3 chip size led error codes, 3 chip size led error codes -5 – Fluke 900 User Manual
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FLUKE 900 SERVICE MANUAL
Selftest
3.1.3 Chip Size LED Error Codes
If self test fails, on rare occasions, the chip size LEDs may light to indicate an error. In the list
below, the 8 LEDs are shown with a 0 for unlighted and a 1 for lighted.
00000001: KEYBOARD CIO PortA. CPU cannot communicate.
00000010: KEYBOARD CIO PortB
00000011: TIME QO PortA
00000100: TIME CIO PortB
00000101: FREQ CIO PortA
00000110: FREQ CIO PortB
00000111: Display not ready
00001000: ROM checksum error
00001001: SRAM error
00001010: Stack underflow
00001011: Unimplemented interrupt occurred
00001100: Invalid intermpt vector
00001101: Not used
00001110: Incorrect peripheral serviced
00001111: UART transmit error
00010000: UART other errors ( special receive conditions)
00010001: UART parity error
00010010: DRAM error
00010011 : Overlay error
00010100: Not used
00010101: MAP CIO PortA
00010110: MAP CIO PortB
00010111 : Display memory error
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