Toshiba QOSMIO G20 manual TV tuner Troubleshooting Troubleshooting Procedures

2.16 TV tuner Troubleshooting 2 Troubleshooting Procedures

2.16 TV tuner Troubleshooting

To check if TV tuner is malfunctioning or not, follow the troubleshooting procedures below as instructed.

Procedure 1: Connector Check and Replacement Check

Procedure 1 Connector Check and Replacement Check

The connection of cables, boards and module may be defective. Otherwise, they may be faulty. Disassemble the computer following the steps described in Chapter 4 and perform the following checks:

Check 1 Make sure the following connectors are firmly connected.

TV antenna cable

TV tuner coaxial cable

	<AV-IN board>
J9610
CN9661
		TV tuner harness
		<System board>
		CN5661
PJ601	PJ621	124-pin
<TV tuner module>		CN2220

If the connection is loose, reconnect it firmly and return to Procedure 2. If the problem still occurs, perform Check 2.

Check 2 TV antenna cable may be faulty. Replace it with a new one following the steps in Chapter 4. If the problem still occurs, perform Check 3.

Check 3 TV tuner module may be faulty. Replace it with a new one following the steps in Chapter 4. If the problem still occurs, perform Check 4.

Check 4 AV-IN board may be faulty. Replace it with a new one following the steps in Chapter 4. If the problem still occurs, perform Check 5.

Check 5 Cables among AV-IN board, system board and TV tuner module may be faulty. Replace them with a new one following the steps in Chapter 4. If the problem still occurs, perform Check 6.

Check 6 System board may be faulty. Replace it with new one following the instructions in Chapter 4.

2-66 QOSMIO G20 Maintenance Manual (960-511)