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Document ID: YAST-3GKP7X |
5250 Emulation Adapters - Emulation connection dropping
Applicable to: World-Wide
Affected Cards:
ASM 64G3956 ( ISA)
ASM 64G3495 ( MCA)
ASM 64G3513 ( MCA)
ASM 64G3953 ( ISA)
Problem:
These cards may cause other terminals or systems to drop off the communications line when the 5250 adapters card's system unit is power off. The line may drop momentarily or may remain down until powered off until unit is powered back on. This problem may occur in any type machine.
This problem may also show up if customer is experiencing trouble trying to establish host sessions with other twinaxial devices on the same daisy chain. If a powered off 5250 card is on the same line as the troubled device check the assembly/level of the card.
Solution:
Removing resistors R28 and R27 from the card. These can be removed by using needle nose pliers to break off these resistors. The pads for the SE components may come off during this operation but this will not affect performance of the card. R28 is labeled on the card and is located near the top of the back is the 15 pin connector. R27 is labeled and located above capacitor C2 and between SMT capacitor C6 and the at the head of diode D16. Both of the resistors should be completely removed.
Keywords: OBI 5250 Emulation Adapters Connection Dropping
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Hint Category |
5250 Emulation | |
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Date Created |
28-04-97 | |
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Last Updated |
05-01-99 | |
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Revision Date |
05-01-2000 | |
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Brand |
IBM Options | |
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Product Family |
Emulation Adapters | |
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Machine Type |
5250 | |
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Model |
All | |
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TypeModel |
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Retain Tip (if applicable) |
H12787 | |
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