Lexicon RV-8, Service Manual

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Serial Debug Port
The Serial Debug Port is available to provide diagnostic status to be viewed on an external PC from the
D9 connector labeled RS232. Using a terminal or a PC running a terminal program, the progress of the
diagnostics can be monitored and test failure information is reported. The serial protocol is 19200bps, 8,
O, 1, (8 data bits, Odd Parity, 1 Stop Bit).
Serial Debug Cable
The cable required to connect the RS232 serial debug port to the computer is a straight-through serial
interface cable. A null modem adapter or cable should not be used. The RV-8 RS232 connector on the
rear panel is a D9 female; so one end of the serial cable must be a D9 male. The other connector on the
cable depends upon the RS232 connector used on the computer. The computer may have a D9 or a D25
male connector. Typically computers have a D9 for COM 1 and a D25 for COM 2. However, some newer
computers use a D9 for both COM 1 and COM 2. The COM port used on the computer does not matter,
however you must ensure that whatever serial communications program is being used has the correct
computer COM port selected.
Serial Debug Program
The serial debug program controls the communication from an RV-8 to a computer. This program allows
a user to view activity of the unit and to control and configure the unit for testing. The debug program is
used extensively to perform audio and video testing of a unit in the audio and video ATE programs.
Error Codes
The error codes for the diagnostic tests that report additional failure information consist of six parts as
described below:
“E## tXX aYYYYYY
wZZZZZZ rQQQQQQ”
E##: Failure Number
The E stands for error and the hexadecimal number after the E indicates test number from the list below.
tXX: Error Codes List
NO_ERROR 0x0
ADDR_FAILURE 0x1
DATA_FAILURE 0x2
TIMEOUT_FAILURE 0x3
COUNTER_FAILURE 0x4
NON_VOL_DATA_FAILURE 0x5
OPCODE_FAILURE 0x6
AVRX_FPGA_ID_NO_MATCH 0x7
DAR_FPGA_ID_NO_MATCH 0x8
AUDIO_FPGA_ID_NO_MATCH 0x9
ANALOG_FPGA_ID_NO_MATCH 0xA
VFD_TIME_OUT 0xB
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