For a product like the Soundworks 740 this timing is defined within the units firmware, so it's not possible to adapt it according to what the ST7066U requires without reengineering. 1:1 compatible by dimensions and instruction set the ST7066U requires a slightly different initialization timing as I've got to know by reading lots of contributions on several other forums meanwhile. The part came in really fast and I replaced the old, broken one the same day - unfortunately just to discover the Soundworks 740 does not like the change in LCD-controller at all ! While the original LCD-strip PC1602WRT-LWB-F-YB is built around a Hitachi HD44780 controller the Newhaven unit uses a ST7066U by Sitronix. I would have liked to be able to post some higher detail screen shots but I do not think that would be wise since it is a copyrighted board.Following TheFlinx suggestion I've ordered one of the Newhaven displays (NHD-0216SZ-FSW-FBW) at Digikey. to connect it in parallel to the output of the existing SN75179B differential driver/receiver pair that (as far as I can tell) directly connects to the SPDIF input of the audio processor? I've added a gschem screen shot to clarify what I mean. I already have a TORX173 and the power and ground pins are easy enough to figure out but I am unsure how to connect the output of the TORX173 to the existing circuit and could use a little help with that. But I would like to build it into the device itself. There are plenty of optical to coaxial circuits to be found on-line, or I could build the opto/coax-converter of Elektor 4/97 page 40. Is there a method to verify this using a cheap multimeter? The main reason I made this forum thread is because I would like to add an optical input to the existing coaxial input. Nevertheless, I think I have traced the fault (through deductive reasoning) to the op-amp (NJM2123) directly behind the analog input jack of the rear speakers. I do not care to much about it, my intended use for the device is SPDIF/AC3 decoding only. It does produce a lot of (white/pink) noise on the left surround in this mode (and also on the right surround but a lot softer) when I turn the volume to 50% or higher. (I ended up using just 5 Panasonics and almost 100 Elnas) Replacing the electrolytic caps has solved the other issues, except for the missing left surround channel when using analog 'four point' mode. The Elna caps become quite a bit larger then the existing ones as the capacitance rises, so I also ordered some Panasonic NHG caps not being sure the Elna's would fit. A friend recommended I use Elna Silmic II capacitors and my ears are very happy I followed his advice. Since all the electrolytic caps are at least 16 years old I decided to replace all of them with high quality audio ones. The capacitor buffering the processor power-supply was defective (high ESR). The problems with the dirty pots was an easy fix and the constantly resetting audio-processor turned out to be a common issue with this device. No sound from the left surround speaker in analog 'four point' mode.A randomly resetting audio processor (causing all channels to briefly mute).It has been in active service all those years and it was really starting to show But its worst 'feature' is the linear potentiometer used to control the sub-woofer level instead of using a logarithmic version (that it desperately needs). To keep the costs down even further, they've also skimped on the quality of the electrolytic capacitors. Although it has 5.1 channels for AC3 decoding it only supports 4 channels on both analog and digital DIN inputs. for its price range but could have been better. (Zoran 38601 processor and PCM1716 DACs on the decoder and 3x TDA7360 with TL072CP op-amps on the amplifier board) The build quality is also OK. Although 'made in China' it is a great 5.1 channel amp build around pretty decent components. Both thumbs up for Dave! I recently decided to revise my 16 year old 'Desktop Theater' instead of buying something new. I discovered EEVBlog by watching YouTube videos. Currently I am looking to reinvent myself because I cannot do that kind of field-work anymore due to lower back issues. Although it was a painful experience I ended up in the field of electronics working as a security technician for almost 20 years. I managed to pull it out of the socket just far enough so that I could touch both poles with my fingers. I discovered electricity at a very young age by fooling around with the 'child proofing adapter' my parents had placed in the wall outlet that powered my night lamp. I am 41 years old and was born and raised in a small town near Amsterdam. Hi everyone! I'm new to this forum so I will introduce myself first.
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