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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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#1
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Monitor diagram needed
I have an IBM G70 monitor that has gone dark. It still has high voltage and
the CRT lights. So I think the trouble is in the logic circuitry or the power supply. When I switch it on I hear the degaussing surge. But when I press the degauss button, nothing happens. In fact, none of the controls have any effect. Can anyone help? A schematic diagram of this or a similar unit would be of immense assistance. Thanks, Bob |
#2
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Monitor diagram needed
Bob wrote:
I have an IBM G70 monitor that has gone dark. It still has high voltage and the CRT lights. So I think the trouble is in the logic circuitry or the power supply. When I switch it on I hear the degaussing surge. But when I press the degauss button, nothing happens. In fact, none of the controls have any effect. Can anyone help? A schematic diagram of this or a similar unit would be of immense assistance. Here's a post from Anatek's monitor archive, maybe similar problem: QUOTE QUESTION NO. P1027-10: IBM 6544-403 monitor has raster but no video. However, when powering down video is momentarily present. Replaced LM1205 on CRT pcb-same. On this G70 model, when there is no video with the signal cable still attached, but the picture flashes on the screen during shut-off, the usual cause is a bad rubberized-membrane control panel (under the CRT face), which must be replaced. /QUOTE Dave |
#3
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Monitor diagram needed
Thanks for the quote but my symptoms are different. I simply get NO display
under any circumstances. Not even a flash. Bob |
#4
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Monitor diagram needed
Bob wrote:
Thanks for the quote but my symptoms are different. I simply get NO display under any circumstances. Not even a flash. You could try the diagram for the IBM 6543 (G50), (if you haven't already), to see if similar enough. Here's one location: http://www.geocities.com/monitorss/s...IBM%206543-G50 Dave (Uh Oh, time to change SpamMotel email address again - Damn Spammers) |
#5
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Monitor diagram needed
"Bob" bravely wrote to "All" (01 Jul 04 10:22:01)
--- on the heady topic of " Monitor diagram needed" Bo From: "Bob" Bo Thanks for the quote but my symptoms are different. I simply get NO Bo display under any circumstances. Not even a flash. Try turning the screen control on the fbk. I've seen one with a bad spot on this type before. Be very, very careful of High Voltage! A*s*i*m*o*v .... You mean 15" sparks are SUPPOSED to come out of this thing?!? |
#6
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Monitor diagram needed
Thanks Dave but that link doesn't work.
Any other ideas? Bob |
#7
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Monitor diagram needed
Bob wrote:
Thanks Dave but that link doesn't work. Any other ideas? Try: http://fileshare.eshop.bg/ Also, just do a Google search: http://www.google.com/search?q=ibm+g50+schematic Dave |
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