for naming the faulty part. If this helps anybody else with the same problem plese drop a thank you for the time and effort these 3 put into this thread
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Re: Acer AL1914 Dead
Thanks Bobdee - Guess what - I won't be getting them from China (postage more than the ic and the ic 3 time the price from the USA!) lol
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Re: Acer AL1914 Dead
Just in case I had a quick look on the internet and i'm having trouble finding where I can buy 1 or 2 of the SG6841SZ ic's any ideas - Cheers
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Re: Acer AL1914 Dead
Well after taking you're advice with the dry joints, I re-soldered everything that was even slightly suspect. Re-tested the voltage on the 1m resistor - The side closest to the transformer was 164v the other side 4.78v (starting to enjoy this!!)
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Re: Acer AL1914 Dead
typing lessons needed 0.994 m ohms Sorry (read this 3 times before submitting)
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Re: Acer AL1914 Dead
R907 Brown Black Green - 994 ohms
Now this was a bit strange - when I first tried Maybe I didn't have a great connection but the reading was climbing into the 300v range then the display seemed to zero out - then at one end it was 0.473v and the other was 0.5047
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Re: Acer AL1914 Dead
England 240V - Spot on - 0 volts between the two pads - IC109 SG6841SZ - Cheers
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Re: Acer AL1914 Dead
Thanks PlainBill, The large cap is about right at 340v but I have no output voltages at the plugs - I tested from the earth connection to each of the connections in the plug and only got 0 volts
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Acer AL1914 Dead
Hello this is my first post so be gentle please
The story so far - A Friend got five of these monitors from work all with the same symptoms: Dead no response from the front controls or LED - He changed C914 (1000uf) & C915 (1000uf) which got two of the monitors working and gave the rest to me . Before he gave then to me he put a working power board in each one. Two worked fully and one had a white screen (not too bothered about this one at the mo) So I know that the two remaining monitors would work with a good power supply board. I changed all the electrolytic capacitors...
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