HP vc4820T - Thin Client Troubleshooting Manual page 26

Table 2-2 COM Port Functionality
pin #
pin 1
pin 2
pin 3
pin 4
pin 5
pin 6
pin 7
pin 8
pin 9
CAUTION:
before you configure it. See
on page 16 for locations.
NOTE: The jumpers in the following table are in the same orientation illustrated in
Port Jumper Locations on the System Board on page
Table 2-3 Configuring Serial Port Power
18 Chapter 2 Hardware Changes
COM1
(Standard)
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
To prevent severe equipment damage, carefully verify the location of the COM Port Jumper
Figure 2-10 Serial Port Jumper Locations on the System Board
COM2–Cable COM3
Connection
(Customized)
(Customized)
+5V/DCD +5V/+12V/DCD
RXD/TXD/RXD (TTL)/ RXD/TXD
TXD (TTL)
TXD/RXD/TXD (TTL)/ TXD/RXD
RXD (TTL)
DTR/+5V DTR/+5V/+12v
GND GND
DSR DSR
RTS RTS
RXD/TXD/RXD (TTL)/ CTS
TXD (TTL)
TXD/RXD/TXD (TTL)/ RI
RXD (TTL)
16.
COM4
(Customized)
+5V/+12V/DCD
RXD/TXD
TXD/RXD
DTR/+5V/+12v
GND
DSR
RTS
CTS
RI
Figure 2-10 Serial