HP t505 Troubleshooting Guide t505 Flexible Thin Client - Page 20

Table, Configuring Serial Port Power,

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To configure the serial ports: 1. Locate the serial port and jumper. 2. Place jumpers on the appropriate pins. (See Table 2-3 Configuring Serial Port Power on page 15 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 2-4 Serial Port Jumper Locations on the System Board on page 13 and Table 2-3 Configuring Serial Port Power on page 15 for Jumper locations and supported configurations. Table 2-1 COM Port Default Configuration pin # COM1 COM2 pin 1 DCD +5V pin 2 RXD RXD pin 3 TXD TXD pin 4 DTR DTR pin 5 GND GND pin 6 DSR DSR pin 7 RTS RTS pin 8 CTS RXD (TTL) pin 9 RI TXD (TTL) COM3 +5V RXD TXD DTR GND DSR RTS CTS RI COM4 +5V RXD TXD DTR GND DSR RTS CTS RI Table 2-2 COM Port Functionality pin # COM1 (Standard) pin 1 pin 2 DCD RXD pin 3 TXD pin 4 pin 5 pin 6 pin 7 pin 8 DTR GND DSR RTS CTS pin 9 RI COM2-Cable Connection (Customized) COM3 (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) COM4 (Customized) +5V/+12V/DCD RXD/TXD TXD/RXD DTR/+5V/+12V GND DSR RTS CTS RI 14 Chapter 2 Hardware Changes

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To configure the serial ports:
1.
Locate the serial port and jumper.
2.
Place jumpers on the appropriate pins. (See
Table
2
-
3
Configuring Serial Port Power
on page
15
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
-
4
Serial Port Jumper Locations on the System Board
on page
13
and
Table
2
-
3
Configuring Serial Port Power
on page
15
for Jumper locations and supported
configurations.
Table 2-1
COM Port Default Configuration
pin #
COM1
COM2
COM3
COM4
pin 1
DCD
+5V
+5V
+5V
pin 2
RXD
RXD
RXD
RXD
pin 3
TXD
TXD
TXD
TXD
pin 4
DTR
DTR
DTR
DTR
pin 5
GND
GND
GND
GND
pin 6
DSR
DSR
DSR
DSR
pin 7
RTS
RTS
RTS
RTS
pin 8
CTS
RXD (TTL)
CTS
CTS
pin 9
RI
TXD (TTL)
RI
RI
Table 2-2
COM Port Functionality
pin #
COM1
(Standard)
COM2–Cable
Connection
(Customized)
COM3
(Customized)
COM4
(Customized)
pin 1
DCD
+5V/DCD
+5V/+12V/DCD
+5V/+12V/DCD
pin 2
RXD
RXD/TXD/RXD (TTL)/
TXD (TTL)
RXD/TXD
RXD/TXD
pin 3
TXD
TXD/RXD/TXD (TTL)/
RXD (TTL)
TXD/RXD
TXD/RXD
pin 4
DTR
DTR/+5V
DTR/+5V/+12V
DTR/+5V/+12V
pin 5
GND
GND
GND
GND
pin 6
DSR
DSR
DSR
DSR
pin 7
RTS
RTS
RTS
RTS
pin 8
CTS
RXD/TXD/RXD (TTL)/
TXD (TTL)
CTS
CTS
pin 9
RI
TXD/RXD/TXD (TTL)/
RXD (TTL)
RI
RI
14
Chapter 2
Hardware Changes