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This is what might have happened when you have a Sony IVO-10 portable CD-i player with a non-working LCD screen

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A quick flashback: "Sony released in the USA in 1992 the Sony IVO-11, together with the IVO-10, two Intelligent Discmans that were in fact base-case CD-i players. It features the same CD-i logo that was used mainly in Asia, in titles that were published by Japan Interactive Media. Sony had its own names for the CD-i nomenclature: This was a Portable CD-i Viewer. It is still an interesting piece of history in the world of videogames and multimedia technology: Together with Philips, also Sony and Matsushita (Panasonic and others) were involved in the development of CD-i, but in the end this Sony CD-i player is the only physical product by one of the Japanese companies that actually was released. " 



While most people talk about 'Philips' and 'CD-i' in one sentence, the CD-i format was actually a joint effort by Philips, Sony and Matsushita (Panasonic). The latter two Japanese companies did not support the CD-i format until the end, and Panasonic never passed the prototype status, but Sony went a bit further and actually released two portable CD-i units, the IVO-10 and the IVO-11. For those who remember, we uncovered the unreleased IVO-12 CD-i player by Sony last year here on Interactive Dreams, and another portable Sony CD-i player here. The ones that were actually released, are getting more rare and when they show up, they are often malfunctioning: capacitors are leaking, the battery is dead (and these players don't just function on AC/DC power but they need the battery) and often the LCD screen is leaking or degrading. CD-i member Leon Kiriliuk now looked further into the faulty LCD screen of the Sony IVO-10 CD-i player:


Leon:"Back to the portable Sony CDI unit with no working LCD. After tracing video signals, I could see it dies at the CXA1485Q LCD driver. This unit get 5VDC but missing -8V! An inverter unit generates -8, -20 and 13V. I can see unreg voltage into it but nothing out. So the inverter unit in a Sony portable CDI is not a serviceable part. It generates the voltages for the LCD panel, fluorescent tube igniter and voltages to LCD driver. Let’s open it up! And of course ... more leaky capacitors in here. The Inverter Unit is Sony part # 1-466-637-11 (nonexistent on the Internet) Love how nothing inside is marked on the PCB; when this dies, the rare Sony CD-I portable LCD stops working."

I remember saving a PC Engine GT with the exact same fault. Backlight lights out just fine but the LCD is transparent, no image forms in it. No -8v on the LCD driver IC... It turned out to be SMD chip resistors that were "digested" by capacitor juice! 


[Thanks, Leon Kiriliuk, Leo Oliveira]



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