LG HCS5650 Operation Guide - Page 69

TV/STB RS-232 Monitor Requirements / RS-232 Troubleshooting

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TV/STB RS-232 Monitor Requirements / RS-232 Troubleshooting RS-232 Communication Requirments RS-232 Pin Configuration Wiring Diagram of the TV/STB Display Control Connector Type of Connector; D-Sub 9-Pin Female No. Pin Name 1 No Connection 5 2 TXD (Transmit data) 2 3 RXD (Receive data) 1 4 No Connection 5 GND 6 No Connection 3 7 No Connection 4 8 No Connection 9 No Connection Monitors listed below require RS-232 Null Modem DB9 Cable with male connectors at each end. Depending on the type of Null modem cable, one or two gender changers may be required. RS-232C Null Configuration 3-Wire Configuration (Serial male-male NULL modem cable) TV/STB NC 1 TXD 2 RXD 3 NC 4 GND 5 NC 6 NC 7 NC 8 NC 9 D-Sub 9-pin Male Null-Modem Cable Monitor 1 NC 2 TXD 3 RXD 4 NC 5 GND 6 NC 7 NC 8 NC 9 NC D-Sub 9-pin Male Monitors: M3701-BH M4201-BH RS-232 Troubleshooting Improper RS-232 Communications Setup - Selects Incorrect Source at Power Up TV/STB powers On TV. Flashes selected HDMI/DVI source but selects incorrect Aux source. - Check settings for Installer menu items 108, 109, 110 and 113. - Displays 'No Signal' message at Power Off TV/STB does not power Off TV and displays 'No Signal' message. - Check settings for Installer menu items 108, 109, 110 and 113. PAGE 69

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PAGE 69
TV/STB RS-232 Monitor Requirements / RS-232 Troubleshooting
Type of Connector; D-Sub 9-Pin Female
Monitors listed below require RS-232 Null Modem DB9 Cable
with male connectors at each end. Depending on the type of
Null modem cable, one or two gender changers may be required.
3-Wire Configuration
(Serial male-male NULL modem cable)
RS-232C Null Configuration
RS-232 Pin Configuration Wiring Diagram
of the TV/STB Display Control Connector
RS-232 Communication Requirments
No.
Pin Name
1
No Connection
2
TXD (Transmit data)
3
RXD (Receive data)
4
No Connection
5
GND
6
No Connection
7
No Connection
8
No Connection
9
No Connection
5
2
1
3
4
1
2
3
4
5
6
7
8
9
NC
TXD
RXD
NC
GND
NC
NC
NC
NC
TV/STB
D-Sub 9-pin
Male
D-Sub 9-pin
Male
Monitors:
M3701-BH
M4201-BH
1
2
3
4
5
6
7
8
9
NC
TXD
RXD
NC
GND
NC
NC
NC
NC
Monitor
Null-Modem
Cable
Impr
oper RS-232 Communications Setup
- Selects Incorrect Source at Power Up
TV/STB powers On TV. Flashes selected HDMI/DVI source but
selects incorrect Aux source.
- Check settings for Installer menu items 108, 109, 110 and 113.
- Displays ‘No Signal’ message at Power Off
TV/STB does not power Off TV and displays ‘No Signal’ message.
- Check settings for Installer menu items 108, 109, 110 and 113.
RS-232 Troubleshooting