HP vc4820T - Thin Client Troubleshooting Manual page 25

Item Jumper
3 COM2 JP3
4 COM2 JP2
5 COM3 JP1
6 COM3 JP2
7 COM3 JP3
8 COM4 JP1
9 COM4 JP2
10 COM4 JP3
Before beginning the configuration process, review
on page 8 for procedures you should follow before and after installing or replacing hardware.
WARNING! Before removing the side access panel, ensure that the thin client is turned off and the
power cord is disconnected from the electrical outlet.
To configure the serial ports:
1. Locate the serial port and jumper.
2. Place jumpers on the appropriate pins. (See
on page 18 to determine the appropriate pins.)
CAUTION: An unsupported configuration can cause severe equipment damage. Carefully verify
COM Port Jumper locations and supported configurations before you configure a serial port.
See Figure 2-10 Serial Port Jumper Locations on the System Board on page 16
Configuring Serial Port Power on page 18
Table 2-1 COM Port Default Configuration
pin # COM1
pin 1 DCD
pin 2 RXD
pin 3 TXD
pin 4 DTR
pin 5 GND
pin 6 DSR
pin 7 RTS
pin 8 CTS
pin 9 RI
General Hardware Installation Sequence
Table 2-3 Configuring Serial Port Power
for Jumper locations and supported configurations.
COM2 COM3
+5V +5V
RXD RXD
TXD TXD
DTR DTR
GND GND
DSR DSR
RTS RTS
RXD (TTL) CTS
TXD (TTL) RI
Configuring Powered Serial Ports
and Table 2-3
COM4
+5V
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
17