EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: Ben Cherry on February 11, 2017, 11:28:42 pm
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I have a 16500B that I upgraded the interface card in. It was working properly with the 16500L card, I replaced it with a 16500H card, now I get no video. The raster is there but no video. there was a 40 pin cable going to the monitor and a 10 pin video cable going to the CPU board. the new card doesn't have connectors for either. The service manuals for all three do not show what is supposed to happen with these two cables and I see no place to plug in either. Can anyone tell me if there is an adapter card or special cable that I am missing?
Thank you,
Ben
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The 16500L had a buffer circuit to mirror the video to an external port, which the 16500H does not have (it has the 16505A port instead). So the monitor needs to connect to the CPU.
The 16500B Service Manual (easy to find online) says:
"Remove the cable connecting the CRT module to the CPU board.
To release the cable, push the tabs on the board connector to the outside of the connector.
With the interface module installed, you will not use this cable. Save the cable to use in case the interface module is removed."
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Thank you! I must have missed that reading all those manuals and getting bloodshot eyes. I did find another thread that called out the signals on both the 40 pin and the 10 pin connectors. is it as simple as making a special cable by splicing signal to signal?
Ben
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yes it was cable 16500-61602 that I needed. I made one by cutting the 40 pin and the 10 pin cables that were left over and splicing the signal wires to signals. the 40 pin is called out in the service manual. The 10 pin is 2-Hsync, 4-vsync, 6-blue, 8-green, 10-red, all others ground.
I now have video!
Ben
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Great, thanks for the update.