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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Help identifying which pins to put power to!!
Hi,
I have a NCR 5953-2000 12.1" LCD screen for a cash register. The case of the lcd screen states the monitor uses +12v DC/2.0A Now the actual power module it uses is similar to a PS2 connector, but I dont know which pins i need to connect power to... Ive tried to find a pin diagran for the PS2 connectors (in case it was standard) but I am unable to locate anything. Pictures of the unit are here on my webspace www.iinet.net.au/~perfection/monitor/ There seems to be 6 inputs, all i could think that maybe it used +12v -12v +5v -5v ? but its strange it didnt say this on the case. If anyone can help it would be greatly appreciated!!! Cheers |
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On Wed, 27 Oct 2004 16:50:11 +1000, "Machi Smith"
put finger to keyboard and composed: Hi, I have a NCR 5953-2000 12.1" LCD screen for a cash register. The case of the lcd screen states the monitor uses +12v DC/2.0A Now the actual power module it uses is similar to a PS2 connector, but I dont know which pins i need to connect power to... Ive tried to find a pin diagran for the PS2 connectors (in case it was standard) but I am unable to locate anything. Pictures of the unit are here on my webspace www.iinet.net.au/~perfection/monitor/ There seems to be 6 inputs, all i could think that maybe it used +12v -12v +5v -5v ? but its strange it didnt say this on the case. If anyone can help it would be greatly appreciated!!! Cheers The ADM207EARS (U13) is an RS-232 Line Driver/Receiver which is powered from +5V (Vcc = pin11) and generates +/-10V from on-chip charge pumps. Hence, unless there is another device that requires -12V, I doubt that -12V would be supplied externally. There appears to be only one filter cap near the power connector (C77, 10uF, 35V) which would normally suggest that only 12V, and ground, may be needed. However fuse F1 appears to connect to the Vcc test point and L19 connects to an input pin. This may be the +5V rail. Just to be sure, I would trace the 5V pins of U13 and U15 (93C46 EEPROM) to see where they go. At least two of the pins appear to go to one or more of the rear connectors via L20 and L21. It may help to follow the traces. - Franc Zabkar -- Please remove one 's' from my address when replying by email. |
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On Wed, 27 Oct 2004 16:50:11 +1000, "Machi Smith"
wrote: Hi, I have a NCR 5953-2000 12.1" LCD screen for a cash register. The case of the lcd screen states the monitor uses +12v DC/2.0A Now the actual power module it uses is similar to a PS2 connector, but I dont know which pins i need to connect power to... Ive tried to find a pin diagran for the PS2 connectors (in case it was standard) but I am unable to locate anything. Pictures of the unit are here on my webspace www.iinet.net.au/~perfection/monitor/ There seems to be 6 inputs, all i could think that maybe it used +12v -12v +5v -5v ? but its strange it didnt say this on the case. If anyone can help it would be greatly appreciated!!! Cheers What are you trying to accomplish? To be honest, these are pretty expensive to try to reuse as a generic lcd-display or to risk blowing up. Checkout these prices: http://www.point0fsale.com/wholesale/b4269.htm http://www.xcc.com/detailsV2.lasso/0...r%20 DynaKey/ Perhaps eBay is in order? Might get enough to buy a nice 18" lcd. |
#4
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Gudday,
I didnt realize they were worth so much.... I got 3 of them really cheap but with no power supplies.... Ive since worked out how to power them up from the post above yours (Thanks Franc), and now i know you need special PCI-LCD cards to go with them which have power onboard via a mollex connector on the pci card itself. So... now Ive got to find one (or 3)... Thanks for all your help... and chris... I'll take your advice there i think Cheers! wrote in message ... On Wed, 27 Oct 2004 16:50:11 +1000, "Machi Smith" wrote: Hi, I have a NCR 5953-2000 12.1" LCD screen for a cash register. The case of the lcd screen states the monitor uses +12v DC/2.0A Now the actual power module it uses is similar to a PS2 connector, but I dont know which pins i need to connect power to... Ive tried to find a pin diagran for the PS2 connectors (in case it was standard) but I am unable to locate anything. Pictures of the unit are here on my webspace www.iinet.net.au/~perfection/monitor/ There seems to be 6 inputs, all i could think that maybe it used +12v -12v +5v -5v ? but its strange it didnt say this on the case. If anyone can help it would be greatly appreciated!!! Cheers What are you trying to accomplish? To be honest, these are pretty expensive to try to reuse as a generic lcd-display or to risk blowing up. Checkout these prices: http://www.point0fsale.com/wholesale/b4269.htm http://www.xcc.com/detailsV2.lasso/0...r%20 DynaKey/ Perhaps eBay is in order? Might get enough to buy a nice 18" lcd. |
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