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- AMI TECH TIP
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- TECH TIP NO. 29.001
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- DATE: August 17, 1991
- BOARD TYPE: Series 29, SX Cache II
- BOARD REVISION: B
- BOARD FREQUENCY: 20 MHz and 25 MHz
- ORIGINATOR: Terry Brown
- RELEASED BY: Documentation Control
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- Several cases of non-functional on-board floppy disk controllers on Series 29
- boards, both 20 MHz and 25 MHz, have been reported.
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- ICT testing of several of the failed boards has shown that capacitors C29 and
- C30 were exchanged in position on the board. This causes the oscillator
- circuit for the on-board floppy controller to fail to operate, resulting in
- failure of the on-board controller.
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- The proper values for C29 and C30 are
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- C29 - 20 picofarads
- C30 - 10 nanfarads.
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- This error is detected by the current ICT program for this board.
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