Cannot connect to Xevo TQ-S micro, Xevo TQD, or SQD2 using Hyperterminal - WKB9987

SYMPTOMS

• RS232 cable is connected from MS to PC
• Hyperterminal is started using COM1
• No arrow cursor (>) appears, only the placemarker (_)
• System does not respond
• Tried the alternative port speed setting (See article #2838, Nonsense characters in Hyperterminal Log)

ENVIRONMENT

• Xevo TQ-S micro with Kontron EPC (PCB SAP part number 700011091) and new Adlink ApolloLake EPC (700013713)
• Xevo TQD with EPC (PCB SAP part number 700011089) and new Adlink ApolloLake EPC (700013715)
• SQ Detector 2 (SQD2) with EPC (PCB SAP part number 700011089) and new Adlink ApolloLake EPC (700013715)

CAUSE

The new EPC requires a null modem cable to communicate with the PC via Hyperterminal.
This is due to pins 2 and 3 of the serial port being swapped on PCB 210001013, compared with the old PCB.

FIX or WORKAROUND

1. Use a male-female null modem cable (RS232 with pins 2 and 3 crossed).  Waters does not spare this cable out.  However, these cables can be easily found online.
   1. Alternatively, a female-female null modem cable with a male-male gender-changing adaptor may be used.
      The female-female null modem cable is SAP part number 8932388-S.
      The gender-changing adaptor part number is: 700011903 (MALE - FEMALE ADAPTOR).
      
      

ADDITIONAL INFORMATION

See this article by National Instruments: The Difference Between a Null Modem and Straight Through Serial Cable