LG F1200 Service Manual page 63

4. TROUBLE SHOOTING
(12) Infrared Data Association Trouble
Block Diagram
DBB
(CALYPSO
plus)
• Infrared Signal Flow
- Infrared is enable by SD
- TX_IRDA,RX_IRDA,SD_IRDA signals from DBB
• Check Points
- Check the power supply.
- Check the soldering of Components
- Check the IrDA Transceiver
• Trouble Shooting Setup
- Enter the engineering mode.
- Go to menu 'Baseband ➝ IrDA Test'
• Trouble Shooting Procedure
- Check the SD,TX, RX signal.
- Check the soldering.
- Check the IrDA Transceiver.
TX IRDA
UART
RX IRDA
IrDA
SD IRDA
- 62 -
VBAT
IrDA
V_IO
Tx IrD
Rx IrD
SD IrD